license.txt

Copyright (c) 2019-2025, NVIDIA CORPORATION. All rights reserved.
Copyright (c) 2018 Christoph Schied
Copyright (C) 2018 Florian Simon
Copyright (C) 2018 Tobias Zirr
Copyright (c) 2003-2013 Andrey Nazarov
Copyright (c) 1997-2001 Id Software, Inc.

This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.

This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.

Source code is available at the following location: 
    https://github.com/NVIDIA/Q2RTX
    

                    GNU GENERAL PUBLIC LICENSE
                       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The licenses for most software are designed to take away your
freedom to share and change it.  By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users.  This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it.  (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.)  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.

  To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.

  For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have.  You must make sure that they, too, receive or can get the
source code.  And you must show them these terms so they know their
rights.

  We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.

  Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software.  If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.

  Finally, any free program is threatened constantly by software
patents.  We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary.  To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.

  The precise terms and conditions for copying, distribution and
modification follow.

                    GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License.  The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language.  (Hereinafter, translation is included without limitation in
the term "modification".)  Each licensee is addressed as "you".

Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope.  The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.

  1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.

You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.

  2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:

    a) You must cause the modified files to carry prominent notices
    stating that you changed the files and the date of any change.

    b) You must cause any work that you distribute or publish, that in
    whole or in part contains or is derived from the Program or any
    part thereof, to be licensed as a whole at no charge to all third
    parties under the terms of this License.

    c) If the modified program normally reads commands interactively
    when run, you must cause it, when started running for such
    interactive use in the most ordinary way, to print or display an
    announcement including an appropriate copyright notice and a
    notice that there is no warranty (or else, saying that you provide
    a warranty) and that users may redistribute the program under
    these conditions, and telling the user how to view a copy of this
    License.  (Exception: if the Program itself is interactive but
    does not normally print such an announcement, your work based on
    the Program is not required to print an announcement.)

These requirements apply to the modified work as a whole.  If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works.  But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.

Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.

In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.

  3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:

    a) Accompany it with the complete corresponding machine-readable
    source code, which must be distributed under the terms of Sections
    1 and 2 above on a medium customarily used for software interchange; or,

    b) Accompany it with a written offer, valid for at least three
    years, to give any third party, for a charge no more than your
    cost of physically performing source distribution, a complete
    machine-readable copy of the corresponding source code, to be
    distributed under the terms of Sections 1 and 2 above on a medium
    customarily used for software interchange; or,

    c) Accompany it with the information you received as to the offer
    to distribute corresponding source code.  (This alternative is
    allowed only for noncommercial distribution and only if you
    received the program in object code or executable form with such
    an offer, in accord with Subsection b above.)

The source code for a work means the preferred form of the work for
making modifications to it.  For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable.  However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.

If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.

  4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License.  Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.

  5. You are not required to accept this License, since you have not
signed it.  However, nothing else grants you permission to modify or
distribute the Program or its derivative works.  These actions are
prohibited by law if you do not accept this License.  Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.

  6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions.  You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.

  7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all.  For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.

If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.

It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices.  Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.

This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.

  8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded.  In such case, this License incorporates
the limitation as if written in the body of this License.

  9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time.  Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

Each version is given a distinguishing version number.  If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation.  If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.

  10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission.  For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this.  Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.

                            NO WARRANTY

  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.

  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.

                     END OF TERMS AND CONDITIONS



        LIMITED USE SOFTWARE DEMO LICENSE AGREEMENT

This Limited Use Software Demo License Agreement (the "Agreement") is a
legal agreement between you, the end-user, and Id Software, Inc. ("ID").
BY CONTINUING THE INSTALLATION OF THIS GAME PROGRAM ENTITLED QUAKE II,
BY LOADING OR RUNNING THE GAME PROGRAM, OR BY PLACING OR COPYING THE
GAME PROGRAM ONTO YOUR COMPUTER HARD DRIVE, COMPUTER RAM OR OTHER STORAGE,
YOU ARE AGREEING TO BE BOUND BY THE TERMS OF THIS AGREEMENT.

1.  Grant of License.  ID grants to you the non-exclusive limited
    right to use this Id Software game program in executable or
    object code form only (the "Software"), which is the demo
    version of the Software, for non-commercial, recreational
    purposes.  The term "Software" includes all elements of the
    Software such as data files and screen displays.  You are not
    receiving any ownership or proprietary right, title or interest
    in or to the Software or the copyright, trademarks, or other rights
    related thereto.  For purposes of this section, "use" means loading
    the Software into RAM and/or onto computer hard drive, as well as
    installation of the Software on a hard disk or other storage device.

    You agree that the Software will not be shipped, transferred or
    exported into any country in violation of the U.S. Export
    Administration Act (or any other law governing such matters) by you
    or anyone at your direction and that you will not utilize and will not
    authorize anyone to utilize, in any other manner, the Software in
    violation of any applicable law.  The Software may not be downloaded
    or otherwise exported or reexported into (or to a national or resident
    of) any country to which the U.S. has embargoed goods or to anyone or
    into any country who/which are prohibited, by applicable law, from
    receiving such property.

2.  Prohibitions. You, either directly or indirectly, shall not do any of
    the following acts:

    a.  rent the Software;

    b.  sell the Software;

    c.  lease or lend the Software;

    d.  offer the Software on a ?pay-per-play? basis;

    e.  distribute the Software (except by electronic means, as
        permitted by section 3. hereinbelow) by any means,
        including, but not limited to direct mail, retail, mail
        order or other means;

    f.  in any other manner and through any medium whatsoever
        commercially exploit the Software or use the Software
        for any commercial purpose;

    g.  disassemble, reverse engineer, decompile, modify or
        alter the Software;

    h.  translate the Software;

    i.  reproduce or copy the Software (except as permitted by
        section 3. hereinbelow);

    j.  publicly display the Software; or

    k.  prepare or develop derivative works based upon the
        Software.

    3.  Permitted Electronic Distribution and Copying.  So long as this
        Agreement accompanies the Software at all times, ID grants to you
        the limited right to distribute, free of charge and by electronic
        means only, the Software.  Anyone who receives the Software from
        Provider, as defined below, shall be limited to all the terms and
        conditions of this Agreement.  The term "Provider" shall mean an
        enduser who installs a copy of the Software on his/its server and
        allows other endusers to download a copy of the Software from such
        server. You may make only the following copies of the Software:
        (i) you may download the Software from the Internet and onto your
        computer hard drive; (ii) you may copy the Software from your computer
        hard drive into your computer RAM; and (iii) you may make one (1)
        "back up" or archival copy of the Software on one (1) hard disk.

    4.  Copyright.  The Software and all copyrights, trademarks and all other
        conceivable intellectual property rights related to the Software are
        owned by ID and are protected by United States copyright laws,
        international treaty provisions and all applicable law, such as the
        Lanham Act.  You must treat the Software like any other copyrighted
        material, as required by 17 U.S.C., section 101 et seq. and other
        applicable law.  You agree to use your best efforts to see that any
        user of the Software licensed hereunder complies with this Agreement.
        You agree that you are receiving a copy of the Software by license only
        and not by sale and that the "first sale" doctrine of 17 U.S.C. section
        109 does not apply to your receipt or use of the Software.

5.        NO WARRANTIES.  ID DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED,
    INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND
    FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE SOFTWARE.  ID DOES
    NOT WARRANT THAT THE OPERATION OF THE SOFTWARE WILL BE UNINTERRUPTED OR
    ERROR FREE OR THAT THE SOFTWARE WILL MEET YOUR SPECIFIC REQUIREMENTS.
    ADDITIONAL STATEMENTS SUCH AS PRESENTATIONS, WHETHER ORAL OR WRITTEN, DO
    NOT CONSTITUTE WARRANTIES BY ID AND SHOULD NOT BE RELIED UPON.

6.        Venue and Liability Limitation.  This Agreement shall be construed in
    accordance with and governed by the laws of the State of Texas and U.S.
    federal law.  Copyright and other proprietary matters will be governed by
    United States laws and international treaties.  Exclusive venue for all
    litigation regarding this Agreement shall be in Dallas County, Texas and you
    agree to submit to the jurisdiction of the courts in Dallas, Texas for any
    such litigation.  IN ANY CASE, NEITHER ID NOR ID'S OFFICERS, EMPLOYEES,
    DIRECTORS, AGENTS, LICENSEES, SUBLICENSEES, SUCCESSORS OR ASSIGNS SHALL BE
    LIABLE FOR LOSS OF DATA, LOSS OF PROFITS, LOST SAVINGS, SPECIAL, INCIDENTAL,
    CONSEQUENTIAL, INDIRECT, PUNITIVE OR OTHER SIMILAR DAMAGES ARISING FROM
    BREACH OF WARRANTY, BREACH OF CONTRACT, NEGLIGENCE, STRICT PRODUCT
    LIABILITY, OR OTHER LEGAL THEORY EVEN IF ID OR ITS AGENT HAS BEEN ADVISED
    OF THE POSSIBILITY OF SUCH DAMAGES OR EVEN IF SUCH DAMAGES ARE FORESEEABLE,
    OR LIABLE FOR ANY CLAIM BY ANY OTHER PARTY.  Some jurisdictions do not
    allow the exclusion or limitation of incidental or consequential damages,
    so the above limitation or exclusion may not apply to you.

7.        U.S. Government Restricted Rights. To the extent applicable, the United
    States Government shall only have those rights to use the Software as
    expressly stated and expressly limited and restricted in this Agreement,
    as provided in 48 C.F.R. sections 227.7202-1 through 227.7204, inclusive.

8.        General Provisions.  A copy of all notices or other correspondence which
    you send to ID shall also be sent by you to ID's counsel:

D. Wade Cloud, Jr.
HIERSCHE, MARTENS, HAYWARD, DRAKELEY & URBACH, P.C.
15303 Dallas Parkway, Suite 700
Dallas, TX 75248
(972) 701-7000
Facsimile:   (972) 701-8765

Neither this Agreement nor any part or portion hereof shall be assigned or s
ublicensed by you.  ID may assign its rights under this Agreement in ID's sole
discretion.  Should any provision of this Agreement be held to be void, invalid,
unenforceable or illegal by a court, the validity and enforceability of the
other provisions shall not be affected thereby.  If any provision is determined
to be unenforceable, you agree to a modification of such provision to provide
for enforcement of the provision's intent, to the extent permitted by applicable
law.  Failure of ID to enforce any provision of this Agreement shall not
constitute or be construed as a waiver of such provision or of the right to
enforce such provision.  If you fail to comply with any term of this Agreement,
YOUR LICENSE IS AUTOMATICALLY TERMINATED, WITHOUT NOTICE.  In the event this
Agreement is terminated, you shall have no right to use the Software, in any
manner and you shall immediately destroy all copies of the Software in your
possession, custody or control.  You agree that your unauthorized use of any
ID property, whether in whole or in part, would immediately and irreparably
damage ID such that ID could not be adequately compensated by an award of
monetary damages, and in the event of such threatened or actual unauthorized
use ID shall be entitled to an injunctive order appropriately restraining and/or
prohibiting such unauthorized use without the necessity of ID posting bond or
other security.

YOU ACKNOWLEDGE THAT YOU HAVE READ THIS AGREEMENT, YOU UNDERSTAND THIS
AGREEMENT, AND UNDERSTAND THAT BY CONTINUING THE INSTALLATION OF THE SOFTWARE,
BY LOADING OR RUNNING THE SOFTWARE, OR BY PLACING OR COPYING THE SOFTWARE
ONTO YOUR COMPUTER HARD DRIVE OR RAM, YOU AGREE TO BE BOUND BY THE TERMS AND
CONDITIONS OF THIS AGREEMENT.  YOU FURTHER AGREE THAT, EXCEPT FOR WRITTEN
SEPARATE AGREEMENTS BETWEEN ID AND YOU, THIS AGREEMENT IS A COMPLETE AND
EXCLUSIVE STATEMENT OF THE RIGHTS AND LIABILITIES OF THE PARTIES HERETO.
THIS AGREEMENT SUPERSEDES ALL PRIOR ORAL AGREEMENTS, PROPOSALS OR
UNDERSTANDINGS, AND ANY OTHER COMMUNICATIONS BETWEEN ID AND YOU RELATING TO
THE SUBJECT MATTER OF THIS AGREEMENT.


February 16, 1998 (9:22am)