DRW: Support wire overlay clipping

1 files changed, 16 insertions, 0 deletions

diff --git a/source/blender/draw/modes/shaders/overlay_face_orientation_vert.glsl b/source/blender/draw/modes/shaders/overlay_face_orientation_vert.glsl
index d8a72f28eee..2d025bc65ee 100644
--- a/source/blender/draw/modes/shaders/overlay_face_orientation_vert.glsl
+++ b/source/blender/draw/modes/shaders/overlay_face_orientation_vert.glsl
@@ -1,7 +1,23 @@
 uniform mat4 ModelViewProjectionMatrix;
+uniform mat4 ModelMatrix;
+
+#ifdef USE_WORLD_CLIP_PLANES
+uniform vec4 WorldClipPlanes[6];
+uniform int  WorldClipPlanesLen;
+#endif
+
 in vec3 pos;
 
 void main()
 {
 	gl_Position = ModelViewProjectionMatrix * vec4(pos, 1.0);
+
+#ifdef USE_WORLD_CLIP_PLANES
+	{
+		vec3 worldPosition = (ModelMatrix * vec4(pos, 1.0)).xyz;
+		for (int i = 0; i < WorldClipPlanesLen; i++) {
+			gl_ClipDistance[i] = dot(WorldClipPlanes[i].xyz, worldPosition) + WorldClipPlanes[i].w;
+		}
+	}
+#endif
 }