1 files changed, 13 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/shaders/overlay_clipbound_vert.glsl b/source/blender/draw/engines/overlay/shaders/overlay_clipbound_vert.glsl
new file mode 100644
index 00000000000..c065a66414f
--- /dev/null
+++ b/source/blender/draw/engines/overlay/shaders/overlay_clipbound_vert.glsl
@@ -0,0 +1,13 @@
+
+#pragma BLENDER_REQUIRE(common_view_lib.glsl)
+
+void main()
+{
+  vec3 world_pos = boundbox[gl_VertexID];
+  gl_Position = point_world_to_ndc(world_pos);
+
+  /* Result in a position at 1.0 (far plane). Small epsilon to avoid precision issue.
+   * This mimics the effect of infinite projection matrix
+   * (see http://www.terathon.com/gdc07_lengyel.pdf). */
+  gl_Position.z = gl_Position.w - 2.4e-7;
+}