Introduction - If you have any usage issues, please Google them yourself
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