Campbell Barton
7068fee2dd
On a place, Ctrl+T, Fkey would create a quad overlapping the 2 Tris. Now this case is checked for in a general way - if the bounds of the face are already filled in with faces (that _only_ use these edges-verts), then dont create the face. This is an option for the 'edgenet_fill' operator, since creating the face isnt incorrect, just not-what-you-want mostly. added functions * BM_edge_share_vert - returns shared vert between 2 edges. * BM_face_exists_multi, BM_face_exists_multi_edge - check if existing faces fill the edge bounds. * also add BM_ELEM_INTERNAL_TAG so low level functions can tag without conflicting with higher level functions that also rely on tagging elements.