// preview a frame in the scene view
public override void previewFrame(ITarget target, float frame, int frameRate, bool play, float playSpeed)
{
Transform t = GetTarget(target) as Transform;
if (!t)
{
return;
}
if (keys == null || keys.Count <= 0)
{
return;
}
// if before or equal to first frame, or is the only frame
RotationEulerKey firstKey = keys[0] as RotationEulerKey;
if (firstKey.endFrame == -1 || (frame <= firstKey.frame && !firstKey.canTween))
{
ApplyRot(t, firstKey.rotation);
return;
}
// if lies on rotation action
for (int i = 0; i < keys.Count; i++)
{
RotationEulerKey key = keys[i] as RotationEulerKey;
RotationEulerKey keyNext = i + 1 < keys.Count ? keys[i + 1] as RotationEulerKey : null;
if (frame >= (float)key.endFrame && keyNext != null && (!keyNext.canTween || keyNext.endFrame != -1))
{
continue;
}
// if no ease
if (!key.canTween || keyNext == null)
{
ApplyRot(t, key.rotation);
return;
}
// else easing function
float numFrames = (float)key.getNumberOfFrames(frameRate);
float framePositionInAction = Mathf.Clamp(frame - key.frame, 0f, numFrames);
Vector3 qStart = key.rotation;
Vector3 qEnd = keyNext.rotation;
if (key.hasCustomEase())
{
ApplyRot(t, Vector3.Lerp(qStart, qEnd, Utility.EaseCustom(0.0f, 1.0f, framePositionInAction / numFrames, key.easeCurve)));
}
else
{
var ease = Utility.GetEasingFunction(key.easeType);
ApplyRot(t, Vector3.Lerp(qStart, qEnd, ease(framePositionInAction, numFrames, key.amplitude, key.period)));
}
return;
}
}
Vector3 getRotationAtFrame(int frame, int frameRate)
{
// if before or equal to first frame, or is the only frame
RotationEulerKey firstKey = keys[0] as RotationEulerKey;
if (firstKey.endFrame == -1 || (frame <= (float)firstKey.frame && !firstKey.canTween))
{
return(firstKey.rotation);
}
// if lies on rotation action
for (int i = 0; i < keys.Count; i++)
{
RotationEulerKey key = keys[i] as RotationEulerKey;
RotationEulerKey keyNext = i + 1 < keys.Count ? keys[i + 1] as RotationEulerKey : null;
if (frame >= (float)key.endFrame && keyNext != null && (!keyNext.canTween || keyNext.endFrame != -1))
{
continue;
}
// if no ease
if (!key.canTween || keyNext == null)
{
return(key.rotation);
}
// else easing function
float numFrames = (float)key.getNumberOfFrames(frameRate);
float framePositionInAction = Mathf.Clamp(frame - (float)key.frame, 0f, numFrames);
Vector3 qStart = key.rotation;
Vector3 qEnd = keyNext.rotation;
if (key.hasCustomEase())
{
return(Vector3.Lerp(qStart, qEnd, Utility.EaseCustom(0.0f, 1.0f, framePositionInAction / numFrames, key.easeCurve)));
}
else
{
var ease = Utility.GetEasingFunction(key.easeType);
return(Vector3.Lerp(qStart, qEnd, ease(framePositionInAction, numFrames, key.amplitude, key.period)));
}
}
Debug.LogError("Animator: Could not get rotation at frame '" + frame + "'");
return(Vector3.zero);
}
