Bresenham's line algorithm

Bresenham 直線演算法 [布雷森漢姆直線演算法]
http://tw.myblog.yahoo.com/interesting-science/article?mid=328&prev=331&next=326&l=a&fid=31

Bresenham演算法
http://tw.myblog.yahoo.com/interesting-science/article?mid=326&prev=328&next=325&l=a&fid=31

Bresenham's line algorithm
http://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm