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id="toc-CAD_programs_based_on_Open_Cascade_Technology" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#CAD_programs_based_on_Open_Cascade_Technology"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>CAD programs based on Open Cascade Technology</span> </div> </a> <ul id="toc-CAD_programs_based_on_Open_Cascade_Technology-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet 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mw-list-item"><a href="https://ca.wikipedia.org/wiki/Open_Cascade_Technology" title="Open Cascade Technology – Catalan" lang="ca" hreflang="ca" data-title="Open Cascade Technology" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Open_CASCADE_Technology" title="Open CASCADE Technology – German" lang="de" hreflang="de" data-title="Open CASCADE Technology" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Open_CASCADE_Technology" title="Open CASCADE Technology – French" lang="fr" hreflang="fr" data-title="Open CASCADE Technology" data-language-autonym="Français" data-language-local-name="French" 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.infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Open Cascade Technology</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Occtecht01sm_wiki.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/1/11/Occtecht01sm_wiki.jpg/120px-Occtecht01sm_wiki.jpg" decoding="async" width="120" height="48" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/11/Occtecht01sm_wiki.jpg/180px-Occtecht01sm_wiki.jpg 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/1/11/Occtecht01sm_wiki.jpg/240px-Occtecht01sm_wiki.jpg 2x" data-file-width="250" data-file-height="99" /></a></span></td></tr><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Opencascadedemo.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Opencascadedemo.jpg/220px-Opencascadedemo.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Opencascadedemo.jpg/330px-Opencascadedemo.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Opencascadedemo.jpg/440px-Opencascadedemo.jpg 2x" data-file-width="1024" data-file-height="768" /></a></span><div class="infobox-caption">OpenCASCADE Screenshot</div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data"><a href="/wiki/Open_Cascade" title="Open Cascade">Open Cascade</a> S.A.S.U.</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">1999<span class="noprint">; 25 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">1999</span>)</span></td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">7.8.1<sup id="cite_ref-wikidata-a81ca6d823ed4a141152f2a4604146e44285a670-v18_1-0" class="reference"><a href="#cite_note-wikidata-a81ca6d823ed4a141152f2a4604146e44285a670-v18-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1760165?uselang=en#P348" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span> / 1 April 2024<span class="noprint">; 7 months ago</span><span style="display:none"> (<span class="bday dtstart published updated">1 April 2024</span>)</span></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Repository_(version_control)" title="Repository (version control)">Repository</a></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li><span class="url"><a rel="nofollow" class="external text" href="http://git.dev.opencascade.org/gitweb/?p=occt.git">git<wbr />.dev<wbr />.opencascade<wbr />.org<wbr />/gitweb<wbr />/?p=occt<wbr />.git</a></span> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1760165#P1324" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></li></ul> </div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Written in</th><td class="infobox-data"><a href="/wiki/C%2B%2B" title="C++">C++</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/Linux" title="Linux">Linux</a>, <a href="/wiki/FreeBSD" title="FreeBSD">FreeBSD</a>, <a href="/wiki/Mac_OS_X" class="mw-redirect" title="Mac OS X">Mac OS X</a>, <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Windows</a>, <a href="/wiki/Android_(operating_system)" title="Android (operating system)">Android</a>, <a href="/wiki/IOS" title="IOS">iOS</a> and <a href="/wiki/WebAssembly" title="WebAssembly">WebAssembly</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Computer-aided_design" title="Computer-aided design">CAD</a>, <a href="/wiki/Computer-aided_manufacturing" title="Computer-aided manufacturing">CAM</a>, <a href="/wiki/Computer-aided_engineering" title="Computer-aided engineering">CAE</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/GNU_Lesser_General_Public_License" title="GNU Lesser General Public License">LGPL-2.1-only</a><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> with exception<sup id="cite_ref-licensing_3-0" class="reference"><a href="#cite_note-licensing-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><a rel="nofollow" class="external free" href="https://dev.opencascade.org">https://dev.opencascade.org</a></td></tr></tbody></table> <p><b>Open Cascade Technology</b> (OCCT), formerly called <i>CAS.CADE</i>, is an <a href="/wiki/Open-source_software" title="Open-source software">open-source software</a> development platform for 3D <a href="/wiki/Computer-aided_design" title="Computer-aided design">CAD</a>, <a href="/wiki/Computer-aided_manufacturing" title="Computer-aided manufacturing">CAM</a>, <a href="/wiki/Computer-aided_engineering" title="Computer-aided engineering">CAE</a>, etc. that is developed and supported by <a href="/wiki/Open_Cascade" title="Open Cascade">Open Cascade SAS</a> company. </p><p>OCCT is a full-scale <a href="/wiki/Boundary_representation" title="Boundary representation">B-Rep (Boundary representation)</a> modeling toolkit. OCCT is available under the <a href="/wiki/GNU_Lesser_General_Public_License" title="GNU Lesser General Public License">LGPL-2.1-only</a> license, which permits its usage in open source and proprietary applications. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>CAS.CADE</i> (abbreviated from Computer Aided Software for Computer Aided Design and Engineering) was originally developed in the early 1990s by <a href="/wiki/Matra" title="Matra">Matra</a> Datavision, developer of <a href="/wiki/Euclid_(computer_program)" title="Euclid (computer program)">Euclid</a> CAD software as the underlying infrastructure for its future version Euclid Quantum. In 1998 the company abandoned software development to concentrate on services, and most of the software development facilities were sold<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> to <a href="/wiki/Dassault_Syst%C3%A8mes" title="Dassault Systèmes">Dassault Systèmes</a>, developer of competing <a href="/wiki/CATIA" title="CATIA">CATIA</a>. </p> <table class="wikitable"> <caption> </caption> <tbody><tr> <th>Product name </th> <th>Release date </th> <th>Latest Update Version </th> <th>Latest Update Date </th> <th>Highlights </th></tr> <tr> <th>Open CASCADE Technology 7.6 </th> <td><span class="nowrap">2021-11-03</span> </td> <td>7.6.2 </td> <td><span class="nowrap">2022-04-29</span> </td> <td> <ul><li>Added progress indication / abortion to Boolean operations and offset algorithm.</li> <li>Added support of kinematics entities to STEP reader.</li> <li>Introduced interface for partial OCAF document reading.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 7.5 </th> <td>2020-11-05 </td> <td>7.5.3 </td> <td>2021-08-06 </td> <td> <ul><li>Real-time <a href="/wiki/Physically_based_rendering" title="Physically based rendering">Physically based rendering</a> (PBR) renderer using Metallic-Roughness material model.</li> <li>WebAssembly target platform support (including <a href="/wiki/WebGL" title="WebGL">WebGL</a> viewer).</li> <li>UNICODE support in STEP reader/writer.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 7.4 </th> <td><span class="nowrap">2019-10-01</span> </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> <ul><li>Improved BRepMesh performance, robustness and accuracy.</li> <li>Improved robustness and stability of Boolean operations and Extrema.</li> <li>Improved performance of built-in parallelization tools (OSD_Parallel).</li> <li>Added <a href="/wiki/GlTF" title="GlTF">glTF</a> 2.0 and <a href="/wiki/Wavefront_.obj_file" title="Wavefront .obj file">OBJ</a> readers.</li> <li>Added AIS_ViewController mapping user input to 3D viewer camera manipulations.</li> <li>Added support of 3/4 and box clipping configurations to 3D viewer.</li> <li>Added fast HLR-alike <a href="/wiki/OpenGL" title="OpenGL">OpenGL</a> rendering mode.</li> <li>Removed legacy Local Context functionality from AIS and legacy Boolean operations.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 7.3 </th> <td>2018-05-29 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> <ul><li>Added algorithm constructing OBB (oriented bounding box).</li> <li>Optimized surface intersection, shape offset and Boolean operation algorithms.</li> <li>Added distance and size culling rendering features.</li> <li>Added support of UNICODE filenames with MinGW-w64.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 7.2 </th> <td>2017-08-31 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> <ul><li>Added support of OCAF binary files larger than 2 GiB.</li> <li>Added "Glue"<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> option to Boolean algorithms.</li> <li>Added support of annotations, saved views and clipping planes to STEP and XDE.</li> <li>Added Weighted OIT (<a href="/wiki/Order-independent_transparency" title="Order-independent transparency">Order-independent transparency</a>) rendering feature.</li> <li><a href="/wiki/Path_Tracing" class="mw-redirect" title="Path Tracing">Path Tracing</a> engine improvements.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 7.1 </th> <td>2016-11-25 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> <ul><li>OCAF persistence without dynamically loaded plugins.</li> <li>Improved STEP AP242 support, including PMI, dimensions and annotations.</li> <li>Improved rendering performance of Wireframe AIS_Shape presentation.</li> <li>Added AIS_Manipulator for interactive object transformations in 3D viewer.</li> <li>TKOpenGl now uses <a href="/wiki/OpenGL_Shading_Language" title="OpenGL Shading Language">GLSL</a> programs by default.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 7.0 </th> <td>2016-04-05 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> <ul><li>WOK (Workshop Organization Kit) has been replaced by <a href="/wiki/CMake" title="CMake">CMake</a> building scripts.</li> <li>CDL files have been replaced by pre-generated C++ headers.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 6.9 </th> <td>2015-05-12 </td> <td>6.9.1 </td> <td>2015-09-28 </td> <td> <ul><li>Introduced "Fuzzy"<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Boolean operations with specified global tolerance.</li> <li>Introduced built-in multi-threading parallelization tools as alternative to <a href="/wiki/Threading_Building_Blocks" title="Threading Building Blocks">TBB</a> library.</li> <li>Improved robustness of surface-surface intersection and curve on surface projection.</li> <li>Improved performance of p-curve reconstruction within STEP import.</li> <li>Improved compatibility with <a href="/wiki/OpenGL_ES" title="OpenGL ES">OpenGL ES</a> 2.0.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 6.8 </th> <td>2014-11-10 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> <ul><li>Added support of UNICODE (<a href="/wiki/UTF-8" title="UTF-8">UTF-8</a>) filenames.</li> <li>Added STL-compatible iterators to NCollection classes.</li> <li>"Handle" smart-pointer now uses NULL pointer instead of a special value 0xfefd0000.</li> <li>Added <a href="/wiki/Bounding_volume_hierarchy" title="Bounding volume hierarchy">Bounding volume hierarchy</a> (BVH) algorithms and structures.</li> <li>Introduced multi-threaded version of Boolean operation algorithm.</li> <li>Introduced limited <a href="/wiki/OpenGL_ES" title="OpenGL ES">OpenGL ES</a> 2.0 support in 3D viewer.</li> <li>Added VIS / TKIVtk component<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> providing a B-Rep shape presentation builder for <a href="/wiki/VTK" title="VTK">VTK</a> viewer.</li> <li>Added support of <a href="/wiki/Stereo_display" class="mw-redirect" title="Stereo display">stereoscopic displays</a><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> within 3D viewer.</li> <li>Added frustum culling feature improving rendering performance.</li> <li>Ray-Tracing engine has been switched from <a href="/wiki/OpenCL" title="OpenCL">OpenCL</a> to <a href="/wiki/OpenGL_Shading_Language" title="OpenGL Shading Language">GLSL</a> implementation.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 6.7 </th> <td>2013-12-18 </td> <td>6.7.1 </td> <td>2014-04-30 </td> <td> <ul><li><b>License has been changed to <a href="/wiki/GNU_Lesser_General_Public_License" title="GNU Lesser General Public License">LGPL-2.1-only</a> with additional exception.</b><sup id="cite_ref-licensing_3-1" class="reference"><a href="#cite_note-licensing-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li>Built-in GPU-accelerated Ray-Tracing rendering engine<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> using <a href="/wiki/OpenCL" title="OpenCL">OpenCL</a>.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 6.6 </th> <td>2013-04-22 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> </td></tr> <tr> <th>Open CASCADE Technology 6.5 </th> <td>2011-04-04 </td> <td>6.5.5 </td> <td>2013-03-29 </td> <td> </td></tr> <tr> <th>Open CASCADE Technology 6.4 </th> <td>2010-09-30 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> <ul><li>Added multi-threaded mode to BRepMesh algorithm (introduced optional <a href="/wiki/Threading_Building_Blocks" title="Threading Building Blocks">TBB</a> library support).</li> <li>Improved rendering performance by using <a href="/wiki/Vertex_buffer_object" title="Vertex buffer object">Vertex buffer object</a> (VBO).</li> <li>TKOpenGl implementation converted from C to C++ classes.</li> <li>Improved text rendering with help of FTGL and <a href="/wiki/FreeType" title="FreeType">FreeType</a> libraries.</li> <li>Improved algorithms for line-line, line-plane and plane-plane intersection.</li></ul> </td></tr> <tr> <th>Open CASCADE Technology 6.3 </th> <td>2008-09-03 </td> <td>6.3.1 </td> <td>2009-06-19 </td> <td> </td></tr> <tr> <th>Open CASCADE Technology 6.2 </th> <td>? </td> <td>6.2.1 </td> <td>2007-12-06 </td> <td> </td></tr> <tr> <th>Open CASCADE Technology 6.1 </th> <td>2006-03-24 </td> <td>6.1.1 </td> <td>2006-10-16 </td> <td> </td></tr> <tr> <th>Open CASCADE Technology 5.2 </th> <td>? </td> <td>5.2.4 </td> <td>2005-07-29 </td> <td> </td></tr> <tr> <th>Open CASCADE Technology 5.1 </th> <td>? </td> <td>5.1.3 </td> <td>2004-04-23 </td> <td>"Open CASCADE" has been renamed to "Open CASCADE Technology". </td></tr> <tr> <th>Open CASCADE 4.0 </th> <td>2001-12-11 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> </td></tr> <tr> <th>Open CASCADE 3.0 </th> <td>2000-04-24 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> </td></tr> <tr> <th>Open CASCADE 2.0 </th> <td>? </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> </td></tr> <tr> <th>Open CASCADE 1.0 </th> <td>1999 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">— </td> <td> </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="Open_sourcing">Open sourcing</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=2" title="Edit section: Open sourcing"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 1999 Matra Datavision decided to publish its CAS.CADE infrastructure under an open-source model under the <i>Open CASCADE Technology Public License</i><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> and renamed it Open Cascade.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>In 2000, a separate company, Open Cascade SAS, was created to make business around Open Cascade.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Open Cascade SAS was sold in 2003 to Principia, a French service provider corporation, and then in 2006 it was acquired by <a href="/wiki/Euriware" title="Euriware">Euriware</a> Group, a subsidiary of <a href="/wiki/Areva" title="Areva">Areva</a>. </p><p>In 2004, software was renamed to Open Cascade Technology in order to distinguish it from the name of the company itself. </p><p>Open Cascade S.A.S. provides a certified version of the library, which is released sporadically, usually 1–2 releases per year.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> Until version 6.5.0 (2011), only minor and major versions were publicly available, while intermediate (maintenance) releases were accessible only to customers of Open Cascade S.A.S. For example, version 6.3.0 was publicly released in 2008, and the next public version 6.5.0 was released in early 2011. All recent releases starting from version 6.5.0 are public.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Community_fork">Community fork</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=3" title="Edit section: Community fork"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In March 2011, Thomas Paviot initiated a fork of the then most recent publicly available version 6.5.0 of Open Cascade library. The initiative is called Open Cascade Community Edition. The project aims to establish a separate community-based release and bug-report process for the library.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Collaborative_development_portal">Collaborative development portal</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=4" title="Edit section: Collaborative development portal"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In December 2011, Open Cascade installed a web portal for external contributors<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> and made its <a href="/wiki/Mantis_Bug_Tracker" title="Mantis Bug Tracker">Mantis Bug Tracker</a><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> and further <a href="/wiki/Git_(software)" class="mw-redirect" title="Git (software)">Git</a> repository<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> publicly available (read-only GitHub mirror<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> has been established in '2020). According to the statements on the new website, external contributors from the Open Source Community are encouraged to participate in the development of Open Cascade Technology, i.e. register bugs directly in the <a href="/wiki/Bugtracker" class="mw-redirect" title="Bugtracker">bugtracker</a>, make contributions to the code after signing a <a href="/wiki/Contributor_License_Agreement" title="Contributor License Agreement">Contributor License Agreement</a>,<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> etc. </p> <div class="mw-heading mw-heading3"><h3 id="License_change">License change</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=5" title="Edit section: License change"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Since 18 December 2013 with version 6.7.0 Open Cascade Technology is available under the <a href="/wiki/GNU_Lesser_General_Public_License" title="GNU Lesser General Public License">LGPL-2.1-only</a> with additional exception.<sup id="cite_ref-licensing_3-2" class="reference"><a href="#cite_note-licensing-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> Versions before that were licensed under the "Open Cascade Technology Public License" which was <a href="/wiki/License_compatibility" title="License compatibility">not compatible</a> with the <a href="/wiki/GPL" class="mw-redirect" title="GPL">GPL</a><sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> and was considered non-free by the <a href="/wiki/Fedora_Project" title="Fedora Project">Fedora project</a>.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Functionality">Functionality</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=6" title="Edit section: Functionality"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Object_libraries">Object libraries</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=7" title="Edit section: Object libraries"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>OCCT's functionality is split into several large modules. Each module defines a list of toolkits (libraries). Key Modules: </p> <ul><li><b>Foundation Classes</b>: defines basic classes, memory allocators, OS abstraction layer, collections (data maps, arrays, etc.), acceleration data structures (<a href="/wiki/Bounding_volume_hierarchy" title="Bounding volume hierarchy">BVH Trees</a>) and <a href="/wiki/Linear_algebra" title="Linear algebra">vector/matrix math</a> used by other Modules.</li> <li><b>Modeling Data</b>: supplies data structures to represent 2D and 3D geometric primitives (analytical curves: Line, <a href="/wiki/Circle" title="Circle">Circle</a>, <a href="/wiki/Ellipse" title="Ellipse">Ellipse</a>, Hyperbola, <a href="/wiki/Parabola" title="Parabola">Parabola</a>, <a href="/wiki/B%C3%A9zier_curve" title="Bézier curve">Bézier</a>, <a href="/wiki/B-spline" title="B-spline">B-spline</a>, Offset; analytical surfaces: Plane, <a href="/wiki/Cylinder" title="Cylinder">Cylinder</a>, <a href="/wiki/Cone" title="Cone">Cone</a>, <a href="/wiki/Sphere" title="Sphere">Sphere</a>, <a href="/wiki/Torus" title="Torus">Torus</a>, <a href="/wiki/B%C3%A9zier_surface" title="Bézier surface">Bézier</a>, <a href="/wiki/B-spline" title="B-spline">B-spline</a>, <a href="/wiki/Surface_of_revolution" title="Surface of revolution">Revolution</a>, Extrusion, Offset) and their compositions into <a href="/wiki/Boundary_representation" title="Boundary representation">B-Rep</a> models.</li> <li><b>Modeling Algorithms</b>: contains a vast range of geometrical and topological algorithms (intersection, Boolean operations, <a href="/wiki/Surface_triangulation" title="Surface triangulation">surface meshing</a>, <a href="/wiki/Fillet_(mechanics)" title="Fillet (mechanics)">fillets</a>, shape healing).</li> <li><b>Visualization (rendering)</b>: provides interactive services for displaying geometry in 3D Viewer; implements a compact <a href="/wiki/OpenGL" title="OpenGL">OpenGL</a> / <a href="/wiki/OpenGL_ES" title="OpenGL ES">OpenGL ES</a> renderer, supporting conventional <a href="/wiki/Phong_shading" title="Phong shading">Phong</a>, real-time <a href="/wiki/Physically_based_rendering" title="Physically based rendering">PBR</a> metal-roughness shading models as well as interactive <a href="/wiki/Ray_tracing_(graphics)" title="Ray tracing (graphics)">Ray-Tracing</a>/<a href="/wiki/Path_tracing" title="Path tracing">Path-Tracing</a> engine.</li> <li><b>Data Exchange</b>: provides possibility to import/export various CAD formats. <br /><a href="/wiki/ISO_10303" title="ISO 10303">STEP</a>, <a href="/wiki/IGES" title="IGES">IGES</a>, <a href="/wiki/GlTF" title="GlTF">glTF</a>, <a href="/wiki/Wavefront_.obj_file" title="Wavefront .obj file">OBJ</a>, <a href="/wiki/STL_(file_format)" title="STL (file format)">STL</a> and <a href="/wiki/VRML" title="VRML">VRML</a> are supported natively.<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> Other formats can be imported by using plug-ins.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> Extended Data Exchange (<b>XDE</b>) components rely on a unified <b>XCAF document</b> definition, which includes an assembly structure of CAD shapes, color/name/material/metadata/layer attributes as well as other supplementary information like <a href="/wiki/Product_and_manufacturing_information" title="Product and manufacturing information">PMI</a>.</li> <li><b>Application Framework</b>: offers solutions<sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Use_plain_English#Buzzwords" title="Wikipedia:Use plain English"><span title="The material near this tag may use buzzwords designed solely to impress you or obscure meaning. (January 2022)">buzzword</span></a></i>]</sup> for handling application-specific data.</li> <li><b>DRAW Test Harness</b>: implements a scripting interface to OCCT algorithms based on <a href="/wiki/Tcl" title="Tcl">Tcl</a>-interpreter for interactive usage, automating processes, prototyping applications and testing purposes.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Workshop_Organization_Kit">Workshop Organization Kit</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=8" title="Edit section: Workshop Organization Kit"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Workshop Organization Kit (WOK) is Open Cascade development environment, which has been designed to allow a large number of developers to work on a product getting advantage of common reference version shared over the local network. </p><p>Until OCCT 7.0.0 release, substantial modifications in the source code were not possible without using WOK, since it is the only tool that provides support for CDL (CAS.CADE definition language), used for declaration of most of OCCT classes and also serving to define logical structure of OCCT libraries. WOK has been included in previous OCCT distributions; since OCCT version 6.4 it is made an independent tool. </p><p>Within 7.0.0 release, all CDL files have been dropped from OCCT source code making WOK no longer necessary for OCCT development. </p> <div class="mw-heading mw-heading3"><h3 id="Working_with_IFC_files">Working with IFC files</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=9" title="Edit section: Working with IFC files"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Open CASCADE IFC Import SDK provides applications with the capability of reading <a href="/wiki/Building_Information_Modeling" class="mw-redirect" title="Building Information Modeling">BIM</a> data from files in <a href="/wiki/Industry_Foundation_Classes" title="Industry Foundation Classes">IFC</a> format. It supports versions IFC2×3 and IFC4 that used by most modern applications.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p><p>This allows visualization and manipulation of building geometries and CAD designs. </p><p>External tools are available to convert from Open CASCADE to IFC as well.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="CAD_programs_based_on_Open_Cascade_Technology">CAD programs based on Open Cascade Technology</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=10" title="Edit section: CAD programs based on Open Cascade Technology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Several CAD programs rely on Open CASCADE Technology including:<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> </p> <ul><li><a href="/wiki/FreeCAD" title="FreeCAD">FreeCAD</a> an open source, 3D parametric modeler, with support for <a href="/wiki/Building_information_modeling" title="Building information modeling">building information modeling</a>, <a href="/wiki/Finite_element_method" title="Finite element method">finite-element-method (FEM)</a>, and <a href="/wiki/Python_(programming_language)" title="Python (programming language)">Python</a> scripting.<sup id="cite_ref-fossmint_29-0" class="reference"><a href="#cite_note-fossmint-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Salome_(software)" title="Salome (software)">SALOME</a> an open source platform for pre- and post-processing for numerical simulation.</li> <li><a href="/wiki/KiCad" title="KiCad">KiCad</a> an open source suite for electronic design automation (EDA).<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/Gmsh" title="Gmsh">Gmsh</a> an open source finite-element mesh (FEM) generator. Since version 3.0, Gmsh supports full constructive solid geometry features, based on OCCT.</li> <li><a href="/wiki/FORAN_System" title="FORAN System">FORAN</a> an integrated CAD/CAM/CAE system developed by <a href="/wiki/SENER" title="SENER">SENER</a> for the design and production of practically any naval ship and offshore unit. <a href="/wiki/FORAN_System" title="FORAN System">FORAN</a> uses OCCT since V80R2.0 release<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> for working with analytical surfaces.</li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Open_Cascade_Technology&action=edit&section=11" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style 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class="references"> <li id="cite_note-wikidata-a81ca6d823ed4a141152f2a4604146e44285a670-v18-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-wikidata-a81ca6d823ed4a141152f2a4604146e44285a670-v18_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription 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.cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dev.opencascade.org/content/open-cascade-technology-781-maintenance-release">"Open CASCADE Technology 7.8.1 maintenance release"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">15 April</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Open+CASCADE+Technology+7.8.1+maintenance+release&rft_id=https%3A%2F%2Fdev.opencascade.org%2Fcontent%2Fopen-cascade-technology-781-maintenance-release&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://git.dev.opencascade.org/gitweb/?p=occt.git;a=blob;f=README.txt">"README.txt"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=README.txt&rft_id=https%3A%2F%2Fgit.dev.opencascade.org%2Fgitweb%2F%3Fp%3Docct.git%3Ba%3Dblob%3Bf%3DREADME.txt&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-licensing-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-licensing_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-licensing_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-licensing_3-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dev.opencascade.org/resources/licensing/">"OCCT license"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OCCT+license&rft_id=https%3A%2F%2Fdev.opencascade.org%2Fresources%2Flicensing%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.3ds.com/press-releases/single/dassault-systemes-signs-agreement-to-acquire-matra-datavisions-subsidiary/">"Dassault Systemes Signs Agreement to Acquire Matra Datavision's Subsidiary"</a>. 27 January 2020.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Dassault+Systemes+Signs+Agreement+to+Acquire+Matra+Datavision%27s+Subsidiary&rft.date=2020-01-27&rft_id=https%3A%2F%2Fwww.3ds.com%2Fpress-releases%2Fsingle%2Fdassault-systemes-signs-agreement-to-acquire-matra-datavisions-subsidiary%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dev.opencascade.org/content/gluing-options-boolean-component">"Gluing Options in Boolean Component - Forum Open Cascade Technology"</a>. <i>dev.opencascade.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">18 August</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=dev.opencascade.org&rft.atitle=Gluing+Options+in+Boolean+Component+-+Forum+Open+Cascade+Technology&rft_id=https%3A%2F%2Fdev.opencascade.org%2Fcontent%2Fgluing-options-boolean-component&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dev.opencascade.org/content/fuzzy-boolean-operations">"Fuzzy Boolean Operations - Forum Open Cascade Technology"</a>. <i>dev.opencascade.org</i><span class="reference-accessdate">. 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Retrieved <span class="nowrap">18 August</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=dev.opencascade.org&rft.atitle=VTK+integration+services+in+OCCT+-+Forum+Open+Cascade+Technology&rft_id=https%3A%2F%2Fdev.opencascade.org%2Fcontent%2Fvtk-integration-services-occt&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dev.opencascade.org/content/stereoscopic-rendering-open-cascade-technology">"Stereoscopic rendering in Open CASCADE Technology - Forum Open Cascade Technology"</a>. <i>dev.opencascade.org</i><span class="reference-accessdate">. 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Retrieved <span class="nowrap">18 August</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=dev.opencascade.org&rft.atitle=Ray+tracing+as+alternative+rendering+method+for+OCCT+visualization+component+-+Forum+Open+Cascade+Technology&rft_id=https%3A%2F%2Fdev.opencascade.org%2Fcontent%2Fray-tracing-alternative-rendering-method-occt-visualization-component&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.opencascade.org/getocc/license/license_old/">"Open CASCADE Technology Public License"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Open+CASCADE+Technology+Public+License&rft_id=http%3A%2F%2Fwww.opencascade.org%2Fgetocc%2Flicense%2Flicense_old%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120409094949/http://findarticles.com/p/articles/mi_pwwi/is_20050229/ai_mark01000244/">"Downloading Of Source Code For Open Cascade Gains Momentum | Market Wire | Find Articles"</a>. 9 April 2012. Archived from <a rel="nofollow" class="external text" href="http://findarticles.com/p/articles/mi_pwwi/is_20050229/ai_mark01000244/">the original</a> on 9 April 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">22 November</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Downloading+Of+Source+Code+For+Open+Cascade+Gains+Momentum+%26%23124%3B+Market+Wire+%26%23124%3B+Find+Articles&rft.date=2012-04-09&rft_id=http%3A%2F%2Ffindarticles.com%2Fp%2Farticles%2Fmi_pwwi%2Fis_20050229%2Fai_mark01000244%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.ebusiness-watch.org/studies/case_studies/documents/Case%20Studies%202005/CS_SR10_IT-services_4-Open_Cascade.pdf">European e-Business Market Watch Case Study: Open source-based services by Open Cascade S.A.</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110726012648/http://www.ebusiness-watch.org/studies/case_studies/documents/Case%20Studies%202005/CS_SR10_IT-services_4-Open_Cascade.pdf">Archived</a> 26 July 2011 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dev.opencascade.org/release/previous/">"OCCT Previous Releases"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=OCCT+Previous+Releases&rft_id=https%3A%2F%2Fdev.opencascade.org%2Frelease%2Fprevious%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.opencascade.org/about/news/issue173/">"Becoming more and more open!"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Becoming+more+and+more+open%21&rft_id=http%3A%2F%2Fwww.opencascade.org%2Fabout%2Fnews%2Fissue173%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AOpen+Cascade+Technology" class="Z3988"></span></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110416225420/http://www.opencascade.org/org/forum/thread_20111">"Thinkings about the 6.5.0 release, OCCT status, and the relationship with the Community"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.opencascade.org/org/forum/thread_20111/">the original</a> on 16 April 2011<span class="reference-accessdate">. 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Inventor">Autodesk Inventor</a></li> <li><a href="/wiki/Autodesk_Revit" title="Autodesk Revit">Autodesk Revit</a></li> <li><a href="/wiki/AutoTURN" title="AutoTURN">AutoTURN</a></li> <li><a href="/wiki/BricsCAD" title="BricsCAD">BricsCAD</a></li> <li><a href="/wiki/CADKEY" title="CADKEY">CADKEY</a></li> <li><a href="/wiki/CATIA" title="CATIA">CATIA</a></li> <li><a href="/wiki/Cimatron" title="Cimatron">Cimatron</a></li> <li><a href="/wiki/Cobalt_(CAD_program)" title="Cobalt (CAD program)">Cobalt</a></li> <li><a href="/wiki/PTC_Creo_Elements/Direct_Drafting" title="PTC Creo Elements/Direct Drafting">Creo Elements/Direct Drafting</a></li> <li><a href="/wiki/PTC_Creo_Elements/Pro" class="mw-redirect" title="PTC Creo Elements/Pro">Creo Elements/Pro</a></li> <li><a href="/wiki/DesignSpark_Mechanical" title="DesignSpark Mechanical">DesignSpark Mechanical</a></li> <li><a href="/wiki/EasyCAD" class="mw-redirect" title="EasyCAD">EasyCAD</a></li> <li><a href="/wiki/FastCAD" title="FastCAD">FastCAD</a></li> <li><a href="/wiki/FINE_MEP" title="FINE MEP">FINE</a></li> <li><a href="/wiki/FORAN_System" title="FORAN System">FORAN</a></li> <li><a href="/wiki/Fusion_360" title="Fusion 360">Fusion 360</a></li> <li><a href="/wiki/GstarCAD" title="GstarCAD">GstarCAD</a></li> <li><a href="/wiki/IRONCAD" title="IRONCAD">IRONCAD</a></li> <li><a href="/wiki/KeyCreator" title="KeyCreator">KeyCreator</a></li> <li><a href="/wiki/MEDUSA" title="MEDUSA">MEDUSA</a></li> <li><a href="/wiki/MicroStation" title="MicroStation">MicroStation</a></li> <li><a href="/wiki/Siemens_NX" title="Siemens NX">NX</a></li> <li><a href="/wiki/Onshape" title="Onshape">Onshape</a></li> <li><a href="/wiki/PDMS_(software)" title="PDMS (software)">PDMS</a></li> <li><a href="/wiki/Pro/DESKTOP" title="Pro/DESKTOP">Pro/DESKTOP</a></li> <li><a href="/wiki/Rhinoceros_3D" title="Rhinoceros 3D">Rhinoceros 3D</a> <ul><li><a href="/wiki/Grasshopper_3D" title="Grasshopper 3D">Grasshopper 3D</a></li></ul></li> <li><a href="/wiki/RattleCAD#Source_closing" title="RattleCAD">rattleCAD 4.0</a></li> <li><a href="/wiki/RUCAPS" title="RUCAPS">RUCAPS</a></li> <li><a href="/wiki/Solid_Edge" title="Solid Edge">Solid Edge</a></li> <li><a href="/wiki/SolidWorks" title="SolidWorks">SolidWorks</a></li> <li><a href="/wiki/SpaceClaim" title="SpaceClaim">SpaceClaim</a></li> <li><a href="/wiki/T-FLEX_CAD" title="T-FLEX CAD">T-FLEX CAD</a></li> <li><a href="/wiki/Tinkercad" title="Tinkercad">Tinkercad</a></li> <li><a href="/wiki/TurboCAD" title="TurboCAD">TurboCAD</a></li> <li><a href="/wiki/VariCAD" title="VariCAD">VariCAD</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Electronic_design_automation" title="Electronic design automation">Electrical</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Allegro_(CAD_software)" class="mw-redirect" title="Allegro (CAD software)">Allegro</a></li> <li><a href="/wiki/Altium_Designer" title="Altium Designer">Altium Designer</a></li> <li><a href="/wiki/AutoCAD_Electrical" class="mw-redirect" title="AutoCAD Electrical">AutoCAD Electrical</a></li> <li><a href="/wiki/Autotrax" title="Autotrax">Autotrax</a></li> <li><a href="/wiki/BoardStation" class="mw-redirect" title="BoardStation">BoardStation</a></li> <li><a href="/wiki/CADSTAR" title="CADSTAR">CADSTAR</a></li> <li><a href="/wiki/CircuitMaker" title="CircuitMaker">CircuitMaker</a></li> <li><a href="/wiki/CR-2000" class="mw-redirect" title="CR-2000">CR-2000</a></li> <li><a href="/wiki/CR-3000" class="mw-redirect" title="CR-3000">CR-3000</a></li> <li><a href="/wiki/CR-5000" title="CR-5000">CR-5000</a></li> <li><a href="/wiki/CR-8000" title="CR-8000">CR-8000</a></li> <li><a href="/wiki/Delta_Design" class="mw-redirect" title="Delta Design">Delta Design</a></li> <li><a href="/wiki/DesignSpark_PCB" title="DesignSpark PCB">DesignSpark PCB</a></li> <li><a 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title="Parasolid">Parasolid</a></li> <li><a href="/wiki/Russian_Geometric_Kernel" title="Russian Geometric Kernel">RGK</a></li> <li><a href="/wiki/Romulus_(modelling_kernel)" title="Romulus (modelling kernel)">Romulus</a></li> <li><a href="/wiki/KernelCAD" class="mw-redirect" title="KernelCAD">KernelCAD</a></li> <li><a href="/wiki/ShapeManager" title="ShapeManager">ShapeManager</a></li> <li><a href="/wiki/Teigha" class="mw-redirect" title="Teigha">Teigha</a></li> <li><a href="/wiki/IntelliCAD" title="IntelliCAD">IntelliCAD</a></li> <li><a href="/wiki/Solid_Modeling_Solutions" title="Solid Modeling Solutions">SMLib</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Historic</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/DAC-1" title="DAC-1">DAC-1</a> (1963)</li> <li><a href="/wiki/Sketchpad" title="Sketchpad">Sketchpad</a> (1963)</li> <li><a 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title="LinuxCNC">LinuxCNC</a></li> <li><a class="mw-selflink selflink">Open Cascade Technology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Proprietary</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/CATIA" title="CATIA">CATIA</a></li> <li><a href="/w/index.php?title=Easymill&action=edit&redlink=1" class="new" title="Easymill (page does not exist)">Easymill</a></li> <li><a href="/wiki/PTC_Creo_Elements/Pro" class="mw-redirect" title="PTC Creo Elements/Pro">Creo Elements/Pro</a></li> <li><a href="/wiki/FORAN_System" title="FORAN System">FORAN</a></li> <li><a href="/wiki/Mastercam" title="Mastercam">Mastercam</a></li> <li><a href="/wiki/MazaCAM" title="MazaCAM">MazaCAM</a></li> <li><a href="/wiki/NC-CAM" title="NC-CAM">NC-CAM</a></li> <li><a href="/wiki/PowerMILL" title="PowerMILL">PowerMILL</a></li> <li><a href="/wiki/Siemens_NX" title="Siemens NX">Siemens NX</a></li> <li><a href="/wiki/SmartCAM" title="SmartCAM">SmartCAM</a></li> <li><a href="/wiki/SprutCAM" title="SprutCAM">SprutCAM</a></li> <li><a href="/wiki/VoluMill" title="VoluMill">VoluMill</a></li> <li><a href="/wiki/WorkNC" title="WorkNC">WorkNC</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="CAE_software" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar 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<li><a href="/wiki/Calculix" title="Calculix">Calculix</a></li> <li><a href="/wiki/Code_Saturne" title="Code Saturne">Code Saturne</a></li> <li><a href="/wiki/Deal.II" title="Deal.II">deal.II</a></li> <li><a href="/wiki/Elmer_FEM_solver" title="Elmer FEM solver">Elmer</a></li> <li><a href="/wiki/FEBio" title="FEBio">FEBio</a></li> <li><a href="/wiki/FEniCS_Project" title="FEniCS Project">FEniCS</a></li> <li><a href="/wiki/FreeFem%2B%2B" title="FreeFem++">FreeFem++</a></li> <li><a href="/wiki/Gerris_(software)" title="Gerris (software)">Gerris</a></li> <li><a href="/wiki/GetFEM%2B%2B" title="GetFEM++">GetFEM++</a></li> <li><a href="/wiki/MOOSE_(software)" title="MOOSE (software)">MOOSE</a></li> <li><a href="/wiki/Nek5000" title="Nek5000">Nek5000</a></li> <li><a href="/wiki/Nektar%2B%2B" title="Nektar++">Nektar++</a></li> <li><a class="mw-selflink selflink">Open Cascade Technology</a></li> <li><a href="/wiki/OpenFOAM" title="OpenFOAM">OpenFOAM</a></li> <li><a href="/wiki/QBlade" title="QBlade">QBlade</a></li> <li><a href="/wiki/Salome_(software)" title="Salome (software)">Salome</a></li> <li><a href="/wiki/Stanford_University_Unstructured" class="mw-redirect" title="Stanford University Unstructured">SU2</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Proprietary</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abaqus" title="Abaqus">Abaqus</a></li> <li><a href="/wiki/Actran" title="Actran">Actran</a></li> <li><a href="/wiki/ADINA" title="ADINA">ADINA</a></li> <li><a href="/wiki/Altair_Engineering" title="Altair Engineering">Altair</a></li> <li><a href="/wiki/Ansys" title="Ansys">Ansys</a></li> <li><a href="/wiki/Autodesk_Simulation" title="Autodesk Simulation">Autodesk Simulation</a></li> <li><a href="/wiki/CATIA" title="CATIA">CATIA</a></li> <li><a href="/wiki/COMSOL_Multiphysics" title="COMSOL Multiphysics">COMSOL Multiphysics</a></li> <li><a href="/wiki/Computer_Simulation_Technology" class="mw-redirect" title="Computer Simulation Technology">CST Studio Suite</a></li> <li><a href="/wiki/DIANA_FEA" title="DIANA FEA">DIANA</a></li> <li><a href="/wiki/FEATool_Multiphysics" title="FEATool Multiphysics">FEATool Multiphysics</a></li> <li><a href="/wiki/Femap" title="Femap">Femap</a></li> <li><a href="/wiki/Fluent,_Inc." class="mw-redirect" title="Fluent, Inc.">Fluent</a></li> <li><a href="/wiki/FORAN_System" title="FORAN System">FORAN</a></li> <li><a href="/wiki/JCMsuite" title="JCMsuite">JCMsuite</a></li> <li><a href="/wiki/JMAG" title="JMAG">JMAG</a></li> <li><a href="/wiki/KIVA_(software)" title="KIVA (software)">KIVA</a></li> <li><a href="/wiki/LS-DYNA" title="LS-DYNA">LS-DYNA</a></li> <li><a href="/wiki/MSC_Adams" title="MSC Adams">MSC_Adams</a></li> <li><a href="/wiki/MSC_Marc" title="MSC Marc">MSC_Marc</a></li> <li><a href="/w/index.php?title=Midas_Civil&action=edit&redlink=1" class="new" title="Midas Civil (page does not exist)">Midas Civil</a></li> <li><a href="/wiki/Nastran" title="Nastran">Nastran</a></li> <li><a href="/wiki/PTC_Creo" title="PTC Creo">PTC Creo</a></li> <li><a href="/wiki/RFEM" title="RFEM">RFEM</a></li> <li><a href="/wiki/SESAM_(FEM)" class="mw-redirect" title="SESAM (FEM)">Sesam</a></li> <li><a href="/wiki/Siemens_NX" title="Siemens NX">Siemens NX</a></li> <li><a href="/wiki/Simcenter_STAR-CCM%2B" title="Simcenter STAR-CCM+">Simcenter STAR-CCM+</a></li> <li><a href="/wiki/SolidWorks" title="SolidWorks">SolidWorks</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Cloud-based</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SimScale" title="SimScale">SimScale</a></li> <li><a href="/wiki/CONSELF" title="CONSELF">CONSELF</a></li> <li><a href="/wiki/Onshape" title="Onshape">Onshape</a></li></ul> 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