public void drawHalfSphere(float r, int scalex, int scaley)
    {
        
        BufferData data = RobotRace.VBOUtil.bufferHalfSphere(1F, scalex, scaley);
        if(r != 1F)
            gl.glScalef(r, r, r);
        RobotRace.VBOUtil.drawBufferedObject(data);
        if(r != 1F)
            gl.glScaled(1/r, 1/r, 1/r);
    }