2. 在代码中添加光照函数，要求如下：

（1）使用光源1

（2）设置光源的环境光、漫反射光以及镜面反射光颜色

（3）设置光源位置

（4）设置物体材质属性，包括：环境光、漫反射以及镜面反射系数（两个三维对象材质属性不能相同）；对其中一个三维对象设置其表面发射项

-Light function, add code requirements are as follows: (1) the use of the light source 1 (2) Set the light source of ambient light, diffuse, and specular reflection light color (3) to set the position of the light source (4) to set the object material properties, including : ambient, diffuse reflection and specular reflection coefficient (two three-dimensional object material properties can not be the same)　setting its surface-emitting items for which a three-dimensional object