1 files changed, 11 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/subdiv_ccg.c b/source/blender/blenkernel/intern/subdiv_ccg.c
index 3c1a9c4d3d6..dff7170e517 100644
--- a/source/blender/blenkernel/intern/subdiv_ccg.c
+++ b/source/blender/blenkernel/intern/subdiv_ccg.c
@@ -1780,3 +1780,14 @@ void BKE_subdiv_ccg_neighbor_coords_get(const SubdivCCG *subdiv_ccg,
   }
 #endif
 }
+
+int BKE_subdiv_cgg_grid_to_face_index(const SubdivCCG *subdiv_ccg, const int grid_index)
+{
+  Subdiv *subdiv = subdiv_ccg->subdiv;
+  OpenSubdiv_TopologyRefiner *topology_refiner = subdiv->topology_refiner;
+  SubdivCCGFace *face = subdiv_ccg->grid_faces[grid_index];
+
+  const int face_grid_index = grid_index - face->start_grid_index;
+  const int face_index = face - subdiv_ccg->faces;
+  return face_index;
+}