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GPencil: Improve Flip algorithm for Interpolate 

If the lines cross, but the angle is very sharp, check the distance between the extremes.
This commit is contained in:
Antonio Vazquez 2021-02-23 23:05:44 +01:00
parent b67b1d59c3
commit 4d9d87d2bf
1 changed files with 14 additions and 0 deletions
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14
source/blender/editors/gpencil/gpencil_interpolate.c
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@ -198,6 +198,20 @@ static bool gpencil_stroke_need_flip(Depsgraph *depsgraph,
gpencil_point_to_xy_fl(gsc, gps_from, &pt_dummy_ps, &v2b[0], &v2b[1]);
if (isect_seg_seg_v2(v1a, v1b, v2a, v2b) == ISECT_LINE_LINE_CROSS) {
float v1[2], v2[2];
sub_v2_v2v2(v1, v1b, v1a);
sub_v2_v2v2(v2, v2b, v2a);
float angle = angle_v2v2(v1, v2);
/* For very sharp angles, check distance between extremes. */
if (angle < DEG2RADF(15.0f)) {
float dist_start = len_squared_v2v2(v1a, v1a);
float dist_end = len_squared_v2v2(v1a, v1b);
if (dist_end < dist_start) {
return true;
}
return false;
}
return true;
}