OpenGl中的二维裁剪算法，实现直线段相对于给定窗口的裁减，主要采用梁友栋－barsky算法，-OpenGl the two-dimensional cutting algorithm, and of the linear phase for a given window of the reduction, used mainly friends of Liang Dong-barsky algorithm,

经典的梁友栋——baskey裁剪算法,线段裁剪，简洁方便-Classic Liang Dong- baskey cutting algorithm, the line cutting, simple and convenient

OpenGL实现的直线裁剪算法，比较简单，梁友栋Barsky裁剪算法-OpenGL, cutting a straight line algorithms is relatively simple, Liang Youdong Barsky clipping algorithm