public override Vector2?GetValue(Keyframe <Vector2?> keyframe, float 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));
}
public override Vector2?GetValue(Keyframe <Vector2?> keyframe, float keyframeProgress)
{
var pathKeyframe = (PathKeyframe)keyframe;
var path = pathKeyframe.Path;
if (path == null || path.IsEmpty)
{
return(keyframe.StartValue);
}
if (ValueCallback != null)
{
var value = ValueCallback.GetValueInternal(pathKeyframe.StartFrame.Value, pathKeyframe.EndFrame.Value,
pathKeyframe.StartValue, pathKeyframe.EndValue, LinearCurrentKeyframeProgress,
keyframeProgress, Progress);
if (value != null)
{
return(value);
}
}
if (_pathMeasureKeyframe != pathKeyframe)
{
_pathMeasure?.Dispose();
_pathMeasure = new SKPathMeasure(path);
_pathMeasureKeyframe = pathKeyframe;
}
_pathMeasure.GetPositionAndTangent(keyframeProgress * _pathMeasure.Length, out var pos, out _);
return(new Vector2(pos.X, pos.Y));
}
public override Vector2?GetValue(Keyframe <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));
}
internal static PathKeyframe NewInstance(JsonObject json, LottieComposition composition, IAnimatableValueFactory <Vector2?> valueFactory)
{
var keyframe = KeyFrameFactory.NewInstance(json, composition, composition.DpScale, valueFactory);
Vector2?cp1 = null;
Vector2?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.Utils.CreatePath(keyframe.StartValue.Value, keyframe.EndValue.Value, cp1, cp2);
}
return(pathKeyframe);
}