diff options
Diffstat (limited to 'source/blender/bmesh/intern/bmesh_polygon.c')
| -rw-r--r-- | source/blender/bmesh/intern/bmesh_polygon.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/source/blender/bmesh/intern/bmesh_polygon.c b/source/blender/bmesh/intern/bmesh_polygon.c index d235aaaa622..525dd5b1f9c 100644 --- a/source/blender/bmesh/intern/bmesh_polygon.c +++ b/source/blender/bmesh/intern/bmesh_polygon.c @@ -337,6 +337,34 @@ void BM_face_calc_center_mean(BMFace *f, float r_cent[3]) } /** + * computes the center of a face, using the mean average + * weighted by edge length + */ +void BM_face_calc_center_mean_weighted(BMFace *f, float r_cent[3]) +{ + BMLoop *l_iter; + BMLoop *l_first; + float totw = 0.0f; + float w_prev; + + zero_v3(r_cent); + + + l_iter = l_first = BM_FACE_FIRST_LOOP(f); + w_prev = BM_edge_calc_length(l_iter->prev->e); + do { + const float w_curr = BM_edge_calc_length(l_iter->e); + const float w = (w_curr + w_prev); + madd_v3_v3fl(r_cent, l_iter->v->co, w); + totw += w; + w_prev = w_curr; + } while ((l_iter = l_iter->next) != l_first); + + if (totw != 0.0f) + mul_v3_fl(r_cent, 1.0f / (float) totw); +} + +/** * COMPUTE POLY PLANE * * Projects a set polygon's vertices to |