.. Copyright 2022-2024 UT-Battelle, LLC, and other Celeritas developers.
.. See the doc/COPYRIGHT file for details.
.. SPDX-License-Identifier: CC-BY-4.0

.. highlight:: none

.. _license:

*******
License
*******

Celeritas is copyrighted and licensed under the following terms and conditions.


.. _code_copyright:

Code
====

.. include:: ../../COPYRIGHT


Documentation
=============

.. include:: ../COPYRIGHT


Additional licenses
===================

Small portions of Celeritas are derived from other open source projects.

CERN Apache 2.0
---------------

The following VecGeom-related components are derivative works:

- BVHNavigator: from AdePT_

with portions distributed under the following license::

   Copyright 2020 CERN

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

.. _AdePT: https://github.com/apt-sim/AdePT

LLVM Apache 2.0 w/ LLVM exception
---------------------------------

The implementation of several algorithms are derived from LLVM's libc++::

    Copyright 2021 LLVM

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.