计算机图形学 画金刚石 用代码实现图形的表达-painting diamond of visual c++ graphics CADandCG OpenGL In computer graphics, scrolling restricted to an upward or downward direction

openGL，计算机图形学，显示一个直角三角形，白色填充。-OpenGL, computer graphics, a right triangle, white fill.

计算机图形学（第四版）（ Computer-graphics-with-OpenGL）插图-Illustration Computer Graphics fourth edition