public void setInvertHorizontalAxis(boolean invertXaxis) {
        this.invertXaxis = invertXaxis;
        if (inputManager != null) {
            inputManager.deleteMapping(CameraInput.CHASECAM_MOVELEFT);
            inputManager.deleteMapping(CameraInput.CHASECAM_MOVERIGHT);
            initHorizontalAxisInput();
            inputManager.addListener(this, CameraInput.CHASECAM_MOVELEFT, CameraInput.CHASECAM_MOVERIGHT);
        }
    }
invert the Horizontal axis movement of the mouse

@param invertXaxis true&rarr;inverted, false&rarr;not inverted
jme3-core/src/main/java/com/jme3/app/ChaseCameraAppState.java