GLU.gluOrtho2D(0, mode.getWidth(), 0, mode.getHeight());
GLU.gluOrtho2D(0, width, 0, height);
    public void setOrtho() {        if (inOrthoMode) {            throw new JmeException("Already in Orthographic mode.");        }        // set up ortho mode        GL11.glMatrixMode(GL11.GL_PROJECTION);        GL11.glPushMatrix();        GL11.glLoadIdentity();        GLU.gluOrtho2D(0, mode.getWidth(), 0, mode.getHeight());        GL11.glMatrixMode(GL11.GL_MODELVIEW);        GL11.glPushMatrix();        GL11.glLoadIdentity();        inOrthoMode = true;    }