int NUM_PIZZA_SLICES=90;
        for(int i = 0; i <= NUM_PIZZA_SLICES; i++){ //NUM_PIZZA_SLICES decides how round the circle looks.
            double SUBDIVISIONS=180;
            double angle = Math.PI * 2 * i / SUBDIVISIONS;
            GL11.glVertex2f((float) Math.cos(angle), (float) Math.sin(angle));
        }