public static void GetTimelineTransform(TransformTimeline timeline, float position, DBTransform retult)
{
List <Frame> frameList = timeline.FrameList;
int i = frameList.Count;
TransformFrame currentFrame;
float tweenEasing;
float progress;
TransformFrame nextFrame;
while (i-- > 0)
{
currentFrame = frameList[i] as TransformFrame;
if (currentFrame.Position <= position && currentFrame.Position + currentFrame.Duration > position)
{
tweenEasing = currentFrame.TweenEasing;
if (i == frameList.Count - 1 || float.IsNaN(tweenEasing) || position == currentFrame.Position)
{
retult.Copy(currentFrame.Global);
}
else
{
progress = (position - currentFrame.Position) / currentFrame.Duration;
if (tweenEasing != 0 && !float.IsNaN(tweenEasing))
{
progress = TimelineState.GetEaseValue(progress, tweenEasing);
}
nextFrame = frameList[i + 1] as TransformFrame;
retult.X = currentFrame.Global.X + (nextFrame.Global.X - currentFrame.Global.X) * progress;
retult.Y = currentFrame.Global.Y + (nextFrame.Global.Y - currentFrame.Global.Y) * progress;
retult.SkewX = TransformUtil.FormatRadian(currentFrame.Global.SkewX + (nextFrame.Global.SkewX - currentFrame.Global.SkewX) * progress);
retult.SkewY = TransformUtil.FormatRadian(currentFrame.Global.SkewY + (nextFrame.Global.SkewY - currentFrame.Global.SkewY) * progress);
retult.ScaleX = currentFrame.Global.ScaleX + (nextFrame.Global.ScaleX - currentFrame.Global.ScaleX) * progress;
retult.ScaleY = currentFrame.Global.ScaleY + (nextFrame.Global.ScaleY - currentFrame.Global.ScaleY) * progress;
}
break;
}
}
}
