C++ code from the article "Incremental Delaunay Triangulation" by Dani Lischinski, danix@graphics.cornell.edu in "Graphics Gems IV", Academic Press, 1994 test.C contains an interactive test program for Delaunay triangulation. The program should compile and run on SGI workstations. Use left-mouse to add new points. The rest of the code is more portable (not limited to SGIs).