绘制若干个透明和非透明茶壶，并体现出它们之间正确的混合效果；实现放大镜功能，放大场景中的任意部分； 放大镜可以通过鼠标键盘进行控制；-Draw a number of transparent and non-transparent teapot, and they reflect mixed results magnifying glass feature to enlarge any part of the scene magnifying glass can be controlle

调用OpenGL实现放大镜功能 按键控制， 按 o键实现开启/关闭放大镜功能 按m/n键 : 扩大/缩小放大倍数 源码实现-OpenGL magnifying glass function. O open/close the magnifier function m/n: expansion/reduction magnification source implementation

实现放大镜功能，放大场景中的任意部分 2. 放大镜可以通过鼠标键盘进行控制-Magnifying glass function to enlarge any part of the scene. Magnifying glass through mouse and keyboard control