bmesh edge rotate

* improve check to see if edge rotate can be done,
  was checking if both edges verts have an edge count of 2, which is really a meaningless test since the verts can have stray edges connected and the result wont work right.
  instead check if the next verts in both faces share a vertex.

* add utility function BM_face_other_vert_loop() which gets the next loop in a face.
* add convenience function BM_edge_face_pair() which returns 2 faces for edges that have exactly 2 face users. (saves ugly e->l->radial_next ... in code) and is more readable.

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 1fb0df7e2af..8c366d213d7 100644
--- a/source/blender/bmesh/intern/bmesh_queries.h
+++ b/source/blender/bmesh/intern/bmesh_queries.h
@@ -37,8 +37,10 @@ int     BM_edge_in_face(BMFace *f, BMEdge *e);
 int     BM_vert_in_edge(BMEdge *e, BMVert *v);
 int     BM_verts_in_edge(BMVert *v1, BMVert *v2, BMEdge *e);
 
+int     BM_edge_face_pair(BMEdge *e, BMFace **r_fa, BMFace **r_fb);
 BMVert *BM_edge_other_vert(BMEdge *e, BMVert *v);
 BMLoop *BM_face_other_loop(BMEdge *e, BMFace *f, BMVert *v);
+BMLoop *BM_face_other_vert_loop(BMVert *v_prev, BMFace *f, BMVert *v);
 
 int     BM_vert_edge_count(BMVert *v);
 int     BM_edge_face_count(BMEdge *e);