计算机图形学作业算法 VC++程序源码 含画直线(逐点比较法)、二维裁剪(中点分割算法)、判别点在区域内外(标号法)等算法，经我修改用于保存手动提取图形特征点,Computer graphics algorithms operating VC++ Program source code containing paint a straight line (point by point comparison method), two-dimensional cutting (mid-poin