diff options
| -rw-r--r-- | source/blender/bmesh/intern/bmesh_mesh_tessellate.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/source/blender/bmesh/intern/bmesh_mesh_tessellate.c b/source/blender/bmesh/intern/bmesh_mesh_tessellate.c index ca1218c97f6..2f9d5758385 100644 --- a/source/blender/bmesh/intern/bmesh_mesh_tessellate.c +++ b/source/blender/bmesh/intern/bmesh_mesh_tessellate.c @@ -58,6 +58,13 @@ BLI_INLINE void mesh_calc_tessellation_for_face_impl(BMLoop *(*looptris)[3], MemArena **pf_arena_p, const bool face_normal) { +#ifdef DEBUG + /* The face normal is used for projecting faces into 2D space for tessellation. + * Invalid normals may result in invalid tessellation. + * Either `face_normal` should be true or normals should be updated first. */ + BLI_assert(face_normal || BM_face_is_normal_valid(efa)); +#endif + switch (efa->len) { case 3: { /* `0 1 2` -> `0 1 2` */ |