/**
* Figures out the rotation needed to get from one vector to another, then applies that rotation
* to a third vector and normalizes the result.
*
* @param from The vector from which we are finding the transform.
* @param to The vector to which we are finding the transform.
* @param vec The vector to be transformed.
* @return A new vector that represents the rotated and normalized input {@code vec}.
*/
protected Vector3f transformAndNormalize(Vector3f from, Vector3f to, Vector3f vec) {
// find the transform between the first two vectors
Quat4f rot = MathUtil.getRotation(from, to);
Transform trans = new Transform();
trans.setIdentity();
if (!rot.equals(new Quat4f())) {
trans.setRotation(rot);
}
// apply the transform to the third vector and normalize
Vector3f temp = new Vector3f(vec);
trans.transform(temp);
temp.normalize();
return temp;
}
