Edit Mesh Mode: Add a facing falloff effect

This let the user keep track of the shape by fading the center of the object.
An Opacity parameter is yet to be added.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/draw/modes/shaders/edit_mesh_overlay_geom_tri.glsl b/source/blender/draw/modes/shaders/edit_mesh_overlay_geom_tri.glsl
index afd1e5a74a8..f83402e3869 100644
--- a/source/blender/draw/modes/shaders/edit_mesh_overlay_geom_tri.glsl
+++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_geom_tri.glsl
@@ -29,6 +29,9 @@ uniform vec2 viewportSize;
 in vec4 vPos[];
 in vec4 pPos[];
 in ivec4 vData[];
+#ifdef VERTEX_FACING
+in float vFacing[];
+#endif
 
 /* these are the same for all vertices
  * and does not need interpolation */
@@ -40,6 +43,9 @@ flat out int clipCase;
 #ifdef VERTEX_SELECTION
 out vec3 vertexColor;
 #endif
+#ifdef VERTEX_FACING
+out float facing;
+#endif
 
 /* See fragment shader */
 noperspective out vec4 eData1;
@@ -103,6 +109,10 @@ void doVertex(int v, vec4 pos)
 	vertexColor = getVertexColor(v);
 #endif
 
+#ifdef VERTEX_FACING
+	facing = vFacing[v];
+#endif
+
 	gl_Position = pos;
 
 	EmitVertex();