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Implement caching for CurveLocation#curveOffset.

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This commit is contained in:
Jürg Lehni 2017-02-21 22:19:17 +01:00
parent f089c3c620
commit ee48e6cd03
1 changed files with 9 additions and 4 deletions
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13
src/path/CurveLocation.js
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@ -121,7 +121,7 @@ var CurveLocation = Base.extend(/** @lends CurveLocation# */{
if (path && path._version !== this._version) {
// If the path's segments have changed, clear the cached time and
// offset values and force re-fetching of the correct curve.
this._time = this._offset = this._curve = null;
this._time = this._offset = this._curveOffset = this._curve = null;
}
// If path is out of sync, access current curve objects through segment1
@ -232,9 +232,14 @@ var CurveLocation = Base.extend(/** @lends CurveLocation# */{
* @type Number
*/
getCurveOffset: function() {
var curve = this.getCurve(),
time = this.getTime();
return time != null && curve && curve.getPartLength(0, time);
var offset = this._curveOffset;
if (offset == null) {
var curve = this.getCurve(),
time = this.getTime();
this._curveOffset = offset = time != null && curve
&& curve.getPartLength(0, time);
}
return offset;
},
/**