@Override
    public Vector3f getSeatedToAbsolutePosition() {
        if( environment.isSeatedExperience() == false ) return Vector3f.ZERO;
        if( hmdSeatToStand == null ) {
            hmdSeatToStand = new Vector3f();
            HmdMatrix34_t mat = vrSystemFunctions.GetSeatedZeroPoseToStandingAbsoluteTrackingPose.apply();
            Matrix4f tempMatrix = new Matrix4f();
            convertSteamVRMatrix3ToMatrix4f(mat, tempMatrix);
            tempMatrix.toTranslationVector(hmdSeatToStand);
        }
        return hmdSeatToStand;
    }
Initialize the headset camera.
@param allowed <code>true</code> is the use of the headset camera is allowed and <code>false</code> otherwise.
jme3-vr/src/main/java/com/jme3/input/vr/openvr/OpenVR.java