The architect of BRL-CAD, a substantial third-generation CSG solid modeling system available free of charge, and the author of ping and ttcp.- Category ID : 55586
Constructive Solid Geometry (CSG) 3D modelling system originally developed by the US Army, now an open-source project. Package includes an interactive geometry editor, ray tracing support for rendering and geometric analysis, network distributed framebuffer support, image-processing and signal-processing tools.