图形学的重要算法，使用鼠标右键操作。包括直线DDA算法，Bresenham算法，OpenGL画法，以及圆，椭圆的画法。三角形的平移、旋转、缩放操作。环境配置在rar的注释里有说明。,The importance of graphics algorithms, using the right mouse button operation. Including linear DDA algorithm, Bresenham algorithm, OpenGL drawing, as well as round, oval of the painting. Triangle of shifting, rotating, zooming operation. Rar environment in the configuration described in the Notes.