/// <summary>
/// Same as the Apply method, but applies to a specified Node instead of it's associated node.
/// </summary>
/// <param name="node"></param>
/// <param name="time"></param>
/// <param name="weight"></param>
/// <param name="accumulate"></param>
public void ApplyToNode(Node node, float time, float weight, bool accumulate, float scale)
{
TransformKeyFrame kf = new TransformKeyFrame(null, time);
this.GetInterpolatedKeyFrame(time, kf);
if(accumulate) {
// add to existing. Weights are not relative, but treated as absolute multipliers for the animation
Vector3 translate = kf.Translate * weight * scale;
node.Translate(translate);
// interpolate between not rotation and full rotation, to point weight, so 0 = no rotate, and 1 = full rotation
Quaternion rotate = Quaternion.Slerp(weight, Quaternion.Identity, kf.Rotation);
node.Rotate(rotate);
// TODO: not yet sure how to modify scale for cumulative animations
Vector3 scaleVector = kf.Scale;
// Not sure how to modify scale for cumulative anims... leave it alone
//scaleVector = ((Vector3::UNIT_SCALE - kf.getScale()) * weight) + Vector3::UNIT_SCALE;
if (scale != 1.0f && scaleVector != Vector3.UnitScale)
scaleVector = Vector3.UnitScale + (scaleVector - Vector3.UnitScale) * scale;
node.Scale(scaleVector);
}
else {
// apply using weighted transform method
node.WeightedTransform(weight, ref kf.translate, ref kf.rotation, ref kf.scale, false);
}
}
