Introduction - If you have any usage issues, please Google them yourself
Program: 1. This program implements the set of letters vertex set of materials 2 realized by the vertex set of digital material set 3 realized by the lighting of all vertices 4 This procedure achieved eight mobile sources 5 ambient light is black. Instructions: Press 1: on/off parallel to the light (off by default) by 2: On/Off point of light (turned on by default) by 3: On/Off spotlight (default off) at 4: On/Off firefly effect (off by default ) by 5: On/Off Material1 (enabled by default) by 6: On/Off Material2 (default off)