DXX-REBIRTH LICENSE ==================== The original Descent source release is copyright by Parallax and subject to the Parallax license below. Contributions from the D1X/D2X ("DXX") and D1X-Rebirth/D2X-Rebirth ("Rebirth") projects are copyright their respective contributors. The DXX and Rebirth contributors grant you permission to convey their work, with or without modifications, pursuant to the terms of the GNU General Public License, version 3 ("GPLv3"). As a special exception, in recognition of the restrictions imposed by the original Parallax license, you are excused from GPLv3 requirements that conflict with the restrictions of the original Parallax license, but only to the extent that such excuse is required to prevent a conflict between the terms of the original Parallax license and the GNU General Public License v3. This special exception is an "Additional permission" as defined by section 7 of the GNU General Public License v3. All provisions of the GPLv3 that can be satisfied without violating the original Parallax license must be satisfied to the greatest extent possible without violating the original Parallax license. Failure to satisfy any non-excused GPLv3 provision is expressly prohibited under this license, and is therefore void and is handled pursuant to GPLv3 section 8 "Termination.", exactly as would occur for a non-permitted propagation or modification of a GPLv3 covered work that had no special exceptions. For purposes of this document, "copyright by Parallax" shall include any subsequent entities to which some or all of the Parallax copyrights were transferred, without regard to how the transfer occurred. In the event that you are permitted to convey the material originally copyright by Parallax under terms other than the original Parallax license below, whether due to a general relicensing by the appropriate copyright holders, due to special permission from the appropriate copyright holders, or any other circumstance, the contributions from the DXX and Rebirth projects remain subject to the GNU General Public License, version 3. The special exception described in the preceding paragraph excuses only conflicts with the original Parallax license. If a subsequent license to the Parallax work conflicts with the GPLv3 in any way that the original Parallax license did not conflict, then such new conflicts are not excused. As detailed in GPLv3 section 12 "No Surrender of Others' Freedom.", if you cannot simultaneously satisfy the non-excused terms of the GPLv3 and all other conditions imposed on you, then you may not convey the GPLv3 covered work at all. Additionally, if you are permitted to convey the material originally copyright by Parallax under terms other than the original Parallax license, and such new permission allows you to comply with the GPLv3 to a greater extent than the original Parallax license allowed, and you convey the covered work or a portion thereof, then such conveyance must comply with all GPLv3 terms which can be satisfied without violating the permission under which you convey the material originally copyright by Parallax. See GPL-3.txt for further details on the GPLv3. For project history and its contributors, please visit the DXX-Rebirth GIT repository at https://github.com/dxx-rebirth/dxx-rebirth/ PARALLAX 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 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED. We make no warranties as to the usability or correctness of this code.