Improvements to bmesh edge rotate

On a user level, edge rotate now works better with multiple edges selected, it wont make zero area faces or rotate edges into existing ones.

With a single edge selected - rotate is less strict and will allow ugly resulting faces but still checks on duplicate edges.

API:
* BM_edge_rotate now takes a flag, to optionally...
** check for existing edge
** splice edge (rotate and merge)
** check for degenerate resulting faces (overlapping geometry, zero area)
** beauty - only rotate to a better fit.
... this allows it to still be used as a low level API function since all checks can be skipped.

* BM_edge_rotate() now works a bit different, it find the new edge rotation before joining the faces - exposed by BM_edge_rotate_calc().

* Added api call bmesh_radial_faceloop_find_vert() - Radial Find a Vertex Loop in Face

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/bmesh/operators/bmo_triangulate.c b/source/blender/bmesh/operators/bmo_triangulate.c
index 2029d595af7..63837b7e087 100644
--- a/source/blender/bmesh/operators/bmo_triangulate.c
+++ b/source/blender/bmesh/operators/bmo_triangulate.c
@@ -139,7 +139,7 @@ void bmo_beautify_fill_exec(BMesh *bm, BMOperator *op)
 				fac2 = opp1 / (len2 + len3 + len6) + opp2 / (len4 + len1 + len6);
 				
 				if (fac1 > fac2) {
-					e = BM_edge_rotate(bm, e, FALSE);
+					e = BM_edge_rotate(bm, e, FALSE, BM_EDGEROT_CHECK_EXISTS);
 					if (e) {
 						BMO_elem_flag_enable(bm, e, ELE_NEW);