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| author | Campbell Barton <ideasman42@gmail.com> | 2019-08-05 15:31:42 +0300 |
|---|---|---|
| committer | Campbell Barton <ideasman42@gmail.com> | 2019-08-05 15:43:23 +0300 |
| commit | e31a1c6fd3e1b53af9de4a3da2a234ea2331a35b (patch) | |
| tree | 5a8b2e9bdc7109e51a57de8591862de5fa68210a /source/blender/blenlib | |
| parent | f9cf8151603dc3e3cad09e79027e8f4d89ee1ae7 (diff) | |
Fix T67109: n-gon tessellation error with co-linear edges
Improve the area calculation method for better precision,
so faces offset from the center don't have a less precise area.
Diffstat (limited to 'source/blender/blenlib')
| -rw-r--r-- | source/blender/blenlib/intern/polyfill_2d.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/source/blender/blenlib/intern/polyfill_2d.c b/source/blender/blenlib/intern/polyfill_2d.c index 575a4a06d6a..31b18079c73 100644 --- a/source/blender/blenlib/intern/polyfill_2d.c +++ b/source/blender/blenlib/intern/polyfill_2d.c @@ -193,7 +193,10 @@ BLI_INLINE eSign signum_enum(float a) */ BLI_INLINE float area_tri_signed_v2_alt_2x(const float v1[2], const float v2[2], const float v3[2]) { - return ((v1[0] * (v2[1] - v3[1])) + (v2[0] * (v3[1] - v1[1])) + (v3[0] * (v1[1] - v2[1]))); + float d2[2], d3[2]; + sub_v2_v2v2(d2, v2, v1); + sub_v2_v2v2(d3, v3, v1); + return (d2[0] * d3[1]) - (d3[0] * d2[1]); } static eSign span_tri_v2_sign(const float v1[2], const float v2[2], const float v3[2]) |