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Masking: prevent crashes in cases when mask spline is axis aligned

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This commit is contained in:
Lukas Toenne
2012-07-20 17:28:42 +00:00
parent 7271f8e38f
commit 44800e884c
1 changed files with 13 additions and 0 deletions
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13
source/blender/blenkernel/intern/mask.c
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@@ -574,12 +574,25 @@ static void spline_feather_collapse_inner_loops(MaskSpline *spline, float (*feat
max_delta_y = delta;
}
/* prevent divisionsby zero by ensuring bounding box is not collapsed */
if (max[0] - min[0] < FLT_EPSILON) {
max[0] += 0.01f;
min[0] -= 0.01f;
}
if (max[1] - min[1] < FLT_EPSILON) {
max[1] += 0.01f;
min[1] -= 0.01f;
}
/* use dynamically calculated buckets per side, so we likely wouldn't
* run into a situation when segment doesn't fit two buckets which is
* pain collecting candidates for intersection
*/
max_delta_x /= max[0] - min[0];
max_delta_y /= max[1] - min[1];
max_delta = MAX2(max_delta_x, max_delta_y);
buckets_per_side = MIN2(512, 0.9f / max_delta);