Copyright (C) 2004 Aaron Titus VPython programs by Aaron Titus email: web: These programs are written in Python and use the Visual module developed by Ruth Chabay, Bruce Sherwood, et. al. (see vpython.org for details) and are licenses under the GNU General Public License. A copy of the GPL license is distributed at the same page as these programs at . These programs are free software; you can redistribute them and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Email Aaron Titus at titus@mailaps.org if you have any questions, comments, or feature requests.