Simple and efficient 2D and 3D span clipping algorithms.

Victor J. Duvanenko Ronald S. Gyurcsik W. E. Robbins Simple and efficient 2D and 3D span clipping algorithms. 39-54 1993 17 Computers & Graphics 1 http://dx.doi.org/10.1016/0097-8493(93)90050-J db/journals/cg/cg17.html#DuvanenkoGR93