public static Matrix4f convertSteamVRMatrix4ToMatrix4f(com.jme3.system.jopenvr.HmdMatrix44_t hmdMatrix, Matrix4f mat){
        mat.set(hmdMatrix.m[0], hmdMatrix.m[1], hmdMatrix.m[2], hmdMatrix.m[3],
                hmdMatrix.m[4], hmdMatrix.m[5], hmdMatrix.m[6], hmdMatrix.m[7],
                hmdMatrix.m[8], hmdMatrix.m[9], hmdMatrix.m[10], hmdMatrix.m[11],
                hmdMatrix.m[12], hmdMatrix.m[13], hmdMatrix.m[14], hmdMatrix.m[15]);
        return mat;
    }
Convert specific OpenVR {@link com.jme3.system.jopenvr.HmdMatrix44_t HmdMatrix34_t} into JME {@link Matrix4f Matrix4f}
@param hmdMatrix the input matrix
@param mat the converted matrix
@return the converted matrix
jme3-vr/src/main/java/com/jme3/input/vr/openvr/OpenVR.java