利用雾化绘制一个具有深度层次感的茶壶(提示:茶壶可以用void auxSolidTeapot(Gldouble size)来绘制,雾的颜色应设为黑色)-Rendering the use of atomization of a sense of deep-level Teapot (Hint: teapot can void auxSolidTeapot (Gldouble size) to draw, fog color should be set to black)