# Credits

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Project Design

Nicholas Jackiw

Implementation

Nicholas Jackiw, Scott Steketee, Matt Litwin

Engineering Support

Jon Brooks, Scott Johnson, Kirk Swenson

Special Thanks To:

Eugene Klotz

Kendra Lockman

Tawnia Litwin

Andres Marti

Vishakha Parvate

Steven Rasmussen

Doris Schattschneider

Daniel Scher

Nathalie Sinclair

and to all of our many field testers!

Portions of this work were funded by grants from the National Science Foundation to KCP Technologies, Key Curriculum Press, and the Visual Geometry Project at Swarthmore College.

The Geometer’s Sketchpad® and Dynamic Geometry® are registered trademarks of KCP Technologies. The Sketchpad™ and Hot Text™ are trademarks of KCP Technologies.

| Pthreads Win32

This software uses Pthreads-win32, the POSIX Threads Library for Win32. Copyright © 1998 John E. Bossom Copyright © 1999,2006 Pthreads-win32 contributors The pthreads-win32 library and its use are covered under the terms of the GNU Library General Public License. To dynamically link to your own version of the pthreads-win32 dll, place it next to the Sketchpad Application, and name it “pthreadVC2.dll”.

| The GLee Library for OpenGL

This software uses the GLee Library for OpenGL. Copyright (c)2009 Ben Woodhouse All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer as the first lines of this file unmodified. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY BEN WOODHOUSE ``AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BEN WOODHOUSE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.