计算机图形学入门，用MFC实现DDA，中点，Bresenham算法画直线-Computer graphics entry, using MFC DDA, the midpoint, Bresenham algorithm for drawing a straight line

mfc中画线的一个小例子，可以完成画线，选颜色，选中、拖动、删除等最基本的功能。-A small example mfc drawing a line, you can complete the painting line, choose the color, select, drag, delete and other basic functions.

mfc制作的简单画图程序 画任意线条，矩形，橡皮擦-MFC produced a simple drawing program Draw line, rectangle, eraser