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Open Cascade Technology
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<p>Open Cascade Technology (OCCT, formerly named CAS.CADE) is an object-oriented C++ class library for <a href="/facts/3D_computer_graphics/zlWW6eaF">3D</a> <a href="/facts/Computer-aided_design/5gSXrmmN">computer-aided design</a> (CAD), <a href="/facts/Computer-aided_manufacturing/gqYHXcK9">computer-aided manufacturing</a> (CAM), <a href="/facts/Computer-aided_engineering/dAsPLr5Y">computer-aided engineering</a> (CAE), etc. It is developed and supported by <a href="/facts/Open_Cascade/0jj8PPhj">Open Cascade</a> SAS company. It is <a href="/facts/Free_and_open-source_software/1cHtjLCB">free and open-source software</a> released under the <a href="/facts/GNU_Lesser_General_Public_License/AXwkz9x3">GNU Lesser General Public License</a> (LGPL), version 2.1 only, which permits open source and proprietary uses. </p><p>OCCT is a full-scale <a href="/facts/Boundary_representation/arfJ6TnR">boundary representation</a> (B-rep) modeling toolkit. </p>