diff options
Diffstat (limited to 'source')
| -rw-r--r-- | source/blender/blenkernel/intern/fcurve.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/source/blender/blenkernel/intern/fcurve.c b/source/blender/blenkernel/intern/fcurve.c index 65b9d2159df..d7d46427b8c 100644 --- a/source/blender/blenkernel/intern/fcurve.c +++ b/source/blender/blenkernel/intern/fcurve.c @@ -2050,8 +2050,14 @@ static float fcurve_eval_keyframes(FCurve *fcu, BezTriple *bezts, float evaltime /* evaltime occurs somewhere in the middle of the curve */ bool exact = false; - /* - use binary search to find appropriate keyframes */ - a = binarysearch_bezt_index_ex(bezts, evaltime, fcu->totvert, 0.001, &exact); + /* Use binary search to find appropriate keyframes... + * + * The threshold here has the following constraints: + * - 0.001 is too coarse -> We get artifacts with 2cm driver movements at 1BU = 1m (see T40332) + * - 0.00001 is too fine -> Weird errors, like selecting the wrong keyframe range (see T39207), occur. + * This lower bound was established in b888a32eee8147b028464336ad2404d8155c64dd + */ + a = binarysearch_bezt_index_ex(bezts, evaltime, fcu->totvert, 0.0001, &exact); if (G.debug & G_DEBUG) printf("eval fcurve '%s' - %f => %d/%d, %d\n", fcu->rna_path, evaltime, a, fcu->totvert, exact); if (exact) { |