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(This section is informal and not legally binding.)
This library is free code– you can use it without charge and it is minimally legally encumbered. Unlike some other free libraries, we do not require you to release your source code or make your own program open source.
I intend the license (below) to protect me and the other contributors from liability and allow you to use the source however you want. You can make your own closed or open-source programs, sell them, give them away, whatever.
The license for G3D itself and the libaries included in the G3D distribution create certain documentation obligations for you. For convenience, G3D::license is a function that returns the license string you must put in your documentation. G3D::GApp will automatically write a file (g3d-license.txt) to disk with the contents of this license unless you tell it not to, thus automatically satisfying your documentation requirement after the first time you run a G3D program.
Most of the data resources have either entered the public domain and have been in several published papers or are data that I have explicitly received permission to distribute with G3D. The G3D fonts are actually font images, not TrueType font descriptions and may be freely distributed. As a rule of thumb, you can freely use and distribute anything you find in the data directory but may need permission to use it in a commercial product. Check the various copyright.txt files in the data directories for specific information.
You are required by the BSD license to acknowledge G3D in your documentation. This can be as minimal as a note buried in the fine print at the end of a manual or a text file accompanying your program. I appreciate it if you acknowledged the library more publicly but you aren't required to.
Likewise, you are encouraged but not required to submit patches to improve the library for the benefit of all. Post bugs, patches, and questions to the g3d-users forum linked at the top of this page.
-Morgan McGuire <email@example.com>
Copyright © 2000-2011, Morgan McGuire
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 Morgan McGuire, Williams College, Brown University, 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.