@Override public PointF getValue(Keyframe<PointF> keyframe, float keyframeProgress) {
PathKeyframe pathKeyframe = (PathKeyframe) keyframe;
Path path = pathKeyframe.getPath();
if (path == null) {
return keyframe.startValue;
}
if (pathMeasureKeyframe != pathKeyframe) {
pathMeasure = new PathMeasure(path, false);
pathMeasureKeyframe = pathKeyframe;
}
pathMeasure.getPosTan(keyframeProgress * pathMeasure.getLength(), pos, null);
point.set(pos[0], pos[1]);
return point;
}
PathKeyframeAnimation.java 文件源码
java
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