LICENCE.md · 赵昱皓/antons_opengl_tutorials_book

# Licences

## Digital Content

Asset content is mostly drawn/modelled by Anton Gerdelan, and you are free to use in any way that
you like. There are exceptions:

* Skybox textures are from Emil Persson's website
[http://www.humus.name/index.php?page=Textures](http://www.humus.name/index.php?page=Textures)

These have a Creative Commons Attribution 3.0 Unported Licence.

* GNU "freemono" font is from GNU FreeFont (GNU General Public Licence)
[https://www.gnu.org/software/freefont/](https://www.gnu.org/software/freefont/)

* The "Suzanne" monkey mesh is from Blender software
[http://blender.org/](http://blender.org/)

## Source Code

All code is written by Anton Gerdelan, except for the libraries detailed in the following subsection, which have their own licences. Your are free to fork, share, refer to, upload, modify, and compile the original example code into free or commercial programs. **You are not permitted to charge money for the source code as an educational resource**, offer it as an included good or service as part of a for-profit course, include it as an educational service in return for consultancy fees, or otherwise misrepresent copyright. If in doubt provide a referring URL or GitHub fork back to this repository https://github.com/capnramses/antons_opengl_tutorials_book/, author's webpage http://antongerdelan.net, or an authorised distributor's page for Anton's OpenGL 4 Tutorials book - Amazon and Itch.io. If you believe you have paid an unauthorised party to receive this free code or its non-free book please contact the author.

### Third-Party Libraries

* Sean Barrett's public domain stb_image and stb_image_write libraries https://github.com/nothings/stb

* AssImp library http://assimp.sourceforge.net/

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 assimp team 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.

* FreeType 2 library (FTL licence) http://www.freetype.org/

This  license  grants  a  worldwide, royalty-free,  perpetual  and
  irrevocable right  and license to use,  execute, perform, compile,
  display,  copy,   create  derivative  works   of,  distribute  and
  sublicense the  FreeType Project (in  both source and  object code
  forms)  and  derivative works  thereof  for  any  purpose; and  to
  authorize others  to exercise  some or all  of the  rights granted
  herein, subject to the following conditions:

o Redistribution of  source code  must retain this  license file
      (`FTL.TXT') unaltered; any  additions, deletions or changes to
      the original  files must be clearly  indicated in accompanying
      documentation.   The  copyright   notices  of  the  unaltered,
      original  files must  be  preserved in  all  copies of  source
      files.

o Redistribution in binary form must provide a  disclaimer  that
      states  that  the software is based in part of the work of the
      FreeType Team,  in  the  distribution  documentation.  We also
      encourage you to put an URL to the FreeType web page  in  your
      documentation, though this isn't mandatory.

These conditions  apply to any  software derived from or  based on
  the FreeType Project,  not just the unmodified files.   If you use
  our work, you  must acknowledge us.  However, no  fee need be paid
  to us.

* GLEW library http://glew.sourceforge.net/

GLEW is originally derived from the EXTGL project by Lev Povalahev. The source
code is licensed under the Modified BSD License, the Mesa 3-D License
(MIT License), and the Khronos License (MIT License). The automatic code
generation scripts are released under the GNU GPL.

* GLFW library http://www.glfw.org/

GLFW is licensed under the zlib/libpng license, a simple license that permits
modification, distribution and use in closed source software.

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