diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_geom.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_geom.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index 7665b8eedd0..71a6e195631 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -179,6 +179,24 @@ float area_poly_v2(const float verts[][2], unsigned int nr) return fabsf(0.5f * cross_poly_v2(verts, nr)); } +float cotangent_tri_weight_v3(const float v1[3], const float v2[3], const float v3[3]) +{ + float a[3], b[3], c[3], c_len; + + sub_v3_v3v3(a, v2, v1); + sub_v3_v3v3(b, v3, v1); + cross_v3_v3v3(c, a, b); + + c_len = len_v3(c); + + if (c_len > FLT_EPSILON) { + return dot_v3v3(a, b) / c_len; + } + else { + return 0.0f; + } +} + /********************************* Planes **********************************/ /** |