Mesh: Only check dirty normals flag of current domain

The code that checked whether vertex normals needed to be recalculated
was checking the dirty tag for face normals and vertex normals, in an
attempt at increased safety. However, those tags are always set
together anyway. Only checking the vertex dirty tag allows potentially
allocating or updating the normals on the two domains independently,
which could allow further skipping of calculations in some cases.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/mesh_normals.cc b/source/blender/blenkernel/intern/mesh_normals.cc
index ba1004e8371..2366b7526a1 100644
--- a/source/blender/blenkernel/intern/mesh_normals.cc
+++ b/source/blender/blenkernel/intern/mesh_normals.cc
@@ -345,7 +345,7 @@ void BKE_mesh_calc_normals_poly_and_vertex(const MVert *mvert,
 
 const float (*BKE_mesh_vertex_normals_ensure(const Mesh *mesh))[3]
 {
-  if (!(BKE_mesh_vertex_normals_are_dirty(mesh) || BKE_mesh_poly_normals_are_dirty(mesh))) {
+  if (!BKE_mesh_vertex_normals_are_dirty(mesh)) {
     BLI_assert(mesh->runtime.vert_normals != nullptr || mesh->totvert == 0);
     return mesh->runtime.vert_normals;
   }
@@ -356,7 +356,7 @@ const float (*BKE_mesh_vertex_normals_ensure(const Mesh *mesh))[3]
 
   ThreadMutex *normals_mutex = (ThreadMutex *)mesh->runtime.normals_mutex;
   BLI_mutex_lock(normals_mutex);
-  if (!(BKE_mesh_vertex_normals_are_dirty(mesh) || BKE_mesh_poly_normals_are_dirty(mesh))) {
+  if (!BKE_mesh_vertex_normals_are_dirty(mesh)) {
     BLI_assert(mesh->runtime.vert_normals != nullptr);
     BLI_mutex_unlock(normals_mutex);
     return mesh->runtime.vert_normals;