for Line Clipping", ACM Transactions on Graphics, 3(1):1–22, January 1984. Liang, Y. D., B. A., Barsky, and M. Slater, Some Improvements to a Parametric Line Clipping Algorithm, CSD-92-688, Computer Science Division, University of California, Berkeley, 1992. James D. Foley. Computer graphics: principles and practice. Addison-Wesley Professional, 1996. p. 117. External links http://hinjang.com/articles/04.html#eight Skytopia: The Liang-Barsky line clipping algorithm in a nutshell! Line clipping algorithms