I have a passion for making pictures, especially moving pictures, especially those which serve to make difficult concepts a little easier.  

The section on "algorithm visualization" describes the result of five years' of development of QuickTime® movies to illustrate algorithms from computational geometry.  Most can be viewed with the QuickTime player; some require the QuickTime Player 7.  There are links on these pages to play the movies, and to download groups of movies as a zipped file.  

The section on "data visualization" describes one project in visualizing data from medical histories.  

At the left:  a frame from the QuickTime movie for a point-in-polygon algorithm:  how to determine in which polygon a point lies.