public long getChain(int eye) {
        return chains[eye];
    }
Copy the values from a LibOVR vector into a jMonkeyEngine vector.

@param from The vector to copy from.
@param to   The vector to copy to.
@return The {@code to} argument.
jme3-vr/src/main/java/com/jme3/input/vr/oculus/OculusVR.java