OpenCascade

OpenCASCADE Technology, often abbreviated as OpenCASCADE or OCCT, is a powerful open-source software development platform for 3D CAD, CAM, CAE, and PDM applications. It was originally developed by the French company Matra Datavision and later transferred to an independent entity, Open CASCADE SAS, before becoming open source. The platform provides a comprehensive set of C++ class libraries and tools that enable developers to create sophisticated geometric modeling kernels, data exchange tools, and visualization modules.

At its core, OpenCASCADE offers a robust 3D modeling kernel that supports various modeling techniques, including B-rep (Boundary Representation) and the creation of parametric models. It handles complex geometric constructions, such as surfaces, solids, and assemblies, with a high degree of precision. The platform also includes modules for mesh generation, finite element analysis pre-processing, and tools for standard data exchange formats like STEP and IGES.

OpenCASCADE is widely used in various industries for developing custom CAD software, engineering simulation tools, and manufacturing applications. Its open-source nature allows for flexibility, customization, and collaboration within the development community. The availability of its source code under the GNU LGPL license makes it an attractive choice for both academic research and commercial product development.