Translations:Third Party Libraries/15/en

OCC is a full-featured CAD Kernel. Originally, it's developed by Matra Datavision in France for the Strim (Styler) and Euclid Quantum applications and later on made Open Source. It's a really huge library and makes a free CAD application possible in the first place, by providing some packages which would be hard or impossible to implement in an Open Source project:
 * A complete STEP compliant geometry kernel
 * A topological data model and all needed functions to work on (cut, fuse, extrude, and so on. . . )
 * Standard Import- / Export processors like STEP, IGES, VRML
 * 3D and 2D viewer with selection support
 * A document and project data structure with support for save and restore, external linking of documents, recalculation of design history (parametric modeling) and a facility to load new data types as an extension package dynamically