public void addKeyFrameScale(int keyFrameIndex, Vector3f scale) {
        float animationTime = keyFrameIndex / fps;
        addTimeScale(animationTime, scale);
    }
Add a keyframe for the specified scaling at the specified index.

@param keyFrameIndex the keyframe in which full scaling should be
achieved (&ge;0)
@param scale the local scaling to apply to the target (not null,
unaffected)
jme3-core/src/main/java/com/jme3/anim/AnimFactory.java