From 6cc6e79e65b522000df63ac359c7db730714b455 Mon Sep 17 00:00:00 2001
From: fieldOfView <aldo@fieldofview.com>
Date: Fri, 22 Jul 2016 14:24:52 +0200
Subject: [PATCH] Stripe objects that are outside the build volume

This way they can not be confused with objects that are rendered with a (future) grey materialcolor.
---
 plugins/SolidView/SolidView.py   |  7 +--
 resources/shaders/striped.shader | 84 ++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+), 3 deletions(-)
 create mode 100644 resources/shaders/striped.shader

diff --git a/plugins/SolidView/SolidView.py b/plugins/SolidView/SolidView.py
index 15cf25e65e..96f60fb7cf 100644
--- a/plugins/SolidView/SolidView.py
+++ b/plugins/SolidView/SolidView.py
@@ -34,9 +34,10 @@ class SolidView(View):
             self._enabled_shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "overhang.shader"))
 
         if not self._disabled_shader:
-            self._disabled_shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "overhang.shader"))
-            self._disabled_shader.setUniformValue("u_diffuseColor", [0.68, 0.68, 0.68, 1.0])
-            self._disabled_shader.setUniformValue("u_overhangAngle", math.cos(math.radians(0)))
+            self._disabled_shader = OpenGL.getInstance().createShaderProgram(Resources.getPath(Resources.Shaders, "striped.shader"))
+            self._disabled_shader.setUniformValue("u_diffuseColor1", [1.0, 0.28, 0.28, 1.0])
+            self._disabled_shader.setUniformValue("u_diffuseColor2", [0.68, 0.68, 0.68, 1.0])
+            self._disabled_shader.setUniformValue("u_width", 50.0)
 
         if Application.getInstance().getGlobalContainerStack():
             if Preferences.getInstance().getValue("view/show_overhang"):
diff --git a/resources/shaders/striped.shader b/resources/shaders/striped.shader
new file mode 100644
index 0000000000..0114f0b2cb
--- /dev/null
+++ b/resources/shaders/striped.shader
@@ -0,0 +1,84 @@
+[shaders]
+vertex =
+    uniform highp mat4 u_modelMatrix;
+    uniform highp mat4 u_viewProjectionMatrix;
+    uniform highp mat4 u_normalMatrix;
+
+    attribute highp vec4 a_vertex;
+    attribute highp vec4 a_normal;
+    attribute highp vec2 a_uvs;
+
+    varying highp vec3 v_position;
+    varying highp vec3 v_vertex;
+    varying highp vec3 v_normal;
+
+    void main()
+    {
+        vec4 world_space_vert = u_modelMatrix * a_vertex;
+        gl_Position = u_viewProjectionMatrix * world_space_vert;
+
+        v_position = gl_Position.xyz;
+        v_vertex = world_space_vert.xyz;
+        v_normal = (u_normalMatrix * normalize(a_normal)).xyz;
+    }
+
+fragment =
+    uniform mediump vec4 u_ambientColor;
+    uniform mediump vec4 u_diffuseColor1;
+    uniform mediump vec4 u_diffuseColor2;
+    uniform mediump vec4 u_specularColor;
+    uniform highp vec3 u_lightPosition;
+    uniform mediump float u_shininess;
+    uniform highp vec3 u_viewPosition;
+
+    uniform mediump float u_width;
+
+    varying highp vec3 v_position;
+    varying highp vec3 v_vertex;
+    varying highp vec3 v_normal;
+
+    void main()
+    {
+        mediump vec4 finalColor = vec4(0.0);
+        mediump vec4 diffuseColor = (mod((-v_position.x + v_position.y), u_width) < (u_width / 2.)) ? u_diffuseColor1 : u_diffuseColor2;
+
+        /* Ambient Component */
+        finalColor += u_ambientColor;
+
+        highp vec3 normal = normalize(v_normal);
+        highp vec3 lightDir = normalize(u_lightPosition - v_vertex);
+
+        /* Diffuse Component */
+        highp float NdotL = clamp(abs(dot(normal, lightDir)), 0.0, 1.0);
+        finalColor += (NdotL * diffuseColor);
+
+        /* Specular Component */
+        /* TODO: We should not do specularity for fragments facing away from the light.*/
+        highp vec3 reflectedLight = reflect(-lightDir, normal);
+        highp vec3 viewVector = normalize(u_viewPosition - v_vertex);
+        highp float NdotR = clamp(dot(viewVector, reflectedLight), 0.0, 1.0);
+        finalColor += pow(NdotR, u_shininess) * u_specularColor;
+
+        gl_FragColor = finalColor;
+        gl_FragColor.a = 1.0;
+    }
+
+[defaults]
+u_ambientColor = [0.3, 0.3, 0.3, 1.0]
+u_diffuseColor1 = [1.0, 0.5, 0.5, 1.0]
+u_diffuseColor2 = [0.5, 0.5, 0.5, 1.0]
+u_specularColor = [0.4, 0.4, 0.4, 1.0]
+u_shininess = 20.0
+u_width = 5.0
+
+[bindings]
+u_modelMatrix = model_matrix
+u_viewProjectionMatrix = view_projection_matrix
+u_normalMatrix = normal_matrix
+u_viewPosition = view_position
+u_lightPosition = light_0_position
+u_diffuseColor = diffuse_color
+
+[attributes]
+a_vertex = vertex
+a_normal = normal