License

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

Code

Intellectual Property Notice

Celeritas is licensed under the Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0) or the MIT license, (LICENSE-MIT or http://opensource.org/licenses/MIT), at your option.

Copyrights and patents in the Celeritas project are retained by contributors. No copyright assignment is required to contribute to Celeritas.

SPDX usage

Individual files contain SPDX tags instead of the full license text. This enables machine processing of license information based on the SPDX License Identifiers that are available here: https://spdx.org/licenses/

Files that are dual-licensed as Apache-2.0 OR MIT contain the following text in the license header:

SPDX-License-Identifier: (Apache-2.0 OR MIT)

Documentation

Intellectual Property Notice

Celeritas documentation is licensed under the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/legalcode).

Copyrights and patents in the Celeritas project are retained by contributors. No copyright assignment is required to contribute to Celeritas.

SPDX usage

Individual files contain SPDX tags instead of the full license text. This enables machine processing of license information based on the SPDX License Identifiers that are available here: https://spdx.org/licenses/

Files that are licensed under CC 4.0 with attribution contain the following text in the license header:

SPDX-License-Identifier: CC-BY-4.0

Additional licenses

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

BVHNavigator

Derived from AdePT<https://github.com/apt-sim/AdePT> 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.