** Blosc; version 1.5.0 -- https://github.com/Blosc/c-blosc
For Blosc - A blocking, shuffling and lossless compression library

Copyright (C) 2009-2018 Francesc Alted <francesc@blosc.org>
Copyright (C) 2019-present Blosc Development team <blosc@blosc.org>

Copyright (C) 2006 by Rob Landley <rob@landley.net>

Permission to use, copy, modify, and/or distribute this software for any
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------

** Audaspace; version 1.3.0 -- https://audaspace.github.io/
** Cuda Wrangler; version cbf465b -- https://github.com/CudaWrangler/cuew
** Draco; version 1.3.6 -- https://google.github.io/draco/
** Embree; version 3.10 -- https://github.com/embree/embree
** Mantaflow; version 0.13 -- http://mantaflow.com/
** oneAPI Threading Building Block; version 2019_U9 --
https://software.intel.com/en-us/oneapi/onetbb
** OpenCL Wrangler; version 27a6867 -- https://github.com/OpenCLWrangler/clew
** OpenImageDenoise; version 1.2.3 -- https://www.openimagedenoise.org/
** OpenXR SDK; version 1.0.8 -- https://khronos.org/openxr
** RangeTree; version 40ebed8aa209 -- https://github.com/ideasman42/rangetree-c
** SDL Extension Wrangler; version 15edf8e --
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------

** OpenJPEG; version 2.3.1 -- https://github.com/uclouvain/openjpeg
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------

** Ceres Solver; version 2.0.0 -- http://ceres-solver.org/
Ceres Solver - A fast non-linear least squares minimizer
Copyright 2016 Google Inc. All rights reserved.
** Curve-Fit-nD; version ddcd5bd -- https://github.com/ideasman42/curve-fit-nd
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------

** AutoPackage; version 1.0 -- http://autopackage.org
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** LZMA SDK; version 4.65 -- https://www.7-zip.org/sdk.html
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** Potrace; version 1.16 -- http://potrace.sourceforge.net/
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   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

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest possible
use to the public, the best way to achieve this is to make it free software
which everyone can redistribute and change under these terms.

To do so, attach the following notices to the program. It is safest to attach
them to the start of each source file to most effectively convey the exclusion
of warranty; and each file should have at least the "copyright" line and a
pointer to where the full notice is found.

<one line to give the program's name and an idea of what it does.>

Copyright (C) <yyyy> <name of author>

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) 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., 51 Franklin
Street, Fifth Floor, Boston, MA 02110-1301 , USA.

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this when it
starts in an interactive mode:

Gnomovision version 69, Copyright (C) year name of author Gnomovision comes
with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
and you are welcome to redistribute it under certain conditions; type `show c'
for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may be
called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your school,
if any, to sign a "copyright disclaimer" for the program, if necessary. Here is
a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.

< signature of Ty Coon > , 1 April 1989 Ty Coon, President of Vice

------

** FFTW; version 3.3.8 -- http://www.fftw.org/
Copyright (c) 2003, 2007-14 Matteo Frigo
Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
** GMP; version 6.2.0 -- https://gmplib.org/
Copyright 1996-2020 Free Software Foundation, Inc.
** OpenAL; version 1.20.1 -- http://openal-soft.org
Copyright (c) 2015, Archontis Politis
Copyright (c) 2019, Christopher Robinson

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.

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

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest possible
use to the public, the best way to achieve this is to make it free software
which everyone can redistribute and change under these terms.

To do so, attach the following notices to the program. It is safest to attach
them to the start of each source file to most effectively convey the exclusion
of warranty; and each file should have at least the "copyright" line and a
pointer to where the full notice is found.

< one line to give the program's name and an idea of what it does. >

Copyright (C) < yyyy > < name of author >

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) 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., 51 Franklin
Street, Fifth Floor, Boston, MA 02110-1301 , USA.

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this when it
starts in an interactive mode:

Gnomovision version 69, Copyright (C) year name of author Gnomovision comes
with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
and you are welcome to redistribute it under certain conditions; type `show c'
for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may be
called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your school,
if any, to sign a "copyright disclaimer" for the program, if necessary. Here is
a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.

< signature of Ty Coon > , 1 April 1989 Ty Coon, President of Vice This General
Public License does not permit incorporating your program into proprietary
programs. If your program is a subroutine library, you may consider it more
useful to permit linking proprietary applications with the library. If this is
what you want to do, use the GNU Lesser General Public License instead of this
License.

------

** miniLZO; version 2.08 -- http://www.oberhumer.com/opensource/lzo/
LZO and miniLZO are Copyright (C) 1996-2014 Markus Franz Xaver Oberhumer
All Rights Reserved.
** The FreeType Project; version 2.10.2 --
https://sourceforge.net/projects/freetype
Copyright (C) 1996-2020 by David Turner, Robert Wilhelm, and Werner Lemberg.
** X Drag and Drop; version 2000-08-08 --
https://freedesktop.org/wiki/Specifications/XDND/
xdnd.c, xdnd.h - C program library for handling the Xdnd protocol
Copyright (C) 1996-2000 Paul Sheer

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.

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

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest possible
use to the public, the best way to achieve this is to make it free software
which everyone can redistribute and change under these terms.

To do so, attach the following notices to the program. It is safest to attach
them to the start of each source file to most effectively convey the exclusion
of warranty; and each file should have at least the "copyright" line and a
pointer to where the full notice is found.

<one line to give the program's name and an idea of what it does.>

Copyright (C) <yyyy> <name of author>

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) 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., 51 Franklin
Street, Fifth Floor, Boston, MA 02110-1301 , USA.

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this when it
starts in an interactive mode:

Gnomovision version 69, Copyright (C) year name of author Gnomovision comes
with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
and you are welcome to redistribute it under certain conditions; type `show c'
for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may be
called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your school,
if any, to sign a "copyright disclaimer" for the program, if necessary. Here is
a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.

< signature of Ty Coon > , 1 April 1989 Ty Coon, President of Vice This General
Public License does not permit incorporating your program into proprietary
programs. If your program is a subroutine library, you may consider it more
useful to permit linking proprietary applications with the library. If this is
what you want to do, use the GNU Lesser General Public License instead of this
License.

------

** Eigen, template library for linear algebra: matrices, vectors, numerical
solvers, and related algorithms; version 3.2.7 --
http://eigen.tuxfamily.org/index.php?title=Main_Page
This file is part of Eigen, a lightweight C++ template library for linear
algebra.
** Free Spacenav; version 0.2.3 --
http://downloads.sourceforge.net/project/spacenav
Copyright (C) 2007-2019 John Tsiombikas <nuclear@member.fsf.org>

GNU GENERAL PUBLIC LICENSE

Version 3, 29 June 2007

Copyright © 2007 Free Software Foundation, Inc. <http s ://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this license
document, but changing it is not allowed.

Preamble

The GNU General Public License is a free, copyleft license for software and
other kinds of works.

The licenses for most software and other practical works are designed to take
away your freedom to share and change the works. By contrast, the GNU General
Public License is intended to guarantee your freedom to share and change all
versions of a program--to make sure it remains free software for all its users.
We, the Free Software Foundation, use the GNU General Public License for most
of our software; it applies also to any other work released this way by its
authors. 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 them 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 prevent others from denying you these rights
or asking you to surrender the rights. Therefore, you have certain
responsibilities if you distribute copies of the software, or if you modify it:
responsibilities to respect the freedom of others.

For example, if you distribute copies of such a program, whether gratis or for
a fee, you must pass on to the recipients the same freedoms that you received.
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.

Developers that use the GNU GPL protect your rights with two steps: (1) assert
copyright on the software, and (2) offer you this License giving you legal
permission to copy, distribute and/or modify it.

For the developers' and authors' protection, the GPL clearly explains that
there is no warranty for this free software. For both users' and authors' sake,
the GPL requires that modified versions be marked as changed, so that their
problems will not be attributed erroneously to authors of previous versions.

Some devices are designed to deny users access to install or run modified
versions of the software inside them, although the manufacturer can do so. This
is fundamentally incompatible with the aim of protecting users' freedom to
change the software. The systematic pattern of such abuse occurs in the area of
products for individuals to use, which is precisely where it is most
unacceptable. Therefore, we have designed this version of the GPL to prohibit
the practice for those products. If such problems arise substantially in other
domains, we stand ready to extend this provision to those domains in future
versions of the GPL, as needed to protect the freedom of users.

Finally, every program is threatened constantly by software patents. States
should not allow patents to restrict development and use of software on
general-purpose computers, but in those that do, we wish to avoid the special
danger that patents applied to a free program could make it effectively
proprietary. To prevent this, the GPL assures that patents cannot be used to
render the program non-free.

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

TERMS AND CONDITIONS

   0. Definitions.

   "This License" refers to version 3 of the GNU General Public License.

   "Copyright" also means copyright-like laws that apply to other kinds of
   works, such as semiconductor masks.

   "The Program" refers to any copyrightable work licensed under this License.
   Each licensee is addressed as "you". "Licensees" and "recipients" may be
   individuals or organizations.

   To "modify" a work means to copy from or adapt all or part of the work in a
   fashion requiring copyright permission, other than the making of an exact
   copy. The resulting work is called a "modified version" of the earlier work
   or a work "based on" the earlier work.

   A "covered work" means either the unmodified Program or a work based on the
   Program.

   To "propagate" a work means to do anything with it that, without permission,
   would make you directly or secondarily liable for infringement under
   applicable copyright law, except executing it on a computer or modifying a
   private copy. Propagation includes copying, distribution (with or without
   modification), making available to the public, and in some countries other
   activities as well.

   To "convey" a work means any kind of propagation that enables other parties
   to make or receive copies. Mere interaction with a user through a computer
   network, with no transfer of a copy, is not conveying.

   An interactive user interface displays "Appropriate Legal Notices" to the
   extent that it includes a convenient and prominently visible feature that
   (1) displays an appropriate copyright notice, and (2) tells the user that
   there is no warranty for the work (except to the extent that warranties are
   provided), that licensees may convey the work under this License, and how to
   view a copy of this License. If the interface presents a list of user
   commands or options, such as a menu, a prominent item in the list meets this
   criterion.

   1. Source Code.

   The "source code" for a work means the preferred form of the work for making
   modifications to it. "Object code" means any non-source form of a work.

   A "Standard Interface" means an interface that either is an official
   standard defined by a recognized standards body, or, in the case of
   interfaces specified for a particular programming language, one that is
   widely used among developers working in that language.

   The "System Libraries" of an executable work include anything, other than
   the work as a whole, that (a) is included in the normal form of packaging a
   Major Component, but which is not part of that Major Component, and (b)
   serves only to enable use of the work with that Major Component, or to
   implement a Standard Interface for which an implementation is available to
   the public in source code form. A "Major Component", in this context, means
   a major essential component (kernel, window system, and so on) of the
   specific operating system (if any) on which the executable work runs, or a
   compiler used to produce the work, or an object code interpreter used to run
   it.

   The "Corresponding Source" for a work in object code form means all the
   source code needed to generate, install, and (for an executable work) run
   the object code and to modify the work, including scripts to control those
   activities. However, it does not include the work's System Libraries, or
   general-purpose tools or generally available free programs which are used
   unmodified in performing those activities but which are not part of the
   work. For example, Corresponding Source includes interface definition files
   associated with source files for the work, and the source code for shared
   libraries and dynamically linked subprograms that the work is specifically
   designed to require, such as by intimate data communication or control flow
   between those subprograms and other parts of the work.

   The Corresponding Source need not include anything that users can regenerate
   automatically from other parts of the Corresponding Source.

   The Corresponding Source for a work in source code form is that same work.

   2. Basic Permissions.

   All rights granted under this License are granted for the term of copyright
   on the Program, and are irrevocable provided the stated conditions are met.
   This License explicitly affirms your unlimited permission to run the
   unmodified Program. The output from running a covered work is covered by
   this License only if the output, given its content, constitutes a covered
   work. This License acknowledges your rights of fair use or other equivalent,
   as provided by copyright law.

   You may make, run and propagate covered works that you do not convey,
   without conditions so long as your license otherwise remains in force. You
   may convey covered works to others for the sole purpose of having them make
   modifications exclusively for you, or provide you with facilities for
   running those works, provided that you comply with the terms of this License
   in conveying all material for which you do not control copyright. Those thus
   making or running the covered works for you must do so exclusively on your
   behalf, under your direction and control, on terms that prohibit them from
   making any copies of your copyrighted material outside their relationship
   with you.

   Conveying under any other circumstances is permitted solely under the
   conditions stated below. Sublicensing is not allowed; section 10 makes it
   unnecessary.

   3. Protecting Users' Legal Rights From Anti-Circumvention Law.

   No covered work shall be deemed part of an effective technological measure
   under any applicable law fulfilling obligations under article 11 of the WIPO
   copyright treaty adopted on 20 December 1996, or similar laws prohibiting or
   restricting circumvention of such measures.

   When you convey a covered work, you waive any legal power to forbid
   circumvention of technological measures to the extent such circumvention is
   effected by exercising rights under this License with respect to the covered
   work, and you disclaim any intention to limit operation or modification of
   the work as a means of enforcing, against the work's users, your or third
   parties' legal rights to forbid circumvention of technological measures.

   4. Conveying Verbatim Copies.

   You may convey 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; keep intact all notices
   stating that this License and any non-permissive terms added in accord with
   section 7 apply to the code; keep intact all notices of the absence of any
   warranty; and give all recipients a copy of this License along with the
   Program.

   You may charge any price or no price for each copy that you convey, and you
   may offer support or warranty protection for a fee.

   5. Conveying Modified Source Versions.

   You may convey a work based on the Program, or the modifications to produce
   it from the Program, in the form of source code under the terms of section
   4, provided that you also meet all of these conditions:

      a) The work must carry prominent notices stating that you modified it,
      and giving a relevant date.

      b) The work must carry prominent notices stating that it is released
      under this License and any conditions added under section 7. This
      requirement modifies the requirement in section 4 to "keep intact all
      notices".

      c) You must license the entire work, as a whole, under this License to
      anyone who comes into possession of a copy. This License will therefore
      apply, along with any applicable section 7 additional terms, to the whole
      of the work, and all its parts, regardless of how they are packaged. This
      License gives no permission to license the work in any other way, but it
      does not invalidate such permission if you have separately received it.

      d) If the work has interactive user interfaces, each must display
      Appropriate Legal Notices; however, if the Program has interactive
      interfaces that do not display Appropriate Legal Notices, your work need
      not make them do so.

   A compilation of a covered work with other separate and independent works,
   which are not by their nature extensions of the covered work, and which are
   not combined with it such as to form a larger program, in or on a volume of
   a storage or distribution medium, is called an "aggregate" if the
   compilation and its resulting copyright are not used to limit the access or
   legal rights of the compilation's users beyond what the individual works
   permit. Inclusion of a covered work in an aggregate does not cause this
   License to apply to the other parts of the aggregate.

   6. Conveying Non-Source Forms.

   You may convey a covered work in object code form under the terms of
   sections 4 and 5, provided that you also convey the machine-readable
   Corresponding Source under the terms of this License, in one of these ways:

      a) Convey the object code in, or embodied in, a physical product
      (including a physical distribution medium), accompanied by the
      Corresponding Source fixed on a durable physical medium customarily used
      for software interchange.

      b) Convey the object code in, or embodied in, a physical product
      (including a physical distribution medium), accompanied by a written
      offer, valid for at least three years and valid for as long as you offer
      spare parts or customer support for that product model, to give anyone
      who possesses the object code either (1) a copy of the Corresponding
      Source for all the software in the product that is covered by this
      License, on a durable physical medium customarily used for software
      interchange, for a price no more than your reasonable cost of physically
      performing this conveying of source, or (2) access to copy the
      Corresponding Source from a network server at no charge.

      c) Convey individual copies of the object code with a copy of the written
      offer to provide the Corresponding Source. This alternative is allowed
      only occasionally and noncommercially, and only if you received the
      object code with such an offer, in accord with subsection 6b.

      d) Convey the object code by offering access from a designated place
      (gratis or for a charge), and offer equivalent access to the
      Corresponding Source in the same way through the same place at no further
      charge. You need not require recipients to copy the Corresponding Source
      along with the object code. If the place to copy the object code is a
      network server, the Corresponding Source may be on a different server
      (operated by you or a third party) that supports equivalent copying
      facilities, provided you maintain clear directions next to the object
      code saying where to find the Corresponding Source. Regardless of what
      server hosts the Corresponding Source, you remain obligated to ensure
      that it is available for as long as needed to satisfy these requirements.

      e) Convey the object code using peer-to-peer transmission, provided you
      inform other peers where the object code and Corresponding Source of the
      work are being offered to the general public at no charge under
      subsection 6d.

   A separable portion of the object code, whose source code is excluded from
   the Corresponding Source as a System Library, need not be included in
   conveying the object code work.

   A "User Product" is either (1) a "consumer product", which means any
   tangible personal property which is normally used for personal, family, or
   household purposes, or (2) anything designed or sold for incorporation into
   a dwelling. In determining whether a product is a consumer product, doubtful
   cases shall be resolved in favor of coverage. For a particular product
   received by a particular user, "normally used" refers to a typical or common
   use of that class of product, regardless of the status of the particular
   user or of the way in which the particular user actually uses, or expects or
   is expected to use, the product. A product is a consumer product regardless
   of whether the product has substantial commercial, industrial or
   non-consumer uses, unless such uses represent the only significant mode of
   use of the product.

   "Installation Information" for a User Product means any methods, procedures,
   authorization keys, or other information required to install and execute
   modified versions of a covered work in that User Product from a modified
   version of its Corresponding Source. The information must suffice to ensure
   that the continued functioning of the modified object code is in no case
   prevented or interfered with solely because modification has been made.

   If you convey an object code work under this section in, or with, or
   specifically for use in, a User Product, and the conveying occurs as part of
   a transaction in which the right of possession and use of the User Product
   is transferred to the recipient in perpetuity or for a fixed term
   (regardless of how the transaction is characterized), the Corresponding
   Source conveyed under this section must be accompanied by the Installation
   Information. But this requirement does not apply if neither you nor any
   third party retains the ability to install modified object code on the User
   Product (for example, the work has been installed in ROM).

   The requirement to provide Installation Information does not include a
   requirement to continue to provide support service, warranty, or updates for
   a work that has been modified or installed by the recipient, or for the User
   Product in which it has been modified or installed. Access to a network may
   be denied when the modification itself materially and adversely affects the
   operation of the network or violates the rules and protocols for
   communication across the network.

   Corresponding Source conveyed, and Installation Information provided, in
   accord with this section must be in a format that is publicly documented
   (and with an implementation available to the public in source code form),
   and must require no special password or key for unpacking, reading or
   copying.

   7. Additional Terms.

   "Additional permissions" are terms that supplement the terms of this License
   by making exceptions from one or more of its conditions. Additional
   permissions that are applicable to the entire Program shall be treated as
   though they were included in this License, to the extent that they are valid
   under applicable law. If additional permissions apply only to part of the
   Program, that part may be used separately under those permissions, but the
   entire Program remains governed by this License without regard to the
   additional permissions.

   When you convey a copy of a covered work, you may at your option remove any
   additional permissions from that copy, or from any part of it. (Additional
   permissions may be written to require their own removal in certain cases
   when you modify the work.) You may place additional permissions on material,
   added by you to a covered work, for which you have or can give appropriate
   copyright permission.

   Notwithstanding any other provision of this License, for material you add to
   a covered work, you may (if authorized by the copyright holders of that
   material) supplement the terms of this License with terms:

      a) Disclaiming warranty or limiting liability differently from the terms
      of sections 15 and 16 of this License; or

      b) Requiring preservation of specified reasonable legal notices or author
      attributions in that material or in the Appropriate Legal Notices
      displayed by works containing it; or

      c) Prohibiting misrepresentation of the origin of that material, or
      requiring that modified versions of such material be marked in reasonable
      ways as different from the original version; or

      d) Limiting the use for publicity purposes of names of licensors or
      authors of the material; or

      e) Declining to grant rights under trademark law for use of some trade
      names, trademarks, or service marks; or

      f) Requiring indemnification of licensors and authors of that material by
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------

** FFmpeg; version 4.2.3 -- http://ffmpeg.org/
-

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   Library or its derivative works. These actions are prohibited by law if you
   do not accept this License. Therefore, by modifying or distributing the
   Library (or any work based on the Library), you indicate your acceptance of
   this License to do so, and all its terms and conditions for copying,
   distributing or modifying the Library or works based on it.

   10. Each time you redistribute the Library (or any work based on the
   Library), the recipient automatically receives a license from the original
   licensor to copy, distribute, link with or modify the Library 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 with this License.

   11. 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 Library at all. For example, if a patent license would not permit
   royalty-free redistribution of the Library 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
   Library.

   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.

   12. If the distribution and/or use of the Library is restricted in certain
   countries either by patents or by copyrighted interfaces, the original
   copyright holder who places the Library 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.

   13. The Free Software Foundation may publish revised and/or new versions of
   the Lesser 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 Library
   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 Library does not specify a license version
   number, you may choose any version ever published by the Free Software
   Foundation.

   14. If you wish to incorporate parts of the Library into other free programs
   whose distribution conditions are incompatible with these, 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

   15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR
   THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
   OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
   PROVIDE THE LIBRARY "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 LIBRARY IS WITH YOU. SHOULD THE LIBRARY
   PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
   CORRECTION.

   16. 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 LIBRARY 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 LIBRARY (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 LIBRARY TO OPERATE WITH ANY OTHER
   SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
   POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Libraries

If you develop a new library, and you want it to be of the greatest possible
use to the public, we recommend making it free software that everyone can
redistribute and change. You can do so by permitting redistribution under these
terms (or, alternatively, under the terms of the ordinary General Public
License).

To apply these terms, attach the following notices to the library. It is safest
to attach them to the start of each source file to most effectively convey the
exclusion of warranty; and each file should have at least the "copyright" line
and a pointer to where the full notice is found.

<one line to give the library's name and an idea of what it does.>

Copyright (C) <year> <name of author>

This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 2.1 of the License, or (at your option) any
later version.

This library 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this library; if not, write to the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Also add information on how to contact you by electronic and paper mail.

You should also get your employer (if you work as a programmer) or your school,
if any, to sign a "copyright disclaimer" for the library, if necessary. Here is
a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright interest in

the library `Frob' (a library for tweaking knobs) written

by James Random Hacker.

< signature of Ty Coon > , 1 April 1990

Ty Coon, President of Vice

That's all there is to it!

------

** Libsndfile; version 1.0.28 -- http://www.mega-nerd.com/libsndfile/
Copyright (C) 2011-2016 Erik de Castro Lopo <erikd@mega-nerd.com>

GNU LESSER GENERAL PUBLIC LICENSE

Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <http s ://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this license
document, but changing it is not allowed.

This version of the GNU Lesser General Public License incorporates the terms
and conditions of version 3 of the GNU General Public License, supplemented by
the additional permissions listed below.

   0. Additional Definitions.

      As used herein, "this License" refers to version 3 of the GNU Lesser
      General Public License, and the "GNU GPL" refers to version 3 of the GNU
      General Public License.

      "The Library" refers to a covered work governed by this License, other
      than an Application or a Combined Work as defined below.

      An "Application" is any work that makes use of an interface provided by
      the Library, but which is not otherwise based on the Library. Defining a
      subclass of a class defined by the Library is deemed a mode of using an
      interface provided by the Library.

      A "Combined Work" is a work produced by combining or linking an
      Application with the Library. The particular version of the Library with
      which the Combined Work was made is also called the "Linked Version".

      The "Minimal Corresponding Source" for a Combined Work means the
      Corresponding Source for the Combined Work, excluding any source code for
      portions of the Combined Work that, considered in isolation, are based on
      the Application, and not on the Linked Version.

      The "Corresponding Application Code" for a Combined Work means the object
      code and/or source code for the Application, including any data and
      utility programs needed for reproducing the Combined Work from the
      Application, but excluding the System Libraries of the Combined Work.

   1. Exception to Section 3 of the GNU GPL.

   You may convey a covered work under sections 3 and 4 of this License without
   being bound by section 3 of the GNU GPL.

   2. Conveying Modified Versions.

   If you modify a copy of the Library, and, in your modifications, a facility
   refers to a function or data to be supplied by an Application that uses the
   facility (other than as an argument passed when the facility is invoked),
   then you may convey a copy of the modified version:

      a) under this License, provided that you make a good faith effort to
      ensure that, in the event an Application does not supply the function or
      data, the facility still operates, and performs whatever part of its
      purpose remains meaningful, or

      b) under the GNU GPL, with none of the additional permissions of this
      License applicable to that copy.

   3. Object Code Incorporating Material from Library Header Files.

   The object code form of an Application may incorporate material from a
   header file that is part of the Library. You may convey such object code
   under terms of your choice, provided that, if the incorporated material is
   not limited to numerical parameters, data structure layouts and accessors,
   or small macros, inline functions and templates (ten or fewer lines in
   length), you do both of the following:

      a) Give prominent notice with each copy of the object code that the
      Library is used in it and that the Library and its use are covered by
      this License.

      b) Accompany the object code with a copy of the GNU GPL and this license
      document.

   4. Combined Works.

   You may convey a Combined Work under terms of your choice that, taken
   together, effectively do not restrict modification of the portions of the
   Library contained in the Combined Work and reverse engineering for debugging
   such modifications, if you also do each of the following:

      a) Give prominent notice with each copy of the Combined Work that the
      Library is used in it and that the Library and its use are covered by
      this License.

      b) Accompany the Combined Work with a copy of the GNU GPL and this
      license document.

      c) For a Combined Work that displays copyright notices during execution,
      include the copyright notice for the Library among these notices, as well
      as a reference directing the user to the copies of the GNU GPL and this
      license document.

      d) Do one of the following:

         0) Convey the Minimal Corresponding Source under the terms of this
         License, and the Corresponding Application Code in a form suitable
         for, and under terms that permit, the user to recombine or relink the
         Application with a modified version of the Linked Version to produce a
         modified Combined Work, in the manner specified by section 6 of the
         GNU GPL for conveying Corresponding Source.

         1) Use a suitable shared library mechanism for linking with the
         Library. A suitable mechanism is one that (a) uses at run time a copy
         of the Library already present on the user's computer system, and (b)
         will operate properly with a modified version of the Library that is
         interface-compatible with the Linked Version.

      e) Provide Installation Information, but only if you would otherwise be
      required to provide such information under section 6 of the GNU GPL, and
      only to the extent that such information is necessary to install and
      execute a modified version of the Combined Work produced by recombining
      or relinking the Application with a modified version of the Linked
      Version. (If you use option 4d0, the Installation Information must
      accompany the Minimal Corresponding Source and Corresponding Application
      Code. If you use option 4d1, you must provide the Installation
      Information in the manner specified by section 6 of the GNU GPL for
      conveying Corresponding Source.)

   5. Combined Libraries.

   You may place library facilities that are a work based on the Library side
   by side in a single library together with other library facilities that are
   not Applications and are not covered by this License, and convey such a
   combined library under terms of your choice, if you do both of the
   following:

      a) Accompany the combined library with a copy of the same work based on
      the Library, uncombined with any other library facilities, conveyed under
      the terms of this License.

      b) Give prominent notice with the combined library that part of it is a
      work based on the Library, and explaining where to find the accompanying
      uncombined form of the same work.

   6. Revised Versions of the GNU Lesser General Public License.

   The Free Software Foundation may publish revised and/or new versions of the
   GNU Lesser 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 Library as you
   received it specifies that a certain numbered version of the GNU Lesser
   General Public License "or any later version" applies to it, you have the
   option of following the terms and conditions either of that published
   version or of any later version published by the Free Software Foundation.
   If the Library as you received it does not specify a version number of the
   GNU Lesser General Public License, you may choose any version of the GNU
   Lesser General Public License ever published by the Free Software
   Foundation.

   If the Library as you received it specifies that a proxy can decide whether
   future versions of the GNU Lesser General Public License shall apply, that
   proxy's public statement of acceptance of any version is permanent
   authorization for you to choose that version for the Library.

------

** LIBPNG; version 1.6.37 -- http://prdownloads.sourceforge.net/libpng
* Copyright (c) 1995-2019 The PNG Reference Library Authors.
 * Copyright (c) 2018-2019 Cosmin Truta.
 * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson.
 * Copyright (c) 1996-1997 Andreas Dilger.
 * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.

This copy of the libpng notices is provided for your convenience. In case of
any discrepancy between this copy and the notices in the file png.h that is
included in the libpng distribution, the latter shall prevail.

COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:

If you modify libpng you may insert additional notices immediately following
this sentence.

This code is released under the libpng license.

libpng versions 1.2.6, August 15, 2004, through 1.4.5, December 9, 2010, are
Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are distributed
according to the same disclaimer and license as libpng-1.2.5 with the following
individual added to the list of Contributing Authors

Cosmin Truta

libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are

Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are distributed according to
the same disclaimer and license as libpng-1.0.6 with the following individuals
added to the list of Contributing Authors

Simon-Pierre Cadieux

Eric S. Raymond

Gilles Vollant

and with the following additions to the disclaimer:

There is no warranty against interference with your enjoyment of the library or
against infringement. There is no warranty that our efforts or the library will
fulfill any of your particular purposes or needs. This library is provided with
all faults, and the entire risk of satisfactory quality, performance, accuracy,
and effort is with the user.

libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are

Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are distributed according
to the same disclaimer and license as libpng-0.96, with the following
individuals added to the list of Contributing Authors:

Tom Lane

Glenn Randers-Pehrson

Willem van Schaik

libpng versions 0.89, June 1996, through 0.96, May 1997, are

Copyright (c) 1996, 1997 Andreas Digger

Distributed according to the same disclaimer and license as libpng-0.88, with
the following individuals added to the list of Contributing Authors:

John Bowler

Kevin Bracey

Sam Bushell

Magnus Holmgren

Greg Roelofs

Tom Tanner

libpng versions 0.5, May 1995, through 0.88, January 1996, are

Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.

For the purposes of this copyright and license, "Contributing Authors" is
defined as the following set of individuals:

Andreas Dilger

Dave Martindale

Guy Eric Schalnat

Paul Schmidt

Tim Wegner

The PNG Reference Library is supplied "AS IS". The Contributing Authors and
Group 42, Inc. disclaim all warranties, expressed or implied, including,
without limitation, the warranties of merchantability and of fitness for any
purpose. The Contributing Authors and Group 42, Inc. assume no liability for
direct, indirect, incidental, special, exemplary, or consequential damages,
which may result from the use of the PNG Reference Library, even if advised of
the possibility of such damage.

Permission is hereby granted to use, copy, modify, and distribute this source
code, or portions hereof, for any purpose, without fee, subject to the
following restrictions:

   1. The origin of this source code must not be misrepresented.

   2. Altered versions must be plainly marked as such and must not be
   misrepresented as being the original source.

   3. This Copyright notice may not be removed or altered from any source or
   altered source distribution.

The Contributing Authors and Group 42, Inc. specifically permit, without fee,
and encourage the use of this source code as a component to supporting the PNG
file format in commercial products. If you use this source code in a product,
acknowledgment is not required but would be appreciated.

A "png_get_copyright" function is available, for convenient use in "about"
boxes and the like:

printf("%s",png_get_copyright(NULL));

Also, the PNG logo (in PNG format, of course) is supplied in the files
"pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).

Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
certification mark of the Open Source Initiative.

Glenn Randers-Pehrson

glennrp at users.sourceforge.net

December 9, 2010

------

** Libxml2; version 2.9.10 -- http://xmlsoft.org/
Copyright (C) 1998-2012 Daniel Veillard.  All Rights Reserved.
** Mesa 3D; version 18.3.1 -- https://www.mesa3d.org/
Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
** OPENCollada; version 1.6.68 -- https://github.com/KhronosGroup/OpenCOLLADA
Copyright (c) 2008-2009 NetAllied Systems GmbH
** PugiXML; version 1.10 -- http://pugixml.org/
Copyright (c) 2006-2020 Arseny Kapoulkine
** QuadriFlow; version 27a6867 -- https://github.com/hjwdzh/QuadriFlow
Copyright (c) 2018 Jingwei Huang, Yichao Zhou, Matthias Niessner,
Jonathan Shewchuk and Leonidas Guibas. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

------

** NanoVDB; version e62f7a0bf1e27397223c61ddeaaf57edf111b77f --
https://github.com/AcademySoftwareFoundation/openvdb
Copyright Contributors to the OpenVDB Project
** OpenVDB; version 7.0.0 -- http://www.openvdb.org/
Copyright Contributors to the OpenVDB Project

Mozilla Public License Version 2.0

   1. Definitions

      1.1. "Contributor" means each individual or legal entity that creates,
      contributes to the creation of, or owns Covered Software.

      1.2. "Contributor Version" means the combination of the Contributions of
      others (if any) used by a Contributor and that particular Contributor's
      Contribution.

      1.3. "Contribution" means Covered Software of a particular Contributor.

      1.4. "Covered Software" means Source Code Form to which the initial
      Contributor has attached the notice in Exhibit A, the Executable Form of
      such Source Code Form, and Modifications of such Source Code Form, in
      each case including portions thereof.

      1.5. "Incompatible With Secondary Licenses" means

         (a) that the initial Contributor has attached the notice described in
         Exhibit B to the Covered Software; or

         (b) that the Covered Software was made available under the terms of
         version 1.1 or earlier of the License, but not also under the terms of
         a Secondary License.

      1.6. "Executable Form" means any form of the work other than Source Code
      Form.

      1.7. "Larger Work" means a work that combines Covered Software with other
      material, in a separate file or files, that is not Covered Software.

      1.8. "License" means this document.

      1.9. "Licensable" means having the right to grant, to the maximum extent
      possible, whether at the time of the initial grant or subsequently, any
      and all of the rights conveyed by this License.

      1.10. "Modifications" means any of the following:

         (a) any file in Source Code Form that results from an addition to,
         deletion from, or modification of the contents of Covered Software; or

         (b) any new file in Source Code Form that contains any Covered
         Software.

      1.11. "Patent Claims" of a Contributor means any patent claim(s),
      including without limitation, method, process, and apparatus claims, in
      any patent Licensable by such Contributor that would be infringed, but
      for the grant of the License, by the making, using, selling, offering for
      sale, having made, import, or transfer of either its Contributions or its
      Contributor Version.

      1.12. "Secondary License" means either the GNU General Public License,
      Version 2.0, the GNU Lesser General Public License, Version 2.1, the GNU
      Affero General Public License, Version 3.0, or any later versions of
      those licenses.

      1.13. "Source Code Form" means the form of the work preferred for making
      modifications.

      1.14. "You" (or "Your") means an individual or a legal entity exercising
      rights under this License. For legal entities, "You" includes any entity
      that controls, is controlled by, or is under common control with You. For
      purposes of this definition, "control" means (a) the power, direct or
      indirect, to cause the direction or management of such entity, whether by
      contract or otherwise, or (b) ownership of more than fifty percent (50%)
      of the outstanding shares or beneficial ownership of such entity.

   2. License Grants and Conditions

      2.1. Grants

      Each Contributor hereby grants You a world-wide, royalty-free,
      non-exclusive license:

         (a) under intellectual property rights (other than patent or
         trademark) Licensable by such Contributor to use, reproduce, make
         available, modify, display, perform, distribute, and otherwise exploit
         its Contributions, either on an unmodified basis, with Modifications,
         or as part of a Larger Work; and

         (b) under Patent Claims of such Contributor to make, use, sell, offer
         for sale, have made, import, and otherwise transfer either its
         Contributions or its Contributor Version.

      2.2. Effective Date

      The licenses granted in Section 2.1 with respect to any Contribution
      become effective for each Contribution on the date the Contributor first
      distributes such Contribution.

      2.3. Limitations on Grant Scope

      The licenses granted in this Section 2 are the only rights granted under
      this License. No additional rights or licenses will be implied from the
      distribution or licensing of Covered Software under this License.
      Notwithstanding Section 2.1(b) above, no patent license is granted by a
      Contributor:

         (a) for any code that a Contributor has removed from Covered Software;
         or

         (b) for infringements caused by: (i) Your and any other third party's
         modifications of Covered Software, or (ii) the combination of its
         Contributions with other software (except as part of its Contributor
         Version); or

         (c) under Patent Claims infringed by Covered Software in the absence
         of its Contributions.

      This License does not grant any rights in the trademarks, service marks,
      or logos of any Contributor (except as may be necessary to comply with
      the notice requirements in Section 3.4).

      2.4. Subsequent Licenses

      No Contributor makes additional grants as a result of Your choice to
      distribute the Covered Software under a subsequent version of this
      License (see Section 10.2) or under the terms of a Secondary License (if
      permitted under the terms of Section 3.3).

      2.5. Representation

      Each Contributor represents that the Contributor believes its
      Contributions are its original creation(s) or it has sufficient rights to
      grant the rights to its Contributions conveyed by this License.

      2.6. Fair Use

      This License is not intended to limit any rights You have under
      applicable copyright doctrines of fair use, fair dealing, or other
      equivalents.

      2.7. Conditions

      Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
      Section 2.1.

   3. Responsibilities

      3.1. Distribution of Source Form

      All distribution of Covered Software in Source Code Form, including any
      Modifications that You create or to which You contribute, must be under
      the terms of this License. You must inform recipients that the Source
      Code Form of the Covered Software is governed by the terms of this
      License, and how they can obtain a copy of this License. You may not
      attempt to alter or restrict the recipients' rights in the Source Code
      Form.

      3.2. Distribution of Executable Form

      If You distribute Covered Software in Executable Form then:

         (a) such Covered Software must also be made available in Source Code
         Form, as described in Section 3.1, and You must inform recipients of
         the Executable Form how they can obtain a copy of such Source Code
         Form by reasonable means in a timely manner, at a charge no more than
         the cost of distribution to the recipient; and

         (b) You may distribute such Executable Form under the terms of this
         License, or sublicense it under different terms, provided that the
         license for the Executable Form does not attempt to limit or alter the
         recipients' rights in the Source Code Form under this License.

      3.3. Distribution of a Larger Work

      You may create and distribute a Larger Work under terms of Your choice,
      provided that You also comply with the requirements of this License for
      the Covered Software. If the Larger Work is a combination of Covered
      Software with a work governed by one or more Secondary Licenses, and the
      Covered Software is not Incompatible With Secondary Licenses, this
      License permits You to additionally distribute such Covered Software
      under the terms of such Secondary License(s), so that the recipient of
      the Larger Work may, at their option, further distribute the Covered
      Software under the terms of either this License or such Secondary
      License(s).

      3.4. Notices

      You may not remove or alter the substance of any license notices
      (including copyright notices, patent notices, disclaimers of warranty, or
      limitations of liability) contained within the Source Code Form of the
      Covered Software, except that You may alter any license notices to the
      extent required to remedy known factual inaccuracies.

      3.5. Application of Additional Terms

      You may choose to offer, and to charge a fee for, warranty, support,
      indemnity or liability obligations to one or more recipients of Covered
      Software. However, You may do so only on Your own behalf, and not on
      behalf of any Contributor. You must make it absolutely clear that any
      such warranty, support, indemnity, or liability obligation is offered by
      You alone, and You hereby agree to indemnify every Contributor for any
      liability incurred by such Contributor as a result of warranty, support,
      indemnity or liability terms You offer. You may include additional
      disclaimers of warranty and limitations of liability specific to any
      jurisdiction.

   4. Inability to Comply Due to Statute or Regulation

   If it is impossible for You to comply with any of the terms of this License
   with respect to some or all of the Covered Software due to statute, judicial
   order, or regulation then You must: (a) comply with the terms of this
   License to the maximum extent possible; and (b) describe the limitations and
   the code they affect. Such description must be placed in a text file
   included with all distributions of the Covered Software under this License.
   Except to the extent prohibited by statute or regulation, such description
   must be sufficiently detailed for a recipient of ordinary skill to be able
   to understand it.

   5. Termination

      5.1. The rights granted under this License will terminate automatically
      if You fail to comply with any of its terms. However, if You become
      compliant, then the rights granted under this License from a particular
      Contributor are reinstated (a) provisionally, unless and until such
      Contributor explicitly and finally terminates Your grants, and (b) on an
      ongoing basis, if such Contributor fails to notify You of the
      non-compliance by some reasonable means prior to 60 days after You have
      come back into compliance. Moreover, Your grants from a particular
      Contributor are reinstated on an ongoing basis if such Contributor
      notifies You of the non-compliance by some reasonable means, this is the
      first time You have received notice of non-compliance with this License
      from such Contributor, and You become compliant prior to 30 days after
      Your receipt of the notice.

      5.2. If You initiate litigation against any entity by asserting a patent
      infringement claim (excluding declaratory judgment actions,
      counter-claims, and cross-claims) alleging that a Contributor Version
      directly or indirectly infringes any patent, then the rights granted to
      You by any and all Contributors for the Covered Software under Section
      2.1 of this License shall terminate.

      5.3. In the event of termination under Sections 5.1 or 5.2 above, all end
      user license agreements (excluding distributors and resellers) which have
      been validly granted by You or Your distributors under this License prior
      to termination shall survive termination.

   6. Disclaimer of Warranty

   Covered Software is provided under this License on an "as is" basis, without
   warranty of any kind, either expressed, implied, or statutory, including,
   without limitation, warranties that the Covered Software is free of defects,
   merchantable, fit for a particular purpose or non-infringing. The entire
   risk as to the quality and performance of the Covered Software is with You.
   Should any Covered Software prove defective in any respect, You (not any
   Contributor) assume the cost of any necessary servicing, repair, or
   correction. This disclaimer of warranty constitutes an essential part of
   this License. No use of any Covered Software is authorized under this
   License except under this disclaimer.

   7. Limitation of Liability

   Under no circumstances and under no legal theory, whether tort (including
   negligence), contract, or otherwise, shall any Contributor, or anyone who
   distributes Covered Software as permitted above, be liable to You for any
   direct, indirect, special, incidental, or consequential damages of any
   character including, without limitation, damages for lost profits, loss of
   goodwill, work stoppage, computer failure or malfunction, or any and all
   other commercial damages or losses, even if such party shall have been
   informed of the possibility of such damages. This limitation of liability
   shall not apply to liability for death or personal injury resulting from
   such party's negligence to the extent applicable law prohibits such
   limitation. Some jurisdictions do not allow the exclusion or limitation of
   incidental or consequential damages, so this exclusion and limitation may
   not apply to You.

   8. Litigation

   Any litigation relating to this License may be brought only in the courts of
   a jurisdiction where the defendant maintains its principal place of business
   and such litigation shall be governed by laws of that jurisdiction, without
   reference to its conflict-of-law provisions. Nothing in this Section shall
   prevent a party's ability to bring cross-claims or counter-claims.

   9. Miscellaneous

   This License represents the complete agreement concerning the subject matter
   hereof. If any provision of this License is held to be unenforceable, such
   provision shall be reformed only to the extent necessary to make it
   enforceable. Any law or regulation which provides that the language of a
   contract shall be construed against the drafter shall not be used to
   construe this License against a Contributor.

   10. Versions of the License

      10.1. New Versions

      Mozilla Foundation is the license steward. Except as provided in Section
      10.3, no one other than the license steward has the right to modify or
      publish new versions of this License. Each version will be given a
      distinguishing version number.

      10.2. Effect of New Versions

      You may distribute the Covered Software under the terms of the version of
      the License under which You originally received the Covered Software, or
      under the terms of any subsequent version published by the license
      steward.

      10.3. Modified Versions

      If you create software not governed by this License, and you want to
      create a new license for such software, you may create and use a modified
      version of this License if you rename the license and remove any
      references to the name of the license steward (except to note that such
      modified license differs from this License).

      10.4. Distributing Source Code Form that is Incompatible With Secondary
      Licenses

      If You choose to distribute Source Code Form that is Incompatible With
      Secondary Licenses under the terms of this version of the License, the
      notice described in Exhibit B of this License must be attached. Exhibit A
      - Source Code Form License Notice

This Source Code Form is subject to the terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not distributed with this file, You can obtain
one at http://mozilla.org/MPL/2.0/.

If it is not possible or desirable to put the notice in a particular file, then
You may include the notice in a location (such as a LICENSE file in a relevant
directory) where a recipient would be likely to look for such a notice.

You may add additional accurate notices of copyright ownership.

Exhibit B - "Incompatible With Secondary Licenses" Notice

This Source Code Form is "Incompatible With Secondary Licenses", as defined by
the Mozilla Public License, v. 2.0.

------

** Bullet Continuous Collision Detection and Physics Library; version 3.07 --
http://continuousphysics.com/Bullet/
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
** SDL; version 2.0.12 -- https://www.libsdl.org
Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
** zlib; version 1.2.11 -- https://zlib.net
Copyright (C) 1995-2017 Jean-loup Gailly

zlib License Copyright (c) <year> <copyright holders>

This software is provided 'as-is', without any express or implied warranty. In
no event will the authors be held liable for any damages arising from the use
of this software.

Permission is granted to anyone to use this software for any purpose, including
commercial applications, and to alter it and redistribute it freely, subject to
the following restrictions:

   1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software. If you use this software in a
   product, an acknowledgment in the product documentation would be appreciated
   but is not required.

   2. Altered source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

   3. This notice may not be removed or altered from any source distribution.

------

** LibTIFF; version 4.1.0 -- http://www.libtiff.org/
Copyright (c) 1988-1997 Sam Leffler
Copyright (c) 1991-1997 Silicon Graphics, Inc.

Copyright (c) 1988-1997 Sam Leffler

Copyright (c) 1991-1997 Silicon Graphics, Inc.

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that (i)
the above copyright notices and this permission notice appear in all copies of
the software and related documentation, and (ii) the names of Sam Leffler and
Silicon Graphics may not be used in any advertising or publicity relating to
the software without the specific, prior written permission of Sam Leffler and
Silicon Graphics.

THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS,
IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED
OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR
IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

------

** The LLVM Compiler Infrastructure; version 9.0.1 --
https://github.com/llvm/llvm-project/
University of Illinois/NCSA
Open Source License

Copyright (c) 2003-2019 University of Illinois at Urbana-Champaign.
All rights reserved.

---- LLVM Exceptions to the Apache 2.0 License ----

As an exception, if, as a result of your compiling your source code, portions
of this Software are embedded into an Object form of such source code, you
may redistribute such embedded portions in such Object form without complying
with the conditions of Sections 4(a), 4(b) and 4(d) of the License.

In addition, if you combine or link compiled forms of this Software with
software that is licensed under the GPLv2 ("Combined Software") and if a
court of competent jurisdiction determines that the patent provision (Section
3), the indemnity provision (Section 9) or other Section of the License
conflicts with the conditions of the GPLv2, you may retroactively and
prospectively choose to deem waived or otherwise exclude such Section(s) of
the License, but only in their entirety and only with respect to the Combined
Software.

------

** OpenSubdiv; version 3.4.3 -- http://graphics.pixar.com/opensubdiv
Copyright 2013 Pixar
** Universal Scene Description; version 20.05 -- http://www.openusd.org/
Copyright 2016 Pixar

Licensed under the Apache License, Version 2.0 (the "Apache License") with the
following modification; you may not use this file except in compliance with the
Apache License and the following modification to it:

Section 6. Trademarks. is deleted and replaced with:

6. Trademarks. This License does not grant permission to use the trade names,
trademarks, service marks, or product names of the Licensor and its affiliates,
except as required to comply with Section 4(c) of the License and to reproduce
the content of the NOTICE file.

------

** libjpeg-turbo; version 2.0.4 --
https://github.com/libjpeg-turbo/libjpeg-turbo/
Copyright (C)2009-2020 D. R. Commander. All Rights Reserved.
Copyright (C)2015 Viktor Szathmáry. All Rights Reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
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.
Neither the name of the libjpeg-turbo Project nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDERS OR CONTRIBUTORS 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.

------

** Boost C++ Libraries; version 1.70.0 -- https://www.boost.org/
-

Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:

The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

------

** Alembic; version 1.7.12 -- https://github.com/alembic/alembic
TM & © 2009-2015 Lucasfilm Entertainment Company Ltd. or Lucasfilm Ltd.
All rights reserved.

Industrial Light & Magic, ILM and the Bulb and Gear design logo are all
registered trademarks or service marks of Lucasfilm Ltd.

© 2009-2015 Sony Pictures Imageworks Inc.  All rights reserved.

TM & © 2009-2015 Lucasfilm Entertainment Company Ltd. or Lucasfilm Ltd.
All rights reserved.

Industrial Light & Magic, ILM and the Bulb and Gear design logo are all
registered trademarks or service marks of Lucasfilm Ltd.

© 2009-2015 Sony Pictures Imageworks Inc.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* 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.
* Neither the name of Industrial Light & Magic nor the names of
its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"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 THE COPYRIGHT
OWNER OR CONTRIBUTORS 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.


-------------------------------------------------------------------------------

ALEMBIC ATTACHMENT A —
REQUIRED NOTICES FOR DISTRIBUTION

The Alembic Software is distributed along with certain third party
components licensed under various open source software licenses ("Open
Source Components"). In addition to the warranty disclaimers contained
in the open source licenses found below, Industrial Light & Magic, a
division of Lucasfilm Entertainment Company Ltd. ("ILM") makes the
following disclaimers regarding the Open Source Components on behalf of
itself, the copyright holders, contributors, and licensors of such Open
Source Components:

TO THE FULLEST EXTENT PERMITTED UNDER APPLICABLE LAW, THE OPEN SOURCE
COMPONENTS ARE PROVIDED BY THE COPYRIGHT HOLDERS, CONTRIBUTORS,
LICENSORS, AND ILM "AS IS" AND ANY REPRESENTATIONS OR WARRANTIES OF ANY
KIND, WHETHER ORAL OR WRITTEN, WHETHER EXPRESS, IMPLIED, OR ARISING BY
STATUTE, CUSTOM, COURSE OF DEALING, OR TRADE USAGE, INCLUDING WITHOUT
LIMITATION THE IMPLIED WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR
A PARTICULAR PURPOSE, AND NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT
WILL THE COPYRIGHT OWNER, CONTRIBUTORS, LICENSORS, OR ILM AND/OR ITS
AFFILIATES 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 THE OPEN
SOURCE COMPONENTS, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Boost C++ Libraries
------------------------------------------------------------------------

Boost Software License – Version 1.0 August 17th, 2003 Permission is
hereby granted, free of charge, to any person or organization obtaining
a copy of the software and accompanying documentation covered by this
license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of
the Software, and to permit third-parties to whom the Software is
furnished to do so, all subject to the following:

The copyright notices in the Software and this entire statement,
including the above license grant, this restriction and the following
disclaimer, must be included in all copies of the Software, in whole or
in part, and all derivative works of the Software, unless such copies or
derivative works are solely in the form of machine-executable object
code generated by a source language processor.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE
DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY,
WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

------

** WC Width; version 2007-05-26 -- http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
Markus Kuhn -- 2007-05-26 (Unicode 5.0)

Permission to use, copy, modify, and distribute this software
for any purpose and without fee is hereby granted. The author
disclaims all warranties with regard to this software.

------

** Python; version 3.7.7 -- https://www.python.org
Copyright (c) 2001-2020 Python Software Foundation. All rights reserved.

A. HISTORY OF THE SOFTWARE
==========================

Python was created in the early 1990s by Guido van Rossum at Stichting
Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
as a successor of a language called ABC.  Guido remains Python's
principal author, although it includes many contributions from others.

In 1995, Guido continued his work on Python at the Corporation for
National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
in Reston, Virginia where he released several versions of the
software.

In May 2000, Guido and the Python core development team moved to
BeOpen.com to form the BeOpen PythonLabs team.  In October of the same
year, the PythonLabs team moved to Digital Creations, which became
Zope Corporation.  In 2001, the Python Software Foundation (PSF, see
https://www.python.org/psf/) was formed, a non-profit organization
created specifically to own Python-related Intellectual Property.
Zope Corporation was a sponsoring member of the PSF.

All Python releases are Open Source (see http://www.opensource.org for
the Open Source Definition).  Historically, most, but not all, Python
releases have also been GPL-compatible; the table below summarizes
the various releases.

    Release         Derived     Year        Owner       GPL-
                    from                                compatible? (1)

    0.9.0 thru 1.2              1991-1995   CWI         yes
    1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes
    1.6             1.5.2       2000        CNRI        no
    2.0             1.6         2000        BeOpen.com  no
    1.6.1           1.6         2001        CNRI        yes (2)
    2.1             2.0+1.6.1   2001        PSF         no
    2.0.1           2.0+1.6.1   2001        PSF         yes
    2.1.1           2.1+2.0.1   2001        PSF         yes
    2.1.2           2.1.1       2002        PSF         yes
    2.1.3           2.1.2       2002        PSF         yes
    2.2 and above   2.1.1       2001-now    PSF         yes

Footnotes:

(1) GPL-compatible doesn't mean that we're distributing Python under
    the GPL.  All Python licenses, unlike the GPL, let you distribute
    a modified version without making your changes open source.  The
    GPL-compatible licenses make it possible to combine Python with
    other software that is released under the GPL; the others don't.

(2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
    because its license has a choice of law clause.  According to
    CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
    is "not incompatible" with the GPL.

Thanks to the many outside volunteers who have worked under Guido's
direction to make these releases possible.


B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
===============================================================

Python software and documentation are licensed under the
Python Software Foundation License Version 2.

Starting with Python 3.8.6, examples, recipes, and other code in
the documentation are dual licensed under the PSF License Version 2
and the Zero-Clause BSD license.

Some software incorporated into Python is under different licenses.
The licenses are listed with code falling under that license.


PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
--------------------------------------------

1. This LICENSE AGREEMENT is between the Python Software Foundation
("PSF"), and the Individual or Organization ("Licensee") accessing and
otherwise using this software ("Python") in source or binary form and
its associated documentation.

2. Subject to the terms and conditions of this License Agreement, PSF hereby
grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
analyze, test, perform and/or display publicly, prepare derivative works,
distribute, and otherwise use Python alone or in any derivative version,
provided, however, that PSF's License Agreement and PSF's notice of copyright,
i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
2010,
2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Python Software
Foundation;
All Rights Reserved" are retained in Python alone or in any derivative version
prepared by Licensee.

3. In the event Licensee prepares a derivative work that is based on
or incorporates Python or any part thereof, and wants to make
the derivative work available to others as provided herein, then
Licensee hereby agrees to include in any such work a brief summary of
the changes made to Python.

4. PSF is making Python available to Licensee on an "AS IS"
basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
INFRINGE ANY THIRD PARTY RIGHTS.

5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

6. This License Agreement will automatically terminate upon a material
breach of its terms and conditions.

7. Nothing in this License Agreement shall be deemed to create any
relationship of agency, partnership, or joint venture between PSF and
Licensee.  This License Agreement does not grant permission to use PSF
trademarks or trade name in a trademark sense to endorse or promote
products or services of Licensee, or any third party.

8. By copying, installing or otherwise using Python, Licensee
agrees to be bound by the terms and conditions of this License
Agreement.


BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
-------------------------------------------

BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1

1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an
office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the
Individual or Organization ("Licensee") accessing and otherwise using
this software in source or binary form and its associated
documentation ("the Software").

2. Subject to the terms and conditions of this BeOpen Python License
Agreement, BeOpen hereby grants Licensee a non-exclusive,
royalty-free, world-wide license to reproduce, analyze, test, perform
and/or display publicly, prepare derivative works, distribute, and
otherwise use the Software alone or in any derivative version,
provided, however, that the BeOpen Python License is retained in the
Software, alone or in any derivative version prepared by Licensee.

3. BeOpen is making the Software available to Licensee on an "AS IS"
basis.  BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND
DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT
INFRINGE ANY THIRD PARTY RIGHTS.

4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE
SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS
AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY
DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

5. This License Agreement will automatically terminate upon a material
breach of its terms and conditions.

6. This License Agreement shall be governed by and interpreted in all
respects by the law of the State of California, excluding conflict of
law provisions.  Nothing in this License Agreement shall be deemed to
create any relationship of agency, partnership, or joint venture
between BeOpen and Licensee.  This License Agreement does not grant
permission to use BeOpen trademarks or trade names in a trademark
sense to endorse or promote products or services of Licensee, or any
third party.  As an exception, the "BeOpen Python" logos available at
http://www.pythonlabs.com/logos.html may be used according to the
permissions granted on that web page.

7. By copying, installing or otherwise using the software, Licensee
agrees to be bound by the terms and conditions of this License
Agreement.


CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
---------------------------------------

1. This LICENSE AGREEMENT is between the Corporation for National
Research Initiatives, having an office at 1895 Preston White Drive,
Reston, VA 20191 ("CNRI"), and the Individual or Organization
("Licensee") accessing and otherwise using Python 1.6.1 software in
source or binary form and its associated documentation.

2. Subject to the terms and conditions of this License Agreement, CNRI
hereby grants Licensee a nonexclusive, royalty-free, world-wide
license to reproduce, analyze, test, perform and/or display publicly,
prepare derivative works, distribute, and otherwise use Python 1.6.1
alone or in any derivative version, provided, however, that CNRI's
License Agreement and CNRI's notice of copyright, i.e., "Copyright (c)
1995-2001 Corporation for National Research Initiatives; All Rights
Reserved" are retained in Python 1.6.1 alone or in any derivative
version prepared by Licensee.  Alternately, in lieu of CNRI's License
Agreement, Licensee may substitute the following text (omitting the
quotes): "Python 1.6.1 is made available subject to the terms and
conditions in CNRI's License Agreement.  This Agreement together with
Python 1.6.1 may be located on the Internet using the following
unique, persistent identifier (known as a handle): 1895.22/1013.  This
Agreement may also be obtained from a proxy server on the Internet
using the following URL: http://hdl.handle.net/1895.22/1013".

3. In the event Licensee prepares a derivative work that is based on
or incorporates Python 1.6.1 or any part thereof, and wants to make
the derivative work available to others as provided herein, then
Licensee hereby agrees to include in any such work a brief summary of
the changes made to Python 1.6.1.

4. CNRI is making Python 1.6.1 available to Licensee on an "AS IS"
basis.  CNRI MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, CNRI MAKES NO AND
DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 1.6.1 WILL NOT
INFRINGE ANY THIRD PARTY RIGHTS.

5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
1.6.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1,
OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

6. This License Agreement will automatically terminate upon a material
breach of its terms and conditions.

7. This License Agreement shall be governed by the federal
intellectual property law of the United States, including without
limitation the federal copyright law, and, to the extent such
U.S. federal law does not apply, by the law of the Commonwealth of
Virginia, excluding Virginia's conflict of law provisions.
Notwithstanding the foregoing, with regard to derivative works based
on Python 1.6.1 that incorporate non-separable material that was
previously distributed under the GNU General Public License (GPL), the
law of the Commonwealth of Virginia shall govern this License
Agreement only as to issues arising under or with respect to
Paragraphs 4, 5, and 7 of this License Agreement.  Nothing in this
License Agreement shall be deemed to create any relationship of
agency, partnership, or joint venture between CNRI and Licensee.  This
License Agreement does not grant permission to use CNRI trademarks or
trade name in a trademark sense to endorse or promote products or
services of Licensee, or any third party.

8. By clicking on the "ACCEPT" button where indicated, or by copying,
installing or otherwise using Python 1.6.1, Licensee agrees to be
bound by the terms and conditions of this License Agreement.

        ACCEPT


CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2
--------------------------------------------------

Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam,
The Netherlands.  All rights reserved.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Stichting Mathematisch
Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

ZERO-CLAUSE BSD LICENSE FOR CODE IN THE PYTHON DOCUMENTATION
----------------------------------------------------------------------

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

------

** Jemalloc; version 5.2.1 -- https://github.com/jemalloc/jemalloc
Copyright (C) 2002-present Jason Evans <jasone@canonware.com>.
All rights reserved.
Copyright (C) 2007-2012 Mozilla Foundation.  All rights reserved.
Copyright (C) 2009-present Facebook, Inc.  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(s),
   this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice(s),
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``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 THE COPYRIGHT HOLDER(S) 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.

------

** The OpenGL Extension Wrangler Library; version 2.0.0 --
http://glew.sourceforge.net/
Copyright (C) 2008-2015, Nigel Stewart <nigels[]users sourceforge net>
Copyright (C) 2002-2008, Milan Ikits <milan ikits[]ieee org>
Copyright (C) 2002-2008, Marcelo E. Magallon <mmagallo[]debian org>
Copyright (C) 2002, Lev Povalahev
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* 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.
* The name of the author may be used to endorse or promote products
  derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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.


Mesa 3-D graphics library
Version:  7.0

Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


Copyright (c) 2007 The Khronos Group Inc.

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Materials.

THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.