Original CSG.JS library by Evan Wallace (http://madebyevan.com), under the MIT license.
GitHub: https://github.com/evanw/csg.js/

C++ port by Tomasz Dabrowski (http://28byteslater.com), under the MIT license.
GitHub: https://github.com/dabroz/csgjs-cpp/

C# port by Karl Henkel (parabox.co), under MIT license.
GitHub: https://github.com/karl-/pb_CSG