diff options
| author | Campbell Barton <ideasman42@gmail.com> | 2018-02-08 15:38:17 +0300 |
|---|---|---|
| committer | Campbell Barton <ideasman42@gmail.com> | 2018-02-08 15:38:17 +0300 |
| commit | f088c6b9f6d69e7f1af15a059f122589ee6a39ab (patch) | |
| tree | b71a5937a7059d24ea5a91896bac3213d2409440 /source/blender/bmesh/intern/bmesh_polygon.c | |
| parent | 5f2b4002f49b08f68b1e37b267eceb0b340af713 (diff) | |
Mesh: concave quad support
Previously quads always split along first-third vertices.
This is still the default, to avoid flickering with animated deformation
however concave quads that would create two opposing triangles now use
second-fourth split.
Reported as T53999 although this issue has been known limitation
for a long time.
Diffstat (limited to 'source/blender/bmesh/intern/bmesh_polygon.c')
| -rw-r--r-- | source/blender/bmesh/intern/bmesh_polygon.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/source/blender/bmesh/intern/bmesh_polygon.c b/source/blender/bmesh/intern/bmesh_polygon.c index 66fcd739839..66d0a83eb9f 100644 --- a/source/blender/bmesh/intern/bmesh_polygon.c +++ b/source/blender/bmesh/intern/bmesh_polygon.c @@ -1426,6 +1426,17 @@ void BM_mesh_calc_tessellation(BMesh *bm, BMLoop *(*looptris)[3], int *r_looptri (l_ptr_a[2] = l_ptr_b[1] = l = l->next); ( l_ptr_b[2] = l->next); #endif + + if (UNLIKELY(is_quad_flip_v3_first_third_fast( + l_ptr_a[0]->v->co, + l_ptr_a[1]->v->co, + l_ptr_a[2]->v->co, + l_ptr_b[2]->v->co))) + { + /* flip out of degenerate 0-2 state. */ + l_ptr_a[2] = l_ptr_b[2]; + l_ptr_b[0] = l_ptr_a[1]; + } } #endif /* USE_TESSFACE_SPEEDUP */ |