1 files changed, 38 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl b/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl
new file mode 100644
index 00000000000..8ebfa4376f0
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_vert.glsl
@@ -0,0 +1,38 @@
+
+/* Solid Wirefram implementation
+ * Mike Erwin, Clément Foucault */
+
+/* This shader follows the principles of
+ * http://developer.download.nvidia.com/SDK/10/direct3d/Source/SolidWireframe/Doc/SolidWireframe.pdf */
+
+uniform mat4 ModelViewMatrix;
+uniform mat4 ModelViewProjectionMatrix;
+
+in vec3 pos;
+in ivec4 data;
+
+out vec4 vPos;
+out vec4 pPos;
+out ivec4 vData;
+
+#ifdef VERTEX_FACING
+uniform mat4 ProjectionMatrix;
+uniform mat3 NormalMatrix;
+
+in vec3 vnor;
+out float vFacing;
+#endif
+
+void main()
+{
+	vPos = ModelViewMatrix * vec4(pos, 1.0);
+	pPos = ModelViewProjectionMatrix * vec4(pos, 1.0);
+	vData = data;
+#ifdef VERTEX_FACING
+	vec3 view_normal = normalize(NormalMatrix * vnor);
+	vec3 view_vec = (ProjectionMatrix[3][3] == 0.0)
+		? normalize(vPos.xyz)
+		: vec3(0.0, 0.0, 1.0);
+	vFacing = dot(view_vec, view_normal);
+#endif
+}