Merge pull request 'jf/cla+templates' (#6) from jf/cla+templates into main

Reviewed-on: https://codeberg.org/TetGen/TetGen/pulls/6

.github/issue_template.md

@@ -0,0 +1,22 @@
+Thank you very much for your interest in TetGen! Reporting your issue helps to improve the code.
+
+### Legal
+By opening this issue, you agree to the terms of the Contributor License Agreement (CLA) stated in [CONTRIBUTING.md](https://codeberg.org/TetGen/TetGen/src/branch/main/CONTRIBUTING.md).
+
+### Kind of issue (bug, feature request...):
+
+### Issue description:
+
+### Expected behavior: 
+
+### Observed behavior: 
+
+### Environment:
+   - TeGen version:
+   - OS (e.g. MacOS 14):
+   - Architecture (e.g. x64, aarch64):
+   - Compiler vendor + version:
+
+### Minimum working example:
+
+Please attach input data which allow to reproduce the problem.

.github/pull_request_template.md

@@ -0,0 +1,12 @@
+Thank you very much for helping to improve TetGen!
+
+### Legal:
+By opening this pull request, you agree to the terms of the Contributor License Agreement (CLA) stated in [CONTRIBUTING.md](https://codeberg.org/TetGen/TetGen/src/branch/main/CONTRIBUTING.md).
+
+- [ ] I have read and agree to the Contributor License Agreement in CONTRIBUTING.md
+
+### Pull request description:
+
+
+### Test data:
+Please provide input data which help to test the feature implemented in the pull request.

CONTRIBUTING.md

@@ -0,0 +1,56 @@
+# Contributor License Agreement (CLA)
+
+A "Contributor" is any person or entity that intentionally submits copyrighted material to the project,
+including but not limited to code, documentation, or other material, via a pull request, issue, or other means.
+
+By submitting a contribution Contributor agrees to the following terms:
+
+## Dual AGPLv3/MIT License Grant
+Contributor agrees that their contribution is provided under the GNU Affero General Public License v3 (AGPLv3) reproduced
+in the file [LICENSE](LICENSE) or any later version and, in addition, grants the contribution under the MIT License terms below:
+
+```text
+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.  
+```
+
+## Annotating contributions to source code
+
+### Trivial changes
+Trivial changes (e.g., 1-2 line fixes or typo fixes) inherit the AGPLv3 license of the project and without further annotation are also licensed under MIT as specified above.
+
+### Functions and nontrivial snippets of code 
+Functions and nontrivial snippets of code by default inherit the AGPLv3 license of the project and are also licensed under MIT as specified above. They shall be marked in a PR with an SPDX header as in this example:
+  ```
+  # SPDX-License-Identifier: AGPL-3.0-or-later OR MIT
+  # Copyright (c) [Year] [Contributor Name]
+  void frobnicate(int ntet)
+  {
+  ...
+  }
+  ```
+
+## Representations and Warranties
+Contributor represents that:
+- They are legally entitled to grant the above licenses;
+- Their contributions are original works and do not violate third-party rights;
+- They are not required to grant licenses under third-party terms (e.g., employer agreements).
+
+## No Obligation
+The Project is under no obligation to accept or use any contribution.
+

LICENSE

@@ -1,23 +1,3 @@
-TetGen License
---------------
-
-TetGen is distributed under a dual licensing scheme. You can
-redistribute it and/or modify it under the terms of the GNU Affero
-General Public License as published by the Free Software Foundation,
-either version 3 of the License, or (at your option) any later
-version. A copy of the GNU Affero General Public License is reproduced
-below.
-
-If the terms and conditions of the AGPL v.3. would prevent you from
-using TetGen, please consider the option to obtain a commercial
-license for a fee. These licenses are offered by the Weierstrass
-Institute for Applied Analysis and Stochastics (WIAS). As a rule,
-licenses are provided "as-is", unlimited in time for a one time
-fee. Please send corresponding requests to:
-tetgen@wias-berlin.de. Please do not forget to include some
-description of your company and the realm of its activities.
-
-=====================================================================
 GNU AFFERO GENERAL PUBLIC LICENSE
 
 Version 3, 19 November 2007
@@ -663,4 +643,4 @@ the specific requirements.
 You should also get your employer (if you work as a programmer) or
 school, if any, to sign a "copyright disclaimer" for the program, if
 necessary. For more information on this, and how to apply and follow
-the GNU AGPL, see <http://www.gnu.org/licenses/>.
+the GNU AGPL, see <http://www.gnu.org/licenses/>.

README

@@ -1,24 +0,0 @@
-This is TetGen version 1.6.0 (released on August 31, 2020)
-
-Please see the documentation of TetGen for compiling and using TetGen.
-It is available at the following link:
-
-            http://www.tetgen.org
-
-For more information on this product, contact :
-
-  Hang Si
-  Research Group of Numerical Mathematics and Scientific Computing
-  Weierstrass Institute for Applied Analysis and Stochastics
-  Mohrenstr. 39
-  10117 Berlin, Germany
-
- EMail: <si@wias-berlin.de>
- Web Site: http://www.wias-berlin.de/~si
-
-------------------- IMPORTANCE NOTICE -----------------------------
-
-BEFORE INTALLING OR USING TetGen(R) READ the 
-GENERAL LICENSE TERMS AND CONDITIONS
-
--------------------------------------------------------------------

README.md

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+TetGen
+======
+
+TetGen is a program to generate tetrahedral meshes of any 3D polyhedral domains.  TetGen generates exact constrained Delaunay tetrahedralizations, boundary conforming Delaunay meshes, and Voronoi partitions.
+
+TetGen versions up to v1.6.0 have been developed headed by [Hang Si](https://github.com/sihang0592) during his affiliation with [Weierstrass Institute for Applied Analysis and Stochastics, (WIAS) Berlin](https://www.wias-berlin.de/software/tetgen).
+
+The primary development repository is [https://codeberg.org/TetGen/TetGen](https://codeberg.org/TetGen/TetGen). Please
+open any issues in this repository. The github repository [https://github.com/TetGen/Tetgen](https://github.com/TetGen/Tetgen)
+is a mirror of the codeberg repository.
+
+This repository provides the source code of the most recent versions of TetGen.
+The following releases are provided:
+- [v1.4.3, 2011](https://codeberg.org/TetGen/TetGen/archive/v1.4.3.tar.gz): [MIT license with noncommercial clause](https://raw.githubusercontent.com/TetGen/TetGen/refs/tags/v1.4.3/LICENSE).
+- [v1.5.0, 2013](https://codeberg.org/TetGen/TetGen/archive/v1.5.0.tar.gz): [AGPLv3 license](https://www.gnu.org/licenses/agpl-3.0.html).
+- [v1.5.1, 2018](https://codeberg.org/TetGen/TetGen/archive/v1.5.1.tar.gz): [AGPLv3 license](https://www.gnu.org/licenses/agpl-3.0.html), recommended as most stable version.
+- [v1.6.0, 2020](https://codeberg.org/TetGen/TetGen/archive/v1.6.0.tar.gz): [AGPLv3 license](https://www.gnu.org/licenses/agpl-3.0.html), most recent version with some rough edges.
+
+It is planned to resume active development of TetGen in cooperation between the main developer Hang Si and  the Weierstrass Institute. Future versions of TetGen will be published via this repository.
+
+## Documentation
+- Manuals are available in https://codeberg.org/TetGen/Manuals.
+- A technical paper about TetGen is available at [Hang Si, "TetGen, a Delaunay-Based Quality Tetrahedral Mesh Generator". ACM Trans. on Mathematical Software. 41 (2), 2015](http://doi.acm.org/10.1145/2629697)
+  
+  
+## Commercial licensing
+
+TetGen versions developed at WIAS are distributed under a dual licensing scheme.  As an alternative to the use of TetGen under the AGPLv3 license, consider the option to obtain a commercial license for a fee.  These licenses are offered by the Weierstrass Institute for Applied Analysis and Stochastics (WIAS). As a rule, licenses are provided "as-is", unlimited in time for a one time fee.  Please send corresponding requests to: `tetgen at wias-berlin.de`.  Please do not forget to include some description of your company and the realm of its activities.
+
+Details about the extension of this dual licensing scheme for future versions of TetGen will be announced in due time.
+
+## Contributing
+
+By submitting a contribution (including but not limited to code, documentation, or other materials) via a pull request, issue, or other means, a contributor agrees to the terms of the contributor license agreement stated in [CONTRIBUTING.md](CONTRIBUTING.md). It is planned to revise this agreement, once the extension of the dual licensing scheme has been set up.
+