fix/improve normal calculation, noticed when checking on the previous bugfix.

- normals depended on the meshes rotation, so you could rotate Suzzane and in some cases one of the eye normals would be flipped.
- normals depended on the meshes placement in relation to the meshes center, now find the outer most face by each face-island center.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/bmesh/intern/bmesh_queries.h b/source/blender/bmesh/intern/bmesh_queries.h
index 7d599a9c8af..94dae1d1d23 100644
--- a/source/blender/bmesh/intern/bmesh_queries.h
+++ b/source/blender/bmesh/intern/bmesh_queries.h
@@ -115,6 +115,8 @@ bool BM_face_is_any_vert_flag_test(BMFace *f, const char hflag);
 bool BM_face_is_any_edge_flag_test(BMFace *f, const char hflag);
 
 float BM_mesh_calc_volume(BMesh *bm, bool is_signed);
+int   BM_mesh_calc_face_groups(BMesh *bm, int *r_groups_array, int (**r_group_index)[2],
+                               void *user_data, bool (*filter_fn)(BMEdge *, void *user_data));
 
 /* not really any good place  to put this */
 float bmesh_subd_falloff_calc(const int falloff, float val);