diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_geom.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_geom.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index 83750277bf6..46db33283c3 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -3335,10 +3335,16 @@ float closest_to_line_v3(float r_close[3], const float p[3], const float l1[3], float closest_to_line_v2(float r_close[2], const float p[2], const float l1[2], const float l2[2]) { - float h[2], u[2], lambda; + float h[2], u[2], lambda, denom; sub_v2_v2v2(u, l2, l1); sub_v2_v2v2(h, p, l1); - lambda = dot_v2v2(u, h) / dot_v2v2(u, u); + denom = dot_v2v2(u, u); + if (denom == 0.0f) { + r_close[0] = l1[0]; + r_close[1] = l1[1]; + return 0.0f; + } + lambda = dot_v2v2(u, h) / denom; r_close[0] = l1[0] + u[0] * lambda; r_close[1] = l1[1] + u[1] * lambda; return lambda; @@ -3353,12 +3359,12 @@ double closest_to_line_v2_db(double r_close[2], sub_v2_v2v2_db(u, l2, l1); sub_v2_v2v2_db(h, p, l1); denom = dot_v2v2_db(u, u); - if (denom < DBL_EPSILON) { + if (denom == 0.0) { r_close[0] = l1[0]; r_close[1] = l1[1]; return 0.0; } - lambda = dot_v2v2_db(u, h) / dot_v2v2_db(u, u); + lambda = dot_v2v2_db(u, h) / denom; r_close[0] = l1[0] + u[0] * lambda; r_close[1] = l1[1] + u[1] * lambda; return lambda; |