Original Descent 2 code license: THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE. COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED. We make no warranties as to the usability or correctness of this code. Additional restrictions: Any executable created using files or code taken from this source tree MUST be open source. By using this source, you are agreeing to this term, in the interest of the descent and descent programming communities. The only exception is if the writer of the original source gives explicit permission for the code to be used otherwise. Portions of d2x code are taken from the d1x project. This code is covered by the d1x license, in the file license.txt