public Vector3f worldToLocal(final Vector3f in, final Vector3f store) {
        checkDoTransformUpdate();
        return worldTransform.transformInverseVector(in, store);
    }
Convert a vector (in) from world coordinate space to this spatial's local
coordinate space.

@param in
           vector to read from
@param store
           where to write the result
@return the result (store)
jme3-core/src/main/java/com/jme3/scene/Spatial.java