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Merge pull request #6902 from ahocevar/fix-kinetic

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Require minimum duration for kinetic animation
This commit is contained in:
Andreas Hocevar
2017-06-12 07:01:03 +02:00
committed by GitHub
parent 1d6ce6db35 dc6d0c091a
commit 107792635d
1 changed files with 8 additions and 0 deletions
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src/ol/kinetic.js
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@@ -94,7 +94,15 @@ ol.Kinetic.prototype.end = function() {
while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) { while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {
firstIndex -= 3; firstIndex -= 3;
} }
var duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2]; var duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];
// we don't want a duration of 0 (divide by zero)
// we also make sure the user panned for a duration of at least one frame
// (1/60s) to compute sane displacement values
if (duration < 1000 / 60) {
return false;
}
var dx = this.points_[lastIndex] - this.points_[firstIndex]; var dx = this.points_[lastIndex] - this.points_[firstIndex];
var dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1]; var dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];
this.angle_ = Math.atan2(dy, dx); this.angle_ = Math.atan2(dy, dx);