public override Vector2?GetValue(IKeyframe <Vector2?> keyframe, float keyframeProgress)
{
var pathKeyframe = (PathKeyframe)keyframe;
var path = pathKeyframe.Path;
if (path == null || path.Contours.Count == 0)
{
return(keyframe.StartValue);
}
if (_pathMeasureKeyframe != pathKeyframe)
{
_pathMeasure = new PathMeasure(path);
_pathMeasureKeyframe = pathKeyframe;
}
return(_pathMeasure.GetPosTan(keyframeProgress * _pathMeasure.Length));
}
public override PointF GetValue(IKeyframe <PointF> keyframe, float keyframeProgress)
{
var pathKeyframe = (PathKeyframe)keyframe;
var path = pathKeyframe.Path;
if (path == null || path.Contours.Count == 0)
{
return(keyframe.StartValue);
}
if (_pathMeasureKeyframe != pathKeyframe)
{
_pathMeasure = new PathMeasure(path);
_pathMeasureKeyframe = pathKeyframe;
}
_pathMeasure.GetPosTan(keyframeProgress * _pathMeasure.Length, ref _pos);
_point.Set(_pos[0], _pos[1]);
return(_point);
}
internal static PathKeyframe NewInstance(JsonObject json, LottieComposition composition, IAnimatableValueFactory <PointF> valueFactory)
{
var keyframe = KeyFrameFactory.NewInstance(json, composition, composition.DpScale, valueFactory);
PointF cp1 = null;
PointF cp2 = null;
var tiJson = json.GetNamedArray("ti", null);
var toJson = json.GetNamedArray("to", null);
if (tiJson != null && toJson != null)
{
cp1 = JsonUtils.PointFromJsonArray(toJson, composition.DpScale);
cp2 = JsonUtils.PointFromJsonArray(tiJson, composition.DpScale);
}
var pathKeyframe = new PathKeyframe(composition, keyframe.StartValue, keyframe.EndValue, keyframe.Interpolator, keyframe.StartFrame, keyframe.EndFrame);
var equals = keyframe.EndValue != null && keyframe.StartValue != null && keyframe.StartValue.Equals(keyframe.EndValue);
if (pathKeyframe.EndValue != null && !equals)
{
pathKeyframe._path = Utils.CreatePath(keyframe.StartValue, keyframe.EndValue, cp1, cp2);
}
return(pathKeyframe);
}