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BMesh: avoid using temp array for face-area

This commit is contained in:
Campbell Barton 2016-11-18 05:55:37 +11:00
parent 46739f1e5c
commit 03a395766a
1 changed files with 5 additions and 13 deletions
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18
source/blender/bmesh/intern/bmesh_polygon.c
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@ -225,24 +225,16 @@ void BM_face_calc_point_in_face(const BMFace *f, float r_co[3])
*/
float BM_face_calc_area(const BMFace *f)
{
/* inline 'area_poly_v3' logic, avoid creating a temp array */
const BMLoop *l_iter, *l_first;
float (*verts)[3] = BLI_array_alloca(verts, f->len);
float area;
unsigned int i = 0;
float n[3];
zero_v3(n);
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
copy_v3_v3(verts[i++], l_iter->v->co);
add_newell_cross_v3_v3v3(n, l_iter->v->co, l_iter->next->v->co);
} while ((l_iter = l_iter->next) != l_first);
if (f->len == 3) {
area = area_tri_v3(verts[0], verts[1], verts[2]);
}
else {
area = area_poly_v3((const float (*)[3])verts, f->len);
}
return area;
return len_v3(n) * 0.5f;
}
/**