public override Vector?GetValue(Keyframe <Vector?> keyframe, double keyframeProgress)
{
var pathKeyframe = (PathKeyframe)keyframe;
var path = pathKeyframe.Path;
if (path == null || path.Contours.Count == 0)
{
return(keyframe.StartValue);
}
if (ValueCallback != null)
{
return(ValueCallback.GetValueInternal(pathKeyframe.StartFrame.Value, pathKeyframe.EndFrame.Value,
pathKeyframe.StartValue, pathKeyframe.EndValue, LinearCurrentKeyframeProgress,
keyframeProgress, Progress));
}
if (_pathMeasureKeyframe != pathKeyframe)
{
_pathMeasure?.Dispose();
_pathMeasure = new PathMeasure(path);
_pathMeasureKeyframe = pathKeyframe;
}
return(_pathMeasure.GetPosTan(keyframeProgress * _pathMeasure.Length));
}
private void Dispose(bool disposing)
{
if (_pathMeasure != null)
{
_pathMeasure.Dispose(disposing);
_pathMeasure = null;
}
}
