Cuspy is an interactive cubic curve editor for X-Windows that I wrote during a graphics course at the University of Calgary. It was originally my solution to one of the assignments but the instructor, Dr. Prusinkiewicz, liked it and wanted to use it as a tool for his own work. Dr. P works on modelling plants, and he uses the program to define the cross-sections of leaves and stems. He uses other programs to sweep the cross-sections into surfaces that can be passed to renderers.

In response to his request I spruced up the program and removed most of the bugs. The result is available here. Click on the image below to see the full-size screen shot.

Cuspy screenshot

Cuspy is written in C++ and uses Bill Spitzak's excellent FLTK windowing tookkit. Drawing is done using OpenGL and works with the Mesa OpenGL work-alike library. It has been tested under X-Windows on a Pentium running Linux and on an SGI Indigo running their window manager.

The current version of Cuspy is 2.0. This version has been tested on Debian Linux with the latest (as of 2000) versions of FLTK and Mesa.

Known Bugs:

• The current version of Cuspy will sometimes cause the MWM window manager to crash when you exit the program. I don't know what's causing the problem, since Cuspy works just fine under FVWM2.

UPDATE: I am no longer supporting Cuspy because I have moved on to new projects and do not have time for it. In the unlikely event that anyone is actually using this program (Helloooo? Echo... echo...) I encourage them to hire one of their undergrad students to upgrade it to meet their needs.