public TweenableProperty <T> AddFrame(float frame, T value, EasingFunction easingFunction)
{
var newFrame = new TweenKeyFrame <T>(frame, value, easingFunction);
keyFrames.Add(newFrame);
keyFrames = keyFrames.OrderBy(x => x.frame).ToList();
return(this);
}
public bool Update(float timelineElapsed)
{
TweenKeyFrame <T> lastFrame = null;
TweenKeyFrame <T> nextFrame = null;
foreach (var frame in keyFrames)
{
if (frame.frame <= timelineElapsed)
{
lastFrame = frame;
}
else
{
nextFrame = frame;
break;
}
}
if (nextFrame == null)
{
if (!Done)
{
SetValue(lastFrame.value);
}
Done = true;
return(false);
}
else
{
if (lastFrame == null)
{
var progress = timelineElapsed / nextFrame.frame;
var easedProgress = nextFrame.easingFunction(progress);
var newValue = lerpFunction(initialValue, nextFrame.value, easedProgress);
SetValue(newValue);
}
else
{
var progress = (timelineElapsed - lastFrame.frame) / (nextFrame.frame - lastFrame.frame);
var easedProgress = nextFrame.easingFunction(progress);
var newValue = lerpFunction(lastFrame.value, nextFrame.value, easedProgress);
SetValue(newValue);
}
}
return(true);
}
