Quaternion getRotationAtFrame(int frame, int frameRate)
{
// if before or equal to first frame, or is the only frame
RotationKey firstKey = keys[0] as RotationKey;
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++)
{
RotationKey key = keys[i] as RotationKey;
RotationKey keyNext = i + 1 < keys.Count ? keys[i + 1] as RotationKey : 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 find Quaternion using easing function
float numFrames = (float)key.getNumberOfFrames(frameRate);
float framePositionInAction = Mathf.Clamp(frame - (float)key.frame, 0f, numFrames);
Quaternion qStart = key.rotation;
Quaternion qEnd = keyNext.rotation;
if (key.hasCustomEase())
{
return(Quaternion.LerpUnclamped(qStart, qEnd, Utility.EaseCustom(0.0f, 1.0f, framePositionInAction / numFrames, key.easeCurve)));
}
else
{
var ease = Utility.GetEasingFunction((Ease)key.easeType);
return(Quaternion.LerpUnclamped(qStart, qEnd, ease(framePositionInAction, numFrames, key.amplitude, key.period)));
}
}
Debug.LogError("Animator: Could not get rotation at frame '" + frame + "'");
return(Quaternion.identity);
}
Quaternion getRotationAtFrame(Transform transform, float frame, int frameRate)
{
int keyCount = keys.Count;
if (keyCount <= 0)
{
return(transform.localRotation);
}
int iFrame = Mathf.RoundToInt(frame);
var firstKey = keys[0] as RotationKey;
//check if only key or behind first key
if (keyCount == 1 || iFrame <= firstKey.frame)
{
return(firstKey.rotation);
}
// if lies on rotation action
for (int i = 0; i < keyCount; i++)
{
RotationKey key = keys[i] as RotationKey;
if (key.endFrame == -1) //invalid
{
continue;
}
//end of last path in track?
if (iFrame >= key.endFrame)
{
if (key.interp == Key.Interpolation.None)
{
if (i + 1 == keyCount)
{
return(key.rotation);
}
}
else if (key.interp == Key.Interpolation.Linear || key.path == null)
{
if (i + 1 == keyCount - 1)
{
return(((RotationKey)keys[i + 1]).rotation);
}
}
else if (key.interp == Key.Interpolation.Curve)
{
if (i + key.keyCount == keyCount) //end of last path in track?
{
return(((RotationKey)keys[i + key.keyCount - 1]).rotation);
}
}
continue;
}
if (key.interp == Key.Interpolation.None)
{
return(key.rotation);
}
else if (key.interp == Key.Interpolation.Linear || key.path == null)
{
RotationKey keyNext = keys[i + 1] as RotationKey;
float numFrames = (float)key.getNumberOfFrames(frameRate);
float framePositionInAction = Mathf.Clamp(frame - (float)key.frame, 0f, numFrames);
Quaternion qStart = key.rotation;
Quaternion qEnd = keyNext.rotation;
if (key.hasCustomEase())
{
return(Quaternion.LerpUnclamped(qStart, qEnd, Utility.EaseCustom(0.0f, 1.0f, framePositionInAction / numFrames, key.easeCurve)));
}
else
{
var ease = Utility.GetEasingFunction((Ease)key.easeType);
return(Quaternion.LerpUnclamped(qStart, qEnd, ease(framePositionInAction, numFrames, key.amplitude, key.period)));
}
}
else
{
float _value = Mathf.Clamp01((frame - key.frame) / key.getNumberOfFrames(frameRate));
return(key.GetRotationFromPath(Mathf.Clamp01(_value)));
}
}
return(transform.localRotation);
}
// 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;
int keyCount = keys.Count;
if (!t)
{
return;
}
if (keys == null || keyCount <= 0)
{
return;
}
// if before or equal to first frame, or is the only frame
RotationKey firstKey = keys[0] as RotationKey;
if (firstKey.endFrame == -1 || (frame <= (float)firstKey.frame && !firstKey.canTween))
{
t.localRotation = firstKey.rotation;
return;
}
// if lies on rotation action
for (int i = 0; i < keys.Count; i++)
{
RotationKey key = keys[i] as RotationKey;
RotationKey keyNext = i + 1 < keys.Count ? keys[i + 1] as RotationKey : null;
if (frame >= (float)key.endFrame && keyNext != null && (!keyNext.canTween || keyNext.endFrame != -1))
{
continue;
}
// if no ease
if (!key.canTween || keyNext == null)
{
t.localRotation = key.rotation;
return;
}
// else find Quaternion using easing function
float numFrames = (float)key.getNumberOfFrames(frameRate);
float framePositionInAction = Mathf.Clamp(frame - (float)key.frame, 0f, numFrames);
Quaternion qStart = key.rotation;
Quaternion qEnd = keyNext.rotation;
if (key.hasCustomEase())
{
t.localRotation = Quaternion.LerpUnclamped(qStart, qEnd, Utility.EaseCustom(0.0f, 1.0f, framePositionInAction / numFrames, key.easeCurve));
}
else
{
var ease = Utility.GetEasingFunction((Ease)key.easeType);
t.localRotation = Quaternion.LerpUnclamped(qStart, qEnd, ease(framePositionInAction, numFrames, key.amplitude, key.period));
}
return;
}
}