Mesh: minor optimization to concave quad check for tessellation

Use the face normal (when available) for a faster concave quad test.

1 files changed, 5 insertions, 2 deletions

diff --git a/source/blender/bmesh/intern/bmesh_mesh_tessellate.c b/source/blender/bmesh/intern/bmesh_mesh_tessellate.c
index 18ec83057e2..c9b027474e1 100644
--- a/source/blender/bmesh/intern/bmesh_mesh_tessellate.c
+++ b/source/blender/bmesh/intern/bmesh_mesh_tessellate.c
@@ -95,8 +95,11 @@ BLI_INLINE void bmesh_calc_tessellation_for_face_impl(BMLoop *(*looptris)[3],
             efa->no, l_ptr_a[0]->v->co, l_ptr_a[1]->v->co, l_ptr_a[2]->v->co, l_ptr_b[2]->v->co);
       }
 
-      if (UNLIKELY(is_quad_flip_v3_first_third_fast(
-              l_ptr_a[0]->v->co, l_ptr_a[1]->v->co, l_ptr_a[2]->v->co, l_ptr_b[2]->v->co))) {
+      if (UNLIKELY(is_quad_flip_v3_first_third_fast_with_normal(l_ptr_a[0]->v->co,
+                                                                l_ptr_a[1]->v->co,
+                                                                l_ptr_a[2]->v->co,
+                                                                l_ptr_b[2]->v->co,
+                                                                efa->no))) {
         /* Flip out of degenerate 0-2 state. */
         l_ptr_a[2] = l_ptr_b[2];
         l_ptr_b[0] = l_ptr_a[1];