Tech ENABLE_LEGACY_OPENGL_REMOVAL - porting remaining changes

(cherry picked from commit prusa3d/PrusaSlicer@2f572d3cf0 )

resources/shaders/background_attr.vs

@@ -0,0 +1,12 @@
+#version 110
+
+attribute vec3 v_position;
+attribute vec2 v_tex_coord;
+
+varying vec2 tex_coord;
+
+void main()
+{
+	tex_coord = v_tex_coord;
+    gl_Position = vec4(v_position, 1.0);
+}

resources/shaders/cali.fs

@@ -1,8 +0,0 @@
-#version 110
-
-uniform vec4 uniform_color;
-
-void main()
-{
-    gl_FragColor = uniform_color;
-}

resources/shaders/cali.vs

@@ -1,6 +0,0 @@
-#version 110
-
-void main()
-{
-    gl_Position = ftransform();
-}

resources/shaders/flat_attr.vs

@@ -2,9 +2,10 @@
 
 attribute vec3 v_position;
 
-uniform mat4 projection_view_model_matrix;
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
 
 void main()
 {
-    gl_Position = projection_view_model_matrix * vec4(v_position, 1.0);
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
 }

resources/shaders/flat_texture_attr.vs

@@ -0,0 +1,15 @@
+#version 110
+
+attribute vec3 v_position;
+attribute vec2 v_tex_coord;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+varying vec2 tex_coord;
+
+void main()
+{
+	tex_coord = v_tex_coord;
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
+}

resources/shaders/gouraud.fs

@@ -48,7 +48,6 @@ varying vec2 intensity;
 
 uniform PrintVolumeDetection print_volume;
 
-varying vec4 model_pos;
 varying vec4 world_pos;
 varying float world_normal_z;
 varying vec3 eye_normal;

resources/shaders/gouraud.vs

@@ -38,7 +38,6 @@ varying vec2 intensity;
 
 varying vec3 clipping_planes_dots;
 
-varying vec4 model_pos;
 varying vec4 world_pos;
 varying float world_normal_z;
 varying vec3 eye_normal;
@@ -60,7 +59,6 @@ void main()
 	NdotL = max(dot(eye_normal, LIGHT_FRONT_DIR), 0.0);
 	intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
 
-    model_pos = gl_Vertex;
     // Point in homogenous coordinates.
     world_pos = volume_world_matrix * gl_Vertex;
 

resources/shaders/gouraud_attr.vs

@@ -0,0 +1,77 @@
+#version 110
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SPECULAR (0.0 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SHININESS 5.0
+
+#define INTENSITY_AMBIENT    0.3
+
+const vec3 ZERO = vec3(0.0, 0.0, 0.0);
+
+struct SlopeDetection
+{
+    bool actived;
+	float normal_z;
+    mat3 volume_world_normal_matrix;
+};
+
+attribute vec3 v_position;
+attribute vec3 v_normal;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+uniform mat4 volume_world_matrix;
+uniform SlopeDetection slope;
+
+// Clipping plane, x = min z, y = max z. Used by the FFF and SLA previews to clip with a top / bottom plane.
+uniform vec2 z_range;
+// Clipping plane - general orientation. Used by the SLA gizmo.
+uniform vec4 clipping_plane;
+
+// x = diffuse, y = specular;
+varying vec2 intensity;
+
+varying vec3 clipping_planes_dots;
+
+varying vec4 world_pos;
+varying float world_normal_z;
+varying vec3 eye_normal;
+
+void main()
+{
+	// First transform the normal into camera space and normalize the result.
+    eye_normal = normalize(normal_matrix * v_normal);
+
+	// Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+	// Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+	float NdotL = max(dot(eye_normal, LIGHT_TOP_DIR), 0.0);
+
+	intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, eye_normal)), 0.0), LIGHT_TOP_SHININESS);
+
+	// Perform the same lighting calculation for the 2nd light source (no specular applied).
+	NdotL = max(dot(eye_normal, LIGHT_FRONT_DIR), 0.0);
+	intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    // Point in homogenous coordinates.
+    world_pos = volume_world_matrix * vec4(v_position, 1.0);
+
+    // z component of normal vector in world coordinate used for slope shading
+    world_normal_z = slope.actived ? (normalize(slope.volume_world_normal_matrix * v_normal)).z : 0.0;
+
+    gl_Position = projection_matrix * position;
+    // Fill in the scalars for fragment shader clipping. Fragments with any of these components lower than zero are discarded.
+    clipping_planes_dots = vec3(dot(world_pos, clipping_plane), world_pos.z - z_range.x, z_range.y - world_pos.z);
+}

resources/shaders/gouraud_light_attr.vs

@@ -0,0 +1,45 @@
+#version 110
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+attribute vec3 v_position;
+attribute vec3 v_normal;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+
+void main()
+{
+    // First transform the normal into camera space and normalize the result.
+    vec3 normal = normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    gl_Position = projection_matrix * position;
+}

resources/shaders/gouraud_light_instanced_attr.vs

@@ -0,0 +1,50 @@
+#version 110
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+// vertex attributes
+attribute vec3 v_position;
+attribute vec3 v_normal;
+// instance attributes
+attribute vec3 i_offset;
+attribute vec2 i_scales;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+
+void main()
+{
+    // First transform the normal into camera space and normalize the result.
+    vec3 eye_normal = normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(eye_normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 world_position = vec4(v_position * vec3(vec2(1.5 * i_scales.x), 1.5 * i_scales.y) + i_offset - vec3(0.0, 0.0, 0.5 * i_scales.y), 1.0);
+    vec4 eye_position = view_model_matrix * world_position;
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(eye_position.xyz), reflect(-LIGHT_TOP_DIR, eye_normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(eye_normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    gl_Position = projection_matrix * eye_position;
+}

resources/shaders/mm_contour_attr.fs

@@ -0,0 +1,13 @@
+#version 110
+
+const float EPSILON = 0.0001;
+
+uniform vec4 uniform_color;
+
+void main()
+{
+    gl_FragColor = uniform_color;
+    // Values inside depth buffer for fragments of the contour of a selected area are offset
+    // by small epsilon to solve z-fighting between painted triangles and contour lines.
+    gl_FragDepth = gl_FragCoord.z - EPSILON;
+}

resources/shaders/mm_contour_attr.vs

@@ -0,0 +1,11 @@
+#version 110
+
+attribute vec3 v_position;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+void main()
+{
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
+}

resources/shaders/mm_gouraud_attr.fs

@@ -0,0 +1,90 @@
+#version 110
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+const vec3  ZERO    = vec3(0.0, 0.0, 0.0);
+const float EPSILON = 0.0001;
+//BBS: add grey and orange
+//const vec3 GREY = vec3(0.9, 0.9, 0.9);
+const vec3 ORANGE = vec3(0.8, 0.4, 0.0);
+const vec3 LightRed = vec3(0.78, 0.0, 0.0);
+const vec3 LightBlue = vec3(0.73, 1.0, 1.0);
+uniform vec4 uniform_color;
+
+uniform bool volume_mirrored;
+
+uniform mat4 view_model_matrix;
+uniform mat3 normal_matrix;
+
+varying vec3 clipping_planes_dots;
+varying vec4 model_pos;
+varying vec4 world_pos;
+
+struct SlopeDetection
+{
+    bool actived;
+	 float normal_z;
+    mat3 volume_world_normal_matrix;
+};
+uniform SlopeDetection slope;
+
+void main()
+{
+    if (any(lessThan(clipping_planes_dots, ZERO)))
+        discard;
+    vec3  color = uniform_color.rgb;
+    float alpha = uniform_color.a;
+
+    vec3 triangle_normal = normalize(cross(dFdx(model_pos.xyz), dFdy(model_pos.xyz)));
+#ifdef FLIP_TRIANGLE_NORMALS
+    triangle_normal = -triangle_normal;
+#endif
+
+    if (volume_mirrored)
+        triangle_normal = -triangle_normal;
+
+    vec3 transformed_normal = normalize(slope.volume_world_normal_matrix * triangle_normal);
+     
+    if (slope.actived) {
+        if(world_pos.z<0.1&&world_pos.z>-0.1)
+         {
+              color = LightBlue;
+              alpha = 1.0;
+         }
+         else if( transformed_normal.z < slope.normal_z - EPSILON)
+        {
+            color = color * 0.5 + LightRed * 0.5;
+            alpha = 1.0;
+        }
+    }
+    // First transform the normal into camera space and normalize the result.
+    vec3 eye_normal = normalize(normal_matrix * triangle_normal);
+
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(eye_normal, LIGHT_TOP_DIR), 0.0);
+
+    // x = diffuse, y = specular;
+    vec2 intensity = vec2(0.0);
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec3 position = (view_model_matrix * model_pos).xyz;
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position), reflect(-LIGHT_TOP_DIR, eye_normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(eye_normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    gl_FragColor = vec4(vec3(intensity.y) + color * intensity.x, alpha);
+}

resources/shaders/mm_gouraud_attr.vs

@@ -0,0 +1,35 @@
+#version 110
+
+const vec3 ZERO = vec3(0.0, 0.0, 0.0);
+
+attribute vec3 v_position;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+uniform mat4 volume_world_matrix;
+// Clipping plane, x = min z, y = max z. Used by the FFF and SLA previews to clip with a top / bottom plane.
+uniform vec2 z_range;
+// Clipping plane - general orientation. Used by the SLA gizmo.
+uniform vec4 clipping_plane;
+
+varying vec3 clipping_planes_dots;
+varying vec4 model_pos;
+varying vec4 world_pos;
+struct SlopeDetection
+{
+    bool actived;
+	float normal_z;
+    mat3 volume_world_normal_matrix;
+};
+uniform SlopeDetection slope;
+void main()
+{
+    model_pos = vec4(v_position, 1.0);
+    // Point in homogenous coordinates.
+    world_pos = volume_world_matrix * model_pos;
+
+    gl_Position = projection_matrix * view_model_matrix * model_pos;
+    // Fill in the scalars for fragment shader clipping. Fragments with any of these components lower than zero are discarded.
+    clipping_planes_dots = vec3(dot(world_pos, clipping_plane), world_pos.z - z_range.x, z_range.y - world_pos.z);
+}

resources/shaders/options_110.fs

@@ -1,8 +0,0 @@
-#version 110
-
-uniform vec4 uniform_color;
-
-void main()
-{
-    gl_FragColor = uniform_color;
-}

resources/shaders/options_110.vs

@@ -1,22 +0,0 @@
-#version 110
-
-uniform bool use_fixed_screen_size;
-uniform float zoom;
-uniform float point_size;
-uniform float near_plane_height;
-
-float fixed_screen_size()
-{
-    return point_size;
-}
-
-float fixed_world_size()
-{
-    return (gl_Position.w == 1.0) ? zoom * near_plane_height * point_size : near_plane_height * point_size / gl_Position.w;
-}
-
-void main()
-{
-    gl_Position = ftransform();
-    gl_PointSize = use_fixed_screen_size ? fixed_screen_size() : fixed_world_size();
-}

resources/shaders/options_120.fs

@@ -1,22 +0,0 @@
-// version 120 is needed for gl_PointCoord
-#version 120
-
-uniform vec4 uniform_color;
-uniform float percent_outline_radius;
-uniform float percent_center_radius;
-
-vec4 calc_color(float radius, vec4 color)
-{
-    return ((radius < percent_center_radius) || (radius > 1.0 - percent_outline_radius)) ?
-            vec4(0.5 * color.rgb, color.a) : color;
-}
-
-void main()
-{
-    vec2 pos = (gl_PointCoord - 0.5) * 2.0;
-    float radius = length(pos);
-    if (radius > 1.0)
-        discard;
-
-    gl_FragColor = calc_color(radius, uniform_color);
-}

resources/shaders/options_120.vs

@@ -1,22 +0,0 @@
-#version 120
-
-uniform bool use_fixed_screen_size;
-uniform float zoom;
-uniform float point_size;
-uniform float near_plane_height;
-
-float fixed_screen_size()
-{
-    return point_size;
-}
-
-float fixed_world_size()
-{
-    return (gl_Position.w == 1.0) ? zoom * near_plane_height * point_size : near_plane_height * point_size / gl_Position.w;
-}
-
-void main()
-{
-    gl_Position = ftransform();
-    gl_PointSize = use_fixed_screen_size ? fixed_screen_size() : fixed_world_size();
-}

resources/shaders/printbed.fs

@@ -7,15 +7,15 @@ uniform sampler2D texture;
 uniform bool transparent_background;
 uniform bool svg_source;
 
-varying vec2 tex_coords;
+varying vec2 tex_coord;
 
 vec4 svg_color()
 {
     // takes foreground from texture
-    vec4 fore_color = texture2D(texture, tex_coords);
+    vec4 fore_color = texture2D(texture, tex_coord);
 
     // calculates radial gradient
-    vec3 back_color = vec3(mix(back_color_light, back_color_dark, smoothstep(0.0, 0.5, length(abs(tex_coords.xy) - vec2(0.5)))));
+    vec3 back_color = vec3(mix(back_color_light, back_color_dark, smoothstep(0.0, 0.5, length(abs(tex_coord.xy) - vec2(0.5)))));
 
     // blends foreground with background
     return vec4(mix(back_color, fore_color.rgb, fore_color.a), transparent_background ? fore_color.a : 1.0);
@@ -24,7 +24,7 @@ vec4 svg_color()
 vec4 non_svg_color()
 {
     // takes foreground from texture
-    vec4 color = texture2D(texture, tex_coords);
+    vec4 color = texture2D(texture, tex_coord);
     return vec4(color.rgb, transparent_background ? color.a * 0.25 : color.a);
 }
 

resources/shaders/printbed.vs

@@ -1,9 +1,9 @@
 #version 110
 
-varying vec2 tex_coords;
+varying vec2 tex_coord;
 
 void main()
 {
     gl_Position = ftransform();
-	tex_coords = gl_MultiTexCoord0.xy;
+	tex_coord = gl_MultiTexCoord0.xy;
 }

resources/shaders/printbed_attr.vs

@@ -0,0 +1,15 @@
+#version 110
+
+attribute vec3 v_position;
+attribute vec2 v_tex_coord;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+varying vec2 tex_coord;
+
+void main()
+{
+	tex_coord = v_tex_coord;
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
+}

resources/shaders/thumbnail_attr.vs

@@ -0,0 +1,51 @@
+#version 110
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+attribute vec3 v_position;
+attribute vec3 v_normal;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+
+uniform mat4 volume_world_matrix;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+varying vec4 world_pos;
+
+void main()
+{
+    // First transform the normal into camera space and normalize the result.
+    vec3 normal = normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    // Point in homogenous coordinates.
+    world_pos = volume_world_matrix * gl_Vertex;
+
+    gl_Position = projection_matrix * position;
+}

resources/shaders/variable_layer_height_attr.vs

@@ -0,0 +1,60 @@
+#version 110
+
+#define INTENSITY_CORRECTION 0.6
+
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SPECULAR (0.0 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SHININESS 5.0
+
+#define INTENSITY_AMBIENT    0.3
+
+attribute vec3 v_position;
+attribute vec3 v_normal;
+attribute vec2 v_tex_coord;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+uniform mat4 volume_world_matrix;
+uniform float object_max_z;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+
+varying float object_z;
+
+void main()
+{
+	// =====================================================
+	// NOTE:
+	// when object_max_z > 0.0  we are rendering the overlay
+	// when object_max_z == 0.0 we are rendering the volumes
+	// =====================================================
+
+    // First transform the normal into camera space and normalize the result.
+    vec3 normal = (object_max_z > 0.0) ? vec3(0.0, 0.0, 1.0) : normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular)
+    NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0);
+    
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    // Scaled to widths of the Z texture.
+    object_z = (object_max_z > 0.0) ? object_max_z * v_tex_coord.y : (volume_world_matrix * vec4(v_position, 1.0)).z;
+        
+    gl_Position = projection_matrix * position;
+}

src/OrcaSlicer.cpp

@@ -2370,7 +2370,7 @@ int CLI::run(int argc, char **argv)
                     }
 
                     ThumbnailsParams thumbnail_params;
-                    GLShaderProgram* shader = opengl_mgr.get_shader("thumbnail");
+                    GLShaderProgram* shader = opengl_mgr.get_shader("thumbnail_attr");
                     if (!shader) {
                         BOOST_LOG_TRIVIAL(error) << boost::format("can not get shader for rendering thumbnail");
                     }

src/slic3r/GUI/3DBed.cpp

@@ -47,7 +47,7 @@ bool init_model_from_poly(GLModel &model, const ExPolygon &poly, float z)
         return false;
 
     GLModel::Geometry init_data;
-    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3T2, GLModel::Geometry::index_type(triangles.size()) };
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3T2 };
     init_data.reserve_vertices(triangles.size());
     init_data.reserve_indices(triangles.size() / 3);
 
@@ -71,12 +71,8 @@ bool init_model_from_poly(GLModel &model, const ExPolygon &poly, float z)
         const Vec3f p = {v.x(), v.y(), z};
         init_data.add_vertex(p, (Vec2f)(v - min).cwiseProduct(inv_size).eval());
         ++vertices_counter;
-        if (vertices_counter % 3 == 0) {
-            if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-                init_data.add_ushort_triangle((unsigned short)vertices_counter - 3, (unsigned short)vertices_counter - 2, (unsigned short)vertices_counter - 1);
-            else
-                init_data.add_uint_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
-        }
+        if (vertices_counter % 3 == 0)
+            init_data.add_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
     }
 
     model.init_from(std::move(init_data));
@@ -210,17 +206,19 @@ void Bed3D::load_render_colors()
 
 void Bed3D::Axes::render()
 {
-    auto render_axis = [this](const Transform3f& transform) {
-        glsafe(::glPushMatrix());
-        glsafe(::glMultMatrixf(transform.data()));
+    auto render_axis = [this](GLShaderProgram* shader, const Transform3d& transform) {
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d matrix = camera.get_view_matrix() * transform;
+        shader->set_uniform("view_model_matrix", matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        shader->set_uniform("normal_matrix",     (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_arrow.render();
-        glsafe(::glPopMatrix());
     };
 
     if (!m_arrow.is_initialized())
         m_arrow.init_from(stilized_arrow(16, DefaultTipRadius, DefaultTipLength, DefaultStemRadius, m_stem_length));
 
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
+    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
     if (shader == nullptr)
         return;
 
@@ -231,15 +229,15 @@ void Bed3D::Axes::render()
 
     // x axis
     m_arrow.set_color(AXIS_X_COLOR);
-    render_axis(Geometry::assemble_transform(m_origin, { 0.0, 0.5 * M_PI, 0.0 }).cast<float>());
+    render_axis(shader, Geometry::assemble_transform(m_origin, { 0.0, 0.5 * M_PI, 0.0 }));
 
     // y axis
     m_arrow.set_color(AXIS_Y_COLOR);
-    render_axis(Geometry::assemble_transform(m_origin, { -0.5 * M_PI, 0.0, 0.0 }).cast<float>());
+    render_axis(shader, Geometry::assemble_transform(m_origin, { -0.5 * M_PI, 0.0, 0.0 }));
 
     // z axis
     m_arrow.set_color(AXIS_Z_COLOR);
-    render_axis(Geometry::assemble_transform(m_origin).cast<float>());
+    render_axis(shader, Geometry::assemble_transform(m_origin));
 
     shader->stop_using();
 
@@ -362,17 +360,17 @@ void Bed3D::on_change_color_mode(bool is_dark)
     m_is_dark = is_dark;
 }
 
-void Bed3D::render(GLCanvas3D& canvas, bool bottom, float scale_factor, bool show_axes)
+void Bed3D::render(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor, bool show_axes)
 {
-    render_internal(canvas, bottom, scale_factor, show_axes);
+    render_internal(canvas, view_matrix, projection_matrix, bottom, scale_factor, show_axes);
 }
 
-/*void Bed3D::render_for_picking(GLCanvas3D& canvas, bool bottom, float scale_factor)
+/*void Bed3D::render_for_picking(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor)
 {
-    render_internal(canvas, bottom, scale_factor, false, false, true);
+    render_internal(canvas, view_matrix, projection_matrix, bottom, scale_factor, false, false, true);
 }*/
 
-void Bed3D::render_internal(GLCanvas3D& canvas, bool bottom, float scale_factor,
+void Bed3D::render_internal(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor,
     bool show_axes)
 {
     m_scale_factor = scale_factor;
@@ -386,9 +384,9 @@ void Bed3D::render_internal(GLCanvas3D& canvas, bool bottom, float scale_factor,
 
     switch (m_type)
     {
-    case Type::System: { render_system(canvas, bottom); break; }
+    case Type::System: { render_system(canvas, view_matrix, projection_matrix, bottom); break; }
     default:
-    case Type::Custom: { render_custom(canvas, bottom); break; }
+    case Type::Custom: { render_custom(canvas, view_matrix, projection_matrix, bottom); break; }
     }
 
     glsafe(::glDisable(GL_DEPTH_TEST));
@@ -464,10 +462,10 @@ void Bed3D::render_axes()
         m_axes.render();
 }
 
-void Bed3D::render_system(GLCanvas3D& canvas, bool bottom)
+void Bed3D::render_system(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom)
 {
     if (!bottom)
-        render_model();
+        render_model(view_matrix, projection_matrix);
 
     /*if (show_texture)
         render_texture(bottom, canvas);*/
@@ -538,9 +536,12 @@ void Bed3D::render_system(GLCanvas3D& canvas, bool bottom)
     }
 
     if (m_triangles.get_vertices_count() > 0) {
-        GLShaderProgram* shader = wxGetApp().get_shader("printbed");
+        GLShaderProgram* shader = wxGetApp().get_shader("printbed_attr");
         if (shader != nullptr) {
             shader->start_using();
+            const Camera& camera = wxGetApp().plater()->get_camera();
+            shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+            shader->set_uniform("projection_matrix", camera.get_projection_matrix());
             shader->set_uniform("transparent_background", bottom);
             shader->set_uniform("svg_source", boost::algorithm::iends_with(m_texture.get_source(), ".svg"));
 
@@ -658,7 +659,7 @@ void Bed3D::update_bed_triangles()
     const_cast<BoundingBoxf3&>(m_extended_bounding_box) = calc_extended_bounding_box();
 }
 
-void Bed3D::render_model()
+void Bed3D::render_model(const Transform3d& view_matrix, const Transform3d& projection_matrix)
 {
     if (m_model_filename.empty())
         return;
@@ -670,20 +671,21 @@ void Bed3D::render_model()
     }
 
     if (!m_model.get_filename().empty()) {
-        GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
+        GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
         if (shader != nullptr) {
             shader->start_using();
             shader->set_uniform("emission_factor", 0.0f);
-            glsafe(::glPushMatrix());
-            glsafe(::glTranslated(m_model_offset.x(), m_model_offset.y(), m_model_offset.z()));
+            const Transform3d matrix = view_matrix * Geometry::assemble_transform(m_model_offset);
+            shader->set_uniform("view_model_matrix", matrix);
+            shader->set_uniform("projection_matrix", projection_matrix);
+            shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
             m_model.render();
-            glsafe(::glPopMatrix());
             shader->stop_using();
         }
     }
 }
 
-void Bed3D::render_custom(GLCanvas3D& canvas, bool bottom)
+void Bed3D::render_custom(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom)
 {
     if (m_model_filename.empty()) {
         render_default(bottom);
@@ -691,7 +693,7 @@ void Bed3D::render_custom(GLCanvas3D& canvas, bool bottom)
     }
 
     if (!bottom)
-        render_model();
+        render_model(view_matrix, projection_matrix);
 
     /*if (show_texture)
         render_texture(bottom, canvas);*/
@@ -708,8 +710,9 @@ void Bed3D::render_default(bool bottom)
     if (shader != nullptr) {
         shader->start_using();
 
-        const Transform3d matrix = wxGetApp().plater()->get_camera().get_projection_view_matrix();
-        shader->set_uniform("projection_view_model_matrix", matrix);
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
 
         glsafe(::glEnable(GL_DEPTH_TEST));
         glsafe(::glEnable(GL_BLEND));

src/slic3r/GUI/3DBed.hpp

@@ -146,8 +146,8 @@ public:
     bool contains(const Point& point) const;
     Point point_projection(const Point& point) const;
 
-    void render(GLCanvas3D& canvas, bool bottom, float scale_factor, bool show_axes);
-    //void render_for_picking(GLCanvas3D& canvas, bool bottom, float scale_factor);
+    void render(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor, bool show_axes);
+    //void render_for_picking(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor);
 
     void on_change_color_mode(bool is_dark);
 
@@ -159,13 +159,13 @@ private:
     //BBS: with offset
     void update_bed_triangles();
     static std::tuple<Type, std::string, std::string> detect_type(const Pointfs& shape);
-    void render_internal(GLCanvas3D& canvas, bool bottom, float scale_factor,
+    void render_internal(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, float scale_factor,
         bool show_axes);
     void render_axes();
-    void render_system(GLCanvas3D& canvas, bool bottom);
+    void render_system(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom);
     //void render_texture(bool bottom, GLCanvas3D& canvas);
-    void render_model();
-    void render_custom(GLCanvas3D& canvas, bool bottom);
+    void render_model(const Transform3d& view_matrix, const Transform3d& projection_matrix);
+    void render_custom(GLCanvas3D& canvas, const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom);
     void render_default(bool bottom);
 };
 

src/slic3r/GUI/3DScene.cpp

@@ -6,6 +6,7 @@
 #include "GUI_Colors.hpp"
 #include "Plater.hpp"
 #include "BitmapCache.hpp"
+#include "Camera.hpp"
 
 #include "libslic3r/BuildVolume.hpp"
 #include "libslic3r/ExtrusionEntity.hpp"
@@ -96,10 +97,14 @@ void GLVolume::SinkingContours::render()
 {
     update();
 
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(m_shift.x(), m_shift.y(), m_shift.z()));
+    GLShaderProgram* shader = GUI::wxGetApp().get_current_shader();
+    if (shader == nullptr)
+        return;
+
+    const GUI::Camera& camera = GUI::wxGetApp().plater()->get_camera();
+    shader->set_uniform("view_model_matrix", camera.get_view_matrix() * Geometry::assemble_transform(m_shift));
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
     m_model.render();
-    glsafe(::glPopMatrix());
 }
 
 void GLVolume::SinkingContours::update()
@@ -117,7 +122,7 @@ void GLVolume::SinkingContours::update()
 
             m_model.reset();
             GUI::GLModel::Geometry init_data;
-            init_data.format = { GUI::GLModel::Geometry::EPrimitiveType::Triangles, GUI::GLModel::Geometry::EVertexLayout::P3, GUI::GLModel::Geometry::EIndexType::UINT };
+            init_data.format = { GUI::GLModel::Geometry::EPrimitiveType::Triangles, GUI::GLModel::Geometry::EVertexLayout::P3 };
             init_data.color = ColorRGBA::WHITE();
             unsigned int vertices_counter = 0;
             MeshSlicingParams slicing_params;
@@ -131,7 +136,7 @@ void GLVolume::SinkingContours::update()
                     init_data.add_vertex((Vec3f)(v.cast<float>() + 0.015f * Vec3f::UnitZ())); // add a small positive z to avoid z-fighting
                     ++vertices_counter;
                     if (vertices_counter % 3 == 0)
-                        init_data.add_uint_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
+                        init_data.add_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
                 }
             }
             m_model.init_from(std::move(init_data));
@@ -398,10 +403,17 @@ void GLVolume::render(bool with_outline)
     if (!is_active)
         return;
 
+    GLShaderProgram* shader = GUI::wxGetApp().get_current_shader();
+    if (shader == nullptr)
+        return;
+
     if (this->is_left_handed())
         glFrontFace(GL_CW);
     glsafe(::glCullFace(GL_BACK));
-    glsafe(::glPushMatrix());
+    if (with_outline) {
+        // Error: not supported!
+        throw Slic3r::InvalidArgument("Render GLVolume with outline is not supported");
+    }
 
     // BBS: add logic for mmu segmentation rendering
     auto render_body = [&]() {
@@ -446,7 +458,6 @@ void GLVolume::render(bool with_outline)
                 for (int index = 0; index < colors.size(); index++)
                     colors[index].a(render_color.a());
             }
-            glsafe(::glMultMatrixd(world_matrix().data()));
             for (int idx = 0; idx < mmuseg_models.size(); idx++) {
                 GUI::GLModel &m = mmuseg_models[idx];
                 if (m.is_empty())
@@ -489,7 +500,6 @@ void GLVolume::render(bool with_outline)
             }
         }
         else {
-            glsafe(::glMultMatrixd(world_matrix().data()));
             if (tverts_range == std::make_pair<size_t, size_t>(0, -1))
                 model.render();
             else
@@ -498,7 +508,6 @@ void GLVolume::render(bool with_outline)
     };
 
     //BBS: add logic of outline rendering
-    GLShaderProgram* shader = GUI::wxGetApp().get_current_shader();
     //BOOST_LOG_TRIVIAL(info) << boost::format(": %1%, with_outline %2%, shader %3%.")%__LINE__ %with_outline %shader;
     if (with_outline && shader != nullptr)
     {
@@ -629,7 +638,6 @@ void GLVolume::render(bool with_outline)
         render_body();
         //BOOST_LOG_TRIVIAL(info) << boost::format(": %1%, normal render.")%__LINE__;
     }
-    glsafe(::glPopMatrix());
     if (this->is_left_handed())
         glFrontFace(GL_CCW);
 }
@@ -640,7 +648,6 @@ void GLVolume::simple_render(GLShaderProgram* shader, ModelObjectPtrs& model_obj
     if (this->is_left_handed())
         glFrontFace(GL_CW);
     glsafe(::glCullFace(GL_BACK));
-    glsafe(::glPushMatrix());
 
     bool color_volume = false;
     ModelObject* model_object = nullptr;
@@ -704,16 +711,12 @@ void GLVolume::simple_render(GLShaderProgram* shader, ModelObjectPtrs& model_obj
             else
                 m.render(this->tverts_range);
         }
-    }
-    else {
-        glsafe(::glMultMatrixd(world_matrix().data()));
+    } else {
         if (tverts_range == std::make_pair<size_t, size_t>(0, -1))
             model.render();
         else
             model.render(this->tverts_range);
     }
-
-    glsafe(::glPopMatrix());
     if (this->is_left_handed())
         glFrontFace(GL_CCW);
 }
@@ -997,8 +1000,8 @@ int GLVolumeCollection::get_selection_support_threshold_angle(bool &enable_suppo
 }
 
 //BBS: add outline drawing logic
-void GLVolumeCollection::render(
-    GLVolumeCollection::ERenderType type, bool disable_cullface, const Transform3d &view_matrix, std::function<bool(const GLVolume &)> filter_func, bool with_outline) const
+void GLVolumeCollection::render(GLVolumeCollection::ERenderType type, bool disable_cullface, const Transform3d& view_matrix, const Transform3d& projection_matrix,
+    std::function<bool(const GLVolume&)> filter_func, bool with_outline) const
 {
     GLVolumeWithIdAndZList to_render = volumes_to_render(volumes, type, view_matrix, filter_func);
     if (to_render.empty())
@@ -1008,8 +1011,9 @@ void GLVolumeCollection::render(
     if (shader == nullptr)
         return;
 
-    GLShaderProgram* sink_shader  = GUI::wxGetApp().get_shader("flat");
-    GLShaderProgram* edges_shader = GUI::wxGetApp().get_shader("flat");
+    GLShaderProgram* sink_shader = GUI::wxGetApp().get_shader("flat_attr");
+    GLShaderProgram* edges_shader = GUI::wxGetApp().get_shader("flat_attr");
+    assert(boost::algorithm::iends_with(shader->get_name(), "_attr"));
 
     if (type == ERenderType::Transparent) {
         glsafe(::glEnable(GL_BLEND));
@@ -1049,9 +1053,6 @@ void GLVolumeCollection::render(
         }
         shader->start_using();
 
-        glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
-        glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
-
         if (!volume.first->model.is_initialized())
             shader->set_uniform("uniform_color", volume.first->render_color);
         shader->set_uniform("z_range", m_z_range, 2);
@@ -1096,6 +1097,10 @@ void GLVolumeCollection::render(
         glcheck();
 
         volume.first->model.set_color(volume.first->render_color);
+        const Transform3d matrix = view_matrix * volume.first->world_matrix();
+        shader->set_uniform("view_model_matrix", matrix);
+        shader->set_uniform("projection_matrix", projection_matrix);
+        shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         //BBS: add outline related logic
         volume.first->render(with_outline && volume.first->selected);
 
@@ -1106,9 +1111,6 @@ void GLVolumeCollection::render(
 
         glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
         glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
-
-        glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
-        glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
     }
 
     if (m_show_sinking_contours) {
@@ -1462,8 +1464,8 @@ static void thick_lines_to_geometry(
 
         if (!is_first && bottom_z_different) {
             // Found a change of the layer thickness -> Add a cap at the end of the previous segment.
-            geometry.add_uint_triangle(idx_b[Bottom], idx_b[Left], idx_b[Top]);
-            geometry.add_uint_triangle(idx_b[Bottom], idx_b[Top], idx_b[Right]);
+            geometry.add_triangle(idx_b[Bottom], idx_b[Left], idx_b[Top]);
+            geometry.add_triangle(idx_b[Bottom], idx_b[Top], idx_b[Right]);
         }
 
         // Share top / bottom vertices if possible.
@@ -1513,13 +1515,13 @@ static void thick_lines_to_geometry(
                     geometry.add_vertex(Vec3f(a2.x(), a2.y(), middle_z), Vec3f(-xy_right_normal.x(), -xy_right_normal.y(), 0.0f));
                     if (cross2(v_prev, v) > 0.0) {
                         // Right turn. Fill in the right turn wedge.
-                        geometry.add_uint_triangle(idx_prev[Right], idx_a[Right], idx_prev[Top]);
-                        geometry.add_uint_triangle(idx_prev[Right], idx_prev[Bottom], idx_a[Right]);
+                        geometry.add_triangle(idx_prev[Right], idx_a[Right], idx_prev[Top]);
+                        geometry.add_triangle(idx_prev[Right], idx_prev[Bottom], idx_a[Right]);
                     }
                     else {
                         // Left turn. Fill in the left turn wedge.
-                        geometry.add_uint_triangle(idx_prev[Left], idx_prev[Top], idx_a[Left]);
-                        geometry.add_uint_triangle(idx_prev[Left], idx_a[Left], idx_prev[Bottom]);
+                        geometry.add_triangle(idx_prev[Left], idx_prev[Top], idx_a[Left]);
+                        geometry.add_triangle(idx_prev[Left], idx_a[Left], idx_prev[Bottom]);
                     }
                 }
             }
@@ -1541,11 +1543,11 @@ static void thick_lines_to_geometry(
                         // Replace the left / right vertex indices to point to the start of the loop.
                         const size_t indices_count = geometry.indices_count();
                         for (size_t u = indices_count - 24; u < indices_count; ++u) {
-                            const unsigned int id = geometry.extract_uint_index(u);
+                            const unsigned int id = geometry.extract_index(u);
                             if (id == (unsigned int)idx_prev[Left])
-                                geometry.set_uint_index(u, (unsigned int)idx_initial[Left]);
+                                geometry.set_index(u, (unsigned int)idx_initial[Left]);
                             else if (id == (unsigned int)idx_prev[Right])
-                                geometry.set_uint_index(u, (unsigned int)idx_initial[Right]);
+                                geometry.set_index(u, (unsigned int)idx_initial[Right]);
                         }
                     }
                 }
@@ -1582,36 +1584,36 @@ static void thick_lines_to_geometry(
 
         if (bottom_z_different && (closed || (!is_first && !is_last))) {
             // Found a change of the layer thickness -> Add a cap at the beginning of this segment.
-            geometry.add_uint_triangle(idx_a[Bottom], idx_a[Right], idx_a[Top]);
-            geometry.add_uint_triangle(idx_a[Bottom], idx_a[Top], idx_a[Left]);
+            geometry.add_triangle(idx_a[Bottom], idx_a[Right], idx_a[Top]);
+            geometry.add_triangle(idx_a[Bottom], idx_a[Top], idx_a[Left]);
         }
 
         if (!closed) {
             // Terminate open paths with caps.
             if (is_first) {
-                geometry.add_uint_triangle(idx_a[Bottom], idx_a[Right], idx_a[Top]);
-                geometry.add_uint_triangle(idx_a[Bottom], idx_a[Top], idx_a[Left]);
+                geometry.add_triangle(idx_a[Bottom], idx_a[Right], idx_a[Top]);
+                geometry.add_triangle(idx_a[Bottom], idx_a[Top], idx_a[Left]);
             }
             // We don't use 'else' because both cases are true if we have only one line.
             if (is_last) {
-                geometry.add_uint_triangle(idx_b[Bottom], idx_b[Left], idx_b[Top]);
-                geometry.add_uint_triangle(idx_b[Bottom], idx_b[Top], idx_b[Right]);
+                geometry.add_triangle(idx_b[Bottom], idx_b[Left], idx_b[Top]);
+                geometry.add_triangle(idx_b[Bottom], idx_b[Top], idx_b[Right]);
             }
         }
 
         // Add quads for a straight hollow tube-like segment.
         // bottom-right face
-        geometry.add_uint_triangle(idx_a[Bottom], idx_b[Bottom], idx_b[Right]);
-        geometry.add_uint_triangle(idx_a[Bottom], idx_b[Right], idx_a[Right]);
+        geometry.add_triangle(idx_a[Bottom], idx_b[Bottom], idx_b[Right]);
+        geometry.add_triangle(idx_a[Bottom], idx_b[Right], idx_a[Right]);
         // top-right face
-        geometry.add_uint_triangle(idx_a[Right], idx_b[Right], idx_b[Top]);
-        geometry.add_uint_triangle(idx_a[Right], idx_b[Top], idx_a[Top]);
+        geometry.add_triangle(idx_a[Right], idx_b[Right], idx_b[Top]);
+        geometry.add_triangle(idx_a[Right], idx_b[Top], idx_a[Top]);
         // top-left face
-        geometry.add_uint_triangle(idx_a[Top], idx_b[Top], idx_b[Left]);
-        geometry.add_uint_triangle(idx_a[Top], idx_b[Left], idx_a[Left]);
+        geometry.add_triangle(idx_a[Top], idx_b[Top], idx_b[Left]);
+        geometry.add_triangle(idx_a[Top], idx_b[Left], idx_a[Left]);
         // bottom-left face
-        geometry.add_uint_triangle(idx_a[Left], idx_b[Left], idx_b[Bottom]);
-        geometry.add_uint_triangle(idx_a[Left], idx_b[Bottom], idx_a[Bottom]);
+        geometry.add_triangle(idx_a[Left], idx_b[Left], idx_b[Bottom]);
+        geometry.add_triangle(idx_a[Left], idx_b[Bottom], idx_a[Bottom]);
     }
 }
 
@@ -1751,13 +1753,13 @@ static void thick_lines_to_geometry(
 
                 if (is_right_turn) {
                     // Right turn. Fill in the right turn wedge.
-                    geometry.add_uint_triangle(idx_prev[Right], idx_a[Right], idx_prev[Top]);
-                    geometry.add_uint_triangle(idx_prev[Right], idx_prev[Bottom], idx_a[Right]);
+                    geometry.add_triangle(idx_prev[Right], idx_a[Right], idx_prev[Top]);
+                    geometry.add_triangle(idx_prev[Right], idx_prev[Bottom], idx_a[Right]);
                 }
                 else {
                     // Left turn. Fill in the left turn wedge.
-                    geometry.add_uint_triangle(idx_prev[Left], idx_prev[Top], idx_a[Left]);
-                    geometry.add_uint_triangle(idx_prev[Left], idx_a[Left], idx_prev[Bottom]);
+                    geometry.add_triangle(idx_prev[Left], idx_prev[Top], idx_a[Left]);
+                    geometry.add_triangle(idx_prev[Left], idx_a[Left], idx_prev[Bottom]);
                 }
             }
             else {
@@ -1776,11 +1778,11 @@ static void thick_lines_to_geometry(
                     // Replace the left / right vertex indices to point to the start of the loop.
                     const size_t indices_count = geometry.indices_count();
                     for (size_t u = indices_count - 24; u < indices_count; ++u) {
-                        const unsigned int id = geometry.extract_uint_index(u);
+                        const unsigned int id = geometry.extract_index(u);
                         if (id == (unsigned int)idx_prev[Left])
-                            geometry.set_uint_index(u, (unsigned int)idx_initial[Left]);
+                            geometry.set_index(u, (unsigned int)idx_initial[Left]);
                         else if (id == (unsigned int)idx_prev[Right])
-                            geometry.set_uint_index(u, (unsigned int)idx_initial[Right]);
+                            geometry.set_index(u, (unsigned int)idx_initial[Right]);
                     }
                 }
 
@@ -1819,30 +1821,30 @@ static void thick_lines_to_geometry(
         if (!closed) {
             // Terminate open paths with caps.
             if (i == 0) {
-                geometry.add_uint_triangle(idx_a[Bottom], idx_a[Right], idx_a[Top]);
-                geometry.add_uint_triangle(idx_a[Bottom], idx_a[Top], idx_a[Left]);
+                geometry.add_triangle(idx_a[Bottom], idx_a[Right], idx_a[Top]);
+                geometry.add_triangle(idx_a[Bottom], idx_a[Top], idx_a[Left]);
             }
 
             // We don't use 'else' because both cases are true if we have only one line.
             if (i + 1 == lines.size()) {
-                geometry.add_uint_triangle(idx_b[Bottom], idx_b[Left], idx_b[Top]);
-                geometry.add_uint_triangle(idx_b[Bottom], idx_b[Top], idx_b[Right]);
+                geometry.add_triangle(idx_b[Bottom], idx_b[Left], idx_b[Top]);
+                geometry.add_triangle(idx_b[Bottom], idx_b[Top], idx_b[Right]);
             }
         }
 
         // Add quads for a straight hollow tube-like segment.
         // bottom-right face
-        geometry.add_uint_triangle(idx_a[Bottom], idx_b[Bottom], idx_b[Right]);
-        geometry.add_uint_triangle(idx_a[Bottom], idx_b[Right], idx_a[Right]);
+        geometry.add_triangle(idx_a[Bottom], idx_b[Bottom], idx_b[Right]);
+        geometry.add_triangle(idx_a[Bottom], idx_b[Right], idx_a[Right]);
         // top-right face
-        geometry.add_uint_triangle(idx_a[Right], idx_b[Right], idx_b[Top]);
-        geometry.add_uint_triangle(idx_a[Right], idx_b[Top], idx_a[Top]);
+        geometry.add_triangle(idx_a[Right], idx_b[Right], idx_b[Top]);
+        geometry.add_triangle(idx_a[Right], idx_b[Top], idx_a[Top]);
         // top-left face
-        geometry.add_uint_triangle(idx_a[Top], idx_b[Top], idx_b[Left]);
-        geometry.add_uint_triangle(idx_a[Top], idx_b[Left], idx_a[Left]);
+        geometry.add_triangle(idx_a[Top], idx_b[Top], idx_b[Left]);
+        geometry.add_triangle(idx_a[Top], idx_b[Left], idx_a[Left]);
         // bottom-left face
-        geometry.add_uint_triangle(idx_a[Left], idx_b[Left], idx_b[Bottom]);
-        geometry.add_uint_triangle(idx_a[Left], idx_b[Bottom], idx_a[Bottom]);
+        geometry.add_triangle(idx_a[Left], idx_b[Left], idx_b[Bottom]);
+        geometry.add_triangle(idx_a[Left], idx_b[Bottom], idx_a[Bottom]);
     }
 }
 

src/slic3r/GUI/3DScene.hpp

@@ -446,11 +446,8 @@ public:
     int get_selection_support_threshold_angle(bool&) const;
     // Render the volumes by OpenGL.
     //BBS: add outline drawing logic
-    void render(ERenderType                           type,
-                bool                                  disable_cullface,
-                const Transform3d &                   view_matrix,
-                std::function<bool(const GLVolume &)> filter_func  = std::function<bool(const GLVolume &)>(),
-                bool with_outline = true) const;
+    void render(ERenderType type, bool disable_cullface, const Transform3d& view_matrix, const Transform3d& projection_matrix,
+                std::function<bool(const GLVolume &)> filter_func  = std::function<bool(const GLVolume &)>(), bool with_outline = true) const;
 
     // Clear the geometry
     void clear() { for (auto *v : volumes) delete v; volumes.clear(); }

src/slic3r/GUI/Camera.hpp

@@ -92,7 +92,6 @@ public:
     const std::array<int, 4>& get_viewport() const { return m_viewport; }
     const Transform3d& get_view_matrix() const { return m_view_matrix; }
     const Transform3d& get_projection_matrix() const { return m_projection_matrix; }
-    Transform3d get_projection_view_matrix() const { return m_projection_matrix * m_view_matrix; }
 
     //BBS
     const Eigen::Quaterniond& get_view_rotation() const {return m_view_rotation; }

src/slic3r/GUI/GCodeViewer.cpp

@@ -307,7 +307,7 @@ void GCodeViewer::SequentialView::Marker::render(int canvas_width, int canvas_he
     if (!m_visible)
         return;
 
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
+    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
     if (shader == nullptr)
         return;
 
@@ -317,13 +317,14 @@ void GCodeViewer::SequentialView::Marker::render(int canvas_width, int canvas_he
     shader->start_using();
     shader->set_uniform("emission_factor", 0.0f);
 
-    glsafe(::glPushMatrix());
-    glsafe(::glMultMatrixf(m_world_transform.data()));
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d matrix = camera.get_view_matrix() * m_world_transform.cast<double>();
+    shader->set_uniform("view_model_matrix", matrix);
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+    shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
 
     m_model.render();
 
-    glsafe(::glPopMatrix());
-
     shader->stop_using();
 
     glsafe(::glDisable(GL_BLEND));
@@ -787,7 +788,7 @@ void GCodeViewer::init(ConfigOptionMode mode, PresetBundle* preset_bundle)
         case EMoveType::Seam: {
 //            if (wxGetApp().is_gl_version_greater_or_equal_to(3, 3)) {
 //                buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::InstancedModel;
-//                buffer.shader = "gouraud_light_instanced";
+//                buffer.shader = "gouraud_light_instanced_attr";
 //                buffer.model.model.init_from(diamond(16));
 //                buffer.model.color = option_color(type);
 //                buffer.model.instances.format = InstanceVBuffer::EFormat::InstancedModel;
@@ -798,7 +799,7 @@ void GCodeViewer::init(ConfigOptionMode mode, PresetBundle* preset_bundle)
 
                 buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::BatchedModel;
                 buffer.vertices.format = VBuffer::EFormat::PositionNormal3;
-                buffer.shader = "gouraud_light";
+                buffer.shader = "gouraud_light_attr";
 
                 buffer.model.data = diamond(16);
                 buffer.model.color = option_color(type);
@@ -810,13 +811,13 @@ void GCodeViewer::init(ConfigOptionMode mode, PresetBundle* preset_bundle)
         case EMoveType::Extrude: {
             buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Triangle;
             buffer.vertices.format = VBuffer::EFormat::PositionNormal3;
-            buffer.shader = "gouraud_light";
+            buffer.shader = "gouraud_light_attr";
             break;
         }
         case EMoveType::Travel: {
             buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Line;
-            buffer.vertices.format = VBuffer::EFormat::PositionNormal3;
-            buffer.shader = "toolpaths_lines";
+            buffer.vertices.format = VBuffer::EFormat::Position;
+            buffer.shader = "flat_attr";
             break;
         }
         }
@@ -1324,7 +1325,7 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
             // Some OpenGL drivers crash on empty glMultiDrawElements, see GH #7415.
             assert(!path.sizes.empty());
             assert(!path.offsets.empty());
-            glsafe(::glUniform4fv(uniform_color, 1, static_cast<const GLfloat*>(path.color.data())));
+            shader.set_uniform(uniform_color, path.color);
             glsafe(::glMultiDrawElements(GL_TRIANGLES, (const GLsizei*)path.sizes.data(), GL_UNSIGNED_SHORT, (const void* const*)path.offsets.data(), (GLsizei)path.sizes.size()));
 #if ENABLE_GCODE_VIEWER_STATISTICS
             ++m_statistics.gl_multi_triangles_calls_count;
@@ -1359,7 +1360,7 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
 #if ENABLE_GCODE_VIEWER_STATISTICS
     auto render_as_batched_model = [this](TBuffer& buffer, GLShaderProgram& shader) {
 #else
-    auto render_as_batched_model = [](TBuffer& buffer, GLShaderProgram& shader) {
+    auto render_as_batched_model = [](TBuffer& buffer, GLShaderProgram& shader, int position_id, int normal_id) {
 #endif // ENABLE_GCODE_VIEWER_STATISTICS
 
         struct Range
@@ -1375,12 +1376,16 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
             const IBuffer& i_buffer = buffer.indices[j];
             buffer_range.last = buffer_range.first + i_buffer.count / indices_per_instance;
             glsafe(::glBindBuffer(GL_ARRAY_BUFFER, i_buffer.vbo));
-            glsafe(::glVertexPointer(buffer.vertices.position_size_floats(), GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
-            glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
+            if (position_id != -1) {
+                glsafe(::glVertexAttribPointer(position_id, buffer.vertices.position_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
+                glsafe(::glEnableVertexAttribArray(position_id));
+            }
             bool has_normals = buffer.vertices.normal_size_floats() > 0;
             if (has_normals) {
-                glsafe(::glNormalPointer(GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
-                glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
+                if (normal_id != -1) {
+                    glsafe(::glVertexAttribPointer(normal_id, buffer.vertices.normal_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
+                    glsafe(::glEnableVertexAttribArray(normal_id));
+                }
             }
 
             glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, i_buffer.ibo));
@@ -1404,10 +1409,10 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
 
             glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
             
-            if (has_normals)
-                glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
-
-            glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
+            if (normal_id != -1)
+                glsafe(::glDisableVertexAttribArray(normal_id));
+            if (position_id != -1)
+                glsafe(::glDisableVertexAttribArray(position_id));
             glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
 
             buffer_range.first = buffer_range.last;
@@ -1423,10 +1428,15 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
         if (!buffer.visible || !buffer.has_data())
             continue;
 
-        GLShaderProgram* shader = opengl_manager.get_shader("cali");
+        GLShaderProgram* shader = opengl_manager.get_shader("flat_attr");
         if (shader != nullptr) {
             shader->start_using();
 
+            shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+            shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+            int position_id = shader->get_attrib_location("v_position");
+            int normal_id   = shader->get_attrib_location("v_normal");
+
             if (buffer.render_primitive_type == TBuffer::ERenderPrimitiveType::InstancedModel) {
                 //shader->set_uniform("emission_factor", 0.25f);
                 render_as_instanced_model(buffer, *shader);
@@ -1434,7 +1444,7 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
             }
             else if (buffer.render_primitive_type == TBuffer::ERenderPrimitiveType::BatchedModel) {
                 //shader->set_uniform("emission_factor", 0.25f);
-                render_as_batched_model(buffer, *shader);
+                render_as_batched_model(buffer, *shader, position_id, normal_id);
                 //shader->set_uniform("emission_factor", 0.0f);
             }
             else {
@@ -1452,12 +1462,16 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
                         continue;
 
                     glsafe(::glBindBuffer(GL_ARRAY_BUFFER, i_buffer.vbo));
-                    glsafe(::glVertexPointer(buffer.vertices.position_size_floats(), GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
-                    glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
+                    if (position_id != -1) {
+                        glsafe(::glVertexAttribPointer(position_id, buffer.vertices.position_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
+                        glsafe(::glEnableVertexAttribArray(position_id));
+                    }
                     bool has_normals = false;// buffer.vertices.normal_size_floats() > 0;
                     if (has_normals) {
-                        glsafe(::glNormalPointer(GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
-                        glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
+                        if (normal_id != -1) {
+                            glsafe(::glVertexAttribPointer(normal_id, buffer.vertices.normal_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
+                            glsafe(::glEnableVertexAttribArray(normal_id));
+                        }
                     }
 
                     glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, i_buffer.ibo));
@@ -1474,10 +1488,11 @@ void GCodeViewer::_render_calibration_thumbnail_internal(ThumbnailData& thumbnai
 
                     glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
                     
-                    if (has_normals)
-                        glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
+                    if (normal_id != -1)
+                        glsafe(::glDisableVertexAttribArray(normal_id));
+                    if (position_id != -1)
+                        glsafe(::glDisableVertexAttribArray(position_id));
 
-                    glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
                     glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
                 }
             }
@@ -2032,15 +2047,11 @@ void GCodeViewer::load_toolpaths(const GCodeProcessorResult& gcode_result, const
 
     // format data into the buffers to be rendered as lines
     auto add_vertices_as_line = [](const GCodeProcessorResult::MoveVertex& prev, const GCodeProcessorResult::MoveVertex& curr, VertexBuffer& vertices) {
-        auto add_vertex = [&vertices](const Vec3f& position, const Vec3f& normal) {
+        auto add_vertex = [&vertices](const Vec3f& position) {
             // add position
             vertices.push_back(position.x());
             vertices.push_back(position.y());
             vertices.push_back(position.z());
-            // add normal
-            vertices.push_back(normal.x());
-            vertices.push_back(normal.y());
-            vertices.push_back(normal.z());
         };
         // x component of the normal to the current segment (the normal is parallel to the XY plane)
         //BBS: Has modified a lot for this function to support arc move
@@ -2048,13 +2059,10 @@ void GCodeViewer::load_toolpaths(const GCodeProcessorResult& gcode_result, const
         for (size_t i = 0; i < loop_num + 1; i++) {
             const Vec3f &previous = (i == 0? prev.position : curr.interpolation_points[i-1]);
             const Vec3f &current = (i == loop_num? curr.position : curr.interpolation_points[i]);
-            const Vec3f dir = (current - previous).normalized();
-            Vec3f normal(dir.y(), -dir.x(), 0.0);
-            normal.normalize();
             // add previous vertex
-            add_vertex(previous, normal);
+            add_vertex(previous);
             // add current vertex
-            add_vertex(current, normal);
+            add_vertex(current);
         }
     };
     //BBS: modify a lot to support arc travel
@@ -2325,7 +2333,7 @@ void GCodeViewer::load_toolpaths(const GCodeProcessorResult& gcode_result, const
     auto add_indices_as_model_batch = [](const GLModel::Geometry& data, IndexBuffer& indices, IBufferType base_index) {
         const size_t indices_count = data.indices_count();
         for (size_t i = 0; i < indices_count; ++i) {
-            indices.push_back(static_cast<IBufferType>(data.extract_ushort_index(i) + base_index));
+            indices.push_back(static_cast<IBufferType>(data.extract_index(i) + base_index));
         }
     };
 
@@ -3765,15 +3773,14 @@ m_no_render_path = false;
 void GCodeViewer::render_toolpaths()
 {
 #if ENABLE_FIXED_SCREEN_SIZE_POINT_MARKERS
-    float point_size = 20.0f;
+    const float point_size = 20.0f;
 #else
-    float point_size = 0.8f;
+    const float point_size = 0.8f;
 #endif // ENABLE_FIXED_SCREEN_SIZE_POINT_MARKERS
-    std::array<float, 4> light_intensity = { 0.25f, 0.70f, 0.75f, 0.75f };
     const Camera& camera = wxGetApp().plater()->get_camera();
-    double zoom = camera.get_zoom();
+    const double zoom = camera.get_zoom();
     const std::array<int, 4>& viewport = camera.get_viewport();
-    float near_plane_height = camera.get_type() == Camera::EType::Perspective ? static_cast<float>(viewport[3]) / (2.0f * static_cast<float>(2.0 * std::tan(0.5 * Geometry::deg2rad(camera.get_fov())))) :
+    const float near_plane_height = camera.get_type() == Camera::EType::Perspective ? static_cast<float>(viewport[3]) / (2.0f * static_cast<float>(2.0 * std::tan(0.5 * Geometry::deg2rad(camera.get_fov())))) :
         static_cast<float>(viewport[3]) * 0.0005;
 
     auto shader_init_as_points = [zoom, point_size, near_plane_height](GLShaderProgram& shader) {
@@ -3793,7 +3800,7 @@ void GCodeViewer::render_toolpaths()
 #if ENABLE_GCODE_VIEWER_STATISTICS
         this
 #endif // ENABLE_GCODE_VIEWER_STATISTICS
-    ](std::vector<RenderPath>::reverse_iterator it_path, std::vector<RenderPath>::reverse_iterator it_end, GLShaderProgram& shader, int uniform_color) {
+    ](std::vector<RenderPath>::iterator it_path, std::vector<RenderPath>::iterator it_end, GLShaderProgram& shader, int uniform_color) {
         glsafe(::glEnable(GL_VERTEX_PROGRAM_POINT_SIZE));
         glsafe(::glEnable(GL_POINT_SPRITE));
 
@@ -3802,7 +3809,7 @@ void GCodeViewer::render_toolpaths()
             // Some OpenGL drivers crash on empty glMultiDrawElements, see GH #7415.
             assert(! path.sizes.empty());
             assert(! path.offsets.empty());
-            glsafe(::glUniform4fv(uniform_color, 1, static_cast<const GLfloat*>(path.color.data())));
+            shader.set_uniform(uniform_color, path.color);
             glsafe(::glMultiDrawElements(GL_POINTS, (const GLsizei*)path.sizes.data(), GL_UNSIGNED_SHORT, (const void* const*)path.offsets.data(), (GLsizei)path.sizes.size()));
 #if ENABLE_GCODE_VIEWER_STATISTICS
             ++m_statistics.gl_multi_points_calls_count;
@@ -3813,20 +3820,17 @@ void GCodeViewer::render_toolpaths()
         glsafe(::glDisable(GL_VERTEX_PROGRAM_POINT_SIZE));
     };
 
-    auto shader_init_as_lines = [light_intensity](GLShaderProgram &shader) {
-        shader.set_uniform("light_intensity", light_intensity);
-    };
     auto render_as_lines = [
 #if ENABLE_GCODE_VIEWER_STATISTICS
         this
 #endif // ENABLE_GCODE_VIEWER_STATISTICS
-    ](std::vector<RenderPath>::reverse_iterator it_path, std::vector<RenderPath>::reverse_iterator it_end, GLShaderProgram& shader, int uniform_color) {
+    ](std::vector<RenderPath>::iterator it_path, std::vector<RenderPath>::iterator it_end, GLShaderProgram& shader, int uniform_color) {
         for (auto it = it_path; it != it_end && it_path->ibuffer_id == it->ibuffer_id; ++it) {
             const RenderPath& path = *it;
             // Some OpenGL drivers crash on empty glMultiDrawElements, see GH #7415.
             assert(! path.sizes.empty());
             assert(! path.offsets.empty());
-            glsafe(::glUniform4fv(uniform_color, 1, static_cast<const GLfloat*>(path.color.data())));
+            shader.set_uniform(uniform_color, path.color);
             glsafe(::glMultiDrawElements(GL_LINES, (const GLsizei*)path.sizes.data(), GL_UNSIGNED_SHORT, (const void* const*)path.offsets.data(), (GLsizei)path.sizes.size()));
 #if ENABLE_GCODE_VIEWER_STATISTICS
             ++m_statistics.gl_multi_lines_calls_count;
@@ -3838,13 +3842,13 @@ void GCodeViewer::render_toolpaths()
 #if ENABLE_GCODE_VIEWER_STATISTICS
         this
 #endif // ENABLE_GCODE_VIEWER_STATISTICS
-    ](std::vector<RenderPath>::reverse_iterator it_path, std::vector<RenderPath>::reverse_iterator it_end, GLShaderProgram& shader, int uniform_color) {
+    ](std::vector<RenderPath>::iterator it_path, std::vector<RenderPath>::iterator it_end, GLShaderProgram& shader, int uniform_color) {
         for (auto it = it_path; it != it_end && it_path->ibuffer_id == it->ibuffer_id; ++it) {
             const RenderPath& path = *it;
             // Some OpenGL drivers crash on empty glMultiDrawElements, see GH #7415.
             assert(! path.sizes.empty());
             assert(! path.offsets.empty());
-            glsafe(::glUniform4fv(uniform_color, 1, static_cast<const GLfloat*>(path.color.data())));
+            shader.set_uniform(uniform_color, path.color);
             glsafe(::glMultiDrawElements(GL_TRIANGLES, (const GLsizei*)path.sizes.data(), GL_UNSIGNED_SHORT, (const void* const*)path.offsets.data(), (GLsizei)path.sizes.size()));
 #if ENABLE_GCODE_VIEWER_STATISTICS
             ++m_statistics.gl_multi_triangles_calls_count;
@@ -3877,9 +3881,9 @@ void GCodeViewer::render_toolpaths()
     };
 
 #if ENABLE_GCODE_VIEWER_STATISTICS
-    auto render_as_batched_model = [this](TBuffer& buffer, GLShaderProgram& shader) {
+        auto render_as_batched_model = [this](TBuffer& buffer, GLShaderProgram& shader, int position_id, int normal_id) {
 #else
-    auto render_as_batched_model = [](TBuffer& buffer, GLShaderProgram& shader) {
+        auto render_as_batched_model = [](TBuffer& buffer, GLShaderProgram& shader, int position_id, int normal_id) {
 #endif // ENABLE_GCODE_VIEWER_STATISTICS
 
         struct Range
@@ -3889,30 +3893,34 @@ void GCodeViewer::render_toolpaths()
             bool intersects(const Range& other) const { return (other.last < first || other.first > last) ? false : true; }
         };
         Range buffer_range = { 0, 0 };
-        size_t indices_per_instance = buffer.model.data.indices_count();
+        const size_t indices_per_instance = buffer.model.data.indices_count();
 
         for (size_t j = 0; j < buffer.indices.size(); ++j) {
             const IBuffer& i_buffer = buffer.indices[j];
             buffer_range.last = buffer_range.first + i_buffer.count / indices_per_instance;
             glsafe(::glBindBuffer(GL_ARRAY_BUFFER, i_buffer.vbo));
-            glsafe(::glVertexPointer(buffer.vertices.position_size_floats(), GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
-            glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
-            bool has_normals = buffer.vertices.normal_size_floats() > 0;
+            if (position_id != -1) {
+                glsafe(::glVertexAttribPointer(position_id, buffer.vertices.position_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
+                glsafe(::glEnableVertexAttribArray(position_id));
+            }
+            const bool has_normals = buffer.vertices.normal_size_floats() > 0;
             if (has_normals) {
-                glsafe(::glNormalPointer(GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
-                glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
+                if (normal_id != -1) {
+                    glsafe(::glVertexAttribPointer(normal_id, buffer.vertices.normal_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
+                    glsafe(::glEnableVertexAttribArray(normal_id));
+                }
             }
 
             glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, i_buffer.ibo));
 
             for (auto& range : buffer.model.instances.render_ranges.ranges) {
-                Range range_range = { range.offset, range.offset + range.count };
+                const Range range_range = { range.offset, range.offset + range.count };
                 if (range_range.intersects(buffer_range)) {
                     shader.set_uniform("uniform_color", range.color);
-                    unsigned int offset = (range_range.first > buffer_range.first) ? range_range.first - buffer_range.first : 0;
-                    size_t offset_bytes = static_cast<size_t>(offset) * indices_per_instance * sizeof(IBufferType);
-                    Range render_range = { std::max(range_range.first, buffer_range.first), std::min(range_range.last, buffer_range.last) };
-                    size_t count = static_cast<size_t>(render_range.last - render_range.first) * indices_per_instance;
+                    const unsigned int offset = (range_range.first > buffer_range.first) ? range_range.first - buffer_range.first : 0;
+                    const size_t offset_bytes = static_cast<size_t>(offset) * indices_per_instance * sizeof(IBufferType);
+                    const Range render_range = { std::max(range_range.first, buffer_range.first), std::min(range_range.last, buffer_range.last) };
+                    const size_t count = static_cast<size_t>(render_range.last - render_range.first) * indices_per_instance;
                     if (count > 0) {
                         glsafe(::glDrawElements(GL_TRIANGLES, (GLsizei)count, GL_UNSIGNED_SHORT, (const void*)offset_bytes));
 #if ENABLE_GCODE_VIEWER_STATISTICS
@@ -3924,10 +3932,10 @@ void GCodeViewer::render_toolpaths()
 
             glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
 
-            if (has_normals)
-                glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
-
-            glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
+            if (normal_id != -1)
+                glsafe(::glDisableVertexAttribArray(normal_id));
+            if (position_id != -1)
+                glsafe(::glDisableVertexAttribArray(position_id));
             glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
 
             buffer_range.first = buffer_range.last;
@@ -3938,9 +3946,8 @@ void GCodeViewer::render_toolpaths()
         return (zoom < 5.0) ? 1.0 : (1.0 + 5.0 * (zoom - 5.0) / (100.0 - 5.0));
     };
 
-    unsigned char begin_id = buffer_id(EMoveType::Retract);
-    unsigned char end_id = buffer_id(EMoveType::Count);
-    //BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(":begin_id %1%, end_id %2% ")%(int)begin_id %(int)end_id;
+    const unsigned char begin_id = buffer_id(EMoveType::Retract);
+    const unsigned char end_id   = buffer_id(EMoveType::Count);
 
     for (unsigned char i = begin_id; i < end_id; ++i) {
         TBuffer& buffer = m_buffers[i];
@@ -3948,9 +3955,21 @@ void GCodeViewer::render_toolpaths()
             continue;
 
         GLShaderProgram* shader = wxGetApp().get_shader(buffer.shader.c_str());
-        if (shader != nullptr) {
+        if (shader == nullptr)
+            continue;
+
         shader->start_using();
 
+        int position_id = -1;
+        int normal_id = -1;
+        const Transform3d& view_matrix = camera.get_view_matrix();
+        shader->set_uniform("view_model_matrix", view_matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        shader->set_uniform("normal_matrix", (Matrix3d)view_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
+
+        position_id = shader->get_attrib_location("v_position");
+        normal_id   = shader->get_attrib_location("v_normal");
+
         if (buffer.render_primitive_type == TBuffer::ERenderPrimitiveType::InstancedModel) {
             shader->set_uniform("emission_factor", 0.25f);
             render_as_instanced_model(buffer, *shader);
@@ -3958,35 +3977,34 @@ void GCodeViewer::render_toolpaths()
         }
         else if (buffer.render_primitive_type == TBuffer::ERenderPrimitiveType::BatchedModel) {
             shader->set_uniform("emission_factor", 0.25f);
-                render_as_batched_model(buffer, *shader);
+            render_as_batched_model(buffer, *shader, position_id, normal_id);
             shader->set_uniform("emission_factor", 0.0f);
         }
         else {
-                switch (buffer.render_primitive_type) {
-                case TBuffer::ERenderPrimitiveType::Point: shader_init_as_points(*shader); break;
-                case TBuffer::ERenderPrimitiveType::Line:  shader_init_as_lines(*shader); break;
-                default: break;
-                }
-                int uniform_color = shader->get_uniform_location("uniform_color");
-                auto it_path = buffer.render_paths.rbegin();
-                //BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(":buffer indices size %1%, render_path size %2% ")%buffer.indices.size() %buffer.render_paths.size();
-                unsigned int indices_count = static_cast<unsigned int>(buffer.indices.size());
-                for (unsigned int index = 0; index < indices_count; ++index) {
-                    unsigned int ibuffer_id = indices_count - index - 1;
+            if (buffer.render_primitive_type == TBuffer::ERenderPrimitiveType::Point)
+                shader_init_as_points(*shader);
+            const int uniform_color = shader->get_uniform_location("uniform_color");
+
+            auto it_path = buffer.render_paths.begin();
+            for (unsigned int ibuffer_id = 0; ibuffer_id < static_cast<unsigned int>(buffer.indices.size()); ++ibuffer_id) {
                 const IBuffer& i_buffer = buffer.indices[ibuffer_id];
                 // Skip all paths with ibuffer_id < ibuffer_id.
-                    for (; it_path != buffer.render_paths.rend() && it_path->ibuffer_id > ibuffer_id; ++ it_path) ;
-                    if (it_path == buffer.render_paths.rend() || it_path->ibuffer_id < ibuffer_id)
+                for (; it_path != buffer.render_paths.end() && it_path->ibuffer_id < ibuffer_id; ++it_path);
+                if (it_path == buffer.render_paths.end() || it_path->ibuffer_id > ibuffer_id)
                     // Not found. This shall not happen.
                     continue;
 
                 glsafe(::glBindBuffer(GL_ARRAY_BUFFER, i_buffer.vbo));
-                    glsafe(::glVertexPointer(buffer.vertices.position_size_floats(), GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
-                    glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
-                    bool has_normals = buffer.vertices.normal_size_floats() > 0;
+                if (position_id != -1) {
+                    glsafe(::glVertexAttribPointer(position_id, buffer.vertices.position_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.position_offset_bytes()));
+                    glsafe(::glEnableVertexAttribArray(position_id));
+                }
+                const bool has_normals = buffer.vertices.normal_size_floats() > 0;
                 if (has_normals) {
-                        glsafe(::glNormalPointer(GL_FLOAT, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
-                        glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
+                    if (normal_id != -1) {
+                        glsafe(::glVertexAttribPointer(normal_id, buffer.vertices.normal_size_floats(), GL_FLOAT, GL_FALSE, buffer.vertices.vertex_size_bytes(), (const void*)buffer.vertices.normal_offset_bytes()));
+                        glsafe(::glEnableVertexAttribArray(normal_id));
+                    }
                 }
 
                 glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, i_buffer.ibo));
@@ -3995,16 +4013,16 @@ void GCodeViewer::render_toolpaths()
                 switch (buffer.render_primitive_type)
                 {
                 case TBuffer::ERenderPrimitiveType::Point: {
-                        render_as_points(it_path, buffer.render_paths.rend(), *shader, uniform_color);
+                    render_as_points(it_path, buffer.render_paths.end(), *shader, uniform_color);
                     break;
                 }
                 case TBuffer::ERenderPrimitiveType::Line: {
                     glsafe(::glLineWidth(static_cast<GLfloat>(line_width(zoom))));
-                        render_as_lines(it_path, buffer.render_paths.rend(), *shader, uniform_color);
+                    render_as_lines(it_path, buffer.render_paths.end(), *shader, uniform_color);
                     break;
                 }
                 case TBuffer::ERenderPrimitiveType::Triangle: {
-                        render_as_triangles(it_path, buffer.render_paths.rend(), *shader, uniform_color);
+                    render_as_triangles(it_path, buffer.render_paths.end(), *shader, uniform_color);
                     break;
                 }
                 default: { break; }
@@ -4012,17 +4030,16 @@ void GCodeViewer::render_toolpaths()
 
                 glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
 
-                    if (has_normals)
-                        glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
-
-                    glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
+                if (normal_id != -1)
+                    glsafe(::glDisableVertexAttribArray(normal_id));
+                if (position_id != -1)
+                    glsafe(::glDisableVertexAttribArray(position_id));
                 glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
             }
         }
 
         shader->stop_using();
     }
-    }
 
 #if ENABLE_GCODE_VIEWER_STATISTICS
     auto render_sequential_range_cap = [this]
@@ -4030,17 +4047,35 @@ void GCodeViewer::render_toolpaths()
     auto render_sequential_range_cap = []
 #endif // ENABLE_GCODE_VIEWER_STATISTICS
     (const SequentialRangeCap& cap) {
-        GLShaderProgram* shader = wxGetApp().get_shader(cap.buffer->shader.c_str());
-        if (shader != nullptr) {
+        const TBuffer* buffer = cap.buffer;
+        GLShaderProgram* shader = wxGetApp().get_shader(buffer->shader.c_str());
+        if (shader == nullptr)
+            return;
+
         shader->start_using();
 
+        int position_id = -1;
+        int normal_id = -1;
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d& view_matrix = camera.get_view_matrix();
+        shader->set_uniform("view_model_matrix", view_matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        shader->set_uniform("normal_matrix", (Matrix3d)view_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
+
+        position_id = shader->get_attrib_location("v_position");
+        normal_id   = shader->get_attrib_location("v_normal");
+
         glsafe(::glBindBuffer(GL_ARRAY_BUFFER, cap.vbo));
-            glsafe(::glVertexPointer(cap.buffer->vertices.position_size_floats(), GL_FLOAT, cap.buffer->vertices.vertex_size_bytes(), (const void*)cap.buffer->vertices.position_offset_bytes()));
-            glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
-            bool has_normals = cap.buffer->vertices.normal_size_floats() > 0;
+        if (position_id != -1) {
+            glsafe(::glVertexAttribPointer(position_id, buffer->vertices.position_size_floats(), GL_FLOAT, GL_FALSE, buffer->vertices.vertex_size_bytes(), (const void*)buffer->vertices.position_offset_bytes()));
+            glsafe(::glEnableVertexAttribArray(position_id));
+        }
+        const bool has_normals = buffer->vertices.normal_size_floats() > 0;
         if (has_normals) {
-                glsafe(::glNormalPointer(GL_FLOAT, cap.buffer->vertices.vertex_size_bytes(), (const void*)cap.buffer->vertices.normal_offset_bytes()));
-                glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
+            if (normal_id != -1) {
+                glsafe(::glVertexAttribPointer(normal_id, buffer->vertices.normal_size_floats(), GL_FLOAT, GL_FALSE, buffer->vertices.vertex_size_bytes(), (const void*)buffer->vertices.normal_offset_bytes()));
+                glsafe(::glEnableVertexAttribArray(normal_id));
+            }
         }
 
         shader->set_uniform("uniform_color", cap.color);
@@ -4053,14 +4088,14 @@ void GCodeViewer::render_toolpaths()
             ++m_statistics.gl_triangles_calls_count;
 #endif // ENABLE_GCODE_VIEWER_STATISTICS
 
-            if (has_normals)
-                glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
+        if (normal_id != -1)
+            glsafe(::glDisableVertexAttribArray(normal_id));
+        if (position_id != -1)
+            glsafe(::glDisableVertexAttribArray(position_id));
 
-            glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
         glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
 
         shader->stop_using();
-        }
     };
 
     for (unsigned int i = 0; i < 2; ++i) {
@@ -4076,7 +4111,7 @@ void GCodeViewer::render_shells()
         //if (!m_shells.visible || m_shells.volumes.empty())
         return;
 
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
+    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
     if (shader == nullptr)
         return;
 
@@ -4084,8 +4119,9 @@ void GCodeViewer::render_shells()
 //    glsafe(::glDepthMask(GL_FALSE));
 
     shader->start_using();
+    const Camera& camera = wxGetApp().plater()->get_camera();
     //BBS: reopen cul faces
-    m_shells.volumes.render(GLVolumeCollection::ERenderType::Transparent, false, wxGetApp().plater()->get_camera().get_view_matrix());
+    m_shells.volumes.render(GLVolumeCollection::ERenderType::Transparent, false, camera.get_view_matrix(), camera.get_projection_matrix());
     shader->stop_using();
 
     //    glsafe(::glDepthMask(GL_TRUE));

src/slic3r/GUI/GLCanvas3D.cpp

@@ -14,22 +14,16 @@
 #include "libslic3r/Technologies.hpp"
 #include "libslic3r/Tesselate.hpp"
 #include "libslic3r/PresetBundle.hpp"
-#include "slic3r/GUI/3DBed.hpp"
-#include "slic3r/GUI/3DScene.hpp"
-#include "slic3r/GUI/BackgroundSlicingProcess.hpp"
-#include "slic3r/GUI/GLCanvas3D.hpp"
-#include "slic3r/GUI/GLShader.hpp"
-#include "slic3r/GUI/GUI.hpp"
-#include "slic3r/GUI/Tab.hpp"
-#include "slic3r/GUI/GUI_Preview.hpp"
-#include "slic3r/GUI/OpenGLManager.hpp"
-#include "slic3r/GUI/Plater.hpp"
-#include "slic3r/GUI/MainFrame.hpp"
-#include "slic3r/Utils/UndoRedo.hpp"
-#include "slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp"
-#include "slic3r/GUI/BitmapCache.hpp"
-#include "slic3r/Utils/MacDarkMode.hpp"
-
+#include "3DBed.hpp"
+#include "3DScene.hpp"
+#include "BackgroundSlicingProcess.hpp"
+#include "GLShader.hpp"
+#include "GUI.hpp"
+#include "Tab.hpp"
+#include "GUI_Preview.hpp"
+#include "OpenGLManager.hpp"
+#include "Plater.hpp"
+#include "MainFrame.hpp"
 #include "GUI_App.hpp"
 #include "GUI_ObjectList.hpp"
 #include "GUI_Colors.hpp"
@@ -38,6 +32,9 @@
 #include "NotificationManager.hpp"
 #include "format.hpp"
 
+#include "slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp"
+#include "slic3r/Utils/UndoRedo.hpp"
+
 #include <slic3r/GUI/GUI_Utils.hpp>
 
 #if ENABLE_RETINA_GL
@@ -166,7 +163,7 @@ void GLCanvas3D::LayersEditing::select_object(const Model& model, int object_id)
 
 bool GLCanvas3D::LayersEditing::is_allowed() const
 {
-    return wxGetApp().get_shader("variable_layer_height") != nullptr && m_z_texture_id > 0;
+    return wxGetApp().get_shader("variable_layer_height_attr") != nullptr && m_z_texture_id > 0;
 }
 
 bool GLCanvas3D::LayersEditing::is_enabled() const
@@ -220,9 +217,8 @@ void GLCanvas3D::LayersEditing::render_variable_layer_height_dialog(const GLCanv
 
     ImGuiWrapper& imgui = *wxGetApp().imgui();
     const Size& cnv_size = canvas.get_canvas_size();
-    float zoom = (float)wxGetApp().plater()->get_camera().get_zoom();
     float left_pos = canvas.m_main_toolbar.get_item("layersediting")->render_left_pos;
-    const float x = 0.5 * cnv_size.get_width() + left_pos * zoom;
+    const float x = (1 + left_pos) * cnv_size.get_width() / 2;
     imgui.set_next_window_pos(x, canvas.m_main_toolbar.get_height(), ImGuiCond_Always, 0.0f, 0.0f);
 
     imgui.push_toolbar_style(canvas.get_scale());
@@ -322,12 +318,8 @@ void GLCanvas3D::LayersEditing::render_variable_layer_height_dialog(const GLCanv
 void GLCanvas3D::LayersEditing::render_overlay(const GLCanvas3D& canvas)
 {
     render_variable_layer_height_dialog(canvas);
-    const Rect& bar_rect = get_bar_rect_viewport(canvas);
-    m_profile.dirty = m_profile.old_bar_rect != bar_rect;
-    render_active_object_annotations(canvas, bar_rect);
-    render_profile(bar_rect);
-    m_profile.old_bar_rect = bar_rect;
-    m_profile.dirty = false;
+    render_active_object_annotations(canvas);
+    render_profile(canvas);
 }
 
 float GLCanvas3D::LayersEditing::get_cursor_z_relative(const GLCanvas3D& canvas)
@@ -361,18 +353,9 @@ Rect GLCanvas3D::LayersEditing::get_bar_rect_screen(const GLCanvas3D& canvas)
     return { w - thickness_bar_width(canvas), 0.0f, w, h };
 }
 
-Rect GLCanvas3D::LayersEditing::get_bar_rect_viewport(const GLCanvas3D& canvas)
-{
-    const Size& cnv_size = canvas.get_canvas_size();
-    float half_w = 0.5f * (float)cnv_size.get_width();
-    float half_h = 0.5f * (float)cnv_size.get_height();
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-    return { (half_w - thickness_bar_width(canvas)) * inv_zoom, half_h * inv_zoom, half_w * inv_zoom, -half_h * inv_zoom };
-}
-
 bool GLCanvas3D::LayersEditing::is_initialized() const
 {
-    return wxGetApp().get_shader("variable_layer_height") != nullptr;
+    return wxGetApp().get_shader("variable_layer_height_attr") != nullptr;
 }
 
 std::string GLCanvas3D::LayersEditing::get_tooltip(const GLCanvas3D& canvas) const
@@ -401,12 +384,20 @@ std::string GLCanvas3D::LayersEditing::get_tooltip(const GLCanvas3D& canvas) con
     return ret;
 }
 
-void GLCanvas3D::LayersEditing::render_active_object_annotations(const GLCanvas3D& canvas, const Rect& bar_rect)
+void GLCanvas3D::LayersEditing::render_active_object_annotations(const GLCanvas3D& canvas)
 {
     if (!m_enabled)
         return;
 
-    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height");
+    const Size cnv_size = canvas.get_canvas_size();
+    const float cnv_width  = (float)cnv_size.get_width();
+    const float cnv_height = (float)cnv_size.get_height();
+    if (cnv_width == 0.0f || cnv_height == 0.0f)
+        return;
+
+    const float cnv_inv_width = 1.0f / cnv_width;
+
+    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height_attr");
     if (shader == nullptr)
         return;
 
@@ -417,32 +408,36 @@ void GLCanvas3D::LayersEditing::render_active_object_annotations(const GLCanvas3
     shader->set_uniform("z_cursor", m_object_max_z * this->get_cursor_z_relative(canvas));
     shader->set_uniform("z_cursor_band_width", band_width);
     shader->set_uniform("object_max_z", m_object_max_z);
+    shader->set_uniform("view_model_matrix", Transform3d::Identity());
+    shader->set_uniform("projection_matrix", Transform3d::Identity());
+    shader->set_uniform("normal_matrix", (Matrix3d)Eigen::Matrix3d::Identity());
 
     glsafe(::glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
     glsafe(::glBindTexture(GL_TEXTURE_2D, m_z_texture_id));
 
     // Render the color bar
-    if (!m_profile.background.is_initialized() || m_profile.dirty) {
+    if (!m_profile.background.is_initialized() || m_profile.old_canvas_width != cnv_width) {
+        m_profile.old_canvas_width = cnv_width;
         m_profile.background.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P2T2, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P2T2 };
         init_data.reserve_vertices(4);
         init_data.reserve_indices(6);
 
         // vertices
-        const float l = bar_rect.get_left();
-        const float r = bar_rect.get_right();
-        const float t = bar_rect.get_top();
-        const float b = bar_rect.get_bottom();
+        const float l = 1.0f - 2.0f * THICKNESS_BAR_WIDTH * cnv_inv_width;
+        const float r = 1.0f;
+        const float t = 1.0f;
+        const float b = -1.0f;
         init_data.add_vertex(Vec2f(l, b), Vec2f(0.0f, 0.0f));
         init_data.add_vertex(Vec2f(r, b), Vec2f(1.0f, 0.0f));
         init_data.add_vertex(Vec2f(r, t), Vec2f(1.0f, 1.0f));
         init_data.add_vertex(Vec2f(l, t), Vec2f(0.0f, 1.0f));
 
         // indices
-        init_data.add_ushort_triangle(0, 1, 2);
-        init_data.add_ushort_triangle(2, 3, 0);
+        init_data.add_triangle(0, 1, 2);
+        init_data.add_triangle(2, 3, 0);
 
         m_profile.background.init_from(std::move(init_data));
     }
@@ -454,73 +449,82 @@ void GLCanvas3D::LayersEditing::render_active_object_annotations(const GLCanvas3
     shader->stop_using();
 }
 
-void GLCanvas3D::LayersEditing::render_profile(const Rect& bar_rect)
+void GLCanvas3D::LayersEditing::render_profile(const GLCanvas3D& canvas)
 {
     if (!m_enabled)
         return;
 
     //FIXME show some kind of legend.
+
     if (!m_slicing_parameters)
         return;
 
+    const Size cnv_size = canvas.get_canvas_size();
+    const float cnv_width  = (float)cnv_size.get_width();
+    const float cnv_height = (float)cnv_size.get_height();
+    if (cnv_width == 0.0f || cnv_height == 0.0f)
+        return;
+
     // Make the vertical bar a bit wider so the layer height curve does not touch the edge of the bar region.
-    const float scale_x = bar_rect.get_width() / float(1.12 * m_slicing_parameters->max_layer_height);
-    const float scale_y = bar_rect.get_height() / m_object_max_z;
+    const float scale_x = THICKNESS_BAR_WIDTH / float(1.12 * m_slicing_parameters->max_layer_height);
+    const float scale_y = cnv_height / m_object_max_z;
+
+    const float cnv_inv_width  = 1.0f / cnv_width;
+    const float cnv_inv_height = 1.0f / cnv_height;
 
     // Baseline
-    if (!m_profile.baseline.is_initialized() || m_profile.dirty) {
+    if (!m_profile.baseline.is_initialized() || m_profile.old_layer_height_profile != m_layer_height_profile) {
         m_profile.baseline.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P2, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P2};
         init_data.color = ColorRGBA::BLACK();
         init_data.reserve_vertices(2);
         init_data.reserve_indices(2);
 
         // vertices
-        const float x = bar_rect.get_left() + float(m_slicing_parameters->layer_height) * scale_x;
-        init_data.add_vertex(Vec2f(x, bar_rect.get_bottom()));
-        init_data.add_vertex(Vec2f(x, bar_rect.get_top()));
+        const float axis_x = 2.0f * ((cnv_width - THICKNESS_BAR_WIDTH + float(m_slicing_parameters->layer_height) * scale_x) * cnv_inv_width - 0.5f);
+        init_data.add_vertex(Vec2f(axis_x, -1.0f));
+        init_data.add_vertex(Vec2f(axis_x, 1.0f));
 
         // indices
-        init_data.add_ushort_line(0, 1);
+        init_data.add_line(0, 1);
 
         m_profile.baseline.init_from(std::move(init_data));
     }
 
-    if (!m_profile.profile.is_initialized() || m_profile.dirty || m_profile.old_layer_height_profile != m_layer_height_profile) {
+    if (!m_profile.profile.is_initialized() || m_profile.old_layer_height_profile != m_layer_height_profile) {
         m_profile.old_layer_height_profile = m_layer_height_profile;
         m_profile.profile.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::LineStrip, GLModel::Geometry::EVertexLayout::P2, GLModel::Geometry::index_type(m_layer_height_profile.size() / 2) };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::LineStrip, GLModel::Geometry::EVertexLayout::P2 };
         init_data.color = ColorRGBA::BLUE();
         init_data.reserve_vertices(m_layer_height_profile.size() / 2);
         init_data.reserve_indices(m_layer_height_profile.size() / 2);
 
         // vertices + indices
         for (unsigned int i = 0; i < (unsigned int)m_layer_height_profile.size(); i += 2) {
-            init_data.add_vertex(Vec2f(bar_rect.get_left() + float(m_layer_height_profile[i + 1]) * scale_x,
-                                       bar_rect.get_bottom() + float(m_layer_height_profile[i]) * scale_y));
-            if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-                init_data.add_ushort_index((unsigned short)i / 2);
-            else
-                init_data.add_uint_index(i / 2);
+            init_data.add_vertex(Vec2f(2.0f * ((cnv_width - THICKNESS_BAR_WIDTH + float(m_layer_height_profile[i + 1]) * scale_x) * cnv_inv_width - 0.5f),
+                                       2.0f * (float(m_layer_height_profile[i]) * scale_y * cnv_inv_height - 0.5)));
+            init_data.add_index(i / 2);
         }
 
         m_profile.profile.init_from(std::move(init_data));
     }
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
+        shader->set_uniform("view_model_matrix", Transform3d::Identity());
+        shader->set_uniform("projection_matrix", Transform3d::Identity());
         m_profile.baseline.render();
         m_profile.profile.render();
         shader->stop_using();
     }
 }
 
-void GLCanvas3D::LayersEditing::render_volumes(const GLCanvas3D & canvas, const GLVolumeCollection & volumes)//render volume and layer height texture (has mapping relation with each other)
+void GLCanvas3D::LayersEditing::render_volumes(const GLCanvas3D& canvas, const GLVolumeCollection& volumes)
 {
     assert(this->is_allowed());
     assert(this->last_object_id != -1);
@@ -530,7 +534,7 @@ void GLCanvas3D::LayersEditing::render_volumes(const GLCanvas3D & canvas, const
     if (current_shader != nullptr)
         current_shader->stop_using();
 
-    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height");
+    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height_attr");
     if (shader == nullptr)
         return;
 
@@ -544,6 +548,9 @@ void GLCanvas3D::LayersEditing::render_volumes(const GLCanvas3D & canvas, const
     shader->set_uniform("z_cursor", float(m_object_max_z) * float(this->get_cursor_z_relative(canvas)));
     shader->set_uniform("z_cursor_band_width", float(this->band_width));
 
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+
     // Initialize the layer height texture mapping.
     const GLsizei w = (GLsizei)m_layers_texture.width;
     const GLsizei h = (GLsizei)m_layers_texture.height;
@@ -562,6 +569,9 @@ void GLCanvas3D::LayersEditing::render_volumes(const GLCanvas3D & canvas, const
 
         shader->set_uniform("volume_world_matrix", glvolume->world_matrix());
         shader->set_uniform("object_max_z", 0.0f);
+        const Transform3d view_model_matrix = camera.get_view_matrix() * glvolume->world_matrix();
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
 
         glvolume->render();
     }
@@ -883,7 +893,7 @@ void GLCanvas3D::SequentialPrintClearance::set_polygons(const Polygons& polygons
     if (!polygons.empty()) {
         if (m_render_fill) {
             GLModel::Geometry fill_data;
-            fill_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::UINT };
+            fill_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3 };
             fill_data.color  = { 0.8f, 0.8f, 1.0f, 0.5f };
 
             // vertices + indices
@@ -897,7 +907,7 @@ void GLCanvas3D::SequentialPrintClearance::set_polygons(const Polygons& polygons
                     fill_data.add_vertex((Vec3f)(v.cast<float>() + 0.0125f * Vec3f::UnitZ())); // add a small positive z to avoid z-fighting
                     ++vertices_counter;
                     if (vertices_counter % 3 == 0)
-                        fill_data.add_uint_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
+                        fill_data.add_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
                 }
             }
 
@@ -910,7 +920,7 @@ void GLCanvas3D::SequentialPrintClearance::set_polygons(const Polygons& polygons
     //BBS: add the height limit compute logic
     if (!height_polygons.empty()) {
         GLModel::Geometry height_fill_data;
-        height_fill_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::UINT };
+        height_fill_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3 };
         height_fill_data.color  = {0.8f, 0.8f, 1.0f, 0.5f};
 
         // vertices + indices
@@ -923,7 +933,7 @@ void GLCanvas3D::SequentialPrintClearance::set_polygons(const Polygons& polygons
                 height_fill_data.add_vertex(point);
                 ++vertices_counter;
                 if (vertices_counter % 3 == 0)
-                    height_fill_data.add_uint_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
+                    height_fill_data.add_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
             }
         }
 
@@ -936,12 +946,16 @@ void GLCanvas3D::SequentialPrintClearance::render()
     const ColorRGBA FILL_COLOR = { 0.7f, 0.7f, 1.0f, 0.5f };
     const ColorRGBA NO_FILL_COLOR = { 0.75f, 0.75f, 0.75f, 0.75f };
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader == nullptr)
         return;
 
     shader->start_using();
 
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+
     glsafe(::glEnable(GL_DEPTH_TEST));
     glsafe(::glDisable(GL_CULL_FACE));
     glsafe(::glEnable(GL_BLEND));
@@ -1839,9 +1853,9 @@ void GLCanvas3D::render(bool only_init)
         _render_sla_slices();
         _render_selection();
         if (!no_partplate)
-            _render_bed(!camera.is_looking_downward(), show_axes);
+            _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(), show_axes);
         if (!no_partplate) //BBS: add outline logic
-            _render_platelist(!camera.is_looking_downward(), only_current, only_body, hover_id, true);
+            _render_platelist(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(), only_current, only_body, hover_id, true);
         _render_objects(GLVolumeCollection::ERenderType::Transparent, !m_gizmos.is_running());
     }
     /* preview render */
@@ -1849,8 +1863,8 @@ void GLCanvas3D::render(bool only_init)
         _render_objects(GLVolumeCollection::ERenderType::Opaque, !m_gizmos.is_running());
         _render_sla_slices();
         _render_selection();
-        _render_bed(!camera.is_looking_downward(), show_axes);
-        _render_platelist(!camera.is_looking_downward(), only_current, true, hover_id);
+        _render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(), show_axes);
+        _render_platelist(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(), only_current, true, hover_id);
         // BBS: GUI refactor: add canvas size as parameters
         _render_gcode(cnv_size.get_width(), cnv_size.get_height());
     }
@@ -1858,7 +1872,7 @@ void GLCanvas3D::render(bool only_init)
     else if (m_canvas_type == ECanvasType::CanvasAssembleView) {
         //BBS: add outline logic
         _render_objects(GLVolumeCollection::ERenderType::Opaque, !m_gizmos.is_running());
-        //_render_bed(!camera.is_looking_downward(), show_axes);
+        //_render_bed(camera.get_view_matrix(), camera.get_projection_matrix(), !camera.is_looking_downward(), show_axes);
         _render_plane();
         //BBS: add outline logic insteadof selection under assemble view
         //_render_selection();
@@ -1992,7 +2006,7 @@ void GLCanvas3D::render_thumbnail(ThumbnailData& thumbnail_data, unsigned int w,
 void GLCanvas3D::render_thumbnail(ThumbnailData& thumbnail_data, unsigned int w, unsigned int h, const ThumbnailsParams& thumbnail_params,
     const GLVolumeCollection& volumes, Camera::EType camera_type, bool use_top_view, bool for_picking)
 {
-    GLShaderProgram* shader = wxGetApp().get_shader("thumbnail");
+    GLShaderProgram* shader = wxGetApp().get_shader("thumbnail_attr");
     ModelObjectPtrs& model_objects = GUI::wxGetApp().model().objects;
     std::vector<ColorRGBA> colors = ::get_extruders_colors();
     switch (OpenGLManager::get_framebuffers_type())
@@ -5180,7 +5194,7 @@ bool GLCanvas3D::_render_orient_menu(float left, float right, float bottom, floa
     //original use center as {0.0}, and top is (canvas_h/2), bottom is (-canvas_h/2), also plus inv_camera
     //now change to left_up as {0,0}, and top is 0, bottom is canvas_h
 #if BBS_TOOLBAR_ON_TOP
-    const float x = left * float(wxGetApp().plater()->get_camera().get_zoom()) + 0.5f * canvas_w;
+    const float x = (1 + left) * canvas_w / 2;
     ImGuiWrapper::push_toolbar_style(get_scale());
     imgui->set_next_window_pos(x, m_main_toolbar.get_height(), ImGuiCond_Always, 0.5f, 0.0f);
 #else
@@ -5265,9 +5279,8 @@ bool GLCanvas3D::_render_arrange_menu(float left, float right, float bottom, flo
     //original use center as {0.0}, and top is (canvas_h/2), bottom is (-canvas_h/2), also plus inv_camera
     //now change to left_up as {0,0}, and top is 0, bottom is canvas_h
 #if BBS_TOOLBAR_ON_TOP
-    float zoom = (float)wxGetApp().plater()->get_camera().get_zoom();
     float left_pos = m_main_toolbar.get_item("arrange")->render_left_pos;
-    const float x = 0.5 * canvas_w + left_pos * zoom;
+    const float x = (1 + left_pos) * canvas_w / 2;
     imgui->set_next_window_pos(x, m_main_toolbar.get_height(), ImGuiCond_Always, 0.0f, 0.0f);
 
 #else
@@ -5536,19 +5549,15 @@ void GLCanvas3D::render_thumbnail_internal(ThumbnailData& thumbnail_data, const
     }
     else {
         camera.zoom_to_box(volumes_box);
-        const Vec3d& target = camera.get_target();
-        double distance = camera.get_distance();
         camera.select_view("iso");
-        camera.apply_view_matrix();
-
-        camera.apply_projection(plate_build_volume);
     }
-
     camera.apply_view_matrix();
 
+    const Transform3d &view_matrix = camera.get_view_matrix();
+
     camera.apply_projection(plate_build_volume);
 
-    //GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
+    //GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
     if (!for_picking && (shader == nullptr)) {
         BOOST_LOG_TRIVIAL(info) <<  boost::format("render_thumbnail with no picking: shader is null, return directly");
         return;
@@ -5561,6 +5570,8 @@ void GLCanvas3D::render_thumbnail_internal(ThumbnailData& thumbnail_data, const
     glsafe(::glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
     glsafe(::glEnable(GL_DEPTH_TEST));
 
+    const Transform3d &projection_matrix = camera.get_projection_matrix();
+
     if (for_picking) {
         //if (OpenGLManager::can_multisample())
               // This flag is often ignored by NVIDIA drivers if rendering into a screen buffer.
@@ -5573,9 +5584,6 @@ void GLCanvas3D::render_thumbnail_internal(ThumbnailData& thumbnail_data, const
         // do not cull backfaces to show broken geometry, if any
         glsafe(::glDisable(GL_CULL_FACE));
 
-        //glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
-        //glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
-
         for (GLVolume* vol : visible_volumes) {
             // Object picking mode. Render the object with a color encoding the object index.
             // we reserve color = (0,0,0) for occluders (as the printbed)
@@ -5587,15 +5595,19 @@ void GLCanvas3D::render_thumbnail_internal(ThumbnailData& thumbnail_data, const
             unsigned int g = (id & (0x000000FF << 8)) >> 8;
             unsigned int b = (id & (0x000000FF << 16)) >> 16;
             unsigned int a = 0xFF;
-            glsafe(::glColor4f((GLfloat)r * INV_255, (GLfloat)g * INV_255, (GLfloat)b * INV_255, (GLfloat)a * INV_255));
+            vol->model.set_color({(GLfloat)r * INV_255, (GLfloat)g * INV_255, (GLfloat)b * INV_255, (GLfloat)a * INV_255});
             /*curr_color[0] = (GLfloat)r * INV_255;
             curr_color[1] = (GLfloat)g * INV_255;
             curr_color[2] = (GLfloat)b * INV_255;
             curr_color[3] = (GLfloat)a * INV_255;
             shader->set_uniform("uniform_color", curr_color);*/
 
-            bool is_active = vol->is_active;
+            const bool is_active = vol->is_active;
             vol->is_active = true;
+            const Transform3d matrix = view_matrix * vol->world_matrix();
+            shader->set_uniform("view_model_matrix", matrix);
+            shader->set_uniform("projection_matrix", projection_matrix);
+            shader->set_uniform("normal_matrix", (Matrix3d) matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
             vol->simple_render(nullptr,  model_objects, extruder_colors);
             vol->is_active = is_active;
         }
@@ -5627,8 +5639,12 @@ void GLCanvas3D::render_thumbnail_internal(ThumbnailData& thumbnail_data, const
                 shader->set_uniform("uniform_color", (vol->printable && !vol->is_outside) ? orange : gray);
             }*/
             // the volume may have been deactivated by an active gizmo
-            bool is_active = vol->is_active;
+            const bool is_active = vol->is_active;
             vol->is_active = true;
+            const Transform3d matrix = view_matrix * vol->world_matrix();
+            shader->set_uniform("view_model_matrix", matrix);
+            shader->set_uniform("projection_matrix", projection_matrix);
+            shader->set_uniform("normal_matrix", (Matrix3d) matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
             vol->simple_render(shader,  model_objects, extruder_colors);
             vol->is_active = is_active;
         }
@@ -6404,7 +6420,8 @@ void GLCanvas3D::_picking_pass()
 
         //BBS: only render plate in view 3D
         if (m_canvas_type == ECanvasType::CanvasView3D) {
-            _render_plates_for_picking();
+            const Camera &camera = wxGetApp().plater()->get_camera();
+            _render_plates_for_picking(camera.get_view_matrix(), camera.get_projection_matrix());
         }
 
         m_camera_clipping_plane = m_gizmos.get_clipping_plane();
@@ -6574,12 +6591,6 @@ void GLCanvas3D::_render_background()
         }
     }
 
-    glsafe(::glPushMatrix());
-    glsafe(::glLoadIdentity());
-    glsafe(::glMatrixMode(GL_PROJECTION));
-    glsafe(::glPushMatrix());
-    glsafe(::glLoadIdentity());
-
     // Draws a bottom to top gradient over the complete screen.
     glsafe(::glDisable(GL_DEPTH_TEST));
 
@@ -6591,7 +6602,7 @@ void GLCanvas3D::_render_background()
         m_background.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P2T2, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P2T2 };
         init_data.reserve_vertices(4);
         init_data.reserve_indices(6);
 
@@ -6602,30 +6613,25 @@ void GLCanvas3D::_render_background()
         init_data.add_vertex(Vec2f(-1.0f, 1.0f),  Vec2f(0.0f, 1.0f));
 
         // indices
-        init_data.add_ushort_triangle(0, 1, 2);
-        init_data.add_ushort_triangle(2, 3, 0);
+        init_data.add_triangle(0, 1, 2);
+        init_data.add_triangle(2, 3, 0);
 
         m_background.init_from(std::move(init_data));
     }
 
-    GLShaderProgram* shader = wxGetApp().get_shader("background");
+    GLShaderProgram* shader = wxGetApp().get_shader("background_attr");
     if (shader != nullptr) {
         shader->start_using();
         shader->set_uniform("top_color", use_error_color ? ERROR_BG_LIGHT_COLOR : DEFAULT_BG_LIGHT_COLOR);
         shader->set_uniform("bottom_color", bottom_color);
-
         m_background.render();
         shader->stop_using();
     }
 
     glsafe(::glEnable(GL_DEPTH_TEST));
-
-    glsafe(::glPopMatrix());
-    glsafe(::glMatrixMode(GL_MODELVIEW));
-    glsafe(::glPopMatrix());
 }
 
-void GLCanvas3D::_render_bed(bool bottom, bool show_axes)
+void GLCanvas3D::_render_bed(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool show_axes)
 {
     float scale_factor = 1.0;
 #if ENABLE_RETINA_GL
@@ -6643,27 +6649,27 @@ void GLCanvas3D::_render_bed(bool bottom, bool show_axes)
     //bool show_texture = true;
     //BBS set axes mode
     m_bed.set_axes_mode(m_main_toolbar.is_enabled());
-    m_bed.render(*this, bottom, scale_factor, show_axes);
+    m_bed.render(*this, view_matrix, projection_matrix, bottom, scale_factor, show_axes);
 }
 
-void GLCanvas3D::_render_bed_for_picking(bool bottom)
+void GLCanvas3D::_render_bed_for_picking(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom)
 {
     float scale_factor = 1.0;
 #if ENABLE_RETINA_GL
     scale_factor = m_retina_helper->get_scale_factor();
 #endif // ENABLE_RETINA_GL
 
-    //m_bed.render_for_picking(*this, bottom, scale_factor);
+    //m_bed.render_for_picking(*this, view_matrix, projection_matrix, bottom, scale_factor);
 }
 
-void GLCanvas3D::_render_platelist(bool bottom, bool only_current, bool only_body, int hover_id, bool render_cali) const
+void GLCanvas3D::_render_platelist(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool only_current, bool only_body, int hover_id, bool render_cali)
 {
-    wxGetApp().plater()->get_partplate_list().render(bottom, only_current, only_body, hover_id, render_cali);
+    wxGetApp().plater()->get_partplate_list().render(view_matrix, projection_matrix, bottom, only_current, only_body, hover_id, render_cali);
 }
 
-void GLCanvas3D::_render_plates_for_picking() const
+void GLCanvas3D::_render_plates_for_picking(const Transform3d &view_matrix, const Transform3d &projection_matrix)
 {
-    wxGetApp().plater()->get_partplate_list().render_for_picking_pass();
+    wxGetApp().plater()->get_partplate_list().render_for_picking_pass(view_matrix, projection_matrix);
 }
 
 void GLCanvas3D::_render_plane() const
@@ -6736,7 +6742,7 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type, bool with
     else
         m_volumes.set_show_sinking_contours(!m_gizmos.is_hiding_instances());
 
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud");
+    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_attr");
     ECanvasType canvas_type = this->m_canvas_type;
     if (shader != nullptr) {
         shader->start_using();
@@ -6751,7 +6757,8 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type, bool with
             {
                 if (m_picking_enabled && m_layers_editing.is_enabled() && (m_layers_editing.last_object_id != -1) && (m_layers_editing.object_max_z() > 0.0f)) {
                     int object_id = m_layers_editing.last_object_id;
-                    m_volumes.render(type, false, wxGetApp().plater()->get_camera().get_view_matrix(), [object_id](const GLVolume& volume) {
+                const Camera& camera = wxGetApp().plater()->get_camera();
+                m_volumes.render(type, false, camera.get_view_matrix(), camera.get_projection_matrix(), [object_id](const GLVolume& volume) {
                     // Which volume to paint without the layer height profile shader?
                     return volume.is_active && (volume.is_modifier || volume.composite_id.object_id != object_id);
                     });
@@ -6766,7 +6773,8 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type, bool with
                     }*/
                     //BBS:add assemble view related logic
                     // do not cull backfaces to show broken geometry, if any
-                    m_volumes.render(type, m_picking_enabled, wxGetApp().plater()->get_camera().get_view_matrix(), [this, canvas_type](const GLVolume& volume) {
+                const Camera& camera = wxGetApp().plater()->get_camera();
+                    m_volumes.render(type, m_picking_enabled, camera.get_view_matrix(), camera.get_projection_matrix(), [this, canvas_type](const GLVolume& volume) {
                         if (canvas_type == ECanvasType::CanvasAssembleView) {
                             return !volume.is_modifier && !volume.is_wipe_tower;
                         }
@@ -6798,8 +6806,9 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type, bool with
                 else
                     shader->set_uniform("show_wireframe", false);
             }*/
+            const Camera& camera = wxGetApp().plater()->get_camera();
             //BBS:add assemble view related logic
-            m_volumes.render(type, false, wxGetApp().plater()->get_camera().get_view_matrix(), [this, canvas_type](const GLVolume& volume) {
+            m_volumes.render(type, false, camera.get_view_matrix(), camera.get_projection_matrix(), [this, canvas_type](const GLVolume& volume) {
                 if (canvas_type == ECanvasType::CanvasAssembleView) {
                     return !volume.is_modifier;
                 }
@@ -7171,16 +7180,13 @@ void GLCanvas3D::_render_style_editor()
 
 void GLCanvas3D::_render_volumes_for_picking() const
 {
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader == nullptr)
         return;
 
     // do not cull backfaces to show broken geometry, if any
     glsafe(::glDisable(GL_CULL_FACE));
 
-    glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
-    glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
-
     const Transform3d& view_matrix = wxGetApp().plater()->get_camera().get_view_matrix();
     for (size_t type = 0; type < 2; ++ type) {
         GLVolumeWithIdAndZList to_render = volumes_to_render(m_volumes.volumes, (type == 0) ? GLVolumeCollection::ERenderType::Opaque : GLVolumeCollection::ERenderType::Transparent, view_matrix);
@@ -7194,14 +7200,14 @@ void GLCanvas3D::_render_volumes_for_picking() const
                 //const unsigned int id = 1 + volume.second.first;
                 volume.first->model.set_color(picking_decode(id));
                 shader->start_using();
+                const Camera& camera = wxGetApp().plater()->get_camera();
+                shader->set_uniform("view_model_matrix", camera.get_view_matrix() * volume.first->world_matrix());
+                shader->set_uniform("projection_matrix", camera.get_projection_matrix());
                 volume.first->render();
                 shader->stop_using();
 	        }
 	}
 
-    glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
-    glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
-
     glsafe(::glEnable(GL_CULL_FACE));
 }
 
@@ -7241,33 +7247,20 @@ void GLCanvas3D::_render_main_toolbar()
     if (!m_main_toolbar.is_enabled())
         return;
 
-    Size cnv_size = get_canvas_size();
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+    const Size cnv_size = get_canvas_size();
+    const float top = 0.5f * (float)cnv_size.get_height();
 
-#if BBS_TOOLBAR_ON_TOP
     GLToolbar& collapse_toolbar = wxGetApp().plater()->get_collapse_toolbar();
-    float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
-    float gizmo_width = m_gizmos.get_scaled_total_width();
-    float assemble_width = m_assemble_view_toolbar.get_width();
-    float separator_width = m_separator_toolbar.get_width();
-    float top = 0.5f * (float)cnv_size.get_height() * inv_zoom;
-    float left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + separator_width + gizmo_width + assemble_width - collapse_toolbar_width)) * inv_zoom;
-#else
-    float gizmo_height = m_gizmos.get_scaled_total_height();
-    float space_height = GLGizmosManager::Default_Icons_Size * wxGetApp().toolbar_icon_scale();
-    float main_toolbar_height = (float)m_main_toolbar.get_height();
-    float assemble_height = m_assemble_view_toolbar.get_height();
-    float top = 0.5f * (main_toolbar_height + gizmo_height + assemble_height) * inv_zoom;
-    float left = (0.5f * (float)cnv_size.get_width() - m_main_toolbar.get_width()) * inv_zoom;
-    //BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": top %1%, main_toolbar_height %2%, space_height %3% gizmo_height %4%") % top % main_toolbar_height % space_height % gizmo_height;
-#endif
+    const float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
+    const float gizmo_width = m_gizmos.get_scaled_total_width();
+    const float assemble_width = m_assemble_view_toolbar.get_width();
+    const float separator_width = m_separator_toolbar.get_width();
+    const float left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + separator_width + gizmo_width + assemble_width - collapse_toolbar_width));
     m_main_toolbar.set_position(top, left);
     m_main_toolbar.render(*this);
     if (m_toolbar_highlighter.m_render_arrow)
-    {
         m_main_toolbar.render_arrow(*this, m_toolbar_highlighter.m_toolbar_item);
 }
-}
 
 //BBS: GUI refactor: GLToolbar adjust
 //when rendering, {0, 0} is at the center, {-0.5, 0.5} at the left-up
@@ -7591,28 +7584,16 @@ void GLCanvas3D::_render_assemble_view_toolbar() const
     if (!m_assemble_view_toolbar.is_enabled())
         return;
 
-    Size cnv_size = get_canvas_size();
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-
-#if BBS_TOOLBAR_ON_TOP
+    const Size cnv_size = get_canvas_size();
     GLToolbar& collapse_toolbar = wxGetApp().plater()->get_collapse_toolbar();
-    float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
-    float gizmo_width = m_gizmos.get_scaled_total_width();
-    float assemble_width = m_assemble_view_toolbar.get_width();
-    float separator_width = m_separator_toolbar.get_width();
-    float top = 0.5f * (float)cnv_size.get_height() * inv_zoom;
-    float main_toolbar_left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + gizmo_width + assemble_width - separator_width - collapse_toolbar_width)) * inv_zoom;
-    float left = main_toolbar_left + (m_main_toolbar.get_width() + gizmo_width) * inv_zoom;
-    //float left = 0.5f * (m_main_toolbar.get_width() + gizmo_width - m_assemble_view_toolbar.get_width() + collapse_toolbar_width) * inv_zoom;
-#else
-    float gizmo_height = m_gizmos.get_scaled_total_height();
-    //float space_height = GLGizmosManager::Default_Icons_Size * wxGetApp().toolbar_icon_scale();
-    float main_toolbar_height = (float)m_main_toolbar.get_height();
-    float assemble_height = (float)m_assemble_view_toolbar.get_height();
-    float top = 0.5f * (assemble_height - main_toolbar_height - gizmo_height) * inv_zoom;
-    float left = (0.5f * (float)cnv_size.get_width() - m_assemble_view_toolbar.get_width()) * inv_zoom;
-    //BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": top %1%, main_toolbar_height %2%, space_height %3% gizmo_height %4%") % top % main_toolbar_height % space_height % gizmo_height;
-#endif
+    const float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
+    const float gizmo_width = m_gizmos.get_scaled_total_width();
+    const float assemble_width = m_assemble_view_toolbar.get_width();
+    const float separator_width = m_separator_toolbar.get_width();
+    const float top = 0.5f * (float)cnv_size.get_height();
+    const float main_toolbar_left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + gizmo_width + assemble_width + separator_width - collapse_toolbar_width));
+    const float left = main_toolbar_left + (m_main_toolbar.get_width() + gizmo_width + separator_width);
+
     m_assemble_view_toolbar.set_position(top, left);
     m_assemble_view_toolbar.render(*this);
 }
@@ -7677,17 +7658,15 @@ void GLCanvas3D::_render_separator_toolbar_right() const
     if (!m_separator_toolbar.is_enabled())
         return;
 
-    Size cnv_size = get_canvas_size();
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-
+    const Size cnv_size = get_canvas_size();
     GLToolbar& collapse_toolbar = wxGetApp().plater()->get_collapse_toolbar();
-    float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
-    float gizmo_width = m_gizmos.get_scaled_total_width();
-    float assemble_width = m_assemble_view_toolbar.get_width();
-    float separator_width = m_separator_toolbar.get_width();
-    float top = 0.5f * (float)cnv_size.get_height() * inv_zoom;
-    float main_toolbar_left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + gizmo_width + assemble_width - collapse_toolbar_width)) * inv_zoom;
-    float left = main_toolbar_left + (m_main_toolbar.get_width() + gizmo_width) * inv_zoom;
+    const float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
+    const float gizmo_width = m_gizmos.get_scaled_total_width();
+    const float assemble_width = m_assemble_view_toolbar.get_width();
+    const float separator_width = m_separator_toolbar.get_width();
+    const float top = 0.5f * (float)cnv_size.get_height();
+    const float main_toolbar_left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + gizmo_width + assemble_width + separator_width - collapse_toolbar_width));
+    const float left = main_toolbar_left + (m_main_toolbar.get_width() + gizmo_width + separator_width / 2);
 
     m_separator_toolbar.set_position(top, left);
     m_separator_toolbar.render(*this,GLToolbarItem::SeparatorLine);
@@ -7698,17 +7677,15 @@ void GLCanvas3D::_render_separator_toolbar_left() const
     if (!m_separator_toolbar.is_enabled())
         return;
 
-    Size cnv_size = get_canvas_size();
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-
+    const Size cnv_size = get_canvas_size();
     GLToolbar& collapse_toolbar = wxGetApp().plater()->get_collapse_toolbar();
-    float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
-    float gizmo_width = m_gizmos.get_scaled_total_width();
-    float assemble_width = m_assemble_view_toolbar.get_width();
-    float separator_width = m_separator_toolbar.get_width();
-    float top = 0.5f * (float)cnv_size.get_height() * inv_zoom;
-    float main_toolbar_left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + gizmo_width + assemble_width + separator_width - collapse_toolbar_width)) * inv_zoom;
-    float left = main_toolbar_left + (m_main_toolbar.get_width()) * inv_zoom;
+    const float collapse_toolbar_width = collapse_toolbar.is_enabled() ? collapse_toolbar.get_width() : 0.0f;
+    const float gizmo_width = m_gizmos.get_scaled_total_width();
+    const float assemble_width = m_assemble_view_toolbar.get_width();
+    const float separator_width = m_separator_toolbar.get_width();
+    const float top = 0.5f * (float)cnv_size.get_height();
+    const float main_toolbar_left = std::max(-0.5f * cnv_size.get_width(), -0.5f * (m_main_toolbar.get_width() + gizmo_width + assemble_width + separator_width - collapse_toolbar_width));
+    const float left = main_toolbar_left + (m_main_toolbar.get_width());
 
     m_separator_toolbar.set_position(top, left);
     m_separator_toolbar.render(*this,GLToolbarItem::SeparatorLine);
@@ -7718,12 +7695,10 @@ void GLCanvas3D::_render_collapse_toolbar() const
 {
     GLToolbar& collapse_toolbar = wxGetApp().plater()->get_collapse_toolbar();
 
-    Size cnv_size = get_canvas_size();
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-
-    float top  = 0.5f * (float)cnv_size.get_height() * inv_zoom;
-    //float left = (0.5f * (float)cnv_size.get_width() - (float)collapse_toolbar.get_width() - band) * inv_zoom;
-    float left = -0.5f * (float)cnv_size.get_width() * inv_zoom;
+    const Size cnv_size = get_canvas_size();
+    const float top  = 0.5f * (float)cnv_size.get_height();
+    //const float left = (0.5f * (float)cnv_size.get_width() - (float)collapse_toolbar.get_width() - band);
+    const float left = -0.5f * (float)cnv_size.get_width();
 
     collapse_toolbar.set_position(top, left);
     collapse_toolbar.render(*this);
@@ -8002,52 +7977,51 @@ void GLCanvas3D::_render_assemble_info() const
 #if ENABLE_SHOW_CAMERA_TARGET
 void GLCanvas3D::_render_camera_target()
 {
-    static const double half_length = 5.0;
+    static const float half_length = 5.0f;
 
     glsafe(::glDisable(GL_DEPTH_TEST));
     glsafe(::glLineWidth(2.0f));
-    const Vec3d& target = wxGetApp().plater()->get_camera().get_target();
-    bool target_changed = !m_camera_target.target.isApprox(target);
-    m_camera_target.target = target;
+    const Vec3f& target = wxGetApp().plater()->get_camera().get_target().cast<float>();
+    bool target_changed = !m_camera_target.target.isApprox(target.cast<double>());
+    m_camera_target.target = target.cast<double>();
 
     for (int i = 0; i < 3; ++i) {
         if (!m_camera_target.axis[i].is_initialized() || target_changed) {
             m_camera_target.axis[i].reset();
 
-            GLModel::InitializationData init_data;
-            GLModel::InitializationData::Entity entity;
-            entity.type = GLModel::PrimitiveType::Lines;
-            entity.positions.reserve(2);
+            GLModel::Geometry init_data;
+            init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+            init_data.color = (i == X) ? ColorRGBA::X() : ((i == Y) ? ColorRGBA::Y() : ColorRGBA::Z());
+            init_data.reserve_vertices(2);
+            init_data.reserve_indices(2);
+
+            // vertices
             if (i == X) {
-                entity.positions.emplace_back(target.x() - half_length, target.y(), target.z());
-                entity.positions.emplace_back(target.x() + half_length, target.y(), target.z());
+                init_data.add_vertex(Vec3f(target.x() - half_length, target.y(), target.z()));
+                init_data.add_vertex(Vec3f(target.x() + half_length, target.y(), target.z()));
             }
             else if (i == Y) {
-                entity.positions.emplace_back(target.x(), target.y() - half_length, target.z());
-                entity.positions.emplace_back(target.x(), target.y() + half_length, target.z());
+                init_data.add_vertex(Vec3f(target.x(), target.y() - half_length, target.z()));
+                init_data.add_vertex(Vec3f(target.x(), target.y() + half_length, target.z()));
             }
             else {
-                entity.positions.emplace_back(target.x(), target.y(), target.z() - half_length);
-                entity.positions.emplace_back(target.x(), target.y(), target.z() + half_length);
-            }
-            entity.normals.reserve(2);
-            for (size_t j = 0; j < 2; ++j) {
-                entity.normals.emplace_back(Vec3f::UnitZ());
+                init_data.add_vertex(Vec3f(target.x(), target.y(), target.z() - half_length));
+                init_data.add_vertex(Vec3f(target.x(), target.y(), target.z() + half_length));
             }
 
-            entity.indices.reserve(2);
-            entity.indices.emplace_back(0);
-            entity.indices.emplace_back(1);
+            // indices
+            init_data.add_line(0, 1);
 
-            init_data.entities.emplace_back(entity);
-            m_camera_target.axis[i].init_from(init_data);
-            m_camera_target.axis[i].set_color(-1, (i == X) ? ColorRGBA::X() : (i == Y) ? ColorRGBA::Y() : ColorRGBA::Z());
+            m_camera_target.axis[i].init_from(std::move(init_data));
         }
     }
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
         for (int i = 0; i < 3; ++i) {
             m_camera_target.axis[i].render();
         }
@@ -8100,7 +8074,7 @@ void GLCanvas3D::_render_sla_slices()
 
         auto init_model = [](GLModel& model, const Pointf3s& triangles, const ColorRGBA& color) {
             GLModel::Geometry init_data;
-            init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::index_type(triangles.size()) };
+            init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3 };
             init_data.reserve_vertices(triangles.size());
             init_data.reserve_indices(triangles.size() / 3);
             init_data.color = color;
@@ -8110,10 +8084,7 @@ void GLCanvas3D::_render_sla_slices()
                 init_data.add_vertex((Vec3f)v.cast<float>());
                 ++vertices_count;
                 if (vertices_count % 3 == 0) {
-                    if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-                        init_data.add_ushort_triangle((unsigned short)vertices_count - 3, (unsigned short)vertices_count - 2, (unsigned short)vertices_count - 1);
-                    else
-                        init_data.add_uint_triangle(vertices_count - 3, vertices_count - 2, vertices_count - 1);
+                    init_data.add_triangle(vertices_count - 3, vertices_count - 2, vertices_count - 1);
                 }
             }
 
@@ -8164,24 +8135,25 @@ void GLCanvas3D::_render_sla_slices()
             }
         }
 
-        GLShaderProgram* shader = wxGetApp().get_shader("flat");
+        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
         if (shader != nullptr) {
             shader->start_using();
 
             for (const SLAPrintObject::Instance& inst : obj->instances()) {
-                glsafe(::glPushMatrix());
-                glsafe(::glTranslated(unscale<double>(inst.shift.x()), unscale<double>(inst.shift.y()), 0.0));
-                glsafe(::glRotatef(Geometry::rad2deg(inst.rotation), 0.0f, 0.0f, 1.0f));
-                if (obj->is_left_handed())
-                    // The polygons are mirrored by X.
-                    glsafe(::glScalef(-1.0f, 1.0f, 1.0f));
+                const Camera& camera = wxGetApp().plater()->get_camera();
+                const Transform3d view_model_matrix = camera.get_view_matrix() *
+                    Geometry::assemble_transform(Vec3d(unscale<double>(inst.shift.x()), unscale<double>(inst.shift.y()), 0.0),
+                        inst.rotation * Vec3d::UnitZ(), Vec3d::Ones(),
+                        obj->is_left_handed() ? Vec3d(-1.0f, 1.0f, 1.0f) : Vec3d::Ones());
+
+                shader->set_uniform("view_model_matrix", view_model_matrix);
+                shader->set_uniform("projection_matrix", camera.get_projection_matrix());
 
                 bottom_obj_triangles.render();
                 top_obj_triangles.render();
                 bottom_sup_triangles.render();
                 top_sup_triangles.render();
 
-                glsafe(::glPopMatrix());
             }
 
             shader->stop_using();
@@ -8371,7 +8343,7 @@ void GLCanvas3D::_load_print_toolpaths(const BuildVolume &build_volume)
 
     GLVolume* volume = m_volumes.new_toolpath_volume(color);
     GLModel::Geometry init_data;
-    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::UINT };
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     for (size_t i = 0; i < skirt_height; ++ i) {
         volume->print_zs.emplace_back(print_zs[i]);
         volume->offsets.emplace_back(init_data.indices_count());
@@ -8594,7 +8566,7 @@ void GLCanvas3D::_load_print_object_toolpaths(const PrintObject& print_object, c
 
         assert(vols.size() == geometries.size());
         for (GLModel::Geometry& g : geometries) {
-            g.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::UINT };
+            g.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
         }
         for (size_t idx_layer = range.begin(); idx_layer < range.end(); ++ idx_layer) {
             const Layer *layer = ctxt.layers[idx_layer];
@@ -8793,7 +8765,7 @@ void GLCanvas3D::_load_wipe_tower_toolpaths(const BuildVolume& build_volume, con
 
         assert(vols.size() == geometries.size());
         for (GLModel::Geometry& g : geometries) {
-            g.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::UINT };
+            g.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
         }
         for (size_t idx_layer = range.begin(); idx_layer < range.end(); ++idx_layer) {
             const std::vector<WipeTower::ToolChangeResult> &layer = ctxt.tool_change(idx_layer);

src/slic3r/GUI/GLCanvas3D.hpp

@@ -261,9 +261,8 @@ class GLCanvas3D
             GLModel baseline;
             GLModel profile;
             GLModel background;
-            Rect old_bar_rect;
+            float old_canvas_width{ 0.0f };
             std::vector<double> old_layer_height_profile;
-            bool dirty{ false };
         };
         Profile m_profile;
 
@@ -294,7 +293,6 @@ class GLCanvas3D
         static float get_cursor_z_relative(const GLCanvas3D& canvas);
         static bool bar_rect_contains(const GLCanvas3D& canvas, float x, float y);
         static Rect get_bar_rect_screen(const GLCanvas3D& canvas);
-        static Rect get_bar_rect_viewport(const GLCanvas3D& canvas);
         static float get_overlay_window_width() { return LayersEditing::s_overlay_window_width; }
 
         float object_max_z() const { return m_object_max_z; }
@@ -304,8 +302,8 @@ class GLCanvas3D
     private:
         bool is_initialized() const;
         void generate_layer_height_texture();
-        void render_active_object_annotations(const GLCanvas3D& canvas, const Rect& bar_rect);
-        void render_profile(const Rect& bar_rect);
+        void render_active_object_annotations(const GLCanvas3D& canvas);
+        void render_profile(const GLCanvas3D& canvas);
         void update_slicing_parameters();
 
         static float thickness_bar_width(const GLCanvas3D& canvas);
@@ -1117,11 +1115,11 @@ private:
     void _picking_pass();
     void _rectangular_selection_picking_pass();
     void _render_background();
-    void _render_bed(bool bottom, bool show_axes);
-    void _render_bed_for_picking(bool bottom);
+    void _render_bed(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool show_axes);
+    void _render_bed_for_picking(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom);
     //BBS: add part plate related logic
-    void _render_platelist(bool bottom, bool only_current, bool only_body = false, int hover_id = -1, bool render_cali = false) const;
-    void _render_plates_for_picking() const;
+    void _render_platelist(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool only_current, bool only_body = false, int hover_id = -1, bool render_cali = false);
+    void _render_plates_for_picking(const Transform3d& view_matrix, const Transform3d& projection_matrix);
     //BBS: add outline drawing logic
     void _render_objects(GLVolumeCollection::ERenderType type, bool with_outline = true);
     //BBS: GUI refactor: add canvas size as parameters

src/slic3r/GUI/GLModel.cpp

@@ -52,16 +52,6 @@ static void smooth_normals_corner(const TriangleMesh& mesh, std::vector<stl_norm
 }
 #endif // ENABLE_SMOOTH_NORMALS
 
-void GLModel::Geometry::reserve_vertices(size_t vertices_count)
-{
-    vertices.reserve(vertices_count * vertex_stride_floats(format));
-}
-
-void GLModel::Geometry::reserve_indices(size_t indices_count)
-{
-    indices.reserve(indices_count * index_stride_bytes(format));
-}
-
 void GLModel::Geometry::add_vertex(const Vec2f& position)
 {
     assert(format.vertex_layout == EVertexLayout::P2);
@@ -107,70 +97,22 @@ void GLModel::Geometry::add_vertex(const Vec3f& position, const Vec3f& normal)
     vertices.emplace_back(normal.z());
 }
 
-void GLModel::Geometry::add_ushort_index(unsigned short id)
+void GLModel::Geometry::add_index(unsigned int id)
 {
-    if (format.index_type != EIndexType::USHORT) {
-        assert(false);
-        return;
-    }
-    indices.resize(indices.size() + sizeof(unsigned short));
-    ::memcpy(indices.data() + indices.size() - sizeof(unsigned short), &id, sizeof(unsigned short));
+    indices.emplace_back(id);
 }
 
-void GLModel::Geometry::add_uint_index(unsigned int id)
+void GLModel::Geometry::add_line(unsigned int id1, unsigned int id2)
 {
-    if (format.index_type != EIndexType::UINT) {
-        assert(false);
-        return;
-    }
-    indices.resize(indices.size() + sizeof(unsigned int));
-    ::memcpy(indices.data() + indices.size() - sizeof(unsigned int), &id, sizeof(unsigned int));
+    indices.emplace_back(id1);
+    indices.emplace_back(id2);
 }
 
-void GLModel::Geometry::add_ushort_line(unsigned short id1, unsigned short id2)
+void GLModel::Geometry::add_triangle(unsigned int id1, unsigned int id2, unsigned int id3)
 {
-    if (format.index_type != EIndexType::USHORT) {
-        assert(false);
-        return;
-    }
-    indices.resize(indices.size() + 2 * sizeof(unsigned short));
-    ::memcpy(indices.data() + indices.size() - 2 * sizeof(unsigned short), &id1, sizeof(unsigned short));
-    ::memcpy(indices.data() + indices.size() - sizeof(unsigned short), &id2, sizeof(unsigned short));
-}
-
-void GLModel::Geometry::add_uint_line(unsigned int id1, unsigned int id2)
-{
-    if (format.index_type != EIndexType::UINT) {
-        assert(false);
-        return;
-    }
-    indices.resize(indices.size() + 2 * sizeof(unsigned int));
-    ::memcpy(indices.data() + indices.size() - 2 * sizeof(unsigned int), &id1, sizeof(unsigned int));
-    ::memcpy(indices.data() + indices.size() - sizeof(unsigned int), &id2, sizeof(unsigned int));
-}
-
-void GLModel::Geometry::add_ushort_triangle(unsigned short id1, unsigned short id2, unsigned short id3)
-{
-    if (format.index_type != EIndexType::USHORT) {
-        assert(false);
-        return;
-    }
-    indices.resize(indices.size() + 3 * sizeof(unsigned short));
-    ::memcpy(indices.data() + indices.size() - 3 * sizeof(unsigned short), &id1, sizeof(unsigned short));
-    ::memcpy(indices.data() + indices.size() - 2 * sizeof(unsigned short), &id2, sizeof(unsigned short));
-    ::memcpy(indices.data() + indices.size() - sizeof(unsigned short), &id3, sizeof(unsigned short));
-}
-
-void GLModel::Geometry::add_uint_triangle(unsigned int id1, unsigned int id2, unsigned int id3)
-{
-    if (format.index_type != EIndexType::UINT) {
-        assert(false);
-        return;
-    }
-    indices.resize(indices.size() + 3 * sizeof(unsigned int));
-    ::memcpy(indices.data() + indices.size() - 3 * sizeof(unsigned int), &id1, sizeof(unsigned int));
-    ::memcpy(indices.data() + indices.size() - 2 * sizeof(unsigned int), &id2, sizeof(unsigned int));
-    ::memcpy(indices.data() + indices.size() - sizeof(unsigned int), &id3, sizeof(unsigned int));
+    indices.emplace_back(id1);
+    indices.emplace_back(id2);
+    indices.emplace_back(id3);
 }
 
 Vec2f GLModel::Geometry::extract_position_2(size_t id) const
@@ -256,60 +198,29 @@ void GLModel::Geometry::set_vertex(size_t id, const Vec3f& position, const Vec3f
     }
 }
 
-void GLModel::Geometry::set_ushort_index(size_t id, unsigned short index)
+void GLModel::Geometry::set_index(size_t id, unsigned int index)
 {
     assert(id < indices_count());
     if (id < indices_count())
-        ::memcpy(indices.data() + id * sizeof(unsigned short), &index, sizeof(unsigned short));
+        indices[id] = index;
 }
 
-void GLModel::Geometry::set_uint_index(size_t id, unsigned int index)
+unsigned int GLModel::Geometry::extract_index(size_t id) const
 {
-    assert(id < indices_count());
-    if (id < indices_count())
-        ::memcpy(indices.data() + id * sizeof(unsigned int), &index, sizeof(unsigned int));
-}
-
-unsigned int GLModel::Geometry::extract_uint_index(size_t id) const
-{
-    if (format.index_type != EIndexType::UINT) {
-        assert(false);
-        return -1;
-    }
-
     if (indices_count() <= id) {
         assert(false);
         return -1;
     }
 
-    unsigned int ret = (unsigned int)-1;
-    ::memcpy(&ret, indices.data() + id * index_stride_bytes(format), sizeof(unsigned int));
-    return ret;
-}
-
-unsigned short GLModel::Geometry::extract_ushort_index(size_t id) const
-{
-    if (format.index_type != EIndexType::USHORT) {
-        assert(false);
-        return -1;
-    }
-
-    if (indices_count() <= id) {
-        assert(false);
-        return -1;
-    }
-
-    unsigned short ret = (unsigned short)-1;
-    ::memcpy(&ret, indices.data() + id * index_stride_bytes(format), sizeof(unsigned short));
-    return ret;
+    return indices[id];
 }
 
 void GLModel::Geometry::remove_vertex(size_t id)
 {
     assert(id < vertices_count());
     if (id < vertices_count()) {
-        size_t stride = vertex_stride_floats(format);
-        std::vector<float>::iterator it = vertices.begin() + id * stride;
+        const size_t stride = vertex_stride_floats(format);
+        std::vector<float>::const_iterator it = vertices.begin() + id * stride;
         vertices.erase(it, it + stride);
     }
 }
@@ -391,21 +302,17 @@ size_t GLModel::Geometry::tex_coord_offset_floats(const Format& format)
     };
 }
 
-size_t GLModel::Geometry::index_stride_bytes(const Format& format)
+size_t GLModel::Geometry::index_stride_bytes(const Geometry& data)
 {
-    switch (format.index_type)
+    switch (data.index_type)
     {
     case EIndexType::UINT:   { return sizeof(unsigned int); }
     case EIndexType::USHORT: { return sizeof(unsigned short); }
+    case EIndexType::UBYTE:  { return sizeof(unsigned char); }
     default:                 { assert(false); return 0; }
     };
 }
 
-GLModel::Geometry::EIndexType GLModel::Geometry::index_type(size_t vertices_count)
-{
-    return (vertices_count < 65536) ? EIndexType::USHORT : EIndexType::UINT;
-}
-
 bool GLModel::Geometry::has_position(const Format& format)
 {
     switch (format.vertex_layout)
@@ -491,7 +398,7 @@ void GLModel::init_from(const indexed_triangle_set& its)
     }
 
     Geometry& data = m_render_data.geometry;
-    data.format = { Geometry::EPrimitiveType::Triangles, Geometry::EVertexLayout::P3N3, GLModel::Geometry::index_type(3 * its.indices.size()) };
+    data.format = { Geometry::EPrimitiveType::Triangles, Geometry::EVertexLayout::P3N3 };
     data.reserve_vertices(3 * its.indices.size());
     data.reserve_indices(3 * its.indices.size());
 
@@ -505,10 +412,7 @@ void GLModel::init_from(const indexed_triangle_set& its)
             data.add_vertex(vertex[j], n);
         }
         vertices_counter += 3;
-        if (data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-            data.add_ushort_triangle((unsigned short)vertices_counter - 3, (unsigned short)vertices_counter - 2, (unsigned short)vertices_counter - 1);
-        else
-            data.add_uint_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
+        data.add_triangle(vertices_counter - 3, vertices_counter - 2, vertices_counter - 1);
     }
 
     // update bounding box
@@ -531,7 +435,7 @@ void GLModel::init_from(const Polygons& polygons, float z)
     }
 
     Geometry& data = m_render_data.geometry;
-    data.format = { Geometry::EPrimitiveType::Lines, Geometry::EVertexLayout::P3, Geometry::EIndexType::UINT };
+    data.format = { Geometry::EPrimitiveType::Lines, Geometry::EVertexLayout::P3 };
 
     size_t segments_count = 0;
     for (const Polygon& polygon : polygons) {
@@ -550,7 +454,7 @@ void GLModel::init_from(const Polygons& polygons, float z)
             data.add_vertex(Vec3f(unscale<float>(p0.x()), unscale<float>(p0.y()), z));
             data.add_vertex(Vec3f(unscale<float>(p1.x()), unscale<float>(p1.y()), z));
             vertices_counter += 2;
-            data.add_uint_line(vertices_counter - 2, vertices_counter - 1);
+            data.add_line(vertices_counter - 2, vertices_counter - 1);
         }
     }
 
@@ -598,7 +502,7 @@ void GLModel::reset()
     m_render_data.vertices_count = 0;
     m_render_data.indices_count  = 0;
     m_render_data.geometry.vertices = std::vector<float>();
-    m_render_data.geometry.indices  = std::vector<unsigned char>();
+    m_render_data.geometry.indices  = std::vector<unsigned int>();
     m_bounding_box = BoundingBoxf3();
     m_filename = std::string();
 }
@@ -618,13 +522,14 @@ static GLenum get_primitive_mode(const GLModel::Geometry::Format& format)
     }
 }
 
-static GLenum get_index_type(const GLModel::Geometry::Format& format)
+static GLenum get_index_type(const GLModel::Geometry& data)
 {
-    switch (format.index_type)
+    switch (data.index_type)
     {
     default:
     case GLModel::Geometry::EIndexType::UINT:   { return GL_UNSIGNED_INT; }
     case GLModel::Geometry::EIndexType::USHORT: { return GL_UNSIGNED_SHORT; }
+    case GLModel::Geometry::EIndexType::UBYTE:  { return GL_UNSIGNED_BYTE; }
     }
 }
 
@@ -642,7 +547,6 @@ void GLModel::render(const std::pair<size_t, size_t>& range)
         return;
 
     GLShaderProgram* shader = wxGetApp().get_current_shader();
-
     if (shader == nullptr)
         return;
 
@@ -655,7 +559,7 @@ void GLModel::render(const std::pair<size_t, size_t>& range)
     const Geometry& data = m_render_data.geometry;
 
     const GLenum mode = get_primitive_mode(data.format);
-    const GLenum index_type = get_index_type(data.format);
+    const GLenum index_type = get_index_type(data);
 
     const size_t vertex_stride_bytes = Geometry::vertex_stride_bytes(data.format);
     const bool position = Geometry::has_position(data.format);
@@ -664,74 +568,44 @@ void GLModel::render(const std::pair<size_t, size_t>& range)
 
     glsafe(::glBindBuffer(GL_ARRAY_BUFFER, m_render_data.vbo_id));
 
-    bool use_attributes = boost::algorithm::iends_with(shader->get_name(), "_attr");
-
     int position_id = -1;
     int normal_id = -1;
     int tex_coord_id = -1;
 
     if (position) {
-        if (use_attributes) {
         position_id = shader->get_attrib_location("v_position");
         if (position_id != -1) {
             glsafe(::glVertexAttribPointer(position_id, Geometry::position_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::position_offset_bytes(data.format)));
             glsafe(::glEnableVertexAttribArray(position_id));
         }
     }
-        else {
-            glsafe(::glVertexPointer(Geometry::position_stride_floats(data.format), GL_FLOAT, vertex_stride_bytes, (const void*)Geometry::position_offset_bytes(data.format)));
-            glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
-        }
-    }
     if (normal) {
-        if (use_attributes) {
         normal_id = shader->get_attrib_location("v_normal");
         if (normal_id != -1) {
             glsafe(::glVertexAttribPointer(normal_id, Geometry::normal_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::normal_offset_bytes(data.format)));
             glsafe(::glEnableVertexAttribArray(normal_id));
         }
     }
-        else {
-            glsafe(::glNormalPointer(GL_FLOAT, vertex_stride_bytes, (const void*)Geometry::normal_offset_bytes(data.format)));
-            glsafe(::glEnableClientState(GL_NORMAL_ARRAY));
-        }
-    }
     if (tex_coord) {
-        if (use_attributes) {
         tex_coord_id = shader->get_attrib_location("v_tex_coord");
         if (tex_coord_id != -1) {
             glsafe(::glVertexAttribPointer(tex_coord_id, Geometry::tex_coord_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::tex_coord_offset_bytes(data.format)));
             glsafe(::glEnableVertexAttribArray(tex_coord_id));
         }
     }
-        else {
-            glsafe(::glTexCoordPointer(Geometry::tex_coord_stride_floats(data.format), GL_FLOAT, vertex_stride_bytes, (const void*)Geometry::tex_coord_offset_bytes(data.format)));
-            glsafe(::glEnableClientState(GL_TEXTURE_COORD_ARRAY));
-        }
-    }
 
     shader->set_uniform("uniform_color", data.color);
 
     glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_render_data.ibo_id));
-    glsafe(::glDrawElements(mode, range.second - range.first, index_type, (const void*)(range.first * Geometry::index_stride_bytes(data.format))));
+    glsafe(::glDrawElements(mode, range.second - range.first, index_type, (const void*)(range.first * Geometry::index_stride_bytes(data))));
     glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
 
-    if (use_attributes) {
     if (tex_coord_id != -1)
         glsafe(::glDisableVertexAttribArray(tex_coord_id));
     if (normal_id != -1)
         glsafe(::glDisableVertexAttribArray(normal_id));
     if (position_id != -1)
         glsafe(::glDisableVertexAttribArray(position_id));
-    }
-    else {
-        if (tex_coord)
-            glsafe(::glDisableClientState(GL_TEXTURE_COORD_ARRAY));
-        if (normal)
-            glsafe(::glDisableClientState(GL_NORMAL_ARRAY));
-        if (position)
-            glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
-    }
 
     glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
 }
@@ -742,18 +616,18 @@ void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instance
         return;
 
     GLShaderProgram* shader = wxGetApp().get_current_shader();
-    if (shader == nullptr || !boost::algorithm::iends_with(shader->get_name(), "_instanced"))
+    if (shader == nullptr || !boost::algorithm::iends_with(shader->get_name(), "_instanced_attr"))
         return;
 
     // vertex attributes
-    GLint position_id = shader->get_attrib_location("v_position");
-    GLint normal_id   = shader->get_attrib_location("v_normal");
+    const GLint position_id = shader->get_attrib_location("v_position");
+    const GLint normal_id   = shader->get_attrib_location("v_normal");
     if (position_id == -1 || normal_id == -1)
         return;
 
     // instance attributes
-    GLint offset_id = shader->get_attrib_location("i_offset");
-    GLint scales_id = shader->get_attrib_location("i_scales");
+    const GLint offset_id = shader->get_attrib_location("i_offset");
+    const GLint scales_id = shader->get_attrib_location("i_scales");
     if (offset_id == -1 || scales_id == -1)
         return;
 
@@ -773,8 +647,8 @@ void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instance
 
     const Geometry& data = m_render_data.geometry;
 
-    GLenum mode = get_primitive_mode(data.format);
-    GLenum index_type = get_index_type(data.format);
+    const GLenum mode = get_primitive_mode(data.format);
+    const GLenum index_type = get_index_type(data);
 
     shader->set_uniform("uniform_color", data.color);
 
@@ -833,26 +707,36 @@ bool GLModel::send_to_gpu()
     // indices
     glsafe(::glGenBuffers(1, &m_render_data.ibo_id));
     glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_render_data.ibo_id));
+    if (m_render_data.vertices_count <= 256) {
+        // convert indices to unsigned char to save gpu memory
+        std::vector<unsigned char> reduced_indices(data.indices.size());
+        for (size_t i = 0; i < data.indices.size(); ++i) {
+            reduced_indices[i] = (unsigned char)data.indices[i];
+        }
+        data.index_type = Geometry::EIndexType::UBYTE;
+        glsafe(::glBufferData(GL_ELEMENT_ARRAY_BUFFER, reduced_indices.size() * sizeof(unsigned char), reduced_indices.data(), GL_STATIC_DRAW));
+        glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
+    }
+    else if (m_render_data.vertices_count <= 65536) {
+        // convert indices to unsigned short to save gpu memory
+        std::vector<unsigned short> reduced_indices(data.indices.size());
+        for (size_t i = 0; i < data.indices.size(); ++i) {
+            reduced_indices[i] = (unsigned short)data.indices[i];
+        }
+        data.index_type = Geometry::EIndexType::USHORT;
+        glsafe(::glBufferData(GL_ELEMENT_ARRAY_BUFFER, reduced_indices.size() * sizeof(unsigned short), reduced_indices.data(), GL_STATIC_DRAW));
+        glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
+    }
+    else {
         glsafe(::glBufferData(GL_ELEMENT_ARRAY_BUFFER, data.indices_size_bytes(), data.indices.data(), GL_STATIC_DRAW));
         glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
+    }
     m_render_data.indices_count = indices_count();
-    data.indices = std::vector<unsigned char>();
+    data.indices = std::vector<unsigned int>();
 
     return true;
 }
 
-static void append_vertex(GLModel::Geometry& data, const Vec3f& position, const Vec3f& normal)
-{
-    data.add_vertex(position, normal);
-}
-
-static void append_triangle(GLModel::Geometry& data, unsigned short v1, unsigned short v2, unsigned short v3)
-{
-    data.add_ushort_index(v1);
-    data.add_ushort_index(v2);
-    data.add_ushort_index(v3);
-}
-
 template<typename Fn>
 inline bool all_vertices_inside(const GLModel::Geometry& geometry, Fn fn)
 {
@@ -907,13 +791,12 @@ bool contains(const BuildVolume& volume, const GLModel& model, bool ignore_botto
     }
 }
 
-GLModel::Geometry stilized_arrow(unsigned short resolution, float tip_radius, float tip_height, float stem_radius, float stem_height)
+GLModel::Geometry stilized_arrow(unsigned int resolution, float tip_radius, float tip_height, float stem_radius, float stem_height)
 {
-    resolution = std::max<unsigned short>(4, resolution);
-    resolution = std::min<unsigned short>(10922, resolution); // ensure no unsigned short overflow of indices
+    resolution = std::max<unsigned int>(4, resolution);
 
     GLModel::Geometry data;
-    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::USHORT };
+    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     data.reserve_vertices(6 * resolution + 2);
     data.reserve_indices(6 * resolution * 3);
 
@@ -921,7 +804,7 @@ GLModel::Geometry stilized_arrow(unsigned short resolution, float tip_radius, fl
     std::vector<float> cosines(resolution);
     std::vector<float> sines(resolution);
 
-    for (unsigned short i = 0; i < resolution; ++i) {
+    for (unsigned int i = 0; i < resolution; ++i) {
         const float angle = angle_step * float(i);
         cosines[i] = ::cos(angle);
         sines[i] = -::sin(angle);
@@ -930,75 +813,74 @@ GLModel::Geometry stilized_arrow(unsigned short resolution, float tip_radius, fl
     const float total_height = tip_height + stem_height;
 
     // tip vertices/normals
-    append_vertex(data, { 0.0f, 0.0f, total_height }, Vec3f::UnitZ());
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_vertex(data, { tip_radius * sines[i], tip_radius * cosines[i], stem_height }, { sines[i], cosines[i], 0.0f });
+    data.add_vertex(Vec3f(0.0f, 0.0f, total_height), (Vec3f)Vec3f::UnitZ());
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_vertex(Vec3f(tip_radius * sines[i], tip_radius * cosines[i], stem_height), Vec3f(sines[i], cosines[i], 0.0f));
     }
 
     // tip triangles
-    for (unsigned short i = 0; i < resolution; ++i) {
-        const unsigned short v3 = (i < resolution - 1) ? i + 2 : 1;
-        append_triangle(data, 0, i + 1, v3);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        const unsigned int v3 = (i < resolution - 1) ? i + 2 : 1;
+        data.add_triangle(0, i + 1, v3);
     }
 
     // tip cap outer perimeter vertices
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_vertex(data, { tip_radius * sines[i], tip_radius * cosines[i], stem_height }, -Vec3f::UnitZ());
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_vertex(Vec3f(tip_radius * sines[i], tip_radius * cosines[i], stem_height), (Vec3f)(-Vec3f::UnitZ()));
     }
 
     // tip cap inner perimeter vertices
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_vertex(data, { stem_radius * sines[i], stem_radius * cosines[i], stem_height }, -Vec3f::UnitZ());
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_vertex(Vec3f(stem_radius * sines[i], stem_radius * cosines[i], stem_height), (Vec3f)(-Vec3f::UnitZ()));
     }
 
     // tip cap triangles
-    for (unsigned short i = 0; i < resolution; ++i) {
-        const unsigned short v2 = (i < resolution - 1) ? i + resolution + 2 : resolution + 1;
-        const unsigned short v3 = (i < resolution - 1) ? i + 2 * resolution + 2 : 2 * resolution + 1;
-        append_triangle(data, i + resolution + 1, v3, v2);
-        append_triangle(data, i + resolution + 1, i + 2 * resolution + 1, v3);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        const unsigned int v2 = (i < resolution - 1) ? i + resolution + 2 : resolution + 1;
+        const unsigned int v3 = (i < resolution - 1) ? i + 2 * resolution + 2 : 2 * resolution + 1;
+        data.add_triangle(i + resolution + 1, v3, v2);
+        data.add_triangle(i + resolution + 1, i + 2 * resolution + 1, v3);
     }
 
     // stem bottom vertices
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_vertex(data, { stem_radius * sines[i], stem_radius * cosines[i], stem_height }, { sines[i], cosines[i], 0.0f });
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_vertex(Vec3f(stem_radius * sines[i], stem_radius * cosines[i], stem_height), Vec3f(sines[i], cosines[i], 0.0f));
     }
 
     // stem top vertices
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_vertex(data, { stem_radius * sines[i], stem_radius * cosines[i], 0.0f }, { sines[i], cosines[i], 0.0f });
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_vertex(Vec3f(stem_radius * sines[i], stem_radius * cosines[i], 0.0f), Vec3f(sines[i], cosines[i], 0.0f));
     }
 
     // stem triangles
-    for (unsigned short i = 0; i < resolution; ++i) {
-        const unsigned short v2 = (i < resolution - 1) ? i + 3 * resolution + 2 : 3 * resolution + 1;
-        const unsigned short v3 = (i < resolution - 1) ? i + 4 * resolution + 2 : 4 * resolution + 1;
-        append_triangle(data, i + 3 * resolution + 1, v3, v2);
-        append_triangle(data, i + 3 * resolution + 1, i + 4 * resolution + 1, v3);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        const unsigned int v2 = (i < resolution - 1) ? i + 3 * resolution + 2 : 3 * resolution + 1;
+        const unsigned int v3 = (i < resolution - 1) ? i + 4 * resolution + 2 : 4 * resolution + 1;
+        data.add_triangle(i + 3 * resolution + 1, v3, v2);
+        data.add_triangle(i + 3 * resolution + 1, i + 4 * resolution + 1, v3);
     }
 
     // stem cap vertices
-    append_vertex(data, Vec3f::Zero(), -Vec3f::UnitZ());
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_vertex(data, { stem_radius * sines[i], stem_radius * cosines[i], 0.0f }, -Vec3f::UnitZ());
+    data.add_vertex((Vec3f)Vec3f::Zero(), (Vec3f)(-Vec3f::UnitZ()));
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_vertex(Vec3f(stem_radius * sines[i], stem_radius * cosines[i], 0.0f), (Vec3f)(-Vec3f::UnitZ()));
     }
 
     // stem cap triangles
-    for (unsigned short i = 0; i < resolution; ++i) {
-        const unsigned short v3 = (i < resolution - 1) ? i + 5 * resolution + 3 : 5 * resolution + 2;
-        append_triangle(data, 5 * resolution + 1, v3, i + 5 * resolution + 2);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        const unsigned int v3 = (i < resolution - 1) ? i + 5 * resolution + 3 : 5 * resolution + 2;
+        data.add_triangle(5 * resolution + 1, v3, i + 5 * resolution + 2);
     }
 
     return data;
 }
 
-GLModel::Geometry circular_arrow(unsigned short resolution, float radius, float tip_height, float tip_width, float stem_width, float thickness)
+GLModel::Geometry circular_arrow(unsigned int resolution, float radius, float tip_height, float tip_width, float stem_width, float thickness)
 {
-    resolution = std::max<unsigned short>(2, resolution);
-    resolution = std::min<unsigned short>(8188, resolution); // ensure no unsigned short overflow of indices
+    resolution = std::max<unsigned int>(2, resolution);
 
     GLModel::Geometry data;
-    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::USHORT };
+    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     data.reserve_vertices(8 * (resolution + 1) + 30);
     data.reserve_indices((8 * resolution + 16) * 3);
 
@@ -1012,146 +894,146 @@ GLModel::Geometry circular_arrow(unsigned short resolution, float radius, float
 
     // tip
     // top face vertices
-    append_vertex(data, { 0.0f, outer_radius, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { 0.0f, radius + half_tip_width, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { -tip_height, radius, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { 0.0f, radius - half_tip_width, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { 0.0f, inner_radius, half_thickness }, Vec3f::UnitZ());
+    data.add_vertex(Vec3f(0.0f, outer_radius, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(0.0f, radius + half_tip_width, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(-tip_height, radius, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(0.0f, radius - half_tip_width, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(0.0f, inner_radius, half_thickness), (Vec3f)Vec3f::UnitZ());
 
     // top face triangles
-    append_triangle(data, 0, 1, 2);
-    append_triangle(data, 0, 2, 4);
-    append_triangle(data, 4, 2, 3);
+    data.add_triangle(0, 1, 2);
+    data.add_triangle(0, 2, 4);
+    data.add_triangle(4, 2, 3);
 
     // bottom face vertices
-    append_vertex(data, { 0.0f, outer_radius, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { 0.0f, radius + half_tip_width, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { -tip_height, radius, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { 0.0f, radius - half_tip_width, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { 0.0f, inner_radius, -half_thickness }, -Vec3f::UnitZ());
+    data.add_vertex(Vec3f(0.0f, outer_radius, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(0.0f, radius + half_tip_width, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(-tip_height, radius, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(0.0f, radius - half_tip_width, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(0.0f, inner_radius, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
 
     // bottom face triangles
-    append_triangle(data, 5, 7, 6);
-    append_triangle(data, 5, 9, 7);
-    append_triangle(data, 9, 8, 7);
+    data.add_triangle(5, 7, 6);
+    data.add_triangle(5, 9, 7);
+    data.add_triangle(9, 8, 7);
 
     // side faces vertices
-    append_vertex(data, { 0.0f, outer_radius, -half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { 0.0f, radius + half_tip_width, -half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { 0.0f, outer_radius, half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { 0.0f, radius + half_tip_width, half_thickness }, Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, outer_radius, -half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, radius + half_tip_width, -half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, outer_radius, half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, radius + half_tip_width, half_thickness), (Vec3f)Vec3f::UnitX());
 
     Vec3f normal(-half_tip_width, tip_height, 0.0f);
     normal.normalize();
-    append_vertex(data, { 0.0f, radius + half_tip_width, -half_thickness }, normal);
-    append_vertex(data, { -tip_height, radius, -half_thickness }, normal);
-    append_vertex(data, { 0.0f, radius + half_tip_width, half_thickness }, normal);
-    append_vertex(data, { -tip_height, radius, half_thickness }, normal);
+    data.add_vertex(Vec3f(0.0f, radius + half_tip_width, -half_thickness), normal);
+    data.add_vertex(Vec3f(-tip_height, radius, -half_thickness), normal);
+    data.add_vertex(Vec3f(0.0f, radius + half_tip_width, half_thickness), normal);
+    data.add_vertex(Vec3f(-tip_height, radius, half_thickness), normal);
 
     normal = { -half_tip_width, -tip_height, 0.0f };
     normal.normalize();
-    append_vertex(data, { -tip_height, radius, -half_thickness }, normal);
-    append_vertex(data, { 0.0f, radius - half_tip_width, -half_thickness }, normal);
-    append_vertex(data, { -tip_height, radius, half_thickness }, normal);
-    append_vertex(data, { 0.0f, radius - half_tip_width, half_thickness }, normal);
+    data.add_vertex(Vec3f(-tip_height, radius, -half_thickness), normal);
+    data.add_vertex(Vec3f(0.0f, radius - half_tip_width, -half_thickness), normal);
+    data.add_vertex(Vec3f(-tip_height, radius, half_thickness), normal);
+    data.add_vertex(Vec3f(0.0f, radius - half_tip_width, half_thickness), normal);
 
-    append_vertex(data, { 0.0f, radius - half_tip_width, -half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { 0.0f, inner_radius, -half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { 0.0f, radius - half_tip_width, half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { 0.0f, inner_radius, half_thickness }, Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, radius - half_tip_width, -half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, inner_radius, -half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, radius - half_tip_width, half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(0.0f, inner_radius, half_thickness), (Vec3f)Vec3f::UnitX());
 
     // side face triangles
-    for (unsigned short i = 0; i < 4; ++i) {
-        const unsigned short ii = i * 4;
-        append_triangle(data, 10 + ii, 11 + ii, 13 + ii);
-        append_triangle(data, 10 + ii, 13 + ii, 12 + ii);
+    for (unsigned int i = 0; i < 4; ++i) {
+        const unsigned int ii = i * 4;
+        data.add_triangle(10 + ii, 11 + ii, 13 + ii);
+        data.add_triangle(10 + ii, 13 + ii, 12 + ii);
     }
 
     // stem
     // top face vertices
-    for (unsigned short i = 0; i <= resolution; ++i) {
+    for (unsigned int i = 0; i <= resolution; ++i) {
         const float angle = float(i) * step_angle;
-        append_vertex(data, { inner_radius * ::sin(angle), inner_radius * ::cos(angle), half_thickness }, Vec3f::UnitZ());
+        data.add_vertex(Vec3f(inner_radius * ::sin(angle), inner_radius * ::cos(angle), half_thickness), (Vec3f)Vec3f::UnitZ());
     }
 
-    for (unsigned short i = 0; i <= resolution; ++i) {
+    for (unsigned int i = 0; i <= resolution; ++i) {
         const float angle = float(i) * step_angle;
-        append_vertex(data, { outer_radius * ::sin(angle), outer_radius * ::cos(angle), half_thickness }, Vec3f::UnitZ());
+        data.add_vertex(Vec3f(outer_radius * ::sin(angle), outer_radius * ::cos(angle), half_thickness), (Vec3f)Vec3f::UnitZ());
     }
 
     // top face triangles
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_triangle(data, 26 + i, 27 + i, 27 + resolution + i);
-        append_triangle(data, 27 + i, 28 + resolution + i, 27 + resolution + i);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_triangle(26 + i, 27 + i, 27 + resolution + i);
+        data.add_triangle(27 + i, 28 + resolution + i, 27 + resolution + i);
     }
 
     // bottom face vertices
-    for (unsigned short i = 0; i <= resolution; ++i) {
+    for (unsigned int i = 0; i <= resolution; ++i) {
         const float angle = float(i) * step_angle;
-        append_vertex(data, { inner_radius * ::sin(angle), inner_radius * ::cos(angle), -half_thickness }, -Vec3f::UnitZ());
+        data.add_vertex(Vec3f(inner_radius * ::sin(angle), inner_radius * ::cos(angle), -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
     }
 
-    for (unsigned short i = 0; i <= resolution; ++i) {
+    for (unsigned int i = 0; i <= resolution; ++i) {
         const float angle = float(i) * step_angle;
-        append_vertex(data, { outer_radius * ::sin(angle), outer_radius * ::cos(angle), -half_thickness }, -Vec3f::UnitZ());
+        data.add_vertex(Vec3f(outer_radius * ::sin(angle), outer_radius * ::cos(angle), -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
     }
 
     // bottom face triangles
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_triangle(data, 28 + 2 * resolution + i, 29 + 3 * resolution + i, 29 + 2 * resolution + i);
-        append_triangle(data, 29 + 2 * resolution + i, 29 + 3 * resolution + i, 30 + 3 * resolution + i);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_triangle(28 + 2 * resolution + i, 29 + 3 * resolution + i, 29 + 2 * resolution + i);
+        data.add_triangle(29 + 2 * resolution + i, 29 + 3 * resolution + i, 30 + 3 * resolution + i);
     }
 
     // side faces vertices and triangles
-    for (unsigned short i = 0; i <= resolution; ++i) {
+    for (unsigned int i = 0; i <= resolution; ++i) {
         const float angle = float(i) * step_angle;
         const float c = ::cos(angle);
         const float s = ::sin(angle);
-        append_vertex(data, { inner_radius * s, inner_radius * c, -half_thickness }, { -s, -c, 0.0f });
+        data.add_vertex(Vec3f(inner_radius * s, inner_radius * c, -half_thickness), Vec3f(-s, -c, 0.0f));
     }
 
-    for (unsigned short i = 0; i <= resolution; ++i) {
+    for (unsigned int i = 0; i <= resolution; ++i) {
         const float angle = float(i) * step_angle;
         const float c = ::cos(angle);
         const float s = ::sin(angle);
-        append_vertex(data, { inner_radius * s, inner_radius * c, half_thickness }, { -s, -c, 0.0f });
+        data.add_vertex(Vec3f(inner_radius * s, inner_radius * c, half_thickness), Vec3f(-s, -c, 0.0f));
     }
 
-    unsigned short first_id = 26 + 4 * (resolution + 1);
-    for (unsigned short i = 0; i < resolution; ++i) {
-        const unsigned short ii = first_id + i;
-        append_triangle(data, ii, ii + 1, ii + resolution + 2);
-        append_triangle(data, ii, ii + resolution + 2, ii + resolution + 1);
+    unsigned int first_id = 26 + 4 * (resolution + 1);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        const unsigned int ii = first_id + i;
+        data.add_triangle(ii, ii + 1, ii + resolution + 2);
+        data.add_triangle(ii, ii + resolution + 2, ii + resolution + 1);
     }
 
-    append_vertex(data, { inner_radius, 0.0f, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { outer_radius, 0.0f, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { inner_radius, 0.0f, half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { outer_radius, 0.0f, half_thickness }, -Vec3f::UnitY());
+    data.add_vertex(Vec3f(inner_radius, 0.0f, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(outer_radius, 0.0f, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(inner_radius, 0.0f, half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(outer_radius, 0.0f, half_thickness), (Vec3f)(-Vec3f::UnitY()));
 
     first_id = 26 + 6 * (resolution + 1);
-    append_triangle(data, first_id, first_id + 1, first_id + 3);
-    append_triangle(data, first_id, first_id + 3, first_id + 2);
+    data.add_triangle(first_id, first_id + 1, first_id + 3);
+    data.add_triangle(first_id, first_id + 3, first_id + 2);
 
-    for (short i = resolution; i >= 0; --i) {
+    for (int i = resolution; i >= 0; --i) {
         const float angle = float(i) * step_angle;
         const float c = ::cos(angle);
         const float s = ::sin(angle);
-        append_vertex(data, { outer_radius * s, outer_radius * c, -half_thickness }, { s, c, 0.0f });
+        data.add_vertex(Vec3f(outer_radius * s, outer_radius * c, -half_thickness), Vec3f(s, c, 0.0f));
     }
 
-    for (short i = resolution; i >= 0; --i) {
+    for (int i = resolution; i >= 0; --i) {
         const float angle = float(i) * step_angle;
         const float c = ::cos(angle);
         const float s = ::sin(angle);
-        append_vertex(data, { outer_radius * s, outer_radius * c, +half_thickness }, { s, c, 0.0f });
+        data.add_vertex(Vec3f(outer_radius * s, outer_radius * c, +half_thickness), Vec3f(s, c, 0.0f));
     }
 
     first_id = 30 + 6 * (resolution + 1);
-    for (unsigned short i = 0; i < resolution; ++i) {
-        const unsigned short ii = first_id + i;
-        append_triangle(data, ii, ii + 1, ii + resolution + 2);
-        append_triangle(data, ii, ii + resolution + 2, ii + resolution + 1);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        const unsigned int ii = first_id + i;
+        data.add_triangle(ii, ii + 1, ii + resolution + 2);
+        data.add_triangle(ii, ii + resolution + 2, ii + resolution + 1);
     }
 
     return data;
@@ -1160,7 +1042,7 @@ GLModel::Geometry circular_arrow(unsigned short resolution, float radius, float
 GLModel::Geometry straight_arrow(float tip_width, float tip_height, float stem_width, float stem_height, float thickness)
 {
     GLModel::Geometry data;
-    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::USHORT };
+    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     data.reserve_vertices(42);
     data.reserve_indices(72);
 
@@ -1170,122 +1052,121 @@ GLModel::Geometry straight_arrow(float tip_width, float tip_height, float stem_w
     const float total_height = tip_height + stem_height;
 
     // top face vertices
-    append_vertex(data, { half_stem_width, 0.0, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { half_stem_width, stem_height, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { half_tip_width, stem_height, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { 0.0, total_height, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { -half_tip_width, stem_height, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { -half_stem_width, stem_height, half_thickness }, Vec3f::UnitZ());
-    append_vertex(data, { -half_stem_width, 0.0, half_thickness }, Vec3f::UnitZ());
+    data.add_vertex(Vec3f(half_stem_width, 0.0f, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(half_stem_width, stem_height, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(half_tip_width, stem_height, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(0.0f, total_height, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(-half_tip_width, stem_height, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(-half_stem_width, stem_height, half_thickness), (Vec3f)Vec3f::UnitZ());
+    data.add_vertex(Vec3f(-half_stem_width, 0.0f, half_thickness), (Vec3f)Vec3f::UnitZ());
 
     // top face triangles
-    append_triangle(data, 0, 1, 6);
-    append_triangle(data, 6, 1, 5);
-    append_triangle(data, 4, 5, 3);
-    append_triangle(data, 5, 1, 3);
-    append_triangle(data, 1, 2, 3);
+    data.add_triangle(0, 1, 6);
+    data.add_triangle(6, 1, 5);
+    data.add_triangle(4, 5, 3);
+    data.add_triangle(5, 1, 3);
+    data.add_triangle(1, 2, 3);
 
     // bottom face vertices
-    append_vertex(data, { half_stem_width, 0.0, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { half_stem_width, stem_height, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { half_tip_width, stem_height, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { 0.0, total_height, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { -half_tip_width, stem_height, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { -half_stem_width, stem_height, -half_thickness }, -Vec3f::UnitZ());
-    append_vertex(data, { -half_stem_width, 0.0, -half_thickness }, -Vec3f::UnitZ());
+    data.add_vertex(Vec3f(half_stem_width, 0.0f, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(half_stem_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(half_tip_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(0.0f, total_height, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(-half_tip_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(-half_stem_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
+    data.add_vertex(Vec3f(-half_stem_width, 0.0f, -half_thickness), (Vec3f)(-Vec3f::UnitZ()));
 
     // bottom face triangles
-    append_triangle(data, 7, 13, 8);
-    append_triangle(data, 13, 12, 8);
-    append_triangle(data, 12, 11, 10);
-    append_triangle(data, 8, 12, 10);
-    append_triangle(data, 9, 8, 10);
+    data.add_triangle(7, 13, 8);
+    data.add_triangle(13, 12, 8);
+    data.add_triangle(12, 11, 10);
+    data.add_triangle(8, 12, 10);
+    data.add_triangle(9, 8, 10);
 
     // side faces vertices
-    append_vertex(data, { half_stem_width, 0.0, -half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { half_stem_width, stem_height, -half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { half_stem_width, 0.0, half_thickness }, Vec3f::UnitX());
-    append_vertex(data, { half_stem_width, stem_height, half_thickness }, Vec3f::UnitX());
+    data.add_vertex(Vec3f(half_stem_width, 0.0f, -half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(half_stem_width, stem_height, -half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(half_stem_width, 0.0f, half_thickness), (Vec3f)Vec3f::UnitX());
+    data.add_vertex(Vec3f(half_stem_width, stem_height, half_thickness), (Vec3f)Vec3f::UnitX());
 
-    append_vertex(data, { half_stem_width, stem_height, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { half_tip_width, stem_height, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { half_stem_width, stem_height, half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { half_tip_width, stem_height, half_thickness }, -Vec3f::UnitY());
+    data.add_vertex(Vec3f(half_stem_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(half_tip_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(half_stem_width, stem_height, half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(half_tip_width, stem_height, half_thickness), (Vec3f)(-Vec3f::UnitY()));
 
     Vec3f normal(tip_height, half_tip_width, 0.0f);
     normal.normalize();
-    append_vertex(data, { half_tip_width, stem_height, -half_thickness }, normal);
-    append_vertex(data, { 0.0, total_height, -half_thickness }, normal);
-    append_vertex(data, { half_tip_width, stem_height, half_thickness }, normal);
-    append_vertex(data, { 0.0, total_height, half_thickness }, normal);
+    data.add_vertex(Vec3f(half_tip_width, stem_height, -half_thickness), normal);
+    data.add_vertex(Vec3f(0.0f, total_height, -half_thickness), normal);
+    data.add_vertex(Vec3f(half_tip_width, stem_height, half_thickness), normal);
+    data.add_vertex(Vec3f(0.0f, total_height, half_thickness), normal);
 
     normal = { -tip_height, half_tip_width, 0.0f };
     normal.normalize();
-    append_vertex(data, { 0.0, total_height, -half_thickness }, normal);
-    append_vertex(data, { -half_tip_width, stem_height, -half_thickness }, normal);
-    append_vertex(data, { 0.0, total_height, half_thickness }, normal);
-    append_vertex(data, { -half_tip_width, stem_height, half_thickness }, normal);
+    data.add_vertex(Vec3f(0.0f, total_height, -half_thickness), normal);
+    data.add_vertex(Vec3f(-half_tip_width, stem_height, -half_thickness), normal);
+    data.add_vertex(Vec3f(0.0f, total_height, half_thickness), normal);
+    data.add_vertex(Vec3f(-half_tip_width, stem_height, half_thickness), normal);
 
-    append_vertex(data, { -half_tip_width, stem_height, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { -half_stem_width, stem_height, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { -half_tip_width, stem_height, half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { -half_stem_width, stem_height, half_thickness }, -Vec3f::UnitY());
+    data.add_vertex(Vec3f(-half_tip_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(-half_stem_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(-half_tip_width, stem_height, half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(-half_stem_width, stem_height, half_thickness), (Vec3f)(-Vec3f::UnitY()));
 
-    append_vertex(data, { -half_stem_width, stem_height, -half_thickness }, -Vec3f::UnitX());
-    append_vertex(data, { -half_stem_width, 0.0, -half_thickness }, -Vec3f::UnitX());
-    append_vertex(data, { -half_stem_width, stem_height, half_thickness }, -Vec3f::UnitX());
-    append_vertex(data, { -half_stem_width, 0.0, half_thickness }, -Vec3f::UnitX());
+    data.add_vertex(Vec3f(-half_stem_width, stem_height, -half_thickness), (Vec3f)(-Vec3f::UnitX()));
+    data.add_vertex(Vec3f(-half_stem_width, 0.0f, -half_thickness), (Vec3f)(-Vec3f::UnitX()));
+    data.add_vertex(Vec3f(-half_stem_width, stem_height, half_thickness), (Vec3f)(-Vec3f::UnitX()));
+    data.add_vertex(Vec3f(-half_stem_width, 0.0f, half_thickness), (Vec3f)(-Vec3f::UnitX()));
 
-    append_vertex(data, { -half_stem_width, 0.0, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { half_stem_width, 0.0, -half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { -half_stem_width, 0.0, half_thickness }, -Vec3f::UnitY());
-    append_vertex(data, { half_stem_width, 0.0, half_thickness }, -Vec3f::UnitY());
+    data.add_vertex(Vec3f(-half_stem_width, 0.0f, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(half_stem_width, 0.0f, -half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(-half_stem_width, 0.0f, half_thickness), (Vec3f)(-Vec3f::UnitY()));
+    data.add_vertex(Vec3f(half_stem_width, 0.0f, half_thickness), (Vec3f)(-Vec3f::UnitY()));
 
     // side face triangles
-    for (unsigned short i = 0; i < 7; ++i) {
-        const unsigned short ii = i * 4;
-        append_triangle(data, 14 + ii, 15 + ii, 17 + ii);
-        append_triangle(data, 14 + ii, 17 + ii, 16 + ii);
+    for (unsigned int i = 0; i < 7; ++i) {
+        const unsigned int ii = i * 4;
+        data.add_triangle(14 + ii, 15 + ii, 17 + ii);
+        data.add_triangle(14 + ii, 17 + ii, 16 + ii);
     }
 
     return data;
 }
 
-GLModel::Geometry diamond(unsigned short resolution)
+GLModel::Geometry diamond(unsigned int resolution)
 {
-    resolution = std::max<unsigned short>(4, resolution);
-    resolution = std::min<unsigned short>(65534, resolution); // ensure no unsigned short overflow of indices
+    resolution = std::max<unsigned int>(4, resolution);
 
     GLModel::Geometry data;
-    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::USHORT };
+    data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     data.reserve_vertices(resolution + 2);
     data.reserve_indices((2 * (resolution + 1)) * 3);
 
     const float step = 2.0f * float(PI) / float(resolution);
 
     // vertices
-    for (unsigned short i = 0; i < resolution; ++i) {
-        float ii = float(i) * step;
+    for (unsigned int i = 0; i < resolution; ++i) {
+        const float ii = float(i) * step;
         const Vec3f p = { 0.5f * ::cos(ii), 0.5f * ::sin(ii), 0.0f };
-        append_vertex(data, p, p.normalized());
+        data.add_vertex(p, (Vec3f)p.normalized());
     }
     Vec3f p = { 0.0f, 0.0f, 0.5f };
-    append_vertex(data, p, p.normalized());
+    data.add_vertex(p, (Vec3f)p.normalized());
     p = { 0.0f, 0.0f, -0.5f };
-    append_vertex(data, p, p.normalized());
+    data.add_vertex(p, (Vec3f)p.normalized());
 
     // triangles
     // top
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_triangle(data, i + 0, i + 1, resolution);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_triangle(i + 0, i + 1, resolution);
     }
-    append_triangle(data, resolution - 1, 0, resolution);
+    data.add_triangle(resolution - 1, 0, resolution);
 
     // bottom
-    for (unsigned short i = 0; i < resolution; ++i) {
-        append_triangle(data, i + 0, resolution + 1, i + 1);
+    for (unsigned int i = 0; i < resolution; ++i) {
+        data.add_triangle(i + 0, resolution + 1, i + 1);
     }
-    append_triangle(data, resolution - 1, resolution + 1, 0);
+    data.add_triangle(resolution - 1, resolution + 1, 0);
 
     return data;
 }

src/slic3r/GUI/GLModel.hpp

@@ -46,23 +46,25 @@ namespace GUI {
             enum class EIndexType : unsigned char
             {
                 UINT,   // unsigned int
-                USHORT  // unsigned short
+                USHORT, // unsigned short
+                UBYTE   // unsigned byte
             };
 
             struct Format
             {
                 EPrimitiveType type{ EPrimitiveType::Triangles };
                 EVertexLayout vertex_layout{ EVertexLayout::P3N3 };
-                EIndexType index_type{ EIndexType::UINT };
             };
 
             Format format;
             std::vector<float> vertices;
-            std::vector<unsigned char> indices;
+            std::vector<unsigned int> indices;
+            EIndexType index_type{ EIndexType::UINT };
             ColorRGBA color{ ColorRGBA::BLACK() };
 
-            void reserve_vertices(size_t vertices_count);
-            void reserve_indices(size_t indices_count);
+            void reserve_vertices(size_t vertices_count) { vertices.reserve(vertices_count * vertex_stride_floats(format)); }
+            void reserve_indices(size_t indices_count) { indices.reserve(indices_count * index_stride_bytes(*this)); }
+
 
             void add_vertex(const Vec2f& position);                          // EVertexLayout::P2
             void add_vertex(const Vec2f& position, const Vec2f& tex_coord);  // EVertexLayout::P2T2
@@ -72,36 +74,29 @@ namespace GUI {
 
             void set_vertex(size_t id, const Vec3f& position, const Vec3f& normal); // EVertexLayout::P3N3
 
-            void set_ushort_index(size_t id, unsigned short index);
-            void set_uint_index(size_t id, unsigned int index);
+            void set_index(size_t id, unsigned int index);
 
-            void add_ushort_index(unsigned short id);
-            void add_uint_index(unsigned int id);
-
-            void add_ushort_line(unsigned short id1, unsigned short id2);
-            void add_uint_line(unsigned int id1, unsigned int id2);
-
-            void add_ushort_triangle(unsigned short id1, unsigned short id2, unsigned short id3);
-            void add_uint_triangle(unsigned int id1, unsigned int id2, unsigned int id3);
+            void add_index(unsigned int id);
+            void add_line(unsigned int id1, unsigned int id2);
+            void add_triangle(unsigned int id1, unsigned int id2, unsigned int id3);
 
             Vec2f extract_position_2(size_t id) const;
             Vec3f extract_position_3(size_t id) const;
             Vec3f extract_normal_3(size_t id) const;
             Vec2f extract_tex_coord_2(size_t id) const;
 
-            unsigned int extract_uint_index(size_t id) const;
-            unsigned short extract_ushort_index(size_t id) const;
+            unsigned int extract_index(size_t id) const;
 
             void remove_vertex(size_t id);
 
             bool is_empty() const { return vertices_count() == 0 || indices_count() == 0; }
 
             size_t vertices_count() const { return vertices.size() / vertex_stride_floats(format); }
-            size_t indices_count() const  { return indices.size() / index_stride_bytes(format); }
+            size_t indices_count() const { return indices.size(); }
 
             size_t vertices_size_floats() const { return vertices.size(); }
             size_t vertices_size_bytes() const  { return vertices_size_floats() * sizeof(float); }
-            size_t indices_size_bytes() const   { return indices.size(); }
+            size_t indices_size_bytes() const { return indices.size() * index_stride_bytes(*this); }
 
             static size_t vertex_stride_floats(const Format& format);
             static size_t vertex_stride_bytes(const Format& format) { return vertex_stride_floats(format) * sizeof(float); }
@@ -121,9 +116,7 @@ namespace GUI {
             static size_t tex_coord_offset_floats(const Format& format);
             static size_t tex_coord_offset_bytes(const Format& format) { return tex_coord_offset_floats(format) * sizeof(float); }
 
-            static size_t index_stride_bytes(const Format& format);
-
-            static EIndexType index_type(size_t vertices_count);
+            static size_t index_stride_bytes(const Geometry& data);
 
             static bool has_position(const Format& format);
             static bool has_normal(const Format& format);
@@ -164,9 +157,10 @@ namespace GUI {
         size_t vertices_size_floats() const { return vertices_count() * Geometry::vertex_stride_floats(m_render_data.geometry.format); }
         size_t vertices_size_bytes() const  { return vertices_size_floats() * sizeof(float); }
 
-        size_t indices_size_bytes() const { return indices_count() * Geometry::index_stride_bytes(m_render_data.geometry.format); }
+        size_t indices_size_bytes() const { return indices_count() * Geometry::index_stride_bytes(m_render_data.geometry); }
 
         const Geometry& get_geometry() const { return m_render_data.geometry; }
+
         void init_from(Geometry&& data);
         void init_from(const TriangleMesh& mesh);
         void init_from(const indexed_triangle_set& its);
@@ -217,13 +211,13 @@ namespace GUI {
     // the origin of the arrow is in the center of the stem cap
     // the arrow has its axis of symmetry along the Z axis and is pointing upward
     // used to render bed axes and sequential marker
-    GLModel::Geometry stilized_arrow(unsigned short resolution, float tip_radius, float tip_height, float stem_radius, float stem_height);
+    GLModel::Geometry stilized_arrow(unsigned int resolution, float tip_radius, float tip_height, float stem_radius, float stem_height);
 
     // create an arrow whose stem is a quarter of circle, with the given dimensions and resolution
     // the origin of the arrow is in the center of the circle
     // the arrow is contained in the 1st quadrant of the XY plane and is pointing counterclockwise
     // used to render sidebar hints for rotations
-    GLModel::Geometry circular_arrow(unsigned short resolution, float radius, float tip_height, float tip_width, float stem_width, float thickness);
+    GLModel::Geometry circular_arrow(unsigned int resolution, float radius, float tip_height, float tip_width, float stem_width, float thickness);
 
     // create an arrow with the given dimensions
     // the origin of the arrow is in the center of the stem cap
@@ -234,7 +228,7 @@ namespace GUI {
     // create a diamond with the given resolution
     // the origin of the diamond is in its center
     // the diamond is contained into a box with size [1, 1, 1]
-    GLModel::Geometry diamond(unsigned short resolution);
+    GLModel::Geometry diamond(unsigned int resolution);
 
 } // namespace GUI
 } // namespace Slic3r

src/slic3r/GUI/GLSelectionRectangle.cpp

@@ -74,40 +74,28 @@ namespace GUI {
         if (!is_dragging())
             return;
 
-        const Camera& camera = wxGetApp().plater()->get_camera();
-        float inv_zoom = (float)camera.get_inv_zoom();
-
-        Size cnv_size = canvas.get_canvas_size();
-        float cnv_half_width = 0.5f * (float)cnv_size.get_width();
-        float cnv_half_height = 0.5f * (float)cnv_size.get_height();
-        if (cnv_half_width == 0.0f || cnv_half_height == 0.0f)
+        const Size cnv_size = canvas.get_canvas_size();
+        const float cnv_width = (float)cnv_size.get_width();
+        const float cnv_height = (float)cnv_size.get_height();
+        if (cnv_width == 0.0f || cnv_height == 0.0f)
             return;
 
-        Vec2d start(m_start_corner(0) - cnv_half_width, cnv_half_height - m_start_corner(1));
-        Vec2d end(m_end_corner(0) - cnv_half_width, cnv_half_height - m_end_corner(1));
-
-        const float left = (float)std::min(start(0), end(0)) * inv_zoom;
-        const float top = (float)std::max(start(1), end(1)) * inv_zoom;
-        const float right = (float)std::max(start(0), end(0)) * inv_zoom;
-        const float bottom = (float)std::min(start(1), end(1)) * inv_zoom;
+        const float cnv_inv_width = 1.0f / cnv_width;
+        const float cnv_inv_height = 1.0f / cnv_height;
+        const float left = 2.0f * (get_left() * cnv_inv_width - 0.5f);
+        const float right = 2.0f * (get_right() * cnv_inv_width - 0.5f);
+        const float top = -2.0f * (get_top() * cnv_inv_height - 0.5f);
+        const float bottom = -2.0f * (get_bottom() * cnv_inv_height - 0.5f);
         
         glsafe(::glLineWidth(1.5f));
 
         glsafe(::glDisable(GL_DEPTH_TEST));
 
-        glsafe(::glPushMatrix());
-        glsafe(::glLoadIdentity());
-        // ensure that the rectangle is renderered inside the frustrum
-        glsafe(::glTranslated(0.0, 0.0, -(camera.get_near_z() + 0.5)));
-        // ensure that the overlay fits the frustrum near z plane
-        const double gui_scale = camera.get_gui_scale();
-        glsafe(::glScaled(gui_scale, gui_scale, 1.0));
-
         glsafe(::glPushAttrib(GL_ENABLE_BIT));
         glsafe(::glLineStipple(4, 0xAAAA));
         glsafe(::glEnable(GL_LINE_STIPPLE));
 
-        GLShaderProgram* shader = wxGetApp().get_shader("flat");
+        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
         if (shader != nullptr) {
             shader->start_using();
 
@@ -117,7 +105,7 @@ namespace GUI {
                 m_rectangle.reset();
 
                 GLModel::Geometry init_data;
-                init_data.format = { GLModel::Geometry::EPrimitiveType::LineLoop, GLModel::Geometry::EVertexLayout::P2, GLModel::Geometry::EIndexType::USHORT };
+                init_data.format = { GLModel::Geometry::EPrimitiveType::LineLoop, GLModel::Geometry::EVertexLayout::P2 };
                 init_data.reserve_vertices(4);
                 init_data.reserve_indices(4);
 
@@ -128,23 +116,23 @@ namespace GUI {
                 init_data.add_vertex(Vec2f(left, top));
 
                 // indices
-                init_data.add_ushort_index(0);
-                init_data.add_ushort_index(1);
-                init_data.add_ushort_index(2);
-                init_data.add_ushort_index(3);
+                init_data.add_index(0);
+                init_data.add_index(1);
+                init_data.add_index(2);
+                init_data.add_index(3);
 
                 m_rectangle.init_from(std::move(init_data));
             }
 
-            const ColorRGBA color(0.0f, 1.0f, 0.38f, 1.0f);
-            m_rectangle.set_color(color);
+            shader->set_uniform("view_model_matrix", Transform3d::Identity());
+            shader->set_uniform("projection_matrix", Transform3d::Identity());
+
+            m_rectangle.set_color({0.0f, 1.0f, 0.38f, 1.0f});
             m_rectangle.render();
             shader->stop_using();
         }
 
         glsafe(::glPopAttrib());
-
-        glsafe(::glPopMatrix());
     }
 
 } // namespace GUI

src/slic3r/GUI/GLSelectionRectangle.hpp

@@ -36,12 +36,12 @@ public:
     bool is_dragging() const { return m_state != Off; }
     EState get_state() const { return m_state; }
 
-    float get_width() const { return std::abs(m_start_corner(0) - m_end_corner(0)); }
-    float get_height() const { return std::abs(m_start_corner(1) - m_end_corner(1)); }
-    float get_left() const { return std::min(m_start_corner(0), m_end_corner(0)); }
-    float get_right() const { return std::max(m_start_corner(0), m_end_corner(0)); }
-    float get_top() const { return std::max(m_start_corner(1), m_end_corner(1)); }
-    float get_bottom() const { return std::min(m_start_corner(1), m_end_corner(1)); }
+    float get_width() const  { return std::abs(m_start_corner.x() - m_end_corner.x()); }
+    float get_height() const { return std::abs(m_start_corner.y() - m_end_corner.y()); }
+    float get_left() const   { return std::min(m_start_corner.x(), m_end_corner.x()); }
+    float get_right() const  { return std::max(m_start_corner.x(), m_end_corner.x()); }
+    float get_top() const    { return std::max(m_start_corner.y(), m_end_corner.y()); }
+    float get_bottom() const { return std::min(m_start_corner.y(), m_end_corner.y()); }
 
 private:
     EState m_state{ Off };

src/slic3r/GUI/GLShader.cpp

@@ -296,6 +296,11 @@ void GLShaderProgram::set_uniform(int id, const Matrix3f& value) const
         glsafe(::glUniformMatrix3fv(id, 1, GL_FALSE, static_cast<const GLfloat*>(value.data())));
 }
 
+void GLShaderProgram::set_uniform(int id, const Matrix3d& value) const
+{
+    set_uniform(id, (Matrix3f)value.cast<float>());
+}
+
 void GLShaderProgram::set_uniform(int id, const Vec3f& value) const
 {
     if (id >= 0)

src/slic3r/GUI/GLShader.hpp

@@ -60,6 +60,7 @@ public:
     void set_uniform(const char* name, const Transform3f& value) const { set_uniform(get_uniform_location(name), value); }
     void set_uniform(const char* name, const Transform3d& value) const { set_uniform(get_uniform_location(name), value); }
     void set_uniform(const char* name, const Matrix3f& value) const { set_uniform(get_uniform_location(name), value); }
+    void set_uniform(const char* name, const Matrix3d& value) const { set_uniform(get_uniform_location(name), value); }
     void set_uniform(const char* name, const Vec3f& value) const { set_uniform(get_uniform_location(name), value); }
     void set_uniform(const char* name, const Vec3d& value) const { set_uniform(get_uniform_location(name), value); }
     void set_uniform(const char* name, const ColorRGB& value) const { set_uniform(get_uniform_location(name), value); }
@@ -79,6 +80,7 @@ public:
     void set_uniform(int id, const Transform3f& value) const;
     void set_uniform(int id, const Transform3d& value) const;
     void set_uniform(int id, const Matrix3f& value) const;
+    void set_uniform(int id, const Matrix3d& value) const;
     void set_uniform(int id, const Vec3f& value) const;
     void set_uniform(int id, const Vec3d& value) const;
     void set_uniform(int id, const ColorRGB& value) const;

src/slic3r/GUI/GLShadersManager.cpp

@@ -34,25 +34,22 @@ std::pair<bool, std::string> GLShadersManager::init()
     bool valid = true;
 
     // basic shader, used to render all what was previously rendered using the immediate mode
-    valid &= append_shader("flat", { "flat.vs", "flat.fs" });
     valid &= append_shader("flat_attr", { "flat_attr.vs", "flat.fs" });
     // basic shader for textures, used to render textures
-    valid &= append_shader("flat_texture", { "flat_texture.vs", "flat_texture.fs" });
+    valid &= append_shader("flat_texture_attr", { "flat_texture_attr.vs", "flat_texture.fs" });
     // used to render 3D scene background
-    valid &= append_shader("background", { "background.vs", "background.fs" });
+    valid &= append_shader("background_attr", { "background_attr.vs", "background.fs" });
     // used to render bed axes and model, selection hints, gcode sequential view marker model, preview shells, options in gcode preview
-   valid &= append_shader("gouraud_light", { "gouraud_light.vs", "gouraud_light.fs" });
+    valid &= append_shader("gouraud_light_attr", { "gouraud_light_attr.vs", "gouraud_light.fs" });
     //used to render thumbnail
+    valid &= append_shader("thumbnail_attr", {"thumbnail_attr.vs", "thumbnail.fs"});
     valid &= append_shader("thumbnail", {"thumbnail.vs", "thumbnail.fs"});
-   // used to render first layer for calibration
-   valid &= append_shader("cali", { "cali.vs", "cali.fs"});
     // used to render printbed
-    valid &= append_shader("printbed", { "printbed.vs", "printbed.fs" });
+    valid &= append_shader("printbed_attr", { "printbed_attr.vs", "printbed.fs" });
     // used to render options in gcode preview
-    if (GUI::wxGetApp().is_gl_version_greater_or_equal_to(3, 3))
-        valid &= append_shader("gouraud_light_instanced", { "gouraud_light_instanced.vs", "gouraud_light_instanced.fs" });
-    // used to render extrusion and travel paths as lines in gcode preview
-    valid &= append_shader("toolpaths_lines", { "toolpaths_lines.vs", "toolpaths_lines.fs" });
+    if (GUI::wxGetApp().is_gl_version_greater_or_equal_to(3, 3)) {
+        valid &= append_shader("gouraud_light_instanced_attr", { "gouraud_light_instanced_attr.vs", "gouraud_light_instanced.fs" });
+    }
 
     // used to render objects in 3d editor
     //if (GUI::wxGetApp().is_gl_version_greater_or_equal_to(3, 0)) {
@@ -64,34 +61,26 @@ std::pair<bool, std::string> GLShadersManager::init()
             );
     }
     else {
-        valid &= append_shader("gouraud", { "gouraud.vs", "gouraud.fs" }
+        valid &= append_shader("gouraud_attr", { "gouraud_attr.vs", "gouraud.fs" }
 #if ENABLE_ENVIRONMENT_MAP
         , { "ENABLE_ENVIRONMENT_MAP"sv }
 #endif // ENABLE_ENVIRONMENT_MAP
         );
     }
     // used to render variable layers heights in 3d editor
-    valid &= append_shader("variable_layer_height", { "variable_layer_height.vs", "variable_layer_height.fs" });
+    valid &= append_shader("variable_layer_height_attr", { "variable_layer_height_attr.vs", "variable_layer_height.fs" });
     // used to render highlight contour around selected triangles inside the multi-material gizmo
-    valid &= append_shader("mm_contour", { "mm_contour.vs", "mm_contour.fs" });
+    valid &= append_shader("mm_contour_attr", { "mm_contour_attr.vs", "mm_contour_attr.fs" });
     // Used to render painted triangles inside the multi-material gizmo. Triangle normals are computed inside fragment shader.
     // For Apple's on Arm CPU computed triangle normals inside fragment shader using dFdx and dFdy has the opposite direction.
     // Because of this, objects had darker colors inside the multi-material gizmo.
     // Based on https://stackoverflow.com/a/66206648, the similar behavior was also spotted on some other devices with Arm CPU.
     // Since macOS 12 (Monterey), this issue with the opposite direction on Apple's Arm CPU seems to be fixed, and computed
     // triangle normals inside fragment shader have the right direction.
-    if (platform_flavor() == PlatformFlavor::OSXOnArm && wxPlatformInfo::Get().GetOSMajorVersion() < 12) {
-        //if (GUI::wxGetApp().plater() && GUI::wxGetApp().plater()->is_wireframe_enabled())
-        //    valid &= append_shader("mm_gouraud", {"mm_gouraud_wireframe.vs", "mm_gouraud_wireframe.fs"}, {"FLIP_TRIANGLE_NORMALS"sv});
-        //else
-            valid &= append_shader("mm_gouraud", {"mm_gouraud.vs", "mm_gouraud.fs"}, {"FLIP_TRIANGLE_NORMALS"sv});
-    }
-    else {
-        //if (GUI::wxGetApp().plater() && GUI::wxGetApp().plater()->is_wireframe_enabled())
-        //    valid &= append_shader("mm_gouraud", {"mm_gouraud_wireframe.vs", "mm_gouraud_wireframe.fs"});
-        //else
-            valid &= append_shader("mm_gouraud", {"mm_gouraud.vs", "mm_gouraud.fs"});
-    }
+    if (platform_flavor() == PlatformFlavor::OSXOnArm && wxPlatformInfo::Get().GetOSMajorVersion() < 12)
+        valid &= append_shader("mm_gouraud_attr", { "mm_gouraud_attr.vs", "mm_gouraud_attr.fs" }, { "FLIP_TRIANGLE_NORMALS"sv });
+    else
+        valid &= append_shader("mm_gouraud_attr", { "mm_gouraud_attr.vs", "mm_gouraud_attr.fs" });
 
     //BBS: add shader for outline
     valid &= append_shader("outline", { "outline.vs", "outline.fs" });

src/slic3r/GUI/GLTexture.cpp

@@ -663,7 +663,7 @@ void GLTexture::render_sub_texture(unsigned int tex_id, float left, float right,
     glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)tex_id));
 
     GLModel::Geometry init_data;
-    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P2T2, GLModel::Geometry::EIndexType::USHORT };
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P2T2 };
     init_data.reserve_vertices(4);
     init_data.reserve_indices(6);
 
@@ -674,15 +674,17 @@ void GLTexture::render_sub_texture(unsigned int tex_id, float left, float right,
     init_data.add_vertex(Vec2f(left, top),     Vec2f(uvs.left_top.u, uvs.left_top.v));
 
     // indices
-    init_data.add_ushort_triangle(0, 1, 2);
-    init_data.add_ushort_triangle(2, 3, 0);
+    init_data.add_triangle(0, 1, 2);
+    init_data.add_triangle(2, 3, 0);
 
     GLModel model;
     model.init_from(std::move(init_data));
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_texture");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_texture_attr");
     if (shader != nullptr) {
         shader->start_using();
+        shader->set_uniform("view_model_matrix", Transform3d::Identity());
+        shader->set_uniform("projection_matrix", Transform3d::Identity());
         model.render();
         shader->stop_using();
     }

src/slic3r/GUI/GLToolbar.cpp

@@ -555,14 +555,12 @@ void GLToolbar::render(const GLCanvas3D& parent,GLToolbarItem::EType type)
     }
 }
 
-
-
 bool GLToolbar::on_mouse(wxMouseEvent& evt, GLCanvas3D& parent)
 {
     if (!m_enabled)
         return false;
 
-    Vec2d mouse_pos((double)evt.GetX(), (double)evt.GetY());
+    const Vec2d mouse_pos((double)evt.GetX(), (double)evt.GetY());
     bool processed = false;
 
     // mouse anywhere
@@ -610,7 +608,7 @@ bool GLToolbar::on_mouse(wxMouseEvent& evt, GLCanvas3D& parent)
             return false;
     }
 
-    int item_id = contains_mouse(mouse_pos, parent);
+    const int item_id = contains_mouse(mouse_pos, parent);
     if (item_id != -1) {
         // mouse inside toolbar
         if (evt.LeftDown() || evt.LeftDClick()) {
@@ -757,16 +755,12 @@ int GLToolbar::get_visible_items_cnt() const
 
 void GLToolbar::do_action(GLToolbarItem::EActionType type, int item_id, GLCanvas3D& parent, bool check_hover)
 {
-    if ((m_pressed_toggable_id == -1) || (m_pressed_toggable_id == item_id))
-    {
-        if ((0 <= item_id) && (item_id < (int)m_items.size()))
-        {
+    if (m_pressed_toggable_id == -1 || m_pressed_toggable_id == item_id) {
+        if (0 <= item_id && item_id < (int)m_items.size()) {
             GLToolbarItem* item = m_items[item_id];
-            if ((item != nullptr) && !item->is_separator() && !item->is_disabled() && (!check_hover || item->is_hovered()))
-            {
-                if (((type == GLToolbarItem::Right) && item->is_right_toggable()) ||
-                    ((type == GLToolbarItem::Left) && item->is_left_toggable()))
-                {
+            if (item != nullptr && !item->is_separator() && !item->is_disabled() && (!check_hover || item->is_hovered())) {
+                if ((type == GLToolbarItem::Right && item->is_right_toggable()) ||
+                    (type == GLToolbarItem::Left && item->is_left_toggable())) {
                     GLToolbarItem::EState state = item->get_state();
                     if (state == GLToolbarItem::Hover)
                         item->set_state(GLToolbarItem::HoverPressed);
@@ -788,8 +782,7 @@ void GLToolbar::do_action(GLToolbarItem::EActionType type, int item_id, GLCanvas
                     case GLToolbarItem::Right: { item->do_right_action(); break; }
                     }
                 }
-                else
-                {
+                else {
                     if (m_type == Radio)
                         select_item(item->get_name());
                     else
@@ -804,8 +797,7 @@ void GLToolbar::do_action(GLToolbarItem::EActionType type, int item_id, GLCanvas
                     case GLToolbarItem::Right: { item->do_right_action(); break; }
                     }
 
-                    if ((m_type == Normal) && (item->get_state() != GLToolbarItem::Disabled))
-                    {
+                    if (m_type == Normal && item->get_state() != GLToolbarItem::Disabled) {
                         // the item may get disabled during the action, if not, set it back to normal state
                         item->set_state(GLToolbarItem::Normal);
                         parent.render();
@@ -831,49 +823,45 @@ void GLToolbar::update_hover_state(const Vec2d& mouse_pos, GLCanvas3D& parent)
 
 void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLCanvas3D& parent)
 {
-    // NB: mouse_pos is already scaled appropriately
+    const Size cnv_size = parent.get_canvas_size();
+    const Vec2d scaled_mouse_pos((mouse_pos.x() - 0.5 * (double)cnv_size.get_width()), (0.5 * (double)cnv_size.get_height() - mouse_pos.y()));
 
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-    float factor = m_layout.scale * inv_zoom;
+    const float icons_size = m_layout.icons_size * m_layout.scale;
+    const float separator_size = m_layout.separator_size * m_layout.scale;
+    const float gap_size = m_layout.gap_size * m_layout.scale;
+    const float border = m_layout.border * m_layout.scale;
 
-    Size cnv_size = parent.get_canvas_size();
-    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+    const float separator_stride = separator_size + gap_size;
+    const float icon_stride = icons_size + gap_size;
 
-    float scaled_icons_size = m_layout.icons_size * factor;
-    float scaled_separator_size = m_layout.separator_size * factor;
-    float scaled_gap_size = m_layout.gap_size * factor;
-    float scaled_border = m_layout.border * factor;
+    float left = m_layout.left + border;
+    float top  = m_layout.top - border;
 
-    float separator_stride = scaled_separator_size + scaled_gap_size;
-    float icon_stride = scaled_icons_size + scaled_gap_size;
-
-    float left = m_layout.left + scaled_border;
-    float top = m_layout.top - scaled_border;
-
-    for (GLToolbarItem* item : m_items)
-    {
+    for (GLToolbarItem* item : m_items) {
         if (!item->is_visible())
             continue;
 
         if (item->is_separator())
             left += separator_stride;
-        else
-        {
-            float right = left + scaled_icons_size;
-            float bottom = top - scaled_icons_size;
+        else {
+            float right = left + icons_size;
+            const float bottom = top - icons_size;
 
             //BBS: GUI refactor: GLToolbar
             if (item->is_action_with_text())
-                right += scaled_icons_size * item->get_extra_size_ratio();
-            GLToolbarItem::EState state = item->get_state();
-            bool inside = (left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top);
+                right += icons_size * item->get_extra_size_ratio();
+
+            const GLToolbarItem::EState state = item->get_state();
+            bool inside = (left <= (float)scaled_mouse_pos.x()) &&
+                          ((float)scaled_mouse_pos.x() <= right) &&
+                          (bottom <= (float)scaled_mouse_pos.y()) &&
+                          ((float)scaled_mouse_pos.y() <= top);
 
             switch (state)
             {
             case GLToolbarItem::Normal:
             {
-                if (inside)
-                {
+                if (inside) {
                     item->set_state(GLToolbarItem::Hover);
                     parent.set_as_dirty();
                 }
@@ -882,8 +870,7 @@ void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLCanvas3D
             }
             case GLToolbarItem::Hover:
             {
-                if (!inside)
-                {
+                if (!inside) {
                     item->set_state(GLToolbarItem::Normal);
                     parent.set_as_dirty();
                 }
@@ -892,8 +879,7 @@ void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLCanvas3D
             }
             case GLToolbarItem::Pressed:
             {
-                if (inside)
-                {
+                if (inside) {
                     item->set_state(GLToolbarItem::HoverPressed);
                     parent.set_as_dirty();
                 }
@@ -902,8 +888,7 @@ void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLCanvas3D
             }
             case GLToolbarItem::HoverPressed:
             {
-                if (!inside)
-                {
+                if (!inside) {
                     item->set_state(GLToolbarItem::Pressed);
                     parent.set_as_dirty();
                 }
@@ -912,8 +897,7 @@ void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLCanvas3D
             }
             case GLToolbarItem::Disabled:
             {
-                if (inside)
-                {
+                if (inside) {
                     item->set_state(GLToolbarItem::HoverDisabled);
                     parent.set_as_dirty();
                 }
@@ -922,8 +906,7 @@ void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLCanvas3D
             }
             case GLToolbarItem::HoverDisabled:
             {
-                if (!inside)
-                {
+                if (!inside) {
                     item->set_state(GLToolbarItem::Disabled);
                     parent.set_as_dirty();
                 }
@@ -939,59 +922,55 @@ void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos, GLCanvas3D
             left += icon_stride;
             //BBS: GUI refactor: GLToolbar
             if (item->is_action_with_text())
-                left += scaled_icons_size * item->get_extra_size_ratio();
+                left += icons_size * item->get_extra_size_ratio();
         }
     }
 }
 
 void GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos, GLCanvas3D& parent)
 {
-    // NB: mouse_pos is already scaled appropriately
+    const Size cnv_size = parent.get_canvas_size();
+    const Vec2d scaled_mouse_pos((mouse_pos.x() - 0.5 * (double)cnv_size.get_width()), (0.5 * (double)cnv_size.get_height() - mouse_pos.y()));
 
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-    float factor = m_layout.scale * inv_zoom;
+    const float icons_size = m_layout.icons_size * m_layout.scale;
+    const float separator_size = m_layout.separator_size * m_layout.scale;
+    const float gap_size = m_layout.gap_size * m_layout.scale;
+    const float border = m_layout.border * m_layout.scale;
 
-    Size cnv_size = parent.get_canvas_size();
-    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+    const float separator_stride = separator_size + gap_size;
+    const float icon_stride = icons_size + gap_size;
 
-    float scaled_icons_size = m_layout.icons_size * factor;
-    float scaled_separator_size = m_layout.separator_size * factor;
-    float scaled_gap_size = m_layout.gap_size * factor;
-    float scaled_border = m_layout.border * factor;
-    float separator_stride = scaled_separator_size + scaled_gap_size;
-    float icon_stride = scaled_icons_size + scaled_gap_size;
+    float left = m_layout.left + border;
+    float top  = m_layout.top - border;
 
-    float left = m_layout.left + scaled_border;
-    float top = m_layout.top - scaled_border;
-
-    for (GLToolbarItem* item : m_items)
-    {
+    for (GLToolbarItem* item : m_items) {
         if (!item->is_visible())
             continue;
 
         if (item->is_separator())
             top -= separator_stride;
-        else
-        {
-            float right = left + scaled_icons_size;
-            float bottom = top - scaled_icons_size;
+        else {
+            float right  = left + icons_size;
+            const float bottom = top - icons_size;
 
             if (item->is_action_with_text_image())
-                right += m_layout.text_size * factor;
+                right += m_layout.text_size * m_layout.scale;
 
             //BBS: GUI refactor: GLToolbar
             if (item->is_action_with_text())
-                right += scaled_icons_size * item->get_extra_size_ratio();
+                right += icons_size * item->get_extra_size_ratio();
 
             GLToolbarItem::EState state = item->get_state();
-            bool inside = (left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top);
+            const bool inside = (left <= (float)scaled_mouse_pos.x()) &&
+                                ((float)scaled_mouse_pos.x() <= right) &&
+                                (bottom <= (float)scaled_mouse_pos.y()) &&
+                                ((float)scaled_mouse_pos.y() <= top);
 
             switch (state)
             {
             case GLToolbarItem::Normal:
             {
-                if (inside)
-                {
+                if (inside) {
                     item->set_state(GLToolbarItem::Hover);
                     parent.set_as_dirty();
                 }
@@ -1000,8 +979,7 @@ void GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos, GLCanvas3D&
             }
             case GLToolbarItem::Hover:
             {
-                if (!inside)
-                {
+                if (!inside) {
                     item->set_state(GLToolbarItem::Normal);
                     parent.set_as_dirty();
                 }
@@ -1010,8 +988,7 @@ void GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos, GLCanvas3D&
             }
             case GLToolbarItem::Pressed:
             {
-                if (inside)
-                {
+                if (inside) {
                     item->set_state(GLToolbarItem::HoverPressed);
                     parent.set_as_dirty();
                 }
@@ -1020,8 +997,7 @@ void GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos, GLCanvas3D&
             }
             case GLToolbarItem::HoverPressed:
             {
-                if (!inside)
-                {
+                if (!inside) {
                     item->set_state(GLToolbarItem::Pressed);
                     parent.set_as_dirty();
                 }
@@ -1030,8 +1006,7 @@ void GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos, GLCanvas3D&
             }
             case GLToolbarItem::Disabled:
             {
-                if (inside)
-                {
+                if (inside) {
                     item->set_state(GLToolbarItem::HoverDisabled);
                     parent.set_as_dirty();
                 }
@@ -1040,8 +1015,7 @@ void GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos, GLCanvas3D&
             }
             case GLToolbarItem::HoverDisabled:
             {
-                if (!inside)
-                {
+                if (!inside) {
                     item->set_state(GLToolbarItem::Disabled);
                     parent.set_as_dirty();
                 }
@@ -1089,71 +1063,72 @@ int GLToolbar::contains_mouse(const Vec2d& mouse_pos, const GLCanvas3D& parent)
 
 int GLToolbar::contains_mouse_horizontal(const Vec2d& mouse_pos, const GLCanvas3D& parent) const
 {
-    // NB: mouse_pos is already scaled appropriately
+    const Size cnv_size = parent.get_canvas_size();
+    const Vec2d scaled_mouse_pos((mouse_pos.x() - 0.5 * (double)cnv_size.get_width()), (0.5 * (double)cnv_size.get_height() - mouse_pos.y()));
 
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-    float factor = m_layout.scale * inv_zoom;
+    const float icons_size = m_layout.icons_size * m_layout.scale;
+    const float separator_size = m_layout.separator_size * m_layout.scale;
+    const float gap_size = m_layout.gap_size * m_layout.scale;
+    const float border = m_layout.border * m_layout.scale;
 
-    Size cnv_size = parent.get_canvas_size();
-    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+    float left = m_layout.left + border;
+    const float top  = m_layout.top - border;
 
-    float scaled_icons_size = m_layout.icons_size * factor;
-    float scaled_separator_size = m_layout.separator_size * factor;
-    float scaled_gap_size = m_layout.gap_size * factor;
-    float scaled_border = m_layout.border * factor;
-
-    float left = m_layout.left + scaled_border;
-    float top = m_layout.top - scaled_border;
-
-
-    for (size_t id=0; id<m_items.size(); ++id)
-    {
+    for (size_t id = 0; id < m_items.size(); ++id) {
         GLToolbarItem* item = m_items[id];
 
         if (!item->is_visible())
             continue;
 
-        if (item->is_separator())
-        {
-            float right = left + scaled_separator_size;
-            float bottom = top - scaled_icons_size;
+        if (item->is_separator()) {
+            float right = left + separator_size;
+            const float bottom = top - icons_size;
 
             // mouse inside the separator
-            if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+            if (left <= (float)scaled_mouse_pos.x() &&
+                (float)scaled_mouse_pos.x() <= right &&
+                bottom <= (float)scaled_mouse_pos.y() &&
+                (float)scaled_mouse_pos.y() <= top)
                 return id;
 
             left = right;
-            right += scaled_gap_size;
+            right += gap_size;
 
-            if (id < m_items.size() - 1)
-            {
+            if (id < m_items.size() - 1) {
                 // mouse inside the gap
-                if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+                if (left <= (float)scaled_mouse_pos.x() &&
+                    (float)scaled_mouse_pos.x() <= right &&
+                    bottom <= (float)scaled_mouse_pos.y() &&
+                    (float)scaled_mouse_pos.y() <= top)
                     return -2;
             }
 
             left = right;
         }
-        else
-        {
-            float right = left + scaled_icons_size;
-            float bottom = top - scaled_icons_size;
+        else {
+            float right = left + icons_size;
+            const float bottom = top - icons_size;
 
             //BBS: GUI refactor: GLToolbar
             if (item->is_action_with_text())
-                right += scaled_icons_size * item->get_extra_size_ratio();
+                right += icons_size * item->get_extra_size_ratio();
 
             // mouse inside the icon
-            if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+            if (left <= (float)scaled_mouse_pos.x() &&
+                (float)scaled_mouse_pos.x() <= right &&
+                bottom <= (float)scaled_mouse_pos.y() &&
+                (float)scaled_mouse_pos.y() <= top)
                 return id;
 
             left = right;
-            right += scaled_gap_size;
+            right += gap_size;
 
-            if (id < m_items.size() - 1)
-            {
+            if (id < m_items.size() - 1) {
                 // mouse inside the gap
-                if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+                if (left <= (float)scaled_mouse_pos.x() &&
+                    (float)scaled_mouse_pos.x() <= right &&
+                    bottom <= (float)scaled_mouse_pos.y() &&
+                    (float)scaled_mouse_pos.y() <= top)
                     return -2;
             }
 
@@ -1166,73 +1141,75 @@ int GLToolbar::contains_mouse_horizontal(const Vec2d& mouse_pos, const GLCanvas3
 
 int GLToolbar::contains_mouse_vertical(const Vec2d& mouse_pos, const GLCanvas3D& parent) const
 {
-    // NB: mouse_pos is already scaled appropriately
+    const Size cnv_size = parent.get_canvas_size();
+    const Vec2d scaled_mouse_pos((mouse_pos.x() - 0.5 * (double)cnv_size.get_width()), (0.5 * (double)cnv_size.get_height() - mouse_pos.y()));
 
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-    float factor = m_layout.scale * inv_zoom;
+    const float icons_size = m_layout.icons_size * m_layout.scale;
+    const float separator_size = m_layout.separator_size * m_layout.scale;
+    const float gap_size = m_layout.gap_size * m_layout.scale;
+    const float border = m_layout.border * m_layout.scale;
 
-    Size cnv_size = parent.get_canvas_size();
-    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+    const float left = m_layout.left + border;
+    float top = m_layout.top - border;
 
-    float scaled_icons_size = m_layout.icons_size * factor;
-    float scaled_separator_size = m_layout.separator_size * factor;
-    float scaled_gap_size = m_layout.gap_size * factor;
-    float scaled_border = m_layout.border * factor;
-
-    float left = m_layout.left + scaled_border;
-    float top = m_layout.top - scaled_border;
-
-    for (size_t id=0; id<m_items.size(); ++id)
-    {
+    for (size_t id = 0; id < m_items.size(); ++id) {
         GLToolbarItem* item = m_items[id];
 
         if (!item->is_visible())
             continue;
 
-        if (item->is_separator())
-        {
-            float right = left + scaled_icons_size;
-            float bottom = top - scaled_separator_size;
+        if (item->is_separator()) {
+            const float right = left + icons_size;
+            float bottom = top - separator_size;
 
             // mouse inside the separator
-            if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+            if (left <= (float)scaled_mouse_pos.x() &&
+                (float)scaled_mouse_pos.x() <= right &&
+                bottom <= (float)scaled_mouse_pos.y() &&
+                (float)scaled_mouse_pos.y() <= top)
                 return id;
 
             top = bottom;
-            bottom -= scaled_gap_size;
+            bottom -= gap_size;
 
-            if (id < m_items.size() - 1)
-            {
+            if (id < m_items.size() - 1) {
                 // mouse inside the gap
-                if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+                if (left <= (float)scaled_mouse_pos.x() &&
+                    (float)scaled_mouse_pos.x() <= right &&
+                    bottom <= (float)scaled_mouse_pos.y() &&
+                    (float)scaled_mouse_pos.y() <= top)
                     return -2;
             }
 
             top = bottom;
         }
-        else
-        {
-            float right = left + scaled_icons_size;
-            float bottom = top - scaled_icons_size;
+        else {
+            float right = left + icons_size;
+            float bottom = top - icons_size;
 
             if (item->is_action_with_text_image())
-                right += m_layout.text_size * factor;
+                right += m_layout.text_size * m_layout.scale;
 
             //BBS: GUI refactor: GLToolbar
             if (item->is_action_with_text())
-                right += scaled_icons_size * item->get_extra_size_ratio();
+                right += icons_size * item->get_extra_size_ratio();
 
             // mouse inside the icon
-            if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+            if (left <= (float)scaled_mouse_pos.x() &&
+                (float)scaled_mouse_pos.x() <= right &&
+                bottom <= (float)scaled_mouse_pos.y() &&
+                (float)scaled_mouse_pos.y() <= top)
                 return id;
 
             top = bottom;
-            bottom -= scaled_gap_size;
+            bottom -= gap_size;
 
-            if (id < m_items.size() - 1)
-            {
+            if (id < m_items.size() - 1) {
                 // mouse inside the gap
-                if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+                if (left <= (float)scaled_mouse_pos.x() &&
+                    (float)scaled_mouse_pos.x() <= right &&
+                    bottom <= (float)scaled_mouse_pos.y() &&
+                    (float)scaled_mouse_pos.y() <= top)
                     return -2;
             }
 
@@ -1243,33 +1220,32 @@ int GLToolbar::contains_mouse_vertical(const Vec2d& mouse_pos, const GLCanvas3D&
     return -1;
 }
 
-void GLToolbar::render_background(float left, float top, float right, float bottom, float border) const
+void GLToolbar::render_background(float left, float top, float right, float bottom, float border_w, float border_h) const
 {
-    unsigned int tex_id = m_background_texture.texture.get_id();
-    float tex_width = (float)m_background_texture.texture.get_width();
-    float tex_height = (float)m_background_texture.texture.get_height();
-    if ((tex_id != 0) && (tex_width > 0) && (tex_height > 0))
-    {
-        float inv_tex_width = (tex_width != 0.0f) ? 1.0f / tex_width : 0.0f;
-        float inv_tex_height = (tex_height != 0.0f) ? 1.0f / tex_height : 0.0f;
+    const unsigned int tex_id = m_background_texture.texture.get_id();
+    const float tex_width = (float)m_background_texture.texture.get_width();
+    const float tex_height = (float)m_background_texture.texture.get_height();
+    if (tex_id != 0 && tex_width > 0.0f && tex_height > 0.0f) {
+        const float inv_tex_width  = 1.0f / tex_width;
+        const float inv_tex_height = 1.0f / tex_height;
 
-        float internal_left = left + border;
-        float internal_right = right - border;
-        float internal_top = top - border;
-        float internal_bottom = bottom + border;
+        const float internal_left   = left + border_w;
+        const float internal_right  = right - border_w;
+        const float internal_top    = top - border_h;
+        const float internal_bottom = bottom + border_w;
 
-        float left_uv = 0.0f;
-        float right_uv = 1.0f;
-        float top_uv = 1.0f;
-        float bottom_uv = 0.0f;
+        const float left_uv   = 0.0f;
+        const float right_uv  = 1.0f;
+        const float top_uv    = 1.0f;
+        const float bottom_uv = 0.0f;
 
-        float internal_left_uv = (float)m_background_texture.metadata.left * inv_tex_width;
-        float internal_right_uv = 1.0f - (float)m_background_texture.metadata.right * inv_tex_width;
-        float internal_top_uv = 1.0f - (float)m_background_texture.metadata.top * inv_tex_height;
-        float internal_bottom_uv = (float)m_background_texture.metadata.bottom * inv_tex_height;
+        const float internal_left_uv = (float)m_background_texture.metadata.left * inv_tex_width;
+        const float internal_right_uv = 1.0f - (float)m_background_texture.metadata.right * inv_tex_width;
+        const float internal_top_uv = 1.0f - (float)m_background_texture.metadata.top * inv_tex_height;
+        const float internal_bottom_uv = (float)m_background_texture.metadata.bottom * inv_tex_height;
 
         // top-left corner
-        if ((m_layout.horizontal_orientation == Layout::HO_Left) || (m_layout.vertical_orientation == Layout::VO_Top))
+        if (m_layout.horizontal_orientation == Layout::HO_Left || m_layout.vertical_orientation == Layout::VO_Top)
             GLTexture::render_sub_texture(tex_id, left, internal_left, internal_top, top, { { internal_left_uv, internal_bottom_uv }, { internal_right_uv, internal_bottom_uv }, { internal_right_uv, internal_top_uv }, { internal_left_uv, internal_top_uv } });
         else
             GLTexture::render_sub_texture(tex_id, left, internal_left, internal_top, top, { { left_uv, internal_top_uv }, { internal_left_uv, internal_top_uv }, { internal_left_uv, top_uv }, { left_uv, top_uv } });
@@ -1281,7 +1257,7 @@ void GLToolbar::render_background(float left, float top, float right, float bott
             GLTexture::render_sub_texture(tex_id, internal_left, internal_right, internal_top, top, { { internal_left_uv, internal_top_uv }, { internal_right_uv, internal_top_uv }, { internal_right_uv, top_uv }, { internal_left_uv, top_uv } });
 
         // top-right corner
-        if ((m_layout.horizontal_orientation == Layout::HO_Right) || (m_layout.vertical_orientation == Layout::VO_Top))
+        if (m_layout.horizontal_orientation == Layout::HO_Right || m_layout.vertical_orientation == Layout::VO_Top)
             GLTexture::render_sub_texture(tex_id, internal_right, right, internal_top, top, { { internal_left_uv, internal_bottom_uv }, { internal_right_uv, internal_bottom_uv }, { internal_right_uv, internal_top_uv }, { internal_left_uv, internal_top_uv } });
         else
             GLTexture::render_sub_texture(tex_id, internal_right, right, internal_top, top, { { internal_right_uv, internal_top_uv }, { right_uv, internal_top_uv }, { right_uv, top_uv }, { internal_right_uv, top_uv } });
@@ -1302,7 +1278,7 @@ void GLToolbar::render_background(float left, float top, float right, float bott
             GLTexture::render_sub_texture(tex_id, internal_right, right, internal_bottom, internal_top, { { internal_right_uv, internal_bottom_uv }, { right_uv, internal_bottom_uv }, { right_uv, internal_top_uv }, { internal_right_uv, internal_top_uv } });
 
         // bottom-left corner
-        if ((m_layout.horizontal_orientation == Layout::HO_Left) || (m_layout.vertical_orientation == Layout::VO_Bottom))
+        if (m_layout.horizontal_orientation == Layout::HO_Left || m_layout.vertical_orientation == Layout::VO_Bottom)
             GLTexture::render_sub_texture(tex_id, left, internal_left, bottom, internal_bottom, { { internal_left_uv, internal_bottom_uv }, { internal_right_uv, internal_bottom_uv }, { internal_right_uv, internal_top_uv }, { internal_left_uv, internal_top_uv } });
         else
             GLTexture::render_sub_texture(tex_id, left, internal_left, bottom, internal_bottom, { { left_uv, bottom_uv }, { internal_left_uv, bottom_uv }, { internal_left_uv, internal_bottom_uv }, { left_uv, internal_bottom_uv } });
@@ -1314,7 +1290,7 @@ void GLToolbar::render_background(float left, float top, float right, float bott
             GLTexture::render_sub_texture(tex_id, internal_left, internal_right, bottom, internal_bottom, { { internal_left_uv, bottom_uv }, { internal_right_uv, bottom_uv }, { internal_right_uv, internal_bottom_uv }, { internal_left_uv, internal_bottom_uv } });
 
         // bottom-right corner
-        if ((m_layout.horizontal_orientation == Layout::HO_Right) || (m_layout.vertical_orientation == Layout::VO_Bottom))
+        if (m_layout.horizontal_orientation == Layout::HO_Right || m_layout.vertical_orientation == Layout::VO_Bottom)
             GLTexture::render_sub_texture(tex_id, internal_right, right, bottom, internal_bottom, { { internal_left_uv, internal_bottom_uv }, { internal_right_uv, internal_bottom_uv }, { internal_right_uv, internal_top_uv }, { internal_left_uv, internal_top_uv } });
         else
             GLTexture::render_sub_texture(tex_id, internal_right, right, bottom, internal_bottom, { { internal_right_uv, bottom_uv }, { right_uv, bottom_uv }, { right_uv, internal_bottom_uv }, { internal_right_uv, internal_bottom_uv } });
@@ -1389,41 +1365,48 @@ void GLToolbar::render_arrow(const GLCanvas3D& parent, GLToolbarItem* highlighte
 
 void GLToolbar::render_horizontal(const GLCanvas3D& parent,GLToolbarItem::EType type)
 {
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-    float factor = inv_zoom * m_layout.scale;
+    const Size cnv_size = parent.get_canvas_size();
+    const float cnv_w = (float)cnv_size.get_width();
+    const float cnv_h = (float)cnv_size.get_height();
 
-    float scaled_icons_size = m_layout.icons_size * factor;
-    float scaled_separator_size = m_layout.separator_size * factor;
-    float scaled_gap_size = m_layout.gap_size * factor;
-    float scaled_border = m_layout.border * factor;
-    float scaled_width = get_width() * inv_zoom;
-    float scaled_height = get_height() * inv_zoom;
+    if (cnv_w == 0 || cnv_h == 0)
+        return;
 
-    float separator_stride = scaled_separator_size + scaled_gap_size;
-    float icon_stride = scaled_icons_size + scaled_gap_size;
+    const float inv_cnv_w = 1.0f / cnv_w;
+    const float inv_cnv_h = 1.0f / cnv_h;
 
-    float left = m_layout.left;
-    float top = m_layout.top;
-    float right = left + scaled_width;
+    const float icons_size_x = 2.0f * m_layout.icons_size * m_layout.scale * inv_cnv_w;
+    const float icons_size_y = 2.0f * m_layout.icons_size * m_layout.scale * inv_cnv_h;
+    const float separator_size = 2.0f * m_layout.separator_size * m_layout.scale * inv_cnv_w;
+    const float gap_size = 2.0f * m_layout.gap_size * m_layout.scale * inv_cnv_w;
+    const float border_w = 2.0f * m_layout.border * m_layout.scale * inv_cnv_w;
+    const float border_h = 2.0f * m_layout.border * m_layout.scale * inv_cnv_h;
+    const float width = 2.0f * get_width() * inv_cnv_w;
+    const float height = 2.0f * get_height() * inv_cnv_h;
+
+    const float separator_stride = separator_size + gap_size;
+    const float icon_stride = icons_size_x + gap_size;
+
+    float left   = 2.0f * m_layout.left * inv_cnv_w;
+    float top    = 2.0f * m_layout.top * inv_cnv_h;
+    float right = left + width;
     if (type == GLToolbarItem::SeparatorLine)
-        right = left + scaled_width * 0.5;
-    float bottom = top - scaled_height;
+        right = left + width * 0.5;
+    const float bottom = top - height;
 
-    render_background(left, top, right, bottom, scaled_border);
+    render_background(left, top, right, bottom, border_w, border_h);
 
-    left += scaled_border;
-    top -= scaled_border;
+    left += border_w;
+    top  -= border_h;
 
     // renders icons
-    for (const GLToolbarItem* item : m_items)
-    {
+    for (const GLToolbarItem* item : m_items) {
         if (!item->is_visible())
             continue;
 
         if (item->is_separator())
             left += separator_stride;
-        else
-        {
+        else {
             //BBS GUI refactor
             item->render_left_pos = left;
             if (!item->is_action_with_text_image()) {
@@ -1432,13 +1415,13 @@ void GLToolbar::render_horizontal(const GLCanvas3D& parent,GLToolbarItem::EType
                 int tex_height = m_icons_texture.get_height();
                 if ((tex_id == 0) || (tex_width <= 0) || (tex_height <= 0))
                     return;
-                item->render(tex_id, left, left + scaled_icons_size, top - scaled_icons_size, top, (unsigned int)tex_width, (unsigned int)tex_height, (unsigned int)(m_layout.icons_size * m_layout.scale));
+                item->render(tex_id, left, left + icons_size_x, top - icons_size_y, top, (unsigned int)tex_width, (unsigned int)tex_height, (unsigned int)(m_layout.icons_size * m_layout.scale));
             }
             //BBS: GUI refactor: GLToolbar
             if (item->is_action_with_text())
             {
-                float scaled_text_size = item->get_extra_size_ratio() * scaled_icons_size;
-                item->render_text(left + scaled_icons_size, left + scaled_icons_size + scaled_text_size, top - scaled_icons_size, top);
+                float scaled_text_size = item->get_extra_size_ratio() * icons_size_x;
+                item->render_text(left + icons_size_x, left + icons_size_x + scaled_text_size, top - icons_size_y, top);
                 left += scaled_text_size;
             }
             left += icon_stride;
@@ -1448,28 +1431,37 @@ void GLToolbar::render_horizontal(const GLCanvas3D& parent,GLToolbarItem::EType
 
 void GLToolbar::render_vertical(const GLCanvas3D& parent)
 {
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
-    float factor = inv_zoom * m_layout.scale;
+    const Size cnv_size = parent.get_canvas_size();
+    const float cnv_w = (float)cnv_size.get_width();
+    const float cnv_h = (float)cnv_size.get_height();
 
-    float scaled_icons_size = m_layout.icons_size * factor;
-    float scaled_separator_size = m_layout.separator_size * factor;
-    float scaled_gap_size = m_layout.gap_size * factor;
-    float scaled_border = m_layout.border * factor;
-    float scaled_width = get_width() * inv_zoom;
-    float scaled_height = get_height() * inv_zoom;
+    if (cnv_w == 0 || cnv_h == 0)
+        return;
 
-    float separator_stride = scaled_separator_size + scaled_gap_size;
-    float icon_stride = scaled_icons_size + scaled_gap_size;
+    const float inv_cnv_w = 1.0f / cnv_w;
+    const float inv_cnv_h = 1.0f / cnv_h;
 
-    float left = m_layout.left;
-    float top = m_layout.top;
-    float right = left + scaled_width;
-    float bottom = top - scaled_height;
+    const float icons_size_x = 2.0f * m_layout.icons_size * m_layout.scale * inv_cnv_w;
+    const float icons_size_y = 2.0f * m_layout.icons_size * m_layout.scale * inv_cnv_h;
+    const float separator_size = 2.0f * m_layout.separator_size * m_layout.scale * inv_cnv_h;
+    const float gap_size = 2.0f * m_layout.gap_size * m_layout.scale * inv_cnv_h;
+    const float border_w = 2.0f * m_layout.border * m_layout.scale * inv_cnv_w;
+    const float border_h = 2.0f * m_layout.border * m_layout.scale * inv_cnv_h;
+    const float width = 2.0f * get_width() * inv_cnv_w;
+    const float height = 2.0f * get_height() * inv_cnv_h;
 
-    render_background(left, top, right, bottom, scaled_border);
+    const float separator_stride = separator_size + gap_size;
+    const float icon_stride = icons_size_y + gap_size;
 
-    left += scaled_border;
-    top -= scaled_border;
+    float left         = 2.0f * m_layout.left * inv_cnv_w;
+    float top          = 2.0f * m_layout.top * inv_cnv_h;
+    const float right  = left + width;
+    const float bottom = top - height;
+
+    render_background(left, top, right, bottom, border_w, border_h);
+
+    left += border_w;
+    top  -= border_h;
 
     // renders icons
     for (const GLToolbarItem* item : m_items) {
@@ -1482,10 +1474,10 @@ void GLToolbar::render_vertical(const GLCanvas3D& parent)
             unsigned int tex_id;
             int tex_width, tex_height;
             if (item->is_action_with_text_image()) {
-                float scaled_text_size = m_layout.text_size * factor;
-                float scaled_text_width = item->get_extra_size_ratio() * scaled_icons_size;
-                float scaled_text_border = 2.5 * factor;
-                float scaled_text_height = scaled_icons_size / 2.0f;
+                float scaled_text_size = m_layout.text_size * m_layout.scale * inv_cnv_w;
+                float scaled_text_width = item->get_extra_size_ratio() * icons_size_x;
+                float scaled_text_border = 2.5 * m_layout.scale * inv_cnv_h;
+                float scaled_text_height = icons_size_y / 2.0f;
                 item->render_text(left, left + scaled_text_size, top - scaled_text_border - scaled_text_height, top - scaled_text_border);
 
                 float image_left = left + scaled_text_size;
@@ -1494,7 +1486,7 @@ void GLToolbar::render_vertical(const GLCanvas3D& parent)
                 tex_height = item->m_data.image_texture.get_height();
                 if ((tex_id == 0) || (tex_width <= 0) || (tex_height <= 0))
                     return;
-                item->render_image(tex_id, image_left, image_left + scaled_icons_size, top - scaled_icons_size, top, (unsigned int)tex_width, (unsigned int)tex_height, (unsigned int)(m_layout.icons_size * m_layout.scale));
+                item->render_image(tex_id, image_left, image_left + icons_size_x, top - icons_size_y, top, (unsigned int)tex_width, (unsigned int)tex_height, (unsigned int)(m_layout.icons_size * m_layout.scale));
             }
             else {
                 tex_id = m_icons_texture.get_id();
@@ -1502,14 +1494,14 @@ void GLToolbar::render_vertical(const GLCanvas3D& parent)
                 tex_height = m_icons_texture.get_height();
                 if ((tex_id == 0) || (tex_width <= 0) || (tex_height <= 0))
                     return;
-                item->render(tex_id, left, left + scaled_icons_size, top - scaled_icons_size, top, (unsigned int)tex_width, (unsigned int)tex_height, (unsigned int)(m_layout.icons_size * m_layout.scale));
+                item->render(tex_id, left, left + icons_size_x, top - icons_size_y, top, (unsigned int)tex_width, (unsigned int)tex_height, (unsigned int)(m_layout.icons_size * m_layout.scale));
                 //BBS: GUI refactor: GLToolbar
             }
             if (item->is_action_with_text())
             {
-                float scaled_text_width = item->get_extra_size_ratio() * scaled_icons_size;
-                float scaled_text_height = scaled_icons_size;
-                item->render_text(left + scaled_icons_size, left + scaled_icons_size + scaled_text_width, top - scaled_text_height, top);
+                float scaled_text_width = item->get_extra_size_ratio() * icons_size_x;
+                float scaled_text_height = icons_size_y;
+                item->render_text(left + icons_size_x, left + icons_size_x + scaled_text_width, top - scaled_text_height, top);
             }
             top -= icon_stride;
         }

src/slic3r/GUI/GLToolbar.hpp

@@ -436,7 +436,7 @@ private:
     int contains_mouse_horizontal(const Vec2d& mouse_pos, const GLCanvas3D& parent) const;
     int contains_mouse_vertical(const Vec2d& mouse_pos, const GLCanvas3D& parent) const;
 
-    void render_background(float left, float top, float right, float bottom, float border) const;
+    void render_background(float left, float top, float right, float bottom, float border_w, float border_h) const;
     void render_horizontal(const GLCanvas3D &parent, GLToolbarItem::EType type);
     void render_vertical(const GLCanvas3D& parent);
 

src/slic3r/GUI/Gizmos/GLGizmoAdvancedCut.cpp

@@ -492,8 +492,6 @@ void GLGizmoAdvancedCut::on_render_for_picking()
 
     glsafe(::glDisable(GL_DEPTH_TEST));
 
-    glsafe(::glPushMatrix());
-
     BoundingBoxf3 box = m_parent.get_selection().get_bounding_box();
 #if ENABLE_FIXED_GRABBER
     float mean_size = (float)(GLGizmoBase::Grabber::FixedGrabberSize);
@@ -502,17 +500,17 @@ void GLGizmoAdvancedCut::on_render_for_picking()
 #endif
 
     m_move_grabber.color    = picking_color_component(0);
-    GLShaderProgram *shader = wxGetApp().get_shader("flat");
+    GLShaderProgram *shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
-
+        const Camera &camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
         m_move_grabber.render_for_picking(mean_size);
 
         shader->stop_using();
     }
 
-    glsafe(::glPopMatrix());
-
     glsafe(::glEnable(GL_DEPTH_TEST));
     auto inst_id = m_c->selection_info()->get_active_instance();
     if (inst_id < 0)
@@ -868,7 +866,7 @@ void GLGizmoAdvancedCut::render_cut_plane_and_grabbers()
     glsafe(::glEnable(GL_BLEND));
     glsafe(::glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA));
     
-    GLShaderProgram *shader = wxGetApp().get_shader("flat");
+    GLShaderProgram *shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
 
@@ -877,7 +875,7 @@ void GLGizmoAdvancedCut::render_cut_plane_and_grabbers()
             m_plane.reset();
 
             GLModel::Geometry init_data;
-            init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+            init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3 };
             init_data.color  = { 0.8f, 0.8f, 0.8f, 0.5f };
             init_data.reserve_vertices(4);
             init_data.reserve_vertices(6);
@@ -888,11 +886,14 @@ void GLGizmoAdvancedCut::render_cut_plane_and_grabbers()
             }
 
             // indices
-            init_data.add_ushort_triangle(0, 1, 2);
-            init_data.add_ushort_triangle(2, 3, 0);
+            init_data.add_triangle(0, 1, 2);
+            init_data.add_triangle(2, 3, 0);
 
             m_plane.init_from(std::move(init_data));
         }
+        const Camera &camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
         m_plane.render();
 
         glsafe(::glEnable(GL_CULL_FACE));
@@ -907,17 +908,17 @@ void GLGizmoAdvancedCut::render_cut_plane_and_grabbers()
             m_grabber_connection.reset();
 
             GLModel::Geometry init_data;
-            init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+            init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
             init_data.color  = ColorRGBA::YELLOW();
-            init_data.vertices.reserve(2 * GLModel::Geometry::vertex_stride_floats(init_data.format));
-            init_data.indices.reserve(2 * GLModel::Geometry::index_stride_bytes(init_data.format));
+            init_data.reserve_vertices(2);
+            init_data.reserve_vertices(2);
 
             // vertices
             init_data.add_vertex((Vec3f)plane_center_rot.cast<float>());
             init_data.add_vertex((Vec3f)m_move_grabber.center.cast<float>());
 
             // indices
-            init_data.add_ushort_line(0, 1);
+            init_data.add_line(0, 1);
 
             m_grabber_connection.init_from(std::move(init_data));
         }
@@ -933,7 +934,7 @@ void GLGizmoAdvancedCut::render_cut_plane_and_grabbers()
     }
 
     {
-        GLShaderProgram *shader = wxGetApp().get_shader("gouraud_light");
+        GLShaderProgram *shader = wxGetApp().get_shader("gouraud_light_attr");
         if (shader == nullptr)
             return;
         shader->start_using();
@@ -960,13 +961,15 @@ void GLGizmoAdvancedCut::render_cut_plane_and_grabbers()
 
         cube.set_color(render_color);
 
-        glsafe(::glPushMatrix());
-        glsafe(::glTranslated(m_move_grabber.center.x(), m_move_grabber.center.y(), m_move_grabber.center.z()));
-        glsafe(::glMultMatrixd(m_rotate_matrix.data()));
-
-        glsafe(::glScaled(fullsize, fullsize, fullsize));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d view_model_matrix = camera.get_view_matrix() * Geometry::assemble_transform(m_move_grabber.center) *
+                                              m_rotate_matrix *
+                                              Geometry::assemble_transform(Vec3d::Zero(), Vec3d::Zero(), fullsize * Vec3d::Ones());
+        const Transform3d& projection_matrix = camera.get_projection_matrix();
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("projection_matrix", projection_matrix);
+        shader->set_uniform("normal_matrix", (Matrix3d) view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         cube.render();
-        glsafe(::glPopMatrix());
         shader->stop_using();
     }
 
@@ -1064,23 +1067,26 @@ void GLGizmoAdvancedCut::render_cut_line()
 
 void GLGizmoAdvancedCut::render_connector_model(GLModel &model, const ColorRGBA &color, Transform3d view_model_matrix, bool for_picking)
 {
-    glPushMatrix();
     GLShaderProgram *shader = nullptr;
     if (for_picking)
-        shader = wxGetApp().get_shader("cali");
+        shader = wxGetApp().get_shader("flat_attr");
     else
-        shader = wxGetApp().get_shader("gouraud_light");
+        shader = wxGetApp().get_shader("gouraud_light_attr");
     if (shader) {
         shader->start_using();
 
-        glsafe(::glMultMatrixd(view_model_matrix.data()));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        view_model_matrix = camera.get_view_matrix() * view_model_matrix;
+        const Transform3d &projection_matrix = camera.get_projection_matrix();
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("projection_matrix", projection_matrix);
+        shader->set_uniform("normal_matrix", (Matrix3d) view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
 
         model.set_color(color);
         model.render();
 
         shader->stop_using();
     }
-    glPopMatrix();
 }
 
 void GLGizmoAdvancedCut::clear_selection()

src/slic3r/GUI/Gizmos/GLGizmoBase.cpp

@@ -4,6 +4,7 @@
 #include <GL/glew.h>
 
 #include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/Plater.hpp"
 #include "slic3r/GUI/GUI_Colors.hpp"
 
 // TODO: Display tooltips quicker on Linux
@@ -97,11 +98,15 @@ GLModel& GLGizmoBase::Grabber::get_cube()
 
 void GLGizmoBase::Grabber::render(float size, const ColorRGBA& render_color, bool picking)
 {
+    GLShaderProgram* shader = wxGetApp().get_current_shader();
+    if (shader == nullptr)
+        return;
+
     if (!m_cube.is_initialized()) {
         // This cannot be done in constructor, OpenGL is not yet
         // initialized at that point (on Linux at least).
         indexed_triangle_set its = its_make_cube(1., 1., 1.);
-        its_translate(its, Vec3f(-0.5, -0.5, -0.5));
+        its_translate(its, -0.5f * Vec3f::Ones());
         m_cube.init_from(its);
     }
 
@@ -115,14 +120,14 @@ void GLGizmoBase::Grabber::render(float size, const ColorRGBA& render_color, boo
 
     m_cube.set_color(render_color);
 
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(center.x(), center.y(), center.z()));
-    glsafe(::glRotated(Geometry::rad2deg(angles.z()), 0.0, 0.0, 1.0));
-    glsafe(::glRotated(Geometry::rad2deg(angles.y()), 0.0, 1.0, 0.0));
-    glsafe(::glRotated(Geometry::rad2deg(angles.x()), 1.0, 0.0, 0.0));
-    glsafe(::glScaled(fullsize, fullsize, fullsize));
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d view_model_matrix = camera.get_view_matrix() * matrix * Geometry::assemble_transform(center, angles, fullsize * Vec3d::Ones());
+    const Transform3d& projection_matrix = camera.get_projection_matrix();
+ 
+    shader->set_uniform("view_model_matrix", view_model_matrix);
+    shader->set_uniform("projection_matrix", projection_matrix);
+    shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
     m_cube.render();
-    glsafe(::glPopMatrix());
 }
 
 GLGizmoBase::GLGizmoBase(GLCanvas3D& parent, const std::string& icon_filename, unsigned int sprite_id)
@@ -257,7 +262,7 @@ void GLGizmoBase::render_grabbers(const BoundingBoxf3& box) const
 
 void GLGizmoBase::render_grabbers(float size) const
 {
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
+    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
     if (shader == nullptr)
         return;
     shader->start_using();
@@ -271,7 +276,7 @@ void GLGizmoBase::render_grabbers(float size) const
 
 void GLGizmoBase::render_grabbers_for_picking(const BoundingBoxf3& box) const
 {
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
 

src/slic3r/GUI/Gizmos/GLGizmoBase.hpp

@@ -68,6 +68,7 @@ protected:
         bool dragging{ false };
         Vec3d center{ Vec3d::Zero() };
         Vec3d angles{ Vec3d::Zero() };
+        Transform3d matrix{ Transform3d::Identity() };
         ColorRGBA color{GRABBER_NORMAL_COL};
         ColorRGBA hover_color{GRABBER_HOVER_COL};
 

src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.cpp

@@ -155,7 +155,7 @@ bool GLGizmoFdmSupports::on_key_down_select_tool_type(int keyCode) {
 void GLGizmoFdmSupports::render_triangles(const Selection& selection) const
 {
     ClippingPlaneDataWrapper clp_data = this->get_clipping_plane_data();
-    auto* shader = wxGetApp().get_shader("mm_gouraud");
+    auto* shader = wxGetApp().get_shader("mm_gouraud_attr");
     if (!shader)
         return;
     shader->start_using();
@@ -177,8 +177,11 @@ void GLGizmoFdmSupports::render_triangles(const Selection& selection) const
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CW));
 
-        glsafe(::glPushMatrix());
-        glsafe(::glMultMatrixd(trafo_matrix.data()));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d matrix = camera.get_view_matrix() * trafo_matrix;
+        shader->set_uniform("view_model_matrix", matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
 
         float normal_z = -::cos(Geometry::deg2rad(m_highlight_by_angle_threshold_deg));
         Matrix3f normal_matrix = static_cast<Matrix3f>(trafo_matrix.matrix().block(0, 0, 3, 3).inverse().transpose().cast<float>());
@@ -188,9 +191,8 @@ void GLGizmoFdmSupports::render_triangles(const Selection& selection) const
         shader->set_uniform("slope.actived", m_parent.is_using_slope());
         shader->set_uniform("slope.volume_world_normal_matrix", normal_matrix);
         shader->set_uniform("slope.normal_z", normal_z);
-        m_triangle_selectors[mesh_id]->render(m_imgui);
+        m_triangle_selectors[mesh_id]->render(m_imgui, trafo_matrix);
 
-        glsafe(::glPopMatrix());
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CCW));
     }
@@ -895,7 +897,7 @@ void GLGizmoFdmSupports::run_thread()
             goto _finished;
         }
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::UINT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
         for (const SupportLayer *support_layer : m_print_instance.print_object->support_layers())
         {
             for (const ExtrusionEntity *extrusion_entity : support_layer->support_fills.entities)

src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp

@@ -2,6 +2,7 @@
 #include "GLGizmoFlatten.hpp"
 #include "slic3r/GUI/GLCanvas3D.hpp"
 #include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/Plater.hpp"
 #include "slic3r/GUI/Gizmos/GLGizmosCommon.hpp"
 
 #include "libslic3r/Geometry/ConvexHull.hpp"
@@ -63,7 +64,7 @@ void GLGizmoFlatten::on_render()
 {
     const Selection& selection = m_parent.get_selection();
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader == nullptr)
         return;
     
@@ -75,16 +76,18 @@ void GLGizmoFlatten::on_render()
 
     if (selection.is_single_full_instance()) {
         const Transform3d& m = selection.get_volume(*selection.get_volume_idxs().begin())->get_instance_transformation().get_matrix();
-        glsafe(::glPushMatrix());
-        glsafe(::glTranslatef(0.f, 0.f, selection.get_volume(*selection.get_volume_idxs().begin())->get_sla_shift_z()));
-        glsafe(::glMultMatrixd(m.data()));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d view_model_matrix = camera.get_view_matrix() *
+            Geometry::assemble_transform(selection.get_volume(*selection.get_volume_idxs().begin())->get_sla_shift_z() * Vec3d::UnitZ()) * m;
+
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
         if (this->is_plane_update_necessary())
             update_planes();
         for (int i = 0; i < (int)m_planes.size(); ++i) {
 		    m_planes[i].vbo.set_color(i == m_hover_id ? GLGizmoBase::FLATTEN_HOVER_COLOR : GLGizmoBase::FLATTEN_COLOR);
             m_planes[i].vbo.render();
         }
-        glsafe(::glPopMatrix());
     }
 
     glsafe(::glEnable(GL_CULL_FACE));
@@ -95,7 +98,7 @@ void GLGizmoFlatten::on_render()
 void GLGizmoFlatten::on_render_for_picking()
 {
     const Selection& selection = m_parent.get_selection();
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader == nullptr)
         return;
 
@@ -106,16 +109,18 @@ void GLGizmoFlatten::on_render_for_picking()
 
     if (selection.is_single_full_instance() && !wxGetKeyState(WXK_CONTROL)) {
         const Transform3d& m = selection.get_volume(*selection.get_volume_idxs().begin())->get_instance_transformation().get_matrix();
-        glsafe(::glPushMatrix());
-        glsafe(::glTranslatef(0.f, 0.f, selection.get_volume(*selection.get_volume_idxs().begin())->get_sla_shift_z()));
-        glsafe(::glMultMatrixd(m.data()));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d view_model_matrix = camera.get_view_matrix() *
+            Geometry::assemble_transform(selection.get_volume(*selection.get_volume_idxs().begin())->get_sla_shift_z() * Vec3d::UnitZ()) * m;
+
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
         if (this->is_plane_update_necessary())
             update_planes();
         for (int i = 0; i < (int)m_planes.size(); ++i) {
             m_planes[i].vbo.set_color(picking_color_component(i));
             m_planes[i].vbo.render();
         }
-        glsafe(::glPopMatrix());
     }
 
     glsafe(::glEnable(GL_CULL_FACE));
@@ -337,16 +342,13 @@ void GLGizmoFlatten::update_planes()
     // the vertices in order, so triangulation is trivial.
     for (auto& plane : m_planes) {
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::TriangleFan, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::index_type(plane.vertices.size()) };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::TriangleFan, GLModel::Geometry::EVertexLayout::P3N3 };
         init_data.reserve_vertices(plane.vertices.size());
         init_data.reserve_indices(plane.vertices.size());
         // vertices + indices
         for (size_t i = 0; i < plane.vertices.size(); ++i) {
             init_data.add_vertex((Vec3f)plane.vertices[i].cast<float>(), (Vec3f)plane.normal.cast<float>());
-            if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-                init_data.add_ushort_index((unsigned short)i);
-            else
-                init_data.add_uint_index((unsigned int)i);
+            init_data.add_index((unsigned int)i);
         }
         plane.vbo.init_from(std::move(init_data));
         // FIXME: vertices should really be local, they need not

src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp

@@ -103,7 +103,7 @@ void GLGizmoHollow::on_render_for_picking()
 
 void GLGizmoHollow::render_points(const Selection& selection, bool picking)
 {
-    GLShaderProgram* shader = picking ? wxGetApp().get_shader("flat") : wxGetApp().get_shader("gouraud_light");
+    GLShaderProgram* shader = picking ? wxGetApp().get_shader("flat_attr") : wxGetApp().get_shader("gouraud_light_attr");
     if (shader == nullptr)
         return;
 
@@ -111,20 +111,22 @@ void GLGizmoHollow::render_points(const Selection& selection, bool picking)
     ScopeGuard guard([shader]() { shader->stop_using(); });
 
     const GLVolume* vol = selection.get_volume(*selection.get_volume_idxs().begin());
-    const Transform3d& instance_scaling_matrix_inverse = vol->get_instance_transformation().get_matrix(true, true, false, true).inverse();
-    const Transform3d& instance_matrix = vol->get_instance_transformation().get_matrix();
+    const Transform3d instance_scaling_matrix_inverse = vol->get_instance_transformation().get_matrix(true, true, false, true).inverse();
+    const Transform3d instance_matrix = Geometry::assemble_transform(m_c->selection_info()->get_sla_shift() * Vec3d::UnitZ()) * vol->get_instance_transformation().get_matrix();
 
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(0.0, 0.0, m_c->selection_info()->get_sla_shift()));
-    glsafe(::glMultMatrixd(instance_matrix.data()));
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d& view_matrix = camera.get_view_matrix();
+    const Transform3d& projection_matrix = camera.get_projection_matrix();
+
+    shader->set_uniform("projection_matrix", projection_matrix);
 
     ColorRGBA render_color;
     const sla::DrainHoles& drain_holes = m_c->selection_info()->model_object()->sla_drain_holes;
-    size_t cache_size = drain_holes.size();
+    const size_t cache_size = drain_holes.size();
 
     for (size_t i = 0; i < cache_size; ++i) {
         const sla::DrainHole& drain_hole = drain_holes[i];
-        const bool& point_selected = m_selected[i];
+        const bool point_selected = m_selected[i];
 
         if (is_mesh_point_clipped(drain_hole.pos.cast<double>()))
             continue;
@@ -147,9 +149,7 @@ void GLGizmoHollow::render_points(const Selection& selection, bool picking)
         m_cylinder.set_color(render_color);
 
         // Inverse matrix of the instance scaling is applied so that the mark does not scale with the object.
-        glsafe(::glPushMatrix());
-        glsafe(::glTranslatef(drain_hole.pos.x(), drain_hole.pos.y(), drain_hole.pos.z()));
-        glsafe(::glMultMatrixd(instance_scaling_matrix_inverse.data()));
+        const Transform3d hole_matrix = Geometry::assemble_transform(drain_hole.pos.cast<double>()) * instance_scaling_matrix_inverse;
 
         if (vol->is_left_handed())
             glFrontFace(GL_CW);
@@ -157,18 +157,17 @@ void GLGizmoHollow::render_points(const Selection& selection, bool picking)
         // Matrices set, we can render the point mark now.
         Eigen::Quaterniond q;
         q.setFromTwoVectors(Vec3d::UnitZ(), instance_scaling_matrix_inverse * (-drain_hole.normal).cast<double>());
-        Eigen::AngleAxisd aa(q);
-        glsafe(::glRotated(aa.angle() * (180. / M_PI), aa.axis().x(), aa.axis().y(), aa.axis().z()));
-        glsafe(::glTranslated(0., 0., -drain_hole.height));
-        glsafe(::glScaled(drain_hole.radius, drain_hole.radius, drain_hole.height + sla::HoleStickOutLength));
+        const Eigen::AngleAxisd aa(q);
+        const Transform3d view_model_matrix = view_matrix * instance_matrix * hole_matrix * Transform3d(aa.toRotationMatrix()) *
+            Geometry::assemble_transform(-drain_hole.height * Vec3d::UnitZ(), Vec3d::Zero(), Vec3d(drain_hole.radius, drain_hole.radius, drain_hole.height + sla::HoleStickOutLength));
+
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_cylinder.render();
 
         if (vol->is_left_handed())
             glFrontFace(GL_CCW);
-        glsafe(::glPopMatrix());
     }
-
-    glsafe(::glPopMatrix());
 }
 
 bool GLGizmoHollow::is_mesh_point_clipped(const Vec3d& point) const

src/slic3r/GUI/Gizmos/GLGizmoMmuSegmentation.cpp

@@ -192,7 +192,7 @@ void GLGizmoMmuSegmentation::set_painter_gizmo_data(const Selection &selection)
 void GLGizmoMmuSegmentation::render_triangles(const Selection &selection) const
 {
     ClippingPlaneDataWrapper clp_data = this->get_clipping_plane_data();
-    auto                    *shader   = wxGetApp().get_shader("mm_gouraud");
+    auto* shader = wxGetApp().get_shader("mm_gouraud_attr");
     if (!shader)
         return;
     shader->start_using();
@@ -221,18 +221,20 @@ void GLGizmoMmuSegmentation::render_triangles(const Selection &selection) const
             trafo_matrix = mo->instances[selection.get_instance_idx()]->get_transformation().get_matrix()* mv->get_matrix();
         }
 
-        bool is_left_handed = trafo_matrix.matrix().determinant() < 0.;
+        const bool is_left_handed = trafo_matrix.matrix().determinant() < 0.0;
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CW));
 
-        glsafe(::glPushMatrix());
-        glsafe(::glMultMatrixd(trafo_matrix.data()));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d matrix = camera.get_view_matrix() * trafo_matrix;
+        shader->set_uniform("view_model_matrix", matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
 
         shader->set_uniform("volume_world_matrix", trafo_matrix);
         shader->set_uniform("volume_mirrored", is_left_handed);
-        m_triangle_selectors[mesh_id]->render(m_imgui);
+        m_triangle_selectors[mesh_id]->render(m_imgui, trafo_matrix);
 
-        glsafe(::glPopMatrix());
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CCW));
     }

src/slic3r/GUI/Gizmos/GLGizmoMove.cpp

@@ -140,7 +140,7 @@ void GLGizmoMove3D::on_render()
                 m_grabber_connections[id].model.reset();
 
                 GLModel::Geometry init_data;
-                init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+                init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
                 init_data.color = AXES_COLOR[id];
                 init_data.reserve_vertices(2);
                 init_data.reserve_indices(2);
@@ -150,7 +150,7 @@ void GLGizmoMove3D::on_render()
                 init_data.add_vertex((Vec3f)m_grabbers[id].center.cast<float>());
 
                 // indices
-                init_data.add_ushort_line(0, 1);
+                init_data.add_line(0, 1);
 
                 m_grabber_connections[id].model.init_from(std::move(init_data));
             //}
@@ -162,11 +162,13 @@ void GLGizmoMove3D::on_render()
         }
     };
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
 
-        // draw axes line
         // draw axes
         for (unsigned int i = 0; i < 3; ++i) {
             render_grabber_connection(i);
@@ -240,12 +242,12 @@ double GLGizmoMove3D::calc_projection(const UpdateData& data) const
 void GLGizmoMove3D::render_grabber_extension(Axis axis, const BoundingBoxf3& box, bool picking)
 {
 #if ENABLE_FIXED_GRABBER
-    float mean_size = (float)(GLGizmoBase::Grabber::FixedGrabberSize);
+    const float mean_size = (float)(GLGizmoBase::Grabber::FixedGrabberSize);
 #else
-    float mean_size = (float)((box.size().x() + box.size().y() + box.size().z()) / 3.0);
+    const float mean_size = (float)((box.size().x() + box.size().y() + box.size().z()) / 3.0);
 #endif
 
-    double size = 0.75 * GLGizmoBase::Grabber::FixedGrabberSize * GLGizmoBase::INV_ZOOM;
+    const double size = 0.75 * GLGizmoBase::Grabber::FixedGrabberSize * GLGizmoBase::INV_ZOOM;
 
     ColorRGBA color = m_grabbers[axis].color;
     if (!picking && m_hover_id != -1) {
@@ -254,7 +256,7 @@ void GLGizmoMove3D::render_grabber_extension(Axis axis, const BoundingBoxf3& box
         }
     }
 
-    GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat" : "gouraud_light");
+    GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat_attr" : "gouraud_light_attr");
     if (shader == nullptr)
         return;
 
@@ -262,22 +264,21 @@ void GLGizmoMove3D::render_grabber_extension(Axis axis, const BoundingBoxf3& box
     shader->start_using();
     shader->set_uniform("emission_factor", 0.1f);
 
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(m_grabbers[axis].center.x(), m_grabbers[axis].center.y(), m_grabbers[axis].center.z()));
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    Transform3d view_model_matrix = camera.get_view_matrix() * Geometry::assemble_transform(m_grabbers[axis].center);
     if (axis == X)
-        glsafe(::glRotated(90.0, 0.0, 1.0, 0.0));
+        view_model_matrix = view_model_matrix * Geometry::assemble_transform(Vec3d::Zero(), 0.5 * PI * Vec3d::UnitY());
     else if (axis == Y)
-        glsafe(::glRotated(-90.0, 1.0, 0.0, 0.0));
+        view_model_matrix = view_model_matrix * Geometry::assemble_transform(Vec3d::Zero(), -0.5 * PI * Vec3d::UnitX());
+    view_model_matrix = view_model_matrix * Geometry::assemble_transform(Vec3d::Zero(), Vec3d::Zero(), Vec3d(0.75 * size, 0.75 * size, 2.0 * size));
 
-    //glsafe(::glTranslated(0.0, 0.0, 2.0 * size));
-    glsafe(::glScaled(0.75 * size, 0.75 * size, 2.0 * size));
+    shader->set_uniform("view_model_matrix", view_model_matrix);
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+    shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
     m_cone.render();
-    glsafe(::glPopMatrix());
 
     shader->stop_using();
 }
 
-
-
 } // namespace GUI
 } // namespace Slic3r

src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp

@@ -75,7 +75,7 @@ GLGizmoPainterBase::ClippingPlaneDataWrapper GLGizmoPainterBase::get_clipping_pl
 
 void GLGizmoPainterBase::render_triangles(const Selection& selection) const
 {
-    auto* shader = wxGetApp().get_shader("gouraud");
+    auto* shader = wxGetApp().get_shader("gouraud_attr");
     if (! shader)
         return;
     shader->start_using();
@@ -105,8 +105,11 @@ void GLGizmoPainterBase::render_triangles(const Selection& selection) const
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CW));
 
-        glsafe(::glPushMatrix());
-        glsafe(::glMultMatrixd(trafo_matrix.data()));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d matrix = camera.get_view_matrix() * trafo_matrix;
+        shader->set_uniform("view_model_matrix", matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
 
         // For printers with multiple extruders, it is necessary to pass trafo_matrix
         // to the shader input variable print_box.volume_world_matrix before
@@ -114,9 +117,8 @@ void GLGizmoPainterBase::render_triangles(const Selection& selection) const
         // wrong transformation matrix is used for "Clipping of view".
         shader->set_uniform("volume_world_matrix", trafo_matrix);
 
-        m_triangle_selectors[mesh_id]->render(m_imgui);
+        m_triangle_selectors[mesh_id]->render(m_imgui, trafo_matrix);
 
-        glsafe(::glPopMatrix());
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CCW));
     }
@@ -165,43 +167,34 @@ void GLGizmoPainterBase::render_cursor()
 
 void GLGizmoPainterBase::render_cursor_circle()
 {
-    const Camera &camera   = wxGetApp().plater()->get_camera();
-    const float   zoom     = float(camera.get_zoom());
-    const float   inv_zoom = (zoom != 0.0f) ? 1.0f / zoom : 0.0f;
-
     const Size  cnv_size        = m_parent.get_canvas_size();
-    const float cnv_half_width  = 0.5f * float(cnv_size.get_width());
-    const float cnv_half_height = 0.5f * float(cnv_size.get_height());
-    if (cnv_half_width == 0.0f || cnv_half_height == 0.0f)
+    const float cnv_width  = float(cnv_size.get_width());
+    const float cnv_height = float(cnv_size.get_height());
+    if (cnv_width == 0.0f || cnv_height == 0.0f)
         return;
-    const Vec2d mouse_pos(m_parent.get_local_mouse_position().x(), m_parent.get_local_mouse_position().y());
-    Vec2d center(mouse_pos.x() - cnv_half_width, cnv_half_height - mouse_pos.y());
-    center = center * inv_zoom;
+
+    const float cnv_inv_width  = 1.0f / cnv_width;
+    const float cnv_inv_height = 1.0f / cnv_height;
+
+    const Vec2d center = m_parent.get_local_mouse_position();
+    const float radius = m_cursor_radius * float(wxGetApp().plater()->get_camera().get_zoom());
 
     glsafe(::glLineWidth(1.5f));
     glsafe(::glDisable(GL_DEPTH_TEST));
 
-    glsafe(::glPushMatrix());
-    glsafe(::glLoadIdentity());
-    // ensure that the circle is renderered inside the frustrum
-    glsafe(::glTranslated(0.0, 0.0, -(camera.get_near_z() + 0.5)));
-    // ensure that the overlay fits the frustrum near z plane
-    const double gui_scale = camera.get_gui_scale();
-    glsafe(::glScaled(gui_scale, gui_scale, 1.0));
-
     glsafe(::glPushAttrib(GL_ENABLE_BIT));
     glsafe(::glLineStipple(4, 0xAAAA));
     glsafe(::glEnable(GL_LINE_STIPPLE));
 
-    if (!m_circle.is_initialized() || !m_old_center.isApprox(center) || std::abs(m_old_cursor_radius - m_cursor_radius) > EPSILON) {
+    if (!m_circle.is_initialized() || !m_old_center.isApprox(center) || std::abs(m_old_cursor_radius - radius) > EPSILON) {
+        m_old_cursor_radius = radius;
         m_old_center = center;
-        m_old_cursor_radius = m_cursor_radius;
         m_circle.reset();
 
         GLModel::Geometry init_data;
         static const unsigned int StepsCount = 32;
         static const float StepSize = 2.0f * float(PI) / float(StepsCount);
-        init_data.format = { GLModel::Geometry::EPrimitiveType::LineLoop, GLModel::Geometry::EVertexLayout::P2, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::LineLoop, GLModel::Geometry::EVertexLayout::P2 };
         init_data.color  = { 0.0f, 1.0f, 0.3f, 1.0f };
         init_data.reserve_vertices(StepsCount);
         init_data.reserve_indices(StepsCount);
@@ -209,8 +202,9 @@ void GLGizmoPainterBase::render_cursor_circle()
         // vertices + indices
         for (unsigned short i = 0; i < StepsCount; ++i) {
             const float angle = float(i * StepSize);
-            init_data.add_vertex(Vec2f(center.x() + ::cos(angle) * m_cursor_radius, center.y() + ::sin(angle) * m_cursor_radius));
-            init_data.add_ushort_index(i);
+            init_data.add_vertex(Vec2f(2.0f * ((center.x() + ::cos(angle) * radius) * cnv_inv_width - 0.5f),
+                                       -2.0f * ((center.y() + ::sin(angle) * radius) * cnv_inv_height - 0.5f)));
+            init_data.add_index(i);
         }
 
         m_circle.init_from(std::move(init_data));
@@ -225,15 +219,16 @@ void GLGizmoPainterBase::render_cursor_circle()
 
     m_circle.set_color(render_color);
 	
-    GLShaderProgram* shader = GUI::wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
+        shader->set_uniform("view_model_matrix", Transform3d::Identity());
+        shader->set_uniform("projection_matrix", Transform3d::Identity());
         m_circle.render();
         shader->stop_using();
     }
 
     glsafe(::glPopAttrib());
-    glsafe(::glPopMatrix());
     glsafe(::glEnable(GL_DEPTH_TEST));
 }
 
@@ -245,20 +240,13 @@ void GLGizmoPainterBase::render_cursor_sphere(const Transform3d& trafo) const
         s_sphere->init_from(its_make_sphere(1.0, double(PI) / 12.0));
     }
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader == nullptr)
         return;
 
     const Transform3d complete_scaling_matrix_inverse = Geometry::Transformation(trafo).get_matrix(true, true, false, true).inverse();
     const bool is_left_handed = Geometry::Transformation(trafo).is_left_handed();
 
-    glsafe(::glPushMatrix());
-    glsafe(::glMultMatrixd(trafo.data()));
-    // Inverse matrix of the instance scaling is applied so that the mark does not scale with the object.
-    glsafe(::glTranslatef(m_rr.hit.x(), m_rr.hit.y(), m_rr.hit.z()));
-    glsafe(::glMultMatrixd(complete_scaling_matrix_inverse.data()));
-    glsafe(::glScaled(m_cursor_radius, m_cursor_radius, m_cursor_radius));
-
     if (is_left_handed)
         glFrontFace(GL_CW);
 
@@ -270,6 +258,14 @@ void GLGizmoPainterBase::render_cursor_sphere(const Transform3d& trafo) const
         render_color = this->get_cursor_sphere_right_button_color();
     shader->start_using();
 
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    Transform3d view_model_matrix = camera.get_view_matrix() * trafo *
+        Geometry::assemble_transform(m_rr.hit.cast<double>()) * complete_scaling_matrix_inverse *
+        Geometry::assemble_transform(Vec3d::Zero(), Vec3d::Zero(), m_cursor_radius * Vec3d::Ones());
+
+    shader->set_uniform("view_model_matrix", view_model_matrix);
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+
     assert(s_sphere != nullptr);
     s_sphere->set_color(render_color);
     s_sphere->render();
@@ -277,13 +273,17 @@ void GLGizmoPainterBase::render_cursor_sphere(const Transform3d& trafo) const
     shader->stop_using();
     if (is_left_handed)
         glFrontFace(GL_CCW);
-
-    glsafe(::glPopMatrix());
 }
 
 // BBS
 void GLGizmoPainterBase::render_cursor_height_range(const Transform3d& trafo) const
 {
+    GLShaderProgram *shader = wxGetApp().get_shader("flat_attr");
+    if (shader == nullptr)
+        return;
+
+    shader->start_using();
+
     const BoundingBoxf3 box = bounding_box();
     Vec3d hit_world = trafo * Vec3d(m_rr.hit(0), m_rr.hit(1), m_rr.hit(2));
     float max_z = (float)box.max.z();
@@ -309,14 +309,18 @@ void GLGizmoPainterBase::render_cursor_height_range(const Transform3d& trafo) co
         for (int i = 0; i < zs.size(); i++) {
             update_contours(vol_mesh, zs[i], max_z, min_z);
 
-            glsafe(::glPushMatrix());
-            glsafe(::glTranslated(m_cut_contours.shift.x(), m_cut_contours.shift.y(), m_cut_contours.shift.z()));
+            const Camera& camera = wxGetApp().plater()->get_camera();
+            Transform3d view_model_matrix = camera.get_view_matrix()  * Geometry::assemble_transform(m_cut_contours.shift);
+
+            shader->set_uniform("view_model_matrix", view_model_matrix);
+            shader->set_uniform("projection_matrix", camera.get_projection_matrix());
             glsafe(::glLineWidth(2.0f));
             m_cut_contours.contours.render();
-            glsafe(::glPopMatrix());
         }
 
     }
+
+    shader->stop_using();
 }
 
 BoundingBoxf3 GLGizmoPainterBase::bounding_box() const
@@ -1056,7 +1060,7 @@ ColorRGBA TriangleSelectorGUI::get_seed_fill_color(const ColorRGBA& base_color)
         1.f};
 }
 
-void TriangleSelectorGUI::render(ImGuiWrapper* imgui)
+void TriangleSelectorGUI::render(ImGuiWrapper* imgui, const Transform3d& matrix)
 {
     if (m_update_render_data) {
         update_render_data();
@@ -1066,7 +1070,7 @@ void TriangleSelectorGUI::render(ImGuiWrapper* imgui)
     auto* shader = wxGetApp().get_current_shader();
     if (! shader)
         return;
-    assert(shader->get_name() == "gouraud");
+    assert(shader->get_name() == "gouraud_attr" || shader->get_name() == "mm_gouraud_attr");
     ScopeGuard guard([shader]() { if (shader) shader->set_uniform("offset_depth_buffer", false);});
     shader->set_uniform("offset_depth_buffer", true);
     for (auto iva : {std::make_pair(&m_iva_enforcers, enforcers_color),
@@ -1084,7 +1088,7 @@ void TriangleSelectorGUI::render(ImGuiWrapper* imgui)
         iva.render();
     }
 
-    render_paint_contour();
+    render_paint_contour(matrix);
 
 #ifdef PRUSASLICER_TRIANGLE_SELECTOR_DEBUG
     if (imgui)
@@ -1109,12 +1113,12 @@ void TriangleSelectorGUI::update_render_data()
     }
 
     GLModel::Geometry iva_enforcers_data;
-    iva_enforcers_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::UINT };
+    iva_enforcers_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     GLModel::Geometry iva_blockers_data;
-    iva_blockers_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::UINT };
+    iva_blockers_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     std::array<GLModel::Geometry, 3> iva_seed_fills_data;
     for (auto& data : iva_seed_fills_data)
-        data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::EIndexType::UINT };
+        data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
 
     for (const Triangle &tr : m_triangles) {
         bool is_valid = tr.valid();
@@ -1140,7 +1144,7 @@ void TriangleSelectorGUI::update_render_data()
         iva.add_vertex(v0, n);
         iva.add_vertex(v1, n);
         iva.add_vertex(v2, n);
-        iva.add_uint_triangle((unsigned int)cnt, (unsigned int)cnt + 1, (unsigned int)cnt + 2);
+        iva.add_triangle((unsigned int)cnt, (unsigned int)cnt + 1, (unsigned int)cnt + 2);
         cnt += 3;
     }
 
@@ -1164,7 +1168,7 @@ bool TrianglePatch::is_fragment() const
 
 float TriangleSelectorPatch::gap_area = TriangleSelectorPatch::GapAreaMin;
 
-void TriangleSelectorPatch::render(ImGuiWrapper* imgui)
+void TriangleSelectorPatch::render(ImGuiWrapper* imgui, const Transform3d& matrix)
 {
     if (m_update_render_data) {
         update_render_data();
@@ -1174,7 +1178,7 @@ void TriangleSelectorPatch::render(ImGuiWrapper* imgui)
     auto* shader = wxGetApp().get_current_shader();
     if (!shader)
         return;
-    assert(shader->get_name() == "mm_gouraud");
+    assert(shader->get_name() == "gouraud_attr" || shader->get_name() == "mm_gouraud_attr");
     GLint position_id    = -1;
     GLint barycentric_id = -1;
     if (wxGetApp().plater()->is_wireframe_enabled()) {
@@ -1212,7 +1216,7 @@ void TriangleSelectorPatch::render(ImGuiWrapper* imgui)
         }
     }
 
-    render_paint_contour();
+    render_paint_contour(matrix);
 }
 
 void TriangleSelectorPatch::update_triangles_per_type()
@@ -1631,10 +1635,14 @@ void TriangleSelectorGUI::render_debug(ImGuiWrapper* imgui)
     if (curr_shader != nullptr)
         curr_shader->stop_using();
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
 
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+
     ::glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
     for (vtype i : {ORIGINAL, SPLIT, INVALID}) {
         GLModel& va = m_varrays[i];
@@ -1661,35 +1669,37 @@ void TriangleSelectorGUI::update_paint_contour()
 
     GLModel::Geometry init_data;
     const std::vector<Vec2i> contour_edges = this->get_seed_fill_contour();
-    init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::index_type(2 * contour_edges.size()) };
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
     init_data.reserve_vertices(2 * contour_edges.size());
     init_data.reserve_indices(2 * contour_edges.size());
+    init_data.color = ColorRGBA::WHITE();
     // vertices + indices
     unsigned int vertices_count = 0;
     for (const Vec2i& edge : contour_edges) {
         init_data.add_vertex(m_vertices[edge(0)].v);
         init_data.add_vertex(m_vertices[edge(1)].v);
         vertices_count += 2;
-        if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-            init_data.add_ushort_line((unsigned short)vertices_count - 2, (unsigned short)vertices_count - 1);
-        else
-            init_data.add_uint_line(vertices_count - 2, vertices_count - 1);
+        init_data.add_line(vertices_count - 2, vertices_count - 1);
     }
 
     if (!init_data.is_empty())
         m_paint_contour.init_from(std::move(init_data));
 }
 
-void TriangleSelectorGUI::render_paint_contour()
+void TriangleSelectorGUI::render_paint_contour(const Transform3d& matrix)
 {
     auto* curr_shader = wxGetApp().get_current_shader();
     if (curr_shader != nullptr)
         curr_shader->stop_using();
 
-    auto* contour_shader = wxGetApp().get_shader("mm_contour");
+    auto* contour_shader = wxGetApp().get_shader("mm_contour_attr");
     if (contour_shader != nullptr) {
         contour_shader->start_using();
 
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        contour_shader->set_uniform("view_model_matrix", camera.get_view_matrix() * matrix);
+        contour_shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+
         glsafe(::glDepthFunc(GL_LEQUAL));
         m_paint_contour.render();
         glsafe(::glDepthFunc(GL_LESS));

src/slic3r/GUI/Gizmos/GLGizmoPainterBase.hpp

@@ -34,10 +34,8 @@ public:
         : TriangleSelector(mesh, edge_limit) {}
     virtual ~TriangleSelectorGUI() = default;
 
-    // Render current selection. Transformation matrices are supposed
-    // to be already set.
-    virtual void render(ImGuiWrapper *imgui);
-    void         render() { this->render(nullptr); }
+    virtual void render(ImGuiWrapper* imgui, const Transform3d& matrix);
+    void         render(const Transform3d& matrix) { this->render(nullptr, matrix); }
     void         set_wireframe_needed(bool need_wireframe) { m_need_wireframe = need_wireframe; }
     bool         get_wireframe_needed() { return m_need_wireframe; }
 
@@ -79,7 +77,7 @@ protected:
     GLModel                      m_paint_contour;
 
     void update_paint_contour();
-    void render_paint_contour();
+    void render_paint_contour(const Transform3d& matrix);
 
     bool                                m_need_wireframe {false};
 };
@@ -105,7 +103,7 @@ public:
 
     // Render current selection. Transformation matrices are supposed
     // to be already set.
-    void render(ImGuiWrapper* imgui) override;
+    void render(ImGuiWrapper* imgui, const Transform3d& matrix) override;
     // TriangleSelector.m_triangles => m_gizmo_scene.triangle_patches
     void update_triangles_per_type();
     // m_gizmo_scene.triangle_patches => TriangleSelector.m_triangles

src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp

@@ -126,14 +126,19 @@ void GLGizmoRotate::on_render()
 
     glsafe(::glEnable(GL_DEPTH_TEST));
 
-    glsafe(::glPushMatrix());
-    transform_to_local(selection);
+    m_grabbers.front().matrix = local_transform(selection);
 
     glsafe(::glLineWidth((m_hover_id != -1) ? 2.0f : 1.5f));
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
 
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        Transform3d view_model_matrix = camera.get_view_matrix() * m_grabbers.front().matrix;
+
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+
         const bool radius_changed = std::abs(m_old_radius - m_radius) > EPSILON;
         m_old_radius = m_radius;
 
@@ -152,6 +157,8 @@ void GLGizmoRotate::on_render()
         render_grabber_connection(color, radius_changed);
         shader->stop_using();
     }
+    glsafe(::glPushMatrix());
+    transform_to_local(selection);
 
     render_grabber(box);
     render_grabber_extension(box, false);
@@ -165,15 +172,11 @@ void GLGizmoRotate::on_render_for_picking()
 
     glsafe(::glDisable(GL_DEPTH_TEST));
 
-    glsafe(::glPushMatrix());
-
-    transform_to_local(selection);
+    m_grabbers.front().matrix = local_transform(selection);
 
     const BoundingBoxf3& box = selection.get_bounding_box();
     render_grabbers_for_picking(box);
     render_grabber_extension(box, true);
-
-    glsafe(::glPopMatrix());
 }
 
 //BBS: add input window for move
@@ -214,7 +217,7 @@ void GLGizmoRotate::render_circle(const ColorRGBA& color, bool radius_changed)
         m_circle.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::LineLoop, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::LineLoop, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(ScaleStepsCount);
         init_data.reserve_indices(ScaleStepsCount);
 
@@ -222,7 +225,7 @@ void GLGizmoRotate::render_circle(const ColorRGBA& color, bool radius_changed)
         for (unsigned short i = 0; i < ScaleStepsCount; ++i) {
             const float angle = float(i * ScaleStepRad);
             init_data.add_vertex(Vec3f(::cos(angle) * m_radius, ::sin(angle) * m_radius, 0.0f));
-            init_data.add_ushort_index(i);
+            init_data.add_index(i);
         }
 
         m_circle.init_from(std::move(init_data));
@@ -241,7 +244,7 @@ void GLGizmoRotate::render_scale(const ColorRGBA& color, bool radius_changed)
         m_scale.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(2 * ScaleStepsCount);
         init_data.reserve_indices(2 * ScaleStepsCount);
 
@@ -257,8 +260,8 @@ void GLGizmoRotate::render_scale(const ColorRGBA& color, bool radius_changed)
 
             init_data.add_vertex(Vec3f(in_x, in_y, 0.0f));
             init_data.add_vertex(Vec3f(out_x, out_y, 0.0f));
-            init_data.add_ushort_index(i * 2);
-            init_data.add_ushort_index(i * 2 + 1);
+            init_data.add_index(i * 2);
+            init_data.add_index(i * 2 + 1);
         }
 
         m_scale.init_from(std::move(init_data));
@@ -278,7 +281,7 @@ void GLGizmoRotate::render_snap_radii(const ColorRGBA& color, bool radius_change
         m_snap_radii.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(2 * ScaleStepsCount);
         init_data.reserve_indices(2 * ScaleStepsCount);
 
@@ -294,8 +297,8 @@ void GLGizmoRotate::render_snap_radii(const ColorRGBA& color, bool radius_change
 
             init_data.add_vertex(Vec3f(in_x, in_y, 0.0f));
             init_data.add_vertex(Vec3f(out_x, out_y, 0.0f));
-            init_data.add_ushort_index(i * 2);
-            init_data.add_ushort_index(i * 2 + 1);
+            init_data.add_index(i * 2);
+            init_data.add_index(i * 2 + 1);
         }
 
         m_snap_radii.init_from(std::move(init_data));
@@ -311,7 +314,7 @@ void GLGizmoRotate::render_reference_radius(const ColorRGBA& color, bool radius_
         m_reference_radius.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(2);
         init_data.reserve_indices(2);
 
@@ -320,7 +323,7 @@ void GLGizmoRotate::render_reference_radius(const ColorRGBA& color, bool radius_
         init_data.add_vertex(Vec3f(m_radius * (1.0f + GrabberOffset), 0.0f, 0.0f));
 
         // indices
-        init_data.add_ushort_line(0, 1);
+        init_data.add_line(0, 1);
 
         m_reference_radius.init_from(std::move(init_data));
     }
@@ -341,7 +344,7 @@ void GLGizmoRotate::render_angle_arc(const ColorRGBA& color, bool radius_changed
         m_angle_arc.reset();
         if (m_angle > 0.0f) {
             GLModel::Geometry init_data;
-            init_data.format = { GLModel::Geometry::EPrimitiveType::LineStrip, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+            init_data.format = { GLModel::Geometry::EPrimitiveType::LineStrip, GLModel::Geometry::EVertexLayout::P3 };
             init_data.reserve_vertices(1 + AngleResolution);
             init_data.reserve_indices(1 + AngleResolution);
 
@@ -349,7 +352,7 @@ void GLGizmoRotate::render_angle_arc(const ColorRGBA& color, bool radius_changed
             for (unsigned short i = 0; i <= AngleResolution; ++i) {
                 const float angle = float(i) * step_angle;
                 init_data.add_vertex(Vec3f(::cos(angle) * ex_radius, ::sin(angle) * ex_radius, 0.0f));
-                init_data.add_ushort_index(i);
+                init_data.add_index(i);
             }
 
             m_angle_arc.init_from(std::move(init_data));
@@ -367,7 +370,7 @@ void GLGizmoRotate::render_grabber_connection(const ColorRGBA& color, bool radiu
         m_grabber_connection.old_center = m_grabbers.front().center;
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(2);
         init_data.reserve_indices(2);
 
@@ -376,7 +379,7 @@ void GLGizmoRotate::render_grabber_connection(const ColorRGBA& color, bool radiu
         init_data.add_vertex((Vec3f)m_grabbers.front().center.cast<float>());
 
         // indices
-        init_data.add_ushort_line(0, 1);
+        init_data.add_line(0, 1);
 
         m_grabber_connection.model.init_from(std::move(init_data));
     }
@@ -401,36 +404,69 @@ void GLGizmoRotate::render_grabber_extension(const BoundingBoxf3& box, bool pick
     if (!picking && m_hover_id != -1)
         color = m_grabbers.front().hover_color;
 
-    GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat" : "gouraud_light");
+    GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat_attr" : "gouraud_light_attr");
     if (shader == nullptr)
         return;
 
     m_cone.set_color(color);
+
     shader->start_using();
     shader->set_uniform("emission_factor", 0.1f);
 
     const Vec3d& center = m_grabbers.front().center;
 
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(center.x(), center.y(), center.z()));
-    glsafe(::glRotated(Geometry::rad2deg(m_angle), 0.0, 0.0, 1.0));
-    glsafe(::glRotated(90.0, 1.0, 0.0, 0.0));
-    glsafe(::glTranslated(0.0, 0.0, 1.5 * size));
-    glsafe(::glScaled(0.75 * size, 0.75 * size, 3.0 * size));
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d& view_matrix = camera.get_view_matrix();
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+
+    Transform3d view_model_matrix = view_matrix * m_grabbers.front().matrix *
+        Geometry::assemble_transform(center, Vec3d(0.5 * PI, 0.0, m_angle)) *
+        Geometry::assemble_transform(1.5 * size * Vec3d::UnitZ(), Vec3d::Zero(), Vec3d(0.75 * size, 0.75 * size, 3.0 * size));
+
+    shader->set_uniform("view_model_matrix", view_model_matrix);
+    shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
     m_cone.render();
-    glsafe(::glPopMatrix());
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(center.x(), center.y(), center.z()));
-    glsafe(::glRotated(Geometry::rad2deg(m_angle), 0.0, 0.0, 1.0));
-    glsafe(::glRotated(-90.0, 1.0, 0.0, 0.0));
-    glsafe(::glTranslated(0.0, 0.0, 1.5 * size));
-    glsafe(::glScaled(0.75 * size, 0.75 * size, 3.0 * size));
+    view_model_matrix = view_matrix * m_grabbers.front().matrix *
+        Geometry::assemble_transform(center, Vec3d(-0.5 * PI, 0.0, m_angle)) *
+        Geometry::assemble_transform(1.5 * size * Vec3d::UnitZ(), Vec3d::Zero(), Vec3d(0.75 * size, 0.75 * size, 3.0 * size));
+
+    shader->set_uniform("view_model_matrix", view_model_matrix);
+    shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
     m_cone.render();
-    glsafe(::glPopMatrix());
 
     shader->stop_using();
 }
 
+Transform3d GLGizmoRotate::local_transform(const Selection& selection) const
+{
+    Transform3d ret;
+
+    switch (m_axis)
+    {
+    case X:
+    {
+        ret = Geometry::assemble_transform(Vec3d::Zero(), Vec3d(0.0, 0.5 * PI, 0.0)) * Geometry::assemble_transform(Vec3d::Zero(), Vec3d(0.0, 0.0, -0.5 * PI));
+        break;
+    }
+    case Y:
+    {
+        ret = Geometry::assemble_transform(Vec3d::Zero(), Vec3d(0.0, 0.0, -0.5 * PI)) * Geometry::assemble_transform(Vec3d::Zero(), Vec3d(0.0, -0.5 * PI, 0.0));
+        break;
+    }
+    default:
+    case Z:
+    {
+        ret = Transform3d::Identity();
+        break;
+    }
+    }
+
+    if (selection.is_single_volume() || selection.is_single_modifier() || selection.requires_local_axes())
+        ret = selection.get_volume(*selection.get_volume_idxs().begin())->get_instance_transformation().get_matrix(true, false, true, true) * ret;
+
+    return Geometry::assemble_transform(m_center) * ret;
+}
+
 void GLGizmoRotate::transform_to_local(const Selection& selection) const
 {
     glsafe(::glTranslated(m_center.x(), m_center.y(), m_center.z()));

src/slic3r/GUI/Gizmos/GLGizmoRotate.hpp

@@ -85,6 +85,8 @@ private:
     void render_grabber(const BoundingBoxf3& box);
     void render_grabber_extension(const BoundingBoxf3& box, bool picking);
 
+    Transform3d local_transform(const Selection& selection) const;
+
     void transform_to_local(const Selection& selection) const;
     // returns the intersection of the mouse ray with the plane perpendicular to the gizmo axis, in local coordinate
     Vec3d mouse_position_in_local_plane(const Linef3& mouse_ray, const Selection& selection) const;

src/slic3r/GUI/Gizmos/GLGizmoScale.cpp

@@ -2,6 +2,7 @@
 #include "GLGizmoScale.hpp"
 #include "slic3r/GUI/GLCanvas3D.hpp"
 #include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/Plater.hpp"
 
 #include <GL/glew.h>
 
@@ -185,11 +186,11 @@ void GLGizmoScale3D::on_render()
         m_box = selection.get_bounding_box();
 
     const Vec3d& center = m_box.center();
-    Vec3d offset_x = offsets_transform * Vec3d((double)Offset, 0.0, 0.0);
-    Vec3d offset_y = offsets_transform * Vec3d(0.0, (double)Offset, 0.0);
-    Vec3d offset_z = offsets_transform * Vec3d(0.0, 0.0, (double)Offset);
+    const Vec3d offset_x = offsets_transform * Vec3d((double)Offset, 0.0, 0.0);
+    const Vec3d offset_y = offsets_transform * Vec3d(0.0, (double)Offset, 0.0);
+    const Vec3d offset_z = offsets_transform * Vec3d(0.0, 0.0, (double)Offset);
 
-    bool ctrl_down = (m_dragging && m_starting.ctrl_down) || (!m_dragging && wxGetKeyState(WXK_CONTROL));
+    const bool ctrl_down = (m_dragging && m_starting.ctrl_down) || (!m_dragging && wxGetKeyState(WXK_CONTROL));
 
     // x axis
     m_grabbers[0].center = m_transform * Vec3d(m_box.min.x(), center.y(), m_box.min.z());
@@ -230,14 +231,17 @@ void GLGizmoScale3D::on_render()
 
     const BoundingBoxf3& selection_box = selection.get_bounding_box();
 
-    float grabber_mean_size = (float)((selection_box.size().x() + selection_box.size().y() + selection_box.size().z()) / 3.0);
+    const float grabber_mean_size = (float)((selection_box.size().x() + selection_box.size().y() + selection_box.size().z()) / 3.0);
 
     //draw connections
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
         // BBS: when select multiple objects, uniform scale can be deselected, display the connection(4,5)
         //if (single_instance || single_volume) {
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
         if (m_grabbers[4].enabled && m_grabbers[5].enabled)
             render_grabbers_connection(4, 5, m_grabbers[4].color);
         render_grabbers_connection(6, 7, m_grabbers[2].color);
@@ -279,7 +283,7 @@ void GLGizmoScale3D::render_grabbers_connection(unsigned int id_1, unsigned int
         m_grabber_connections[id].model.reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(2);
         init_data.reserve_indices(2);
 
@@ -288,7 +292,7 @@ void GLGizmoScale3D::render_grabbers_connection(unsigned int id_1, unsigned int
         init_data.add_vertex((Vec3f)m_grabbers[id_2].center.cast<float>());
 
         // indices
-        init_data.add_ushort_line(0, 1);
+        init_data.add_line(0, 1);
 
         m_grabber_connections[id].model.init_from(std::move(init_data));
     }

src/slic3r/GUI/Gizmos/GLGizmoSeam.cpp

@@ -98,7 +98,7 @@ bool GLGizmoSeam::on_key_down_select_tool_type(int keyCode) {
 void GLGizmoSeam::render_triangles(const Selection& selection) const
 {
     ClippingPlaneDataWrapper clp_data = this->get_clipping_plane_data();
-    auto* shader = wxGetApp().get_shader("mm_gouraud");
+    auto* shader = wxGetApp().get_shader("mm_gouraud_attr");
     if (!shader)
         return;
     shader->start_using();
@@ -120,8 +120,11 @@ void GLGizmoSeam::render_triangles(const Selection& selection) const
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CW));
 
-        glsafe(::glPushMatrix());
-        glsafe(::glMultMatrixd(trafo_matrix.data()));
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        const Transform3d matrix = camera.get_view_matrix() * trafo_matrix;
+        shader->set_uniform("view_model_matrix", matrix);
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        shader->set_uniform("normal_matrix", (Matrix3d)matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
 
         float normal_z = -::cos(Geometry::deg2rad(m_highlight_by_angle_threshold_deg));
         Matrix3f normal_matrix = static_cast<Matrix3f>(trafo_matrix.matrix().block(0, 0, 3, 3).inverse().transpose().cast<float>());
@@ -129,11 +132,10 @@ void GLGizmoSeam::render_triangles(const Selection& selection) const
         shader->set_uniform("volume_world_matrix", trafo_matrix);
         shader->set_uniform("volume_mirrored", is_left_handed);
         shader->set_uniform("slope.actived", m_parent.is_using_slope());
-        shader->set_uniform("slope.volume_world_normal_matrix", static_cast<Matrix3f>(trafo_matrix.matrix().block(0, 0, 3, 3).inverse().transpose().cast<float>()));
+        shader->set_uniform("slope.volume_world_normal_matrix", normal_matrix);
         shader->set_uniform("slope.normal_z", normal_z);
-        m_triangle_selectors[mesh_id]->render(m_imgui);
+        m_triangle_selectors[mesh_id]->render(m_imgui, trafo_matrix);
 
-        glsafe(::glPopMatrix());
         if (is_left_handed)
             glsafe(::glFrontFace(GL_CCW));
     }

src/slic3r/GUI/Gizmos/GLGizmoSimplify.cpp

@@ -641,19 +641,25 @@ void GLGizmoSimplify::on_render()
         return;
 
     const Transform3d trafo_matrix = selected_volume->world_matrix();
-    glsafe(::glPushMatrix());
-    glsafe(::glMultMatrixd(trafo_matrix.data()));
-
-    auto *gouraud_shader = wxGetApp().get_shader("gouraud_light");
+    auto* gouraud_shader = wxGetApp().get_shader("gouraud_light_attr");
     glsafe(::glPushAttrib(GL_DEPTH_TEST));
     glsafe(::glEnable(GL_DEPTH_TEST));
     gouraud_shader->start_using();
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d view_model_matrix = camera.get_view_matrix() * trafo_matrix;
+    gouraud_shader->set_uniform("view_model_matrix", view_model_matrix);
+    gouraud_shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+    gouraud_shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
     m_glmodel.render();
     gouraud_shader->stop_using();
 
     if (m_show_wireframe) {
-        auto* contour_shader = wxGetApp().get_shader("mm_contour");
+        auto* contour_shader = wxGetApp().get_shader("mm_contour_attr");
         contour_shader->start_using();
+        contour_shader->set_uniform("view_model_matrix", view_model_matrix);
+        contour_shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+        const ColorRGBA color = m_glmodel.get_color();
+        m_glmodel.set_color(ColorRGBA::WHITE());
         glsafe(::glLineWidth(1.0f));
         glsafe(::glPolygonMode(GL_FRONT_AND_BACK, GL_LINE));
         //ScopeGuard offset_fill_guard([]() { glsafe(::glDisable(GL_POLYGON_OFFSET_FILL)); });
@@ -661,11 +667,11 @@ void GLGizmoSimplify::on_render()
         //glsafe(::glPolygonOffset(5.0, 5.0));
         m_glmodel.render();
         glsafe(::glPolygonMode(GL_FRONT_AND_BACK, GL_FILL));
+        m_glmodel.set_color(color);
         contour_shader->stop_using();
     }
 
     glsafe(::glPopAttrib());
-    glsafe(::glPopMatrix());
 }
 
 

src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp

@@ -127,7 +127,7 @@ void GLGizmoSlaSupports::render_points(const Selection& selection, bool picking)
     if (! has_points && ! has_holes)
         return;
 
-    GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat" : "gouraud_light");
+    GLShaderProgram* shader = picking ? wxGetApp().get_shader("flat_attr") : wxGetApp().get_shader("gouraud_light_attr");
     if (shader == nullptr)
         return;
 
@@ -136,12 +136,13 @@ void GLGizmoSlaSupports::render_points(const Selection& selection, bool picking)
 
     const GLVolume* vol = selection.get_volume(*selection.get_volume_idxs().begin());
     const Transform3d instance_scaling_matrix_inverse = vol->get_instance_transformation().get_matrix(true, true, false, true).inverse();
-    const Transform3d& instance_matrix = vol->get_instance_transformation().get_matrix();
-    const float z_shift = m_c->selection_info()->get_sla_shift();
+    const Transform3d instance_matrix = Geometry::assemble_transform(m_c->selection_info()->get_sla_shift() * Vec3d::UnitZ()) * vol->get_instance_transformation().get_matrix();
 
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(0.0, 0.0, z_shift));
-    glsafe(::glMultMatrixd(instance_matrix.data()));
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d& view_matrix = camera.get_view_matrix();
+    const Transform3d& projection_matrix = camera.get_projection_matrix();
+
+    shader->set_uniform("projection_matrix", projection_matrix);
 
     ColorRGBA render_color;
     for (size_t i = 0; i < cache_size; ++i) {
@@ -179,9 +180,7 @@ void GLGizmoSlaSupports::render_points(const Selection& selection, bool picking)
             shader->set_uniform("emission_factor", 0.5f);
 
         // Inverse matrix of the instance scaling is applied so that the mark does not scale with the object.
-        glsafe(::glPushMatrix());
-        glsafe(::glTranslatef(support_point.pos.x(), support_point.pos.y(), support_point.pos.z()));
-        glsafe(::glMultMatrixd(instance_scaling_matrix_inverse.data()));
+        const Transform3d support_matrix = Geometry::assemble_transform(support_point.pos.cast<double>()) * instance_scaling_matrix_inverse;
 
         if (vol->is_left_handed())
             glFrontFace(GL_CW);
@@ -194,27 +193,29 @@ void GLGizmoSlaSupports::render_points(const Selection& selection, bool picking)
                 m_c->raycaster()->raycaster()->get_closest_point(m_editing_cache[i].support_point.pos, &m_editing_cache[i].normal);
 
             Eigen::Quaterniond q;
-            q.setFromTwoVectors(Vec3d{0., 0., 1.}, instance_scaling_matrix_inverse * m_editing_cache[i].normal.cast<double>());
+            q.setFromTwoVectors(Vec3d::UnitZ(), instance_scaling_matrix_inverse * m_editing_cache[i].normal.cast<double>());
             const Eigen::AngleAxisd aa(q);
-            glsafe(::glPushMatrix());
-            glsafe(::glRotated(aa.angle() * (180. / M_PI), aa.axis().x(), aa.axis().y(), aa.axis().z()));
             const double cone_radius = 0.25; // mm
             const double cone_height = 0.75;
-            glsafe(::glTranslatef(0.f, 0.f, cone_height + support_point.head_front_radius * RenderPointScale));
-            glsafe(::glRotated(180., 1., 0., 0.));
-            glsafe(::glScaled(cone_radius, cone_radius, cone_height));
+            const Transform3d view_model_matrix = view_matrix * instance_matrix * support_matrix * Transform3d(aa.toRotationMatrix()) *
+                Geometry::assemble_transform((cone_height + support_point.head_front_radius * RenderPointScale) * Vec3d::UnitZ(),
+                    Vec3d(PI, 0.0, 0.0), Vec3d(cone_radius, cone_radius, cone_height));
+
+            shader->set_uniform("view_model_matrix", view_model_matrix);
+            shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
             m_cone.render();
-            glsafe(::glPopMatrix());
         }
 
         const double radius = (double)support_point.head_front_radius * RenderPointScale;
-        glsafe(::glScaled(radius, radius, radius));
+        const Transform3d view_model_matrix = view_matrix * instance_matrix * support_matrix *
+            Geometry::assemble_transform(Vec3d::Zero(), Vec3d::Zero(), radius * Vec3d::Ones());
+
+        shader->set_uniform("view_model_matrix", view_model_matrix);
+        shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_sphere.render();
 
         if (vol->is_left_handed())
             glFrontFace(GL_CCW);
-
-        glsafe(::glPopMatrix());
     }
 
     // Now render the drain holes:
@@ -226,31 +227,26 @@ void GLGizmoSlaSupports::render_points(const Selection& selection, bool picking)
             if (is_mesh_point_clipped(drain_hole.pos.cast<double>()))
                 continue;
 
-            // Inverse matrix of the instance scaling is applied so that the mark does not scale with the object.
-            glsafe(::glPushMatrix());
-            glsafe(::glTranslatef(drain_hole.pos.x(), drain_hole.pos.y(), drain_hole.pos.z()));
-            glsafe(::glMultMatrixd(instance_scaling_matrix_inverse.data()));
+            const Transform3d hole_matrix = Geometry::assemble_transform(drain_hole.pos.cast<double>()) * instance_scaling_matrix_inverse;
 
             if (vol->is_left_handed())
                 glFrontFace(GL_CW);
 
             // Matrices set, we can render the point mark now.
-
             Eigen::Quaterniond q;
-            q.setFromTwoVectors(Vec3d{0., 0., 1.}, instance_scaling_matrix_inverse * (-drain_hole.normal).cast<double>());
+            q.setFromTwoVectors(Vec3d::UnitZ(), instance_scaling_matrix_inverse * (-drain_hole.normal).cast<double>());
             const Eigen::AngleAxisd aa(q);
-            glsafe(::glRotated(aa.angle() * (180. / M_PI), aa.axis().x(), aa.axis().y(), aa.axis().z()));
-            glsafe(::glTranslated(0., 0., -drain_hole.height));
-            glsafe(::glScaled(drain_hole.radius, drain_hole.radius, drain_hole.height + sla::HoleStickOutLength));
+            const Transform3d view_model_matrix = view_matrix * instance_matrix * hole_matrix * Transform3d(aa.toRotationMatrix()) *
+                Geometry::assemble_transform(-drain_hole.height * Vec3d::UnitZ(), Vec3d::Zero(), Vec3d(drain_hole.radius, drain_hole.radius, drain_hole.height + sla::HoleStickOutLength));
+
+            shader->set_uniform("view_model_matrix", view_model_matrix);
+            shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
             m_cylinder.render();
 
             if (vol->is_left_handed())
                 glFrontFace(GL_CCW);
-            glsafe(::glPopMatrix());
         }
     }
-
-    glsafe(::glPopMatrix());
 }
 
 

src/slic3r/GUI/Gizmos/GLGizmoText.cpp

@@ -448,7 +448,7 @@ void GLGizmoText::on_render()
         ColorRGBA color = picking_color_component(0);
         m_grabbers[0].color        = color;
 
-        GLShaderProgram *shader    = wxGetApp().get_shader("gouraud_light");
+        GLShaderProgram *shader    = wxGetApp().get_shader("gouraud_light_attr");
         if (shader != nullptr) {
             shader->start_using();
             m_grabbers[0].render_for_picking(mean_size);
@@ -500,14 +500,12 @@ void GLGizmoText::on_render_for_picking()
             ColorRGBA color = picking_color_component(0);
             m_grabbers[0].color        = color;
 
-            GLShaderProgram *shader    = wxGetApp().get_shader("flat");
+            GLShaderProgram *shader    = wxGetApp().get_shader("flat_attr");
             if (shader != nullptr) {
-                glsafe(::glPushMatrix());
                 shader->start_using();
                 m_grabbers[0].render_for_picking(mean_size);
 
                 shader->stop_using();
-                glsafe(::glPopMatrix());
             }
         }
     }

src/slic3r/GUI/Gizmos/GLGizmosCommon.cpp

@@ -214,15 +214,14 @@ void InstancesHider::render_cut() const
             ClippingPlane clp = *get_pool()->object_clipper()->get_clipping_plane();
             clp.set_normal(-clp.get_normal());
             clipper->set_limiting_plane(clp);
-        } else
+        }
+        else
             clipper->set_limiting_plane(ClippingPlane::ClipsNothing());
 
-        glsafe(::glPushMatrix());
         glsafe(::glPushAttrib(GL_DEPTH_TEST));
         glsafe(::glDisable(GL_DEPTH_TEST));
         clipper->render_cut(mv->is_model_part() ? ColorRGBA(0.8f, 0.3f, 0.0f, 1.0f) : color_from_model_volume(*mv));
         glsafe(::glPopAttrib());
-        glsafe(::glPopMatrix());
 
         ++clipper_id;
     }
@@ -412,7 +411,7 @@ void ObjectClipper::render_cut() const
 
     size_t clipper_id = 0;
     for (const ModelVolume* mv : mo->volumes) {
-        Geometry::Transformation vol_trafo  = mv->get_transformation();
+        const Geometry::Transformation vol_trafo  = mv->get_transformation();
         Geometry::Transformation trafo = inst_trafo * vol_trafo;
         if (is_assem_cnv) {
             trafo.set_offset(trafo.get_offset() + offset_to_assembly * (GLVolume::explosion_ratio - 1.0) + vol_trafo.get_offset() * (GLVolume::explosion_ratio - 1.0));
@@ -427,10 +426,8 @@ void ObjectClipper::render_cut() const
             clipper->set_limiting_plane(ClippingPlane(Vec3d::UnitZ(), std::numeric_limits<double>::max()));
         else
             clipper->set_limiting_plane(ClippingPlane(Vec3d::UnitZ(), -SINKING_Z_THRESHOLD));
-        glsafe(::glPushMatrix());
         // BBS
         clipper->render_cut({ 0.25f, 0.25f, 0.25f, 1.0f });
-        glsafe(::glPopMatrix());
 
         ++clipper_id;
     }
@@ -557,7 +554,7 @@ void SupportsClipper::render_cut() const
 
     const SelectionInfo* sel_info = get_pool()->selection_info();
     const ModelObject* mo = sel_info->model_object();
-    Geometry::Transformation inst_trafo = mo->instances[sel_info->get_active_instance()]->get_transformation();
+    const Geometry::Transformation inst_trafo = mo->instances[sel_info->get_active_instance()]->get_transformation();
     //Geometry::Transformation vol_trafo  = mo->volumes.front()->get_transformation();
     Geometry::Transformation trafo = inst_trafo;// * vol_trafo;
     trafo.set_offset(trafo.get_offset() + Vec3d(0., 0., sel_info->get_sla_shift()));
@@ -576,9 +573,7 @@ void SupportsClipper::render_cut() const
     m_clipper->set_plane(*ocl->get_clipping_plane());
     m_clipper->set_transformation(supports_trafo);
 
-    glsafe(::glPushMatrix());
     m_clipper->render_cut({ 1.0f, 0.f, 0.37f, 1.0f });
-    glsafe(::glPopMatrix());
 }
 
 

src/slic3r/GUI/Gizmos/GLGizmosManager.cpp

@@ -85,7 +85,9 @@ size_t GLGizmosManager::get_gizmo_idx_from_mouse(const Vec2d& mouse_pos) const
     float width = get_scaled_total_width();
 #if BBS_TOOLBAR_ON_TOP
     //float space_width = GLGizmosManager::Default_Icons_Size * wxGetApp().toolbar_icon_scale();;
-    float top_x = std::max(m_parent.get_main_toolbar_width() + border, 0.5f * (cnv_w - width + m_parent.get_main_toolbar_width() + m_parent.get_collapse_toolbar_width() - m_parent.get_assemble_view_toolbar_width()) + border);
+    const float separator_width = m_parent.get_separator_toolbar_width();
+    float top_x = std::max(0.0f, 0.5f * (cnv_w - (width + separator_width + m_parent.get_main_toolbar_width() - m_parent.get_collapse_toolbar_width() + m_parent.get_assemble_view_toolbar_width())));
+    top_x += m_parent.get_main_toolbar_width() + separator_width / 2 + border;
     if (m_parent.get_canvas_type() == GLCanvas3D::CanvasAssembleView)
         top_x = 0.5f * cnv_w + 0.5f * (m_parent.get_assembly_paint_toolbar_width());
     float top_y = 0;
@@ -1277,28 +1279,28 @@ void GLGizmosManager::update_after_undo_redo(const UndoRedo::Snapshot& snapshot)
         dynamic_cast<GLGizmoSlaSupports*>(m_gizmos[SlaSupports].get())->reslice_SLA_supports(true);
 }
 
-void GLGizmosManager::render_background(float left, float top, float right, float bottom, float border) const
+void GLGizmosManager::render_background(float left, float top, float right, float bottom, float border_w, float border_h) const
 {
     const unsigned int tex_id = m_background_texture.texture.get_id();
     const float tex_width = float(m_background_texture.texture.get_width());
     const float tex_height = float(m_background_texture.texture.get_height());
     if (tex_id != 0 && tex_width > 0 && tex_height > 0) {
         //BBS: GUI refactor: remove the corners of gizmo
-        const float inv_tex_width = (tex_width != 0.0f) ? 1.0f / tex_width : 0.0f;
-        const float inv_tex_height = (tex_height != 0.0f) ? 1.0f / tex_height : 0.0f;
+        const float inv_tex_width  = 1.0f / tex_width;
+        const float inv_tex_height = 1.0f / tex_height;
 
-        const float internal_left_uv = (float)m_background_texture.metadata.left * inv_tex_width;
-        const float internal_right_uv = 1.0f - (float)m_background_texture.metadata.right * inv_tex_width;
-        const float internal_top_uv = 1.0f - (float)m_background_texture.metadata.top * inv_tex_height;
-        const float internal_bottom_uv = (float)m_background_texture.metadata.bottom * inv_tex_height;
+        const float internal_left_uv   = float(m_background_texture.metadata.left) * inv_tex_width;
+        const float internal_right_uv  = 1.0f - float(m_background_texture.metadata.right) * inv_tex_width;
+        const float internal_top_uv    = 1.0f - float(m_background_texture.metadata.top) * inv_tex_height;
+        const float internal_bottom_uv = float(m_background_texture.metadata.bottom) * inv_tex_height;
 
         GLTexture::render_sub_texture(tex_id, left, right, bottom, top, { { internal_left_uv, internal_bottom_uv }, { internal_right_uv, internal_bottom_uv }, { internal_right_uv, internal_top_uv }, { internal_left_uv, internal_top_uv } });
 
         /*
-        const float internal_left = left + border;
-        const float internal_right = right - border;
-        const float internal_top = top - border;
-        const float internal_bottom = bottom + border;
+        const float internal_left   = left + border_w;
+        const float internal_right  = right - border_w;
+        const float internal_top    = top - border_h;
+        const float internal_bottom = bottom + border_h;
 
         // float left_uv = 0.0f;
         const float right_uv = 1.0f;
@@ -1383,119 +1385,98 @@ void GLGizmosManager::render_arrow(const GLCanvas3D& parent, EType highlighted_t
 //when rendering, {0, 0} is at the center, {-0.5, 0.5} at the left-top
 void GLGizmosManager::do_render_overlay() const
 {
-    std::vector<size_t> selectable_idxs = get_selectable_idxs();
+    const std::vector<size_t> selectable_idxs = get_selectable_idxs();
     if (selectable_idxs.empty())
         return;
 
-    float cnv_w = (float)m_parent.get_canvas_size().get_width();
-    float cnv_h = (float)m_parent.get_canvas_size().get_height();
-    float zoom = (float)wxGetApp().plater()->get_camera().get_zoom();
-    float inv_zoom = (float)wxGetApp().plater()->get_camera().get_inv_zoom();
+    const Size cnv_size = m_parent.get_canvas_size();
+    const float cnv_w = (float)cnv_size.get_width();
+    const float cnv_h = (float)cnv_size.get_height();
 
-    float height = get_scaled_total_height();
-    float width = get_scaled_total_width();
-    float zoomed_border = m_layout.scaled_border() * inv_zoom;
+    if (cnv_w == 0 || cnv_h == 0)
+        return;
 
-    float zoomed_top_x;
+    const float inv_cnv_w = 1.0f / cnv_w;
+    const float inv_cnv_h = 1.0f / cnv_h;
+
+    const float height = 2.0f * get_scaled_total_height() * inv_cnv_h;
+    const float width  = 2.0f * get_scaled_total_width() * inv_cnv_w;
+    const float border_h = 2.0f * m_layout.scaled_border() * inv_cnv_h;
+    const float border_w = 2.0f * m_layout.scaled_border() * inv_cnv_w;
+
+    float top_x;
     if (m_parent.get_canvas_type() == GLCanvas3D::CanvasAssembleView) {
-        zoomed_top_x = 0.5f * m_parent.get_assembly_paint_toolbar_width() * inv_zoom;
+        top_x = m_parent.get_assembly_paint_toolbar_width() * inv_cnv_w;
     }
     else {
         //BBS: GUI refactor: GLToolbar&&Gizmo adjust
-#if BBS_TOOLBAR_ON_TOP
         float main_toolbar_width = (float)m_parent.get_main_toolbar_width();
         float assemble_view_width = (float)m_parent.get_assemble_view_toolbar_width();
         float collapse_width = (float)m_parent.get_collapse_toolbar_width();
+        float separator_width = (float)m_parent.get_separator_toolbar_width();
         //float space_width = GLGizmosManager::Default_Icons_Size * wxGetApp().toolbar_icon_scale();
         //float zoomed_top_x = 0.5f *(cnv_w + main_toolbar_width - 2 * space_width - width) * inv_zoom;
 
-        float main_toolbar_left = std::max(-0.5f * cnv_w, -0.5f * (main_toolbar_width + get_scaled_total_width() + assemble_view_width - collapse_width)) * inv_zoom;
+        float main_toolbar_left = std::max(-0.5f * cnv_w, -0.5f * (main_toolbar_width + get_scaled_total_width() + assemble_view_width + separator_width - collapse_width));
         //float zoomed_top_x = 0.5f *(main_toolbar_width + collapse_width - width - assemble_view_width) * inv_zoom;
-        zoomed_top_x = main_toolbar_left + (main_toolbar_width)*inv_zoom;
+        top_x = main_toolbar_left + main_toolbar_width + separator_width / 2;
+        top_x = top_x * inv_cnv_w * 2;
     }
-    float zoomed_top_y = 0.5f * cnv_h * inv_zoom;
-#else
-    //float zoomed_top_x = (-0.5f * cnv_w) * inv_zoom;
-    //float zoomed_top_y = (0.5f * height) * inv_zoom;
-    float zoomed_top_x = (0.5f * cnv_w - width) * inv_zoom;
-    float main_toolbar_height = (float)m_parent.get_main_toolbar_height();
-    float assemble_view_height = (float)m_parent.get_assemble_view_toolbar_height();
-    //float space_height = GLGizmosManager::Default_Icons_Size * wxGetApp().toolbar_icon_scale();
-    float zoomed_top_y = 0.5f * (height + assemble_view_height - main_toolbar_height) * inv_zoom;
-#endif
-    //BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": zoomed_top_y %1%, space_height %2%, main_toolbar_height %3% zoomed_top_x %4%") % zoomed_top_y % space_height % main_toolbar_height % zoomed_top_x;
+    float top_y = 1.0f;
 
-    float zoomed_left = zoomed_top_x;
-    float zoomed_top = zoomed_top_y;
-    float zoomed_right = zoomed_left + width * inv_zoom;
-    float zoomed_bottom = zoomed_top - height * inv_zoom;
+    render_background(top_x, top_y, top_x + width, top_y - height, border_w, border_h);
 
-    render_background(zoomed_left, zoomed_top, zoomed_right, zoomed_bottom, zoomed_border);
+    top_x += border_w;
+    top_y -= border_h;
 
-    zoomed_top_x += zoomed_border;
-    zoomed_top_y -= zoomed_border;
-
-    float icons_size = m_layout.scaled_icons_size();
-    float zoomed_icons_size = icons_size * inv_zoom;
-    float zoomed_stride_y = m_layout.scaled_stride_y() * inv_zoom;
+    const float icons_size_x = 2.0f * m_layout.scaled_icons_size() * inv_cnv_w;
+    const float icons_size_y = 2.0f * m_layout.scaled_icons_size() * inv_cnv_h;
     //BBS: GUI refactor: GLToolbar&&Gizmo adjust
-    float zoomed_stride_x = m_layout.scaled_stride_x() * inv_zoom;
+    const float stride_x = 2.0f * m_layout.scaled_stride_x() * inv_cnv_w;
 
-    unsigned int icons_texture_id = m_icons_texture.get_id();
-    int tex_width = m_icons_texture.get_width();
-    int tex_height = m_icons_texture.get_height();
+    const unsigned int icons_texture_id = m_icons_texture.get_id();
+    const int tex_width = m_icons_texture.get_width();
+    const int tex_height = m_icons_texture.get_height();
 
-    if ((icons_texture_id == 0) || (tex_width <= 1) || (tex_height <= 1))
+    if (icons_texture_id == 0 || tex_width <= 1 || tex_height <= 1)
         return;
 
-    float du = (float)(tex_width - 1) / (6.0f * (float)tex_width); // 6 is the number of possible states if the icons
-    float dv = (float)(tex_height - 1) / (float)(m_gizmos.size() * tex_height);
+    const float du = (float)(tex_width - 1) / (6.0f * (float)tex_width); // 6 is the number of possible states if the icons
+    const float dv = (float)(tex_height - 1) / (float)(m_gizmos.size() * tex_height);
 
     // tiles in the texture are spaced by 1 pixel
-    float u_offset = 1.0f / (float)tex_width;
-    float v_offset = 1.0f / (float)tex_height;
+    const float u_offset = 1.0f / (float)tex_width;
+    const float v_offset = 1.0f / (float)tex_height;
 
     bool is_render_current = false;
 
-    for (size_t idx : selectable_idxs)
-    {
+    for (size_t idx : selectable_idxs) {
         GLGizmoBase* gizmo = m_gizmos[idx].get();
-        unsigned int sprite_id = gizmo->get_sprite_id();
+        const unsigned int sprite_id = gizmo->get_sprite_id();
         // higlighted state needs to be decided first so its highlighting in every other state
-        int icon_idx = (m_highlight.first == idx ? (m_highlight.second ? 4 : 5) : (m_current == idx) ? 2 : ((m_hover == idx) ? 1 : (gizmo->is_activable()? 0 : 3)));
+        const int icon_idx = (m_highlight.first == idx ? (m_highlight.second ? 4 : 5) : (m_current == idx) ? 2 : ((m_hover == idx) ? 1 : (gizmo->is_activable()? 0 : 3)));
 
-        float v_top = v_offset + sprite_id * dv;
-        float u_left = u_offset + icon_idx * du;
-        float v_bottom = v_top + dv - v_offset;
-        float u_right = u_left + du - u_offset;
-
-        GLTexture::render_sub_texture(icons_texture_id, zoomed_top_x, zoomed_top_x + zoomed_icons_size, zoomed_top_y - zoomed_icons_size, zoomed_top_y, { { u_left, v_bottom }, { u_right, v_bottom }, { u_right, v_top }, { u_left, v_top } });
+        const float u_left   = u_offset + icon_idx * du;
+        const float u_right  = u_left + du - u_offset;
+        const float v_top    = v_offset + sprite_id * dv;
+        const float v_bottom = v_top + dv - v_offset;
 
+        GLTexture::render_sub_texture(icons_texture_id, top_x, top_x + icons_size_x, top_y - icons_size_y, top_y, { { u_left, v_bottom }, { u_right, v_bottom }, { u_right, v_top }, { u_left, v_top } });
         if (idx == m_current) {
             //BBS: GUI refactor: GLToolbar&&Gizmo adjust
             //render_input_window uses a different coordination(imgui)
             //1. no need to scale by camera zoom, set {0,0} at left-up corner for imgui
-#if BBS_TOOLBAR_ON_TOP
             //gizmo->render_input_window(width, 0.5f * cnv_h - zoomed_top_y * zoom, toolbar_top);
-            gizmo->render_input_window(0.5 * cnv_w + zoomed_top_x * zoom, height, cnv_h);
+            gizmo->render_input_window(0.5 * cnv_w + 0.5f * top_x * cnv_w, get_scaled_total_height(), cnv_h);
 
             is_render_current = true;
-#else
-            float toolbar_top = cnv_h - wxGetApp().plater()->get_view_toolbar().get_height();
-            //gizmo->render_input_window(width, 0.5f * cnv_h - zoomed_top_y * zoom, toolbar_top);
-            gizmo->render_input_window(cnv_w - width, 0.5f * cnv_h - zoomed_top_y * zoom, toolbar_top);
-#endif
         }
-#if BBS_TOOLBAR_ON_TOP
-        zoomed_top_x += zoomed_stride_x;
-#else
-        zoomed_top_y -= zoomed_stride_y;
-#endif
+        top_x += stride_x;
     }
 
     // BBS simplify gizmo is not a selected gizmo and need to render input window
     if (!is_render_current && m_current != Undefined) {
-        m_gizmos[m_current]->render_input_window(0.5 * cnv_w + zoomed_top_x * zoom, height, cnv_h);
+        m_gizmos[m_current]->render_input_window(0.5 * cnv_w + 0.5f * top_x * cnv_w, get_scaled_total_height(), cnv_h);
     }
 }
 
@@ -1542,14 +1523,12 @@ GLGizmosManager::EType GLGizmosManager::get_gizmo_from_name(const std::string& g
     return GLGizmosManager::EType::Undefined;
 }
 
-bool GLGizmosManager::generate_icons_texture() const
+bool GLGizmosManager::generate_icons_texture()
 {
     std::string path = resources_dir() + "/images/";
     std::vector<std::string> filenames;
-    for (size_t idx=0; idx<m_gizmos.size(); ++idx)
-    {
-        if (m_gizmos[idx] != nullptr)
-        {
+    for (size_t idx = 0; idx<m_gizmos.size(); ++idx) {
+        if (m_gizmos[idx] != nullptr) {
             const std::string& icon_filename = m_gizmos[idx]->get_icon_filename();
             if (!icon_filename.empty())
                 filenames.push_back(path + icon_filename);

src/slic3r/GUI/Gizmos/GLGizmosManager.hpp

@@ -325,11 +325,11 @@ public:
     bool get_uniform_scaling() const { return m_object_manipulation.get_uniform_scaling();}
 
 private:
-    void render_background(float left, float top, float right, float bottom, float border) const;
+    void render_background(float left, float top, float right, float bottom, float border_w, float border_h) const;
     
     void do_render_overlay() const;
 
-    bool generate_icons_texture() const;
+    bool generate_icons_texture();
 
     void update_on_off_state(const Vec2d& mouse_pos);
     std::string update_hover_state(const Vec2d& mouse_pos);

src/slic3r/GUI/MeshUtils.cpp

@@ -8,6 +8,7 @@
 
 #include "slic3r/GUI/GUI_App.hpp"
 #include "slic3r/GUI/Camera.hpp"
+#include "slic3r/GUI/Plater.hpp"
 
 #include <GL/glew.h>
 
@@ -73,13 +74,19 @@ void MeshClipper::render_cut(const ColorRGBA& color)
     if (! m_triangles_valid)
         recalculate_triangles();
 
+    if (m_model.vertices_count() == 0 || m_model.indices_count() == 0)
+        return;
+
     GLShaderProgram* curr_shader = wxGetApp().get_current_shader();
     if (curr_shader != nullptr)
         curr_shader->stop_using();
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
+        const Camera& camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
         m_model.set_color(color);
         m_model.render();
         shader->stop_using();
@@ -205,7 +212,7 @@ void MeshClipper::recalculate_triangles()
     m_model.reset();
 
     GLModel::Geometry init_data;
-    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3, GLModel::Geometry::index_type(m_triangles2d.size()) };
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3N3 };
     init_data.reserve_vertices(m_triangles2d.size());
     init_data.reserve_indices(m_triangles2d.size());
 
@@ -215,10 +222,7 @@ void MeshClipper::recalculate_triangles()
         init_data.add_vertex((Vec3f)(tr * Vec3d((*(it + 1)).x(), (*(it + 1)).y(), height_mesh)).cast<float>(), (Vec3f)up.cast<float>());
         init_data.add_vertex((Vec3f)(tr * Vec3d((*(it + 2)).x(), (*(it + 2)).y(), height_mesh)).cast<float>(), (Vec3f)up.cast<float>());
         const size_t idx = it - m_triangles2d.cbegin();
-        if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-            init_data.add_ushort_triangle((unsigned short)idx, (unsigned short)idx + 1, (unsigned short)idx + 2);
-        else
-            init_data.add_uint_triangle((unsigned int)idx, (unsigned int)idx + 1, (unsigned int)idx + 2);
+        init_data.add_triangle((unsigned int)idx, (unsigned int)idx + 1, (unsigned int)idx + 2);
     }
 
     if (!init_data.is_empty())

src/slic3r/GUI/PartPlate.cpp

@@ -351,7 +351,7 @@ static bool init_model_from_lines(GLModel &model, const Lines &lines, float z)
 {
 
     GLModel::Geometry init_data;
-    init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::index_type(2 * lines.size()) };
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
     init_data.reserve_vertices(2 * lines.size());
     init_data.reserve_indices(2 * lines.size());
 
@@ -359,10 +359,7 @@ static bool init_model_from_lines(GLModel &model, const Lines &lines, float z)
         init_data.add_vertex(Vec3f(unscale<float>(l.a.x()), unscale<float>(l.a.y()), z));
         init_data.add_vertex(Vec3f(unscale<float>(l.b.x()), unscale<float>(l.b.y()), z));
         const unsigned int vertices_counter = (unsigned int)init_data.vertices_count();
-        if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-            init_data.add_ushort_line((unsigned short)vertices_counter - 2, (unsigned short)vertices_counter - 1);
-        else
-            init_data.add_uint_line(vertices_counter - 2, vertices_counter - 1);
+        init_data.add_line(vertices_counter - 2, vertices_counter - 1);
     }
 
     model.init_from(std::move(init_data));
@@ -374,7 +371,7 @@ static bool init_model_from_lines(GLModel &model, const Lines3 &lines)
 {
 
     GLModel::Geometry init_data;
-    init_data.format = {GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::index_type(2 * lines.size())};
+    init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
     init_data.reserve_vertices(2 * lines.size());
     init_data.reserve_indices(2 * lines.size());
 
@@ -382,10 +379,7 @@ static bool init_model_from_lines(GLModel &model, const Lines3 &lines)
         init_data.add_vertex(Vec3f(unscale<float>(l.a.x()), unscale<float>(l.a.y()), unscale<float>(l.a.z())));
         init_data.add_vertex(Vec3f(unscale<float>(l.b.x()), unscale<float>(l.b.y()), unscale<float>(l.b.z())));
         const unsigned int vertices_counter = (unsigned int) init_data.vertices_count();
-        if (init_data.format.index_type == GLModel::Geometry::EIndexType::USHORT)
-            init_data.add_ushort_line((unsigned short) vertices_counter - 2, (unsigned short) vertices_counter - 1);
-        else
-            init_data.add_uint_line(vertices_counter - 2, vertices_counter - 1);
+        init_data.add_line(vertices_counter - 2, vertices_counter - 1);
     }
 
     model.init_from(std::move(init_data));
@@ -583,9 +577,12 @@ void PartPlate::render_logo_texture(GLTexture &logo_texture, GLModel& logo_buffe
 	}
 
 	if (logo_buffer.is_initialized()) {
-		GLShaderProgram* shader = wxGetApp().get_shader("printbed");
+		GLShaderProgram* shader = wxGetApp().get_shader("printbed_attr");
 		if (shader != nullptr) {
 			shader->start_using();
+            const Camera &camera = wxGetApp().plater()->get_camera();
+            shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+            shader->set_uniform("projection_matrix", camera.get_projection_matrix());
 			shader->set_uniform("transparent_background", 0);
 			shader->set_uniform("svg_source", 0);
 
@@ -852,9 +849,12 @@ void PartPlate::show_tooltip(const std::string tooltip)
 
 void PartPlate::render_icons(bool bottom, bool only_name, int hover_id)
 {
-	GLShaderProgram* shader = wxGetApp().get_shader("printbed");
+	GLShaderProgram* shader = wxGetApp().get_shader("printbed_attr");
 	if (shader != nullptr) {
 		shader->start_using();
+        const Camera &camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
 		shader->set_uniform("transparent_background", bottom);
 		//shader->set_uniform("svg_source", boost::algorithm::iends_with(m_partplate_list->m_del_texture.get_source(), ".svg"));
 		shader->set_uniform("svg_source", 0);
@@ -940,9 +940,12 @@ void PartPlate::render_icons(bool bottom, bool only_name, int hover_id)
 
 void PartPlate::render_only_numbers(bool bottom)
 {
-	GLShaderProgram* shader = wxGetApp().get_shader("printbed");
+	GLShaderProgram* shader = wxGetApp().get_shader("printbed_attr");
 	if (shader != nullptr) {
 		shader->start_using();
+        const Camera &camera = wxGetApp().plater()->get_camera();
+        shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+        shader->set_uniform("projection_matrix", camera.get_projection_matrix());
 		shader->set_uniform("transparent_background", bottom);
 		//shader->set_uniform("svg_source", boost::algorithm::iends_with(m_partplate_list->m_del_texture.get_source(), ".svg"));
 		shader->set_uniform("svg_source", 0);
@@ -968,14 +971,17 @@ void PartPlate::render_only_numbers(bool bottom)
     }
 }
 
-void PartPlate::render_rectangle_for_picking(GLModel &buffer, const ColorRGBA render_color)
+void PartPlate::render_rectangle_for_picking(const Transform3d &view_matrix, const Transform3d &projection_matrix, GLModel &buffer, const ColorRGBA render_color)
 {
     glsafe(::glDisable(GL_DEPTH_TEST));
 
-    GLShaderProgram *shader = wxGetApp().get_shader("flat");
+    GLShaderProgram *shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
         shader->start_using();
 
+        shader->set_uniform("view_model_matrix", view_matrix);
+        shader->set_uniform("projection_matrix", projection_matrix);
+
 	    //glsafe(::glDepthMask(GL_FALSE));
 		buffer.set_color(render_color);
         buffer.render();
@@ -1203,36 +1209,36 @@ void PartPlate::render_right_arrow(const ColorRGBA render_color, bool use_lighti
 }
 */
 
-void PartPlate::on_render_for_picking() {
+void PartPlate::on_render_for_picking(const Transform3d &view_matrix, const Transform3d &projection_matrix) {
 	//glsafe(::glDisable(GL_DEPTH_TEST));
 	int hover_id = 0;
 	ColorRGBA color	= picking_color_component(hover_id);
     m_grabber_color = color;
 	//render_grabber(m_grabber_color, false);
-	render_rectangle_for_picking(m_triangles, m_grabber_color);
+    render_rectangle_for_picking(view_matrix, projection_matrix, m_triangles, m_grabber_color);
 	hover_id = 1;
     color           = picking_color_component(hover_id);
     m_grabber_color = color;
 	//render_left_arrow(m_grabber_color, false);
-	render_rectangle_for_picking(m_del_icon, m_grabber_color);
+    render_rectangle_for_picking(view_matrix, projection_matrix, m_del_icon, m_grabber_color);
 	hover_id = 2;
     color           = picking_color_component(hover_id);
     m_grabber_color = color;
-	render_rectangle_for_picking(m_orient_icon, m_grabber_color);
+    render_rectangle_for_picking(view_matrix, projection_matrix, m_orient_icon, m_grabber_color);
     hover_id = 3;
     color           = picking_color_component(hover_id);
     m_grabber_color = color;
-	render_rectangle_for_picking(m_arrange_icon, m_grabber_color);
+    render_rectangle_for_picking(view_matrix, projection_matrix, m_arrange_icon, m_grabber_color);
 	hover_id = 4;
     color           = picking_color_component(hover_id);
     m_grabber_color = color;
 	//render_right_arrow(m_grabber_color, false);
-	render_rectangle_for_picking(m_lock_icon, m_grabber_color);
+    render_rectangle_for_picking(view_matrix, projection_matrix, m_lock_icon, m_grabber_color);
 	hover_id = 5;
     color           = picking_color_component(hover_id);
     m_grabber_color = color;
     if (m_partplate_list->render_plate_settings)
-        render_rectangle_for_picking(m_plate_settings_icon, m_grabber_color);
+        render_rectangle_for_picking(view_matrix, projection_matrix, m_plate_settings_icon, m_grabber_color);
 }
 
 ColorRGBA PartPlate::picking_color_component(int idx) const
@@ -2494,7 +2500,7 @@ bool PartPlate::intersects(const BoundingBoxf3& bb) const
 	return print_volume.intersects(bb);
 }
 
-void PartPlate::render(bool bottom, bool only_body, bool force_background_color, HeightLimitMode mode, int hover_id, bool render_cali)
+void PartPlate::render(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool only_body, bool force_background_color, HeightLimitMode mode, int hover_id, bool render_cali)
 {
     GLShaderProgram *shader = wxGetApp().get_shader("flat_attr");
     if (shader != nullptr) {
@@ -2503,8 +2509,8 @@ void PartPlate::render(bool bottom, bool only_body, bool force_background_color,
         glsafe(::glEnable(GL_BLEND));
         glsafe(::glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA));
 
-        const Transform3d matrix = wxGetApp().plater()->get_camera().get_projection_view_matrix();
-        shader->set_uniform("projection_view_model_matrix", matrix);
+        shader->set_uniform("view_model_matrix", view_matrix);
+        shader->set_uniform("projection_matrix", projection_matrix);
 
         if (!bottom) {
             // draw background
@@ -4352,7 +4358,7 @@ void PartPlateList::postprocess_arrange_polygon(arrangement::ArrangePolygon& arr
 
 /*rendering related functions*/
 //render
-void PartPlateList::render(bool bottom, bool only_current, bool only_body, int hover_id, bool render_cali)
+void PartPlateList::render(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool only_current, bool only_body, int hover_id, bool render_cali)
 {
 	const std::lock_guard<std::mutex> local_lock(m_plates_mutex);
 	std::vector<PartPlate*>::iterator it = m_plate_list.begin();
@@ -4377,25 +4383,25 @@ void PartPlateList::render(bool bottom, bool only_current, bool only_body, int h
 		if (current_index == m_current_plate) {
 			PartPlate::HeightLimitMode height_mode = (only_current)?PartPlate::HEIGHT_LIMIT_NONE:m_height_limit_mode;
 			if (plate_hover_index == current_index)
-				(*it)->render(bottom, only_body, false, height_mode, plate_hover_action, render_cali);
+                (*it)->render(view_matrix, projection_matrix, bottom, only_body, false, height_mode, plate_hover_action, render_cali);
 			else
-				(*it)->render(bottom, only_body, false, height_mode, -1, render_cali);
+                (*it)->render(view_matrix, projection_matrix, bottom, only_body, false, height_mode, -1, render_cali);
 		}
 		else {
 			if (plate_hover_index == current_index)
-				(*it)->render(bottom, only_body, false, PartPlate::HEIGHT_LIMIT_NONE, plate_hover_action, render_cali);
+				(*it)->render(view_matrix, projection_matrix, bottom, only_body, false, PartPlate::HEIGHT_LIMIT_NONE, plate_hover_action, render_cali);
 			else
-				(*it)->render(bottom, only_body, false, PartPlate::HEIGHT_LIMIT_NONE, -1, render_cali);
+                (*it)->render(view_matrix, projection_matrix, bottom, only_body, false, PartPlate::HEIGHT_LIMIT_NONE, -1, render_cali);
 		}
 	}
 }
 
-void PartPlateList::render_for_picking_pass()
+void PartPlateList::render_for_picking_pass(const Transform3d &view_matrix, const Transform3d &projection_matrix)
 {
 	const std::lock_guard<std::mutex> local_lock(m_plates_mutex);
 	std::vector<PartPlate*>::iterator it = m_plate_list.begin();
 	for (it = m_plate_list.begin(); it != m_plate_list.end(); it++) {
-		(*it)->render_for_picking();
+        (*it)->render_for_picking(view_matrix, projection_matrix);
 	}
 }
 

src/slic3r/GUI/PartPlate.hpp

@@ -181,8 +181,8 @@ private:
     void render_icons(bool bottom, bool only_name = false, int hover_id = -1);
     void render_only_numbers(bool bottom);
     void render_plate_name_texture();
-    void render_rectangle_for_picking(GLModel &buffer, const ColorRGBA render_color);
-    void on_render_for_picking();
+    void render_rectangle_for_picking(const Transform3d &view_matrix, const Transform3d &projection_matrix, GLModel &buffer, const ColorRGBA render_color);
+    void on_render_for_picking(const Transform3d &view_matrix, const Transform3d &projection_matrix);
     ColorRGBA picking_color_component(int idx) const;
 
 public:
@@ -341,8 +341,8 @@ public:
     bool contains(const BoundingBoxf3& bb) const;
     bool intersects(const BoundingBoxf3& bb) const;
 
-    void render(bool bottom, bool only_body = false, bool force_background_color = false, HeightLimitMode mode = HEIGHT_LIMIT_NONE, int hover_id = -1, bool render_cali = false);
-    void render_for_picking() { on_render_for_picking(); }
+    void render(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool only_body = false, bool force_background_color = false, HeightLimitMode mode = HEIGHT_LIMIT_NONE, int hover_id = -1, bool render_cali = false);
+    void render_for_picking(const Transform3d &view_matrix, const Transform3d &projection_matrix) { on_render_for_picking(view_matrix, projection_matrix); }
     void set_selected();
     void set_unselected();
     void set_hover_id(int id) { m_hover_id = id; }
@@ -740,8 +740,8 @@ public:
 
     /*rendering related functions*/
     void on_change_color_mode(bool is_dark) { m_is_dark = is_dark; }
-    void render(bool bottom,    bool only_current = false, bool only_body = false, int hover_id = -1, bool render_cali = false);
-    void render_for_picking_pass();
+    void render(const Transform3d& view_matrix, const Transform3d& projection_matrix, bool bottom, bool only_current = false, bool only_body = false, int hover_id = -1, bool render_cali = false);
+    void render_for_picking_pass(const Transform3d& view_matrix, const Transform3d& projection_matrix);
     void set_render_option(bool bedtype_texture, bool plate_settings);
     void set_render_cali(bool value = true) { render_cali_logo = value; }
     BoundingBoxf3& get_bounding_box() { return m_bounding_box; }

src/slic3r/GUI/Selection.cpp

@@ -1570,22 +1570,26 @@ void Selection::render_center(bool gizmo_is_dragging)
     if (!m_valid || is_empty())
         return;
 
-    const Vec3d center = gizmo_is_dragging ? m_cache.dragging_center : get_bounding_box().center();
-
-    glsafe(::glDisable(GL_DEPTH_TEST));
-
-    glsafe(::glPushMatrix());
-    glsafe(::glTranslated(center.x(), center.y(), center.z()));
-	
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader == nullptr)
         return;
 
     shader->start_using();
-    m_vbo_sphere.set_color(-1, ColorRGBA::WHITE());
+
+    const Vec3d center = gizmo_is_dragging ? m_cache.dragging_center : get_bounding_box().center();
+
+    glsafe(::glDisable(GL_DEPTH_TEST));
+
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    Transform3d view_model_matrix = camera.get_view_matrix() * Geometry::assemble_transform(center);
+
+    shader->set_uniform("view_model_matrix", view_model_matrix);
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
+	
+    m_vbo_sphere.set_color(ColorRGBA::WHITE());
     m_vbo_sphere.render();
+
     shader->stop_using();
-    glsafe(::glPopMatrix());
 }
 #endif // ENABLE_RENDER_SELECTION_CENTER
 
@@ -1596,7 +1600,7 @@ void Selection::render_sidebar_hints(const std::string& sidebar_field, bool unif
     if (sidebar_field.empty())
         return;
 
-    GLShaderProgram* shader = wxGetApp().get_shader(boost::starts_with(sidebar_field, "layer") ? "flat" : "gouraud_light");
+    GLShaderProgram* shader = wxGetApp().get_shader(boost::starts_with(sidebar_field, "layer") ? "flat_attr" : "gouraud_light_attr");
     if (shader == nullptr)
         return;
 
@@ -1604,16 +1608,14 @@ void Selection::render_sidebar_hints(const std::string& sidebar_field, bool unif
 
     glsafe(::glEnable(GL_DEPTH_TEST));
 
-    glsafe(::glPushMatrix());
+    const Transform3d base_matrix = Geometry::assemble_transform(get_bounding_box().center());
+    Transform3d orient_matrix = Transform3d::Identity();
 
     if (!boost::starts_with(sidebar_field, "layer")) {
-        const Vec3d& center = get_bounding_box().center();
-
+        shader->set_uniform("emission_factor", 0.05f);
         // BBS
         if (is_single_full_instance()/* && !wxGetApp().obj_manipul()->get_world_coordinates()*/) {
-            glsafe(::glTranslated(center.x(), center.y(), center.z()));
             if (!boost::starts_with(sidebar_field, "position")) {
-                Transform3d orient_matrix = Transform3d::Identity();
                 if (boost::starts_with(sidebar_field, "scale"))
                     orient_matrix = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_matrix(true, false, true, true);
                 else if (boost::starts_with(sidebar_field, "rotation")) {
@@ -1621,51 +1623,45 @@ void Selection::render_sidebar_hints(const std::string& sidebar_field, bool unif
                         orient_matrix = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_matrix(true, false, true, true);
                     else if (boost::ends_with(sidebar_field, "y")) {
                         const Vec3d& rotation = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_rotation();
-                        if (rotation(0) == 0.0)
+                        if (rotation.x() == 0.0)
                             orient_matrix = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_matrix(true, false, true, true);
                         else
-                            orient_matrix.rotate(Eigen::AngleAxisd(rotation(2), Vec3d::UnitZ()));
+                            orient_matrix.rotate(Eigen::AngleAxisd(rotation.z(), Vec3d::UnitZ()));
                     }
                 }
-
-                glsafe(::glMultMatrixd(orient_matrix.data()));
             }
-        } else if (is_single_volume() || is_single_modifier()) {
-            glsafe(::glTranslated(center.x(), center.y(), center.z()));
-            Transform3d orient_matrix = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_matrix(true, false, true, true);
+        }
+        else if (is_single_volume() || is_single_modifier()) {
+            orient_matrix = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_matrix(true, false, true, true);
             if (!boost::starts_with(sidebar_field, "position"))
                 orient_matrix = orient_matrix * (*m_volumes)[*m_list.begin()]->get_volume_transformation().get_matrix(true, false, true, true);
 
-            glsafe(::glMultMatrixd(orient_matrix.data()));
-        } else {
-            glsafe(::glTranslated(center(0), center(1), center(2)));
-            if (requires_local_axes()) {
-                const Transform3d orient_matrix = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_matrix(true, false, true, true);
-                glsafe(::glMultMatrixd(orient_matrix.data()));
         }
+        else {
+            if (requires_local_axes())
+                orient_matrix = (*m_volumes)[*m_list.begin()]->get_instance_transformation().get_matrix(true, false, true, true);
         }
     }
 
     if (!boost::starts_with(sidebar_field, "layer"))
         glsafe(::glClear(GL_DEPTH_BUFFER_BIT));
     if (boost::starts_with(sidebar_field, "position"))
-        render_sidebar_position_hints(sidebar_field);
+        render_sidebar_position_hints(sidebar_field, *shader, base_matrix * orient_matrix);
     else if (boost::starts_with(sidebar_field, "rotation"))
-        render_sidebar_rotation_hints(sidebar_field);
+        render_sidebar_rotation_hints(sidebar_field, *shader, base_matrix * orient_matrix);
     else if (boost::starts_with(sidebar_field, "scale") || boost::starts_with(sidebar_field, "size"))
         //BBS: GUI refactor: add uniform_scale from gizmo
-        render_sidebar_scale_hints(sidebar_field, uniform_scale);
+        render_sidebar_scale_hints(sidebar_field, uniform_scale, *shader, base_matrix * orient_matrix);
     else if (boost::starts_with(sidebar_field, "layer"))
-        render_sidebar_layers_hints(sidebar_field);
+        render_sidebar_layers_hints(sidebar_field, *shader);
 
-    glsafe(::glPopMatrix());
 
     shader->stop_using();
 }
 
 bool Selection::requires_local_axes() const
 {
-    return (m_mode == Volume) && is_from_single_instance();
+    return m_mode == Volume && is_from_single_instance();
 }
 
 void Selection::cut_to_clipboard()
@@ -1681,8 +1677,7 @@ void Selection::copy_to_clipboard()
 
     m_clipboard.reset();
 
-    for (const ObjectIdxsToInstanceIdxsMap::value_type& object : m_cache.content)
-    {
+    for (const ObjectIdxsToInstanceIdxsMap::value_type& object : m_cache.content) {
         ModelObject* src_object = m_model->objects[object.first];
         ModelObject* dst_object = m_clipboard.add_object();
         dst_object->name                 = src_object->name;
@@ -1695,26 +1690,22 @@ void Selection::copy_to_clipboard()
         dst_object->layer_height_profile.assign(src_object->layer_height_profile);
         dst_object->origin_translation   = src_object->origin_translation;
 
-        for (int i : object.second)
-        {
+        for (int i : object.second) {
             dst_object->add_instance(*src_object->instances[i]);
         }
 
-        for (unsigned int i : m_list)
-        {
+        for (unsigned int i : m_list) {
             // Copy the ModelVolumes only for the selected GLVolumes of the 1st selected instance.
             const GLVolume* volume = (*m_volumes)[i];
-            if ((volume->object_idx() == object.first) && (volume->instance_idx() == *object.second.begin()))
-            {
+            if (volume->object_idx() == object.first && volume->instance_idx() == *object.second.begin()) {
                 int volume_idx = volume->volume_idx();
-                if ((0 <= volume_idx) && (volume_idx < (int)src_object->volumes.size()))
-                {
+                if (0 <= volume_idx && volume_idx < (int)src_object->volumes.size()) {
                     ModelVolume* src_volume = src_object->volumes[volume_idx];
                     ModelVolume* dst_volume = dst_object->add_volume(*src_volume);
                     dst_volume->set_new_unique_id();
-                } else {
-                    assert(false);
                 }
+                else
+                    assert(false);
             }
         }
     }
@@ -2167,7 +2158,7 @@ void Selection::render_bounding_box(const BoundingBoxf3& box, const ColorRGB& co
         const Vec3f size = 0.2f * box.size().cast<float>();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Lines, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(48);
         init_data.reserve_indices(48);
 
@@ -2230,7 +2221,7 @@ void Selection::render_bounding_box(const BoundingBoxf3& box, const ColorRGB& co
 
         // indices
         for (unsigned short i = 0; i < 48; ++i) {
-            init_data.add_ushort_index(i);
+            init_data.add_index(i);
         }
 
         m_box.init_from(std::move(init_data));
@@ -2240,11 +2231,14 @@ void Selection::render_bounding_box(const BoundingBoxf3& box, const ColorRGB& co
 
     glsafe(::glLineWidth(2.0f * m_scale_factor));
 
-    GLShaderProgram* shader = wxGetApp().get_shader("flat");
+    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
     if (shader == nullptr)
         return;
 
     shader->start_using();
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    shader->set_uniform("view_model_matrix", camera.get_view_matrix());
+    shader->set_uniform("projection_matrix", camera.get_projection_matrix());
     m_box.set_color(to_rgba(color));
     m_box.render();
     shader->stop_using();
@@ -2255,91 +2249,103 @@ static ColorRGBA get_color(Axis axis)
     return GLGizmoBase::AXES_COLOR[axis];
 }
 
-void Selection::render_sidebar_position_hints(const std::string& sidebar_field)
+void Selection::render_sidebar_position_hints(const std::string& sidebar_field, GLShaderProgram& shader, const Transform3d& matrix)
 {
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d view_matrix = camera.get_view_matrix() * matrix;
+    shader.set_uniform("projection_matrix", camera.get_projection_matrix());
+
     if (boost::ends_with(sidebar_field, "x")) {
-        glsafe(::glRotated(-90.0, 0.0, 0.0, 1.0));
+        const Transform3d view_model_matrix = view_matrix * Geometry::assemble_transform(Vec3d::Zero(), -0.5 * PI * Vec3d::UnitZ());
+        shader.set_uniform("view_model_matrix", view_model_matrix);
+        shader.set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_arrow.set_color(get_color(X));
         m_arrow.render();
     }
     else if (boost::ends_with(sidebar_field, "y")) {
+        shader.set_uniform("view_model_matrix", view_matrix);
+        shader.set_uniform("normal_matrix", (Matrix3d)view_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_arrow.set_color(get_color(Y));
         m_arrow.render();
     }
     else if (boost::ends_with(sidebar_field, "z")) {
-        glsafe(::glRotated(90.0, 1.0, 0.0, 0.0));
+        const Transform3d view_model_matrix = view_matrix * Geometry::assemble_transform(Vec3d::Zero(), 0.5 * PI * Vec3d::UnitX());
+        shader.set_uniform("view_model_matrix", view_model_matrix);
+        shader.set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_arrow.set_color(get_color(Z));
         m_arrow.render();
     }
 }
 
-void Selection::render_sidebar_rotation_hints(const std::string& sidebar_field)
+void Selection::render_sidebar_rotation_hints(const std::string& sidebar_field, GLShaderProgram& shader, const Transform3d& matrix)
 {
-    auto render_sidebar_rotation_hint = [this]() {
+    auto render_sidebar_rotation_hint = [this](GLShaderProgram& shader, const Transform3d& matrix) {
+        Transform3d view_model_matrix = matrix;
+        shader.set_uniform("view_model_matrix", view_model_matrix);
+        shader.set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_curved_arrow.render();
-        glsafe(::glRotated(180.0, 0.0, 0.0, 1.0));
+        view_model_matrix = matrix * Geometry::assemble_transform(Vec3d::Zero(), PI * Vec3d::UnitZ());
+        shader.set_uniform("view_model_matrix", view_model_matrix);
+        shader.set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_curved_arrow.render();
     };
 
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d view_matrix = camera.get_view_matrix() * matrix;
+    shader.set_uniform("projection_matrix", camera.get_projection_matrix());
+
     if (boost::ends_with(sidebar_field, "x")) {
-        glsafe(::glRotated(90.0, 0.0, 1.0, 0.0));
         m_curved_arrow.set_color(get_color(X));
-        render_sidebar_rotation_hint();
+        render_sidebar_rotation_hint(shader, view_matrix * Geometry::assemble_transform(Vec3d::Zero(), 0.5 * PI * Vec3d::UnitY()));
     }
     else if (boost::ends_with(sidebar_field, "y")) {
-        glsafe(::glRotated(-90.0, 1.0, 0.0, 0.0));
         m_curved_arrow.set_color(get_color(Y));
-        render_sidebar_rotation_hint();
+        render_sidebar_rotation_hint(shader, view_matrix * Geometry::assemble_transform(Vec3d::Zero(), -0.5 * PI * Vec3d::UnitX()));
     }
     else if (boost::ends_with(sidebar_field, "z")) {
         m_curved_arrow.set_color(get_color(Z));
-        render_sidebar_rotation_hint();
+        render_sidebar_rotation_hint(shader, view_matrix);
     }
 }
 
 //BBS: GUI refactor: add gizmo uniform_scale
-void Selection::render_sidebar_scale_hints(const std::string& sidebar_field, bool gizmo_uniform_scale)
+void Selection::render_sidebar_scale_hints(const std::string& sidebar_field, bool gizmo_uniform_scale, GLShaderProgram& shader, const Transform3d& matrix)
 {
     // BBS
     //bool uniform_scale = requires_uniform_scale() || wxGetApp().obj_manipul()->get_uniform_scaling();
     bool uniform_scale = requires_uniform_scale() || gizmo_uniform_scale;
 
-    auto render_sidebar_scale_hint = [this, uniform_scale](Axis axis) {
+    auto render_sidebar_scale_hint = [this, uniform_scale](Axis axis, GLShaderProgram& shader, const Transform3d& matrix) {
         m_arrow.set_color(uniform_scale ? UNIFORM_SCALE_COLOR : get_color(axis));
-        GLShaderProgram* shader = wxGetApp().get_current_shader();
-        if (shader != nullptr)
-            shader->set_uniform("emission_factor", 0.0f);
-
-        glsafe(::glTranslated(0.0, 5.0, 0.0));
+        Transform3d view_model_matrix = matrix * Geometry::assemble_transform(5.0 * Vec3d::UnitY());
+        shader.set_uniform("view_model_matrix", view_model_matrix);
+        shader.set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_arrow.render();
 
-        glsafe(::glTranslated(0.0, -10.0, 0.0));
-        glsafe(::glRotated(180.0, 0.0, 0.0, 1.0));
+        view_model_matrix = matrix * Geometry::assemble_transform(-5.0 * Vec3d::UnitY(), PI * Vec3d::UnitZ());
+        shader.set_uniform("view_model_matrix", view_model_matrix);
+        shader.set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
         m_arrow.render();
     };
 
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    const Transform3d view_matrix = camera.get_view_matrix() * matrix;
+    shader.set_uniform("projection_matrix", camera.get_projection_matrix());
+
     if (boost::ends_with(sidebar_field, "x") || uniform_scale) {
-        glsafe(::glPushMatrix());
-        glsafe(::glRotated(-90.0, 0.0, 0.0, 1.0));
-        render_sidebar_scale_hint(X);
-        glsafe(::glPopMatrix());
+        render_sidebar_scale_hint(X, shader, view_matrix * Geometry::assemble_transform(Vec3d::Zero(), -0.5 * PI * Vec3d::UnitZ()));
     }
 
     if (boost::ends_with(sidebar_field, "y") || uniform_scale) {
-        glsafe(::glPushMatrix());
-        render_sidebar_scale_hint(Y);
-        glsafe(::glPopMatrix());
+        render_sidebar_scale_hint(Y, shader, view_matrix);
     }
 
     if (boost::ends_with(sidebar_field, "z") || uniform_scale) {
-        glsafe(::glPushMatrix());
-        glsafe(::glRotated(90.0, 1.0, 0.0, 0.0));
-        render_sidebar_scale_hint(Z);
-        glsafe(::glPopMatrix());
+        render_sidebar_scale_hint(Z, shader, view_matrix * Geometry::assemble_transform(Vec3d::Zero(), 0.5 * PI * Vec3d::UnitX()));
     }
 }
 
-void Selection::render_sidebar_layers_hints(const std::string& sidebar_field)
+void Selection::render_sidebar_layers_hints(const std::string& sidebar_field, GLShaderProgram& shader)
 {
     static const float Margin = 10.0f;
 
@@ -2388,7 +2394,7 @@ void Selection::render_sidebar_layers_hints(const std::string& sidebar_field)
         m_planes.models[0].reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(4);
         init_data.reserve_indices(6);
 
@@ -2399,8 +2405,8 @@ void Selection::render_sidebar_layers_hints(const std::string& sidebar_field)
         init_data.add_vertex(Vec3f(p1.x(), p2.y(), z1));
 
         // indices
-        init_data.add_ushort_triangle(0, 1, 2);
-        init_data.add_ushort_triangle(2, 3, 0);
+        init_data.add_triangle(0, 1, 2);
+        init_data.add_triangle(2, 3, 0);
 
         m_planes.models[0].init_from(std::move(init_data));
     }
@@ -2410,7 +2416,7 @@ void Selection::render_sidebar_layers_hints(const std::string& sidebar_field)
         m_planes.models[1].reset();
 
         GLModel::Geometry init_data;
-        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3, GLModel::Geometry::EIndexType::USHORT };
+        init_data.format = { GLModel::Geometry::EPrimitiveType::Triangles, GLModel::Geometry::EVertexLayout::P3 };
         init_data.reserve_vertices(4);
         init_data.reserve_indices(6);
 
@@ -2421,12 +2427,16 @@ void Selection::render_sidebar_layers_hints(const std::string& sidebar_field)
         init_data.add_vertex(Vec3f(p1.x(), p2.y(), z2));
 
         // indices
-        init_data.add_ushort_triangle(0, 1, 2);
-        init_data.add_ushort_triangle(2, 3, 0);
+        init_data.add_triangle(0, 1, 2);
+        init_data.add_triangle(2, 3, 0);
 
         m_planes.models[1].init_from(std::move(init_data));
     }
 
+    const Camera& camera = wxGetApp().plater()->get_camera();
+    shader.set_uniform("view_model_matrix", camera.get_view_matrix());
+    shader.set_uniform("projection_matrix", camera.get_projection_matrix());
+
     m_planes.models[0].set_color((camera_on_top && type == 1) || (!camera_on_top && type == 2) ? SOLID_PLANE_COLOR : TRANSPARENT_PLANE_COLOR);
     m_planes.models[0].render();
     m_planes.models[1].set_color((camera_on_top && type == 2) || (!camera_on_top && type == 1) ? SOLID_PLANE_COLOR : TRANSPARENT_PLANE_COLOR);

src/slic3r/GUI/Selection.hpp

@@ -408,11 +408,11 @@ private:
     void set_bounding_boxes_dirty() { m_bounding_box.reset(); m_unscaled_instance_bounding_box.reset(); m_scaled_instance_bounding_box.reset(); }
     void render_synchronized_volumes();
     void render_bounding_box(const BoundingBoxf3& box, const ColorRGB& color);
-    void render_sidebar_position_hints(const std::string& sidebar_field);
-    void render_sidebar_rotation_hints(const std::string& sidebar_field);
+    void render_sidebar_position_hints(const std::string& sidebar_field, GLShaderProgram& shader, const Transform3d& matrix);
+    void render_sidebar_rotation_hints(const std::string& sidebar_field, GLShaderProgram& shader, const Transform3d& matrix);
     //BBS: GUI refactor: add uniform_scale from gizmo
-    void render_sidebar_scale_hints(const std::string& sidebar_field, bool gizmo_uniform_scale);
-    void render_sidebar_layers_hints(const std::string& sidebar_field);
+    void render_sidebar_scale_hints(const std::string& sidebar_field, bool gizmo_uniform_scale, GLShaderProgram& shader, const Transform3d& matrix);
+    void render_sidebar_layers_hints(const std::string& sidebar_field, GLShaderProgram& shader);
 
 public:
     enum SyncRotationType {

src/slic3r/Utils/CalibUtils.cpp

@@ -917,7 +917,7 @@ void CalibUtils::process_and_store_3mf(Model *model, const DynamicPrintConfig &f
         ThumbnailData* thumbnail_data = &plate_data_list[0]->plate_thumbnail;
         unsigned int thumbnail_width = 512, thumbnail_height = 512;
         const ThumbnailsParams thumbnail_params = {{}, false, true, true, true, 0};
-        GLShaderProgram* shader = wxGetApp().get_shader("thumbnail");
+        GLShaderProgram* shader = wxGetApp().get_shader("thumbnail_attr");
 
         for (unsigned int obj_idx = 0; obj_idx < (unsigned int)model->objects.size(); ++ obj_idx) {
             const ModelObject &model_object = *model->objects[obj_idx];