public void addKeyFrameTranslation(int keyFrameIndex, Vector3f offset) {
        float time = keyFrameIndex / fps;
        addTimeTranslation(time, offset);
    }
Add a keyframe for the specified translation at the specified index.

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