// update cache (optimized)
public override void updateCache()
{
// destroy cache
destroyCache(); //undo handled inside
// create new cache
_clearCache(); //undo handled inside
// sort keys
sortKeys(); //undo handled inside
for (int i = 0; i < keys.Count; i++)
{
AMScaleAction a = ScriptableObject.CreateInstance <AMScaleAction>();
a.startFrame = keys[i].frame;
if (keys.Count > (i + 1))
{
a.endFrame = keys[i + 1].frame;
}
else
{
a.endFrame = -1;
}
a.obj = obj;
a.startScale = (keys[i] as AMScaleKey).scale;
if (a.endFrame != -1)
{
a.endScale = (keys[i + 1] as AMScaleKey).scale;
}
a.easeType = (keys[i] as AMScaleKey).easeType;
a.customEase = new List <float>(keys[i].customEase);
// add to cache
cache.Add(a);
}
}
// preview a frame in the scene view
public override void previewFrame(float frame, AMTrack extraTrack = null)
{
if (!obj)
{
return;
}
if (cache.Count <= 1)
{
return;
}
// if before first frame
if (frame <= (float)cache[0].startFrame)
{
obj.localScale = (cache[0] as AMScaleAction).startScale;
return;
}
// if beyond last frame
if (frame >= (float)(cache[cache.Count - 2] as AMScaleAction).endFrame)
{
obj.localScale = (cache[cache.Count - 2] as AMScaleAction).endScale;
return;
}
// if lies on curve
for (int i = 0; i <= cache.Count - 2; ++i)
{
AMScaleAction action = cache[i] as AMScaleAction;
if (((int)frame < action.startFrame) || ((int)frame > action.endFrame))
{
continue;
}
float _value;
float framePositionInPath = frame - (float)action.startFrame;
if (framePositionInPath < 0f)
{
framePositionInPath = 0f;
}
AMTween.EasingFunction ease;
AnimationCurve curve = null;
if (action.hasCustomEase())
{
ease = AMTween.customEase;
curve = action.easeCurve;
}
else
{
ease = AMTween.GetEasingFunction((AMTween.EaseType)action.easeType);
}
_value = ease(0f, 1f, framePositionInPath / action.getNumberOfFrames(), curve);
obj.localScale = Vector3.Lerp(action.startScale, action.endScale, _value);
return;
}
}