big tryout

plugins/LayerView/layers.shader

@@ -16,6 +16,8 @@ vertex =
     varying highp vec3 v_vertex;
     varying highp vec3 v_normal;
 
+    varying highp vec3 v_orig_vertex;
+
     void main()
     {
         vec4 world_space_vert = u_modelMatrix * a_vertex;
@@ -27,6 +29,8 @@ vertex =
 
         v_vertex = world_space_vert.xyz;
         v_normal = (u_normalMatrix * normalize(a_normal)).xyz;
+
+        v_orig_vertex = a_vertex.xyz;
     }
 
 geometry =
@@ -38,6 +42,7 @@ geometry =
     in vec4 v_color[];
     in vec3 v_vertex[];
     in vec3 v_normal[];
+    in vec3 v_orig_vertex[];
 
     out vec4 f_color;
     out vec3 f_normal;
@@ -50,6 +55,12 @@ geometry =
         vec3 g_normal;
         vec3 g_offset;
 
+        vec3 g_vertex_delta;
+        vec3 g_vertex_normal;
+
+        float size = 3;
+
+        /*
         delta = vec4(gl_in[1].gl_Position.xy, 0.0, 0.0) - vec4(gl_in[0].gl_Position.xy, 0.0, 0.0);
 
         if (length(delta) > 0.1) {
@@ -59,49 +70,71 @@ geometry =
             g_normal = vec3(delta.y, -delta.x, delta.z);
             g_offset = vec3(0.0, 0.0, 0.0);
         }
-        //g_offset = vec3(3.5, 3.5, 0.0); //5.0 * g_normal;  // vec3(3.5, 3.5, 0.0);
+        g_offset = vec3(3.5, 3.5, 0.0); //5.0 * g_normal;  // vec3(3.5, 3.5, 0.0);
+        */
         //g_normal = normalize(vec3(delta.y, -delta.x, delta.z));
 
-        f_vertex = v_vertex[0];
-        f_normal = v_normal[0];
-        f_color = v_color[0];
-        gl_Position = gl_in[0].gl_Position + g_offset;
-        EmitVertex();
+        g_vertex_delta = v_orig_vertex[1] - v_orig_vertex[0];
+        g_vertex_normal = vec3(g_vertex_delta.z, 0.0, -g_vertex_delta.x);
+        if (length(g_vertex_normal) < 0.1) {
+            g_vertex_normal = vec3(1.0, 0.0, 0.0);
+        } else {
+            g_vertex_normal = normalize(g_vertex_normal);
+        }
 
         f_vertex = v_vertex[0];
-        f_normal = -v_normal[0];
         f_color = v_color[0];
-        gl_Position = gl_in[0].gl_Position - g_offset;
+
+        f_normal = g_vertex_normal;
+        gl_Position = gl_in[0].gl_Position + vec4(0.0, size, 0.0, 0.0);
         EmitVertex();
 
-        f_vertex = v_vertex[1];
-        f_normal = v_normal[1];
-        f_color = v_color[1];
-        gl_Position = gl_in[1].gl_Position + g_offset;
+        f_normal = g_vertex_normal;
+        gl_Position = gl_in[1].gl_Position + vec4(0.0, size, 0.0, 0.0);
+        EmitVertex();
+
+        f_normal = vec3(0.0);
+        gl_Position = gl_in[0].gl_Position + vec4(-size, 0.0, 0.0, 0.0);
+        EmitVertex();
+
+        //f_vertex = v_vertex[1];
+        //f_color = v_color[1];
+
+
+        f_normal = vec3(0.0);
+        gl_Position = gl_in[1].gl_Position + vec4(size, 0.0, 0.0, 0.0);
+        EmitVertex();
+
+        f_normal = -g_vertex_normal;
+        gl_Position = gl_in[0].gl_Position + vec4(0, -size, 0.0, 0.0);
+        EmitVertex();
+
+        f_normal = -g_vertex_normal;
+        gl_Position = gl_in[1].gl_Position + vec4(0.0, -size, 0.0, 0.0);
         EmitVertex();
 
         EndPrimitive();
 
-
+        /*
         f_vertex = v_vertex[0];
-        f_normal = -v_normal[0];
+        f_normal = -g_vertex_normal;
         f_color = v_color[0];
         gl_Position = gl_in[0].gl_Position - g_offset;
         EmitVertex();
 
         f_vertex = v_vertex[1];
-        f_normal = v_normal[0];
+        f_normal = g_vertex_normal;
         f_color = v_color[1];
         gl_Position = gl_in[1].gl_Position + g_offset;
         EmitVertex();
 
         f_vertex = v_vertex[1];
-        f_normal = -v_normal[0];
+        f_normal = -g_vertex_normal;
         f_color = v_color[1];
         gl_Position = gl_in[1].gl_Position - g_offset;
         EmitVertex();
+        */
 
-        EndPrimitive();
 
     }
 
@@ -110,21 +143,38 @@ fragment =
     varying lowp vec3 f_normal;
     varying lowp vec3 f_vertex;
 
+    uniform mediump vec4 u_ambientColor;
     uniform mediump vec4 u_diffuseColor;
     uniform highp vec3 u_lightPosition;
 
+    void Impostor(in float sphereRadius, in vec3 cameraSpherePos, in vec2 mapping, out vec3 cameraPos, out vec3 cameraNormal)
+    {
+        float lensqr = dot(mapping, mapping);
+        if(lensqr > 1.0)
+            discard;
+
+        cameraNormal = vec3(mapping, sqrt(1.0 - lensqr));
+        cameraPos = (cameraNormal * sphereRadius) + cameraSpherePos;
+    }
+
     void main()
     {
+        vec3 cameraPos;
+        vec3 cameraNormal;
+
+        Impostor(0.2, vec3(0.0, 0.0, 0.0), vec2(0.1, 0.0), cameraPos, cameraNormal);
+
         mediump vec4 finalColor = vec4(0.0);
 
-        finalColor += f_color;
+        finalColor += u_ambientColor;
 
-        highp vec3 normal = normalize(f_normal);
+        //highp vec3 normal = normalize(f_normal);
+        highp vec3 normal = normalize(cameraNormal);
         highp vec3 lightDir = normalize(u_lightPosition - f_vertex);
 
         // Diffuse Component
         highp float NdotL = clamp(dot(normal, lightDir), 0.0, 1.0);
-        finalColor += (NdotL * u_diffuseColor);
+        finalColor += (NdotL * f_color);
 
         finalColor.a = 1.0;
         gl_FragColor = finalColor;
@@ -136,6 +186,7 @@ fragment =
 [defaults]
 u_active_extruder = 0.0
 u_shade_factor = 0.60
+u_ambientColor = [0.3, 0.3, 0.3, 0.3]
 u_diffuseColor = [1.0, 0.79, 0.14, 1.0]
 
 [bindings]