This directory contains the C++ program "evert" for turning the sphere
inside out without tears, creases, or pinches. The program was written by Nathaniel Thurston, and is based on ideas of Bill Thurston. Silvio Levy wrote the documentation and organized the distribution.
This software was developed at the Geometry Center (University of Minnesota).
The documentation consists of a Latex file manual.tex, also available in Postscript (manual.ps). It assumes you are familiar with the basic ideas of the algorithm for turning the sphere inside out described in the computer-animated video Outside In. This video, directed by Silvio Levy, Tamara Munzner and Delle Maxwell, gives an elementary description of the eversion, and shows it step by step, from different points of view. You should also consult the full-color illustrated book Making Waves: A Guide to the Ideas Behind Outside In, which comes with the video. Outside In and Making Waves are distributed by
A K Peters
289 Linden Street
Wellesley MA 02181
phone 617-235-2210
fax 617-235-2404
You can also point your favorite Web browser to http://geom.umn.edu/locate/oi.
Comments and questions about this document or the program can be sent to Silvio Levy at [email protected], or to Nathaniel Thurston at [email protected].