-Overview {#mainpage}
-========
-
-@tableofcontents
-
-@section OCCT_OVW_SECTION_1 Welcome
-
-Welcome to Open CASCADE Technology (OCCT), a software development platform
-providing services for 3D surface and solid modeling, CAD data exchange, and
-visualization. Most of OCCT functionality is available in the form of C++
-libraries. OCCT can be best applied in development of software dealing with 3D
-modeling (CAD), manufacturing / measuring (CAM) or numerical simulation (CAE).
-
-@htmlonly<center>@endhtmlonly
-http://www.opencascade.org
-@image html /resources/occt_logo.png
-@image latex /resources/occt_logo.png
-@htmlonly</center>@endhtmlonly
-
-@section OCCT_OVW_SECTION_2 Copyrights
-
-Open CASCADE Technology and all materials, including this documentation, is
-Copyright (c) 1999-2013 by OPEN CASCADE S.A.S. All rights reserved.
-
-@htmlonly<center>@endhtmlonly
-http://www.opencascade.com
-@image html /resources/occ_logo.png
-@image latex /resources/occ_logo.png
-@htmlonly</center>@endhtmlonly
-
- License
---------
-
-Open CASCADE Technology is free software; you can redistribute it and / or
-modify it under the terms of the
-@ref license_lgpl_21 "GNU Lesser General Public License (LGPL) version 2.1",
-with additional @ref occt_lgpl_exception "exception".
-
-Alternatively, Open CASCADE Technology may be used under the terms of Open
-CASCADE commercial license or contractual agreement.
-
-Note that Open CASCADE Technology is provided on an "AS IS" basis, WITHOUT
-WARRANTY OF ANY KIND. The entire risk related to any use of the OCCT code and
-materials is on you. See the @ref occt_public_license "license" text for formal
-disclaimer.
-
- Trademark information
-----------------------
-
-You are hereby informed that all software is a property of its respective authors and is protected by
-international and domestic laws on intellectual property and trademarks.
-Should you need further information, please directly contact the authors.
-
-**CAS.CADE** and **Open CASCADE** are registered trademarks of
-OPEN CASCADE S.A.S.
-
-**Linux** is a registered trademark of Linus Torvalds.
-
-**Windows** is a registered trademark of Microsoft Corporation in the United States and other countries.
-
-**Mac** and the Mac logo, **OpenCL** and the OpenCL logo, are trademarks of
-Apple Inc., registered in the U.S. and other countries.
-
- Acknowledgements
-------------------
-
-The following parties are acknowledged for producing tools which are used within
-Open CASCADE Technology libraries or for release preparation.
-
-You are hereby informed that all rights to the software listed below belong to its respective
-authors and such software may not be freely available and/or be free of charge for any kind
-of use or purpose. We strongly recommend that you carefully read the license of these products
-and, in case you need any further information, directly contact their authors.
-
-**Qt** is a cross-platform application framework that is widely used for developing application software
-with graphical user interface (GUI). Qt is free and open source software distributed under
-the terms of the GNU Lesser General Public License. In OCCT Qt is used for programming samples.
-If you need further information on Qt, please, refer to Qt Homepage (http://qt.digia.com).
-
-**Tcl** is a high-level programming language. Tk is a graphical user interface (GUI) toolkit,
-with buttons, menus, listboxes, scrollbars, and so on. Taken together Tcl and Tk provide a solution
-to develop cross-platform graphical user interfaces with a native look and feel. Tcl/Tk is under copyright by
-Scriptics Corp., Sun Microsystems, and other companies. However, Tcl/Tk is an open source, and
-the copyright allows you to use, modify, and redistribute Tcl/Tk for any purpose, without an
-explicit license agreement and without paying any license fees or royalties.
-To use Tcl/Tk, please refer to the Licensing Terms (http://www.tcl.tk/software/tcltk/license.html).
-
-**Robert Boehne** has developed **GNU Autoconf**, **Automake** and **Libtool** scripts and makefiles
-for the Open CASCADE project http://sourceforge.net/projects/autoopencas/,
-which became an initial groundwork for the build scripts based on respective GNU tools
-(autoconf, automake and libtool) in Open CASCADE Technology version 4.0.
-These scripts are now maintained by the OPEN CASCADE company.
-
-**GL2PS** is developed by Christophe Geuzaine and others. It is optionally used by OCCT to
-export content of OpenGL scene to vector graphics formats (PS, PDF, EMF, SVG).
-The library is licensed under GL2PS LICENSE http://www.geuz.org/gl2ps/COPYING.GL2PS Version 2, November 2003.
-
-**FreeType 2** is developed by Antoine Leca, David Turner, Werner Lemberg and others.
-It is a software font engine that is designed to be small, efficient, highly customizable and
-portable while capable of producing high-quality output (glyph images). This product
-can be used in graphic libraries, display servers, font conversion tools,
-text image generation tools, and many other products.
-
-FreeType 2 is released under two open-source licenses: BSD-like FreeType License and the GPL.
-
-**Intel(R) Threading Building Blocks (TBB)** offers a rich and complete approach to expressing parallelism in a C++ program.
-It is a library that helps you to take advantage of multi-core processor performance without having to be a threading expert.
-Threading Building Blocks is not just a threads-replacement library. It represents a higher-level, task-based parallelism that
-abstracts platform details and threading mechanisms for scalability and performance.
-TBB is available under GPLv2 license with the runtime exception.
-
-Open CASCADE Technology WOK module on Windows also makes use of LGPL-licensed C routines **regexp**
-and **getopt**, taken from GNU C library.
-
-**OpenGL** is an industry standard API for 3D graphics used by OCCT for
-implementation of 3D viewer. OpenGL specification is developed by the
-Khronos group, http://www.khronos.org/opengl/. OCCT code includes header
-file *glext.h* obtained from Khronos web site.
-
-**OpenCL** (Open Computing Language) is open, royalty-free standard for
-cross-platform, parallel programming of modern processors, optionally used by
-OCCT for ray tracing. OpenCL specification is developed by the
-Khronos group, http://www.khronos.org/opencl/. The implementations of OpenCL
-are available from Apple, AMD, NVIDIA, Intel, and other vendors.
-**OpenCL Installable Client Driver (ICD) Loader** is a library provided by
-Khronos group which allows dispatching OpenCL calls to underlying
-implementation.
-
-**Doxygen** developed by Dimitri van Heesch is open source documentation system for
-C++, C, Java, Objective-C, Python, IDL, PHP and C#. This product is used in Open CASCADE Technology
-for automatic creation of Technical Documentation from C++ header files.
-If you need further information on Doxygen, please refer to http://www.stack.nl/~dimitri/doxygen/index.html.
-
-**Graphviz** is open source graph visualization software developed by John Ellson, Emden Gansner, Yifan Hu and Arif Bilgin.
-Graph visualization is representiation of structured information as diagrams of abstract graphs and networks.
-This product is used together with Doxygen in Open CASCADE Technology for automatic creation of Technical Documentation
-(generation of dependency graphs). Current versions of Graphviz are licensed on an open source
-basis under The Eclipse Public License (EPL) (http://www.graphviz.org/License.php).
-
-**Inno Setup** is a free script-driven installation system created in CodeGear Delphi by Jordan Russell.
-In OCCT Inno Setup is used to create Installation Wizard on Windows.
-It is licensed under Inno Setup License (http://www.jrsoftware.org/files/is/license.txt).
-
-**FreeImage** is an Open Source library supporting popular graphics image formats, such as PNG, BMP, JPEG, TIFF,
-and others used by multimedia applications. This library is developed by Hervé Drolon and Floris van den Berg.
-FreeImage is easy to use, fast, multithreading safe, compatible with all 32-bit or 64-bit versions of Windows,
-and cross-platform (works both with Linux and Mac OS X). FreeImage is optionally used by OCCT to work
-with images, on conditions of the FreeImage Public License (FIPL) (http://freeimage.sourceforge.net/freeimage-license.txt).
-
-**MikTEX** is up-to-date implementation of TeX/LaTeX and related programs for Windows. It is used
-for generation of User and Developer Guides in PDF format. See http://miktex.org for information
-on this tool.
-
-Adobe Systems, Inc. provides **Adobe Reader**, which can be used to view files in Portable Document Format (PDF).
-
-@section OCCT_OVW_SECTION_3 Documentation
-
-OCCT documentation is provided in several forms:
-
-- This overview provides general description of OCCT structure, functionality, modules, and features.
- It is available in HTML format (generated by Doxygen) and includes User and Developer Guides.
- The sources of this documentation are contained in **dox** subdirectory of OCCT sources
- (plain text format is used, with mixed MarkDown / Doxygen syntax mark-up).
-
-- User and Developer Guides describing in details OCCT modules and development tools are also available in
- Adobe Portable Document Format (PDF). To read this format, you need Adobe Acrobat Reader,
- which is a freeware and can be downloaded from the Adobe site.
-
-- Full reference documentation covering all OCCT classes generated automatically by Doxygen
- software is provided in HTML format, in a separate package.
- Reference documentation is presented in **Modules --> Toolkits --> Packages --> Classes**
- logic structure with cross-references to all OCCT classes and complete in-browser search by all classes.
-
-See @ref occt_dev_guides__documentation "OCCT Documentation Guide" for details on OCCT documentation system.
-
-**Generation of HTML documentation**
-
-To generate HTML documentation from sources contained in *dox* subdirectory,
-you need to have Tcl and Doxygen 1.8.4 (or above) installed on your system.
-
-In Tcl prompt, cd to OCCT root folder and run
-
- tclsh> source dox/start.tcl
-
-On Windows you can also run batch script **gendoc.bat**.
-
-
-**Generation of reference documentation**
-
-Reference documentation can be generated with help of WOK tool that
-is available for download from www.opencascade.org and dev.opencascade.org sites.
-
-Prerequisites:
-
- * Doxygen version 1.8.4 or higher
- * Graphviz version 2.28.0 or higher
-
-Run WOK (cd \<WOK_INSTALL_DIR\>/site folder):
-
-* Using WOK TCL shell:
- > wok_tclsh.sh
-
-* Using Emacs editor:
- > wok_emacs.sh
-
-In the WOK prompt, step into your workbench:
-
- > wokcd <your workbench>
-
-In your workbench, use **wgendoc** command with –h argument to get information about arguments of **wgendoc** command:
-
- > wgendoc -h
-
-then run **wgendoc** command with required arguments, for instance:
-
- > wgendoc -output=d:/occt/doc {-m=Draw Visualization}
-
-@section OCCT_OVW_SECTION_5 Requirements
-
-Open CASCADE Technology is designed to be highly portable and is known to
-work on wide range of platforms (UNIX, Linux, Windows, Mac OS X).
-Current version is officially certified on Windows (IA-32 and x86-64),
-Linux (x86-64) and MAC OS X (x86-64) platforms.
-
-The tables below describe the recommended hardware and software configurations
-for which OCCT is certified to work.
-
-@subsection OCCT_OVW_SECTION_5_1 Linux
-
-| Operating System | Mandriva 2010, CentOS 5.5, CentOS 6.3, Fedora 17, Fedora 18, Ubuntu-1304, Debian 6.0\* |
-| ----- | ----- |
-| Minimum memory | 512 MB, 1 GB recommended |
-| Free disk space (complete installation) | 600 MB approx. |
-| Video card | See \ref overview_req_graphics |
-| Graphic library | OpenGL 1.1+ (OpenGL 2.1+ is recommended)|
-| C++ | GNU gcc 4.0. - 4.7.3. |
-| TCL (for testing tools) | Tcltk 8.5 or 8.6 http://www.tcl.tk/software/tcltk/8.6.html |
-| Qt (for demonstration tools) | Qt 4.6.2 http://qt.nokia.com/downloads |
-| Freetype (for text rendering) | freetype-2.4.11 http://sourceforge.net/projects/freetype/files/ |
-| FreeImage (optional, for support of common 2D graphic formats) | FreeImage 3.15.4 http://sourceforge.net/projects/freeimage/files |
-| gl2ps (optional, for export contents of OCCT viewer to vector graphic files) | gl2ps-1.3.8 http://geuz.org/gl2ps/ |
-| Intel TBB (optional, for multithreaded algorithms) | TBB 3.x or 4.x http://www.threadingbuildingblocks.org/ |
-| OpenCL (optional, for ray tracing visualization) | OpenCL SDK (usually one provided by vendor of your graphic card) or OpenCL ICD Loader by Khronos group, http://www.khronos.org/registry/cl |
-
-* Debian 60 64 bit is a platform used for regular testing of contributions
-
-@subsection OCCT_OVW_SECTION_5_2 Windows
-
-| Operating System | Windows 8 / 7 SP1 / Vista SP2 / XP SP3 |
-| ----- | ----- |
-| Minimum memory | 512 MB, 1 GB recommended |
-| Free disk space (complete installation) | 600 MB approx. |
-| Video card | See \ref overview_req_graphics |
-| Graphic library | OpenGL 1.1+ (OpenGL 2.1+ is recommended)|
-| C++ | Microsoft Visual Studio: 2005 SP1, 2008 SP1\*, 2010 SP1, 2012 Update 3, 2013 <br>Intel C++ Composer XE 2013 SP1 |
-| TCL (for testing tools) | ActiveTcl 8.5 or 8.6 http://www.activestate.com/activetcl/downloads |
-| Qt (for demonstration tools) | Qt 4.6.2 http://qt.nokia.com/downloads |
-| Freetype (OCCT Text rendering) | freetype-2.4.11 http://sourceforge.net/projects/freetype/files/ |
-| FreeImage (Support of common graphic formats) | FreeImage 3.15.4 http://sourceforge.net/projects/freeimage/files |
-| gl2ps (Export contents of OCCT viewer to vector graphic file) | gl2ps-1.3.8 http://geuz.org/gl2ps/ |
-| Intel TBB (optional, for multithreaded algorithms) | TBB 3.x or 4.x http://www.threadingbuildingblocks.org/ |
-| OpenCL (optional, for ray tracing visualization) | OpenCL SDK (usually one provided by vendor of your graphic card) or OpenCL ICD Loader by Khronos group, http://www.khronos.org/registry/cl |
-
-* VC++ 9 32-bit is used for certification of contributions and for building
- binary package of official release of OCCT on Windows.
-
-@subsection OCCT_OVW_SECTION_5_3 MAC OS X
-
-| Operating System | Mac OS X 10.9 Mavericks / 10.8 Mountain Lion / 10.7 Lion / 10.6.8 Snow Leopard |
-| ----- | ----- |
-| Minimum memory | 512 MB, 1 GB recommended |
-| Free disk space (complete installation) | 600 MB approx. |
-| Video card | See \ref overview_req_graphics |
-| Graphic library | OpenGL 1.1+ (OpenGL 2.1+ is recommended)|
-| C++ | XCode 3.2 or newer (4.x is recommended) |
-| Qt (for demonstration tools) | Qt 4.6.2 http://qt.nokia.com/downloads |
-| Freetype (OCCT Text rendering) | freetype-2.4.11 http://sourceforge.net/projects/freetype/files/ |
-| FreeImage (Support of common graphic formats) | FreeImage 3.15.4 http://sourceforge.net/projects/freeimage/files |
-| gl2ps (Export contents of OCCT viewer to vector graphic file) | gl2ps-1.3.8 http://geuz.org/gl2ps/ |
-| Intel TBB (optional, for multithreaded algorithms) | TBB 3.x or 4.x http://www.threadingbuildingblocks.org/ |
-| OpenCL (optional, for ray tracing visualization) | Native OpenCL 1.2.8 |
-
-@subsection overview_req_graphics Graphic cards
-
-For 3d viewer, graphic card or software implementation supporting OpenGL 1.1
-or above is required. OpenGL 2.1+ is highly recommended.
-For ray tracing, hardware implementation of OpenCL 1.1+ is required.
-
-The following table lists graphic cards tested to work with OCCT.
-
-| Graphic card | Driver/GL/GLSL/CL version | OS | OpenGL (fixed pipeline) | OpenGL (shaders) | OpenCL (ray tracing) |
-| ---- | ---- | ---- | :----: | :----: | :----: |
-| NVIDIA GeForce GT 610, 630M, 640 | Driver 311.44, GL 4.3.0, GLSL 4.30 | Windows 7 64 bit | OK | OK | OK |
-| Intel(R) HD Graphics 3000 | GL 3.1.0, GLSL 1.40 | Windows 7 64 bit | OK | OK | none |
-| RadeOn 9600 | GL 2.1.8454, GLSL 1.20 | | OK | bad | none |
-| AMD/ATI RadeOn HD 7870 | Driver 6.14.10.12002, GL 4.2.12002, GLSL 4.20 | Windows 7 64-bit | OK | OK | OK |
-| Mesa 7.8.2 Windows GDI Driver\* | GL 2.1, GLSL version 1.20 | Mac OS X 10.6 / OS X 10.9 | OK | artifacts | none |
-| NVIDIA GeForce 320 | | Mac OS X 10.6 / OS X 10.9 | OK | OK | OK on OSX 10.6, bad on OSX 10.9 |
-| NVIDIA GeForce 6600 GT | GL 2.1.2, GLSL 1.20 | Windows XP 32-bit | OK | OK | none |
-| Apple software OpenGL | | Mac OS X 10.6 / OS X 10.9 | OK | OK | OK |
-
-* Mesa implementation of OpenGL is used for certification testing of OCCT
-
-@section OCCT_OVW_SECTION_4 Installation
-
-In most cases you need to rebuild OCCT on your platform (OS, compiler) before
-using it in your project, to ensure binary compatibility.
-See @ref occt_dev_guides__building for instructions on
-building OCCT from sources on supported platforms.
-
-@subsection OCCT_OVW_SECTION_4_1 Using Windows installer
-
-On Windows Open CASCADE Technology can be installed with binaries precompiled by
-Visual C++ 2008 with installation procedure.
-
-**Recommendation:**
-
-If you have a previous version of OCCT installed on your station,
-and you do not plan to use it along with the new version, you might want to uninstall
-the previous version (using Control Panel, Add/Remove Programs) before
-the installation of this new version, to avoid possible problems
-(conflict of system variables, paths, etc).
-
-**Attention:** For full installation OCCT requires approximately 650 Mb of disk space,
-but during the installation process you will need 1,2 Gb of free disk space.
-
-OCCT installation with reference documentation requires 1,4 Gb on disk.
-
- * Download the OCCT installer from OPEN CASCADE web site using the link. you have been provided
- * Launch the installer and follow the instructions.
-
-The includes and binaries of third-party libraries necessary for building and launching
-OCCT are included into binary distribution (built with Visual C++ 2008).
-When the installation is complete, you will find the directories for 3rd party products
-(some might be absent in case of custom installation) and the main **OCCT** directory:
-
-@image html /overview/images/overview_3rdparty.png
-@image latex /overview/images/overview_3rdparty.png
-
-The contents of the OCCT-6.7.0 directory (called further "OCCT root", or $CASROOT) are as follows:
-
-@image html /overview/images/overview_installation.png "The directory tree"
-@image latex /overview/images/overview_installation.png "The directory tree"
-
- * **adm** This folder contains administration files, which allow rebuilding OCCT;
- * **adm/cmake** This folder contains files of CMake building procedure;
- * **adm/msvc** This folder contains Visual Studio projects for Visual C++ 2005, 2008 and 2010, which allow rebuilding OCCT under Windows platform in 32 and 64-bit mode;
- * **data** This folder contains CAD files in different formats, which can be used to test the OCCT functionality;
- * **doc** This folder contains OCCT documentation in HTML and PDF format;
- * **dox** This folder contains sources of OCCT documentation in plain text (MarkDown) format;
- * **drv** This folder contains source files generated by WOK (private header files and instantiations of generic classes);
- * **inc** This folder contains all OCCT header files;
- * **samples** This folder contains sample applications.
- * **src** This folder contains OCCT source files. They are organized in folders, one per development unit;
- * **tests** This folder contains scripts for OCCT testing.
- * **win32/vc9** This folder contains executable and library files built in optimize mode for Windows platform by Visual C++ 2008;
-
-@section OCCT_OVW_SECTION_4_2 Environment Variables
-
-To run any Open CASCADE Technology application you need to set the environment variables.
-
-### On Windows
-
-You can define the environment variables with env.bat script located in the
-$CASROOT folder. This script accepts two arguments to be used:
-the version of Visual Studio (vc8 - vc12) and the architecture (win32 or win64).
-
-The additional environment settings necessary for compiling OCCT libraries and samples
-by Microsoft Visual Studio can be set using script custom.bat located in the same folder.
-You might need to edit this script to correct the paths to third-party libraries
-if they are installed on your system in a non-default location.
-
-Script msvc.bat can be used with the same arguments for immediate launch of Visual Studio for (re)compiling OCCT.
-
-### On Unix
-
-
- If OCCT was built by Code::Blocks, you can define the environment variables with env_cbp.sh or custom_cbp.sh script.
-
- If OCCT was built by Automake, you can define the environment variables with env_amk.sh or custom_amk.sh script.
-
-The scripts are located in the OCCT root folder.
-
-
-### Description of system variables:
-
-
- * **CASROOT** is used to define the root directory of Open CASCADE Technology;
- * **PATH** is required to define the path to OCCT binaries and 3rdparty folder;
- * **LD_LIBRARY_PATH** is required to define the path to OCCT libraries (on UNIX platforms only);
- * **MMGT_OPT** (optional) if set to 1, the memory manager performs optimizations as described below; if set to 2,
- Intel (R) TBB optimized memory manager is used; if 0 (default), every memory block is allocated
- in C memory heap directly (via malloc() and free() functions).
- In the latter case, all other options except MMGT_CLEAR and MMGT_REENTRANT are ignored;
- * **MMGT_CLEAR** (optional) if set to 1 (default), every allocated memory block is cleared by zeros;
- if set to 0, memory block is returned as it is;
- * **MMGT_CELLSIZE** (optional) defines the maximal size of blocks allocated in large pools of memory. Default is 200;
- * **MMGT_NBPAGES** (optional) defines the size of memory chunks allocated for small blocks in pages
- (operating-system dependent). Default is 10000;
- * **MMGT_THRESHOLD** (optional) defines the maximal size of blocks that are recycled internally
- instead of being returned to the heap. Default is 40000;
- * **MMGT_MMAP** (optional) when set to 1 (default), large memory blocks are allocated using
- memory mapping functions of the operating system; if set to 0,
- they will be allocated in the C heap by malloc();
- * **CSF_LANGUAGE** is required to define the default language of messages;
- * **CSF_DEBUG** (optional, Windows only): if defined then a diagnostic message is displayed in case of an exception;
- * **CSF_DEBUG_BOP** (optional): if defined then it should specify directory where diagnostic data on problems occured in Boolean operations will be saved;
- * **CSF_MDTVTexturesDirectory** defines the directory for available textures when using texture mapping;
- * **CSF_ShadersDirectory** defines the directory for GLSL programs (required for advanced rendering techniques and custom shaders);
- * **CSF_UnitsDefinition** and **CSF_UnitsLexicon** should define paths to resource files Lexi_Expr.dat and Units.dat, respectively, required for support of measurement units;
- * **CSF_SHMessage** is required in order to define the path to the messages file for *ShapeHealing*;
- * **CSF_XSMessage** is required in order to define the path to the messages file for **STEP** and **IGES** translators;
- * **CSF_StandardDefaults** and **CSF_PluginDefaults** are required in order to maintain CASCADE Persistence mechanism to make possible any open/save operations with OCAF documents;
- * **CSF_StandardLiteDefaults** is required in order to maintain *OCCT Persistence mechanism* to make possible any open/save operations with Lite OCAF documents;
- * **CSF_XCAFDefaults** any open/save operations for **XDE** documents;
- * **CSF_IGESDefaults** and **CSF_STEPDefaults** are required for **IGES** and **STEP** translators correspondingly in order to define the path to the resource files;
- * **CSF_XmlOcafResource** is required in order to set the path to **XSD** resources, which defines XML grammar.
- * **CSF_MIGRATION_TYPES** is required in order to read documents that contain old data types, such as *TDataStd_Shape*;
- * **TCLLIBPATH**, **TCL_LIBRARY**, **TK_LIBRARY** and **TIX_LIBRARY** are required to allow work with **DRAW** and **WOK**.
-
-@section OCCT_OVW_SECTION_7 Getting Started
-
-@subsection OCCT_OVW_SECTION_7_1 Draw Test Harness
-
-Draw is a command interpreter based on TCL and a graphical system used for testing and demonstrating OCCT modeling libraries.
-
-Draw can be used interactively to create, display and modify objects such as curves, surfaces and topological shapes.
-
-@image html /overview/images/overview_draw.png
-@image latex /overview/images/overview_draw.png
-
-Scripts can be written to customize Draw and perform tests.
-New types of objects and new commands can be added using C++ programming language.
-
-Draw contains:
-
- * A command interpreter based on TCL command language.
- * A 2D an 3D graphic viewer with support of operations such as zoom, pan, rotation and full-screen views.
- * An optional set of geometric commands to create and modify curves and surfaces and to use OCCT geometry algorithms.
- * A set of topological commands to create and modify BRep shapes and to use OCCT topology algorithms.
- * A set of graphic commands for view and display operations including Mesh Visualization Service.
- * A set of Application framework commands for handling of files and attributes.
- * A set of Data Exchange commands for translation of files from various formats (IGES,STEP) into OCCT shapes.
- * A set of Shape Healing commands: check of overlapping edges, approximation of a shape to BSpline, etc.
-
-You can add new custom test harness commands to Draw in order to test
-or demonstrate a new functionality, which you are developing.
-
-Currently DRAW Test Harness is a single executable called DRAWEXE.
-
-Commands grouped in toolkits can be loaded at run-time thereby implementing dynamically loaded plug-ins.
-Thus you can work only with the commands that suit your needs adding
-the commands dynamically without leaving the Test Harness session.
-
-Declaration of available plug-ins is done through special resource file(s).
-The pload command loads the plug-in in accordance with
-the specified resource file and activates the commands implemented in the plug-in.
-
-The whole process of using the plug-in mechanism as well as the instructions for extending Test Harness is described in the @ref occt_user_guides__test_harness.
-
-Draw Test Harness provides an environment for OCCT automated testing system.
-Please, consult its @ref occt_dev_guides__tests "Automated Testing System" for details.
-
-Remarks:
-
-* The DRAWEXE executable is delivered with the installation procedure on Windows platform only.
-* To start it, launch DRAWEXE executable from Open CASCADE Technology/Draw Test Harness item of the Start\\Programs menu.
-
-@subsection OCCT_OVW_SECTION_7_2 Experimenting with Draw Test Harness
-
- Running Draw
-------------
-
-**On Linux:**
-
-1. If OCCT was built by Code::Blocks use <i>$CASROOT/draw_cbp.sh</i> file to launch *DRAWEXE* executable;
-2. If OCCT was built by Automake use <i>$CASROOT/draw_amk.sh</i> file to launch *DRAWEXE* executable;
-
-Draw[1]> prompt appears in the command window
-
-Type *pload ALL*
-
-**On Windows:**
-
-Launch Draw executable from Open CASCADE Technology\\Test Harness\\Draw Test Harness
-item of the Start\\Programs menu or Use <i>$CASROOT\\draw.bat</i> file to launch *DRAWEXE* executable.
-
-Draw[1]> prompt appears in the command window
-
-Type pload ALL
-
-**Creating your first geometric objects**
-
-1. In the command window, type *axo* to create an axonometric view
-2. Type *box b -10 -10 -10 20 20 20* to create a cube *b* of size 20, parallel to the X Y Z axis and centered on the origin. The cube will be displayed in the axonometric view in wireframe mode.
-3. Type *fit* to fill the viewer with the cube
-4. Type *pcylinder c 2 30* to create a cylinder *c* of radius 2 and height 30. The cylinder will be displayed in addition to the cube
-
-**Manipulating the view**
-
-1. Type *clear* to erase the view
-2. Type *donly c* to display the cylinder only
-3. Type *donly b* to display the cube only
-4. Type *hlr hlr b* to display the cube in the hidden line removal mode
-
-**Running demonstration files**
-
-1. Type *cd ../..* to return to the root directory
-2. Type *cd samples/tcl* to reach the *DrawResources* directory
-3. Type *source \<demo_file\>* to run the demonstration file provided with Open CASCADE. The following demonstration files are available:
- * DataExchangeDemo.tcl: demonstrates sample sequence of operations with writing and reading IGES file
- * ModelingDemo.tcl: demonstrates creation of simple shape and displaying it in HLR mode
- * VisualizationDemo.tcl: demonstrates use of 3d viewer
- * challenge.tcl: creates solid shape looking like abbreviation "CAD"
- * bottle.tcl: creates bottle as in OCCT Tutorial
- * drill.tcl: creates twist drill bit shape
- * mill.tcl: creates milling cutter shape
- * raytrace.tcl: demonstrates use of ray tracing display in 3d viewer
-
-**Getting Help**
-
-1. Type *help* to see all available commands
-2. Type *help \<command_name\>* to find out the arguments for a given command
-
-@subsection OCCT_OVW_SECTION_7_3 Programming Samples
-
-@subsubsection OCCT_OVW_SECTION_7_3_1 MFC
-
-Visual C++ programming samples containing 10 Visual C++ projects
-illustrating how to use a particular module or functionality.
-
-The list of MFC samples:
-
- * Geometry
- * Modeling
- * Viewer2d
- * Viewer3d
- * ImportExport
- * Ocaf
- * Triangulation
- * HLR
- * Animation
- * Convert
-
-@image html /overview/images/overview_mvc.png
-@image latex /overview/images/overview_mvc.png
-
-**Remarks:**
-
- * MFC samples are available only on Windows platform;
- * To start a sample use Open CASCADE Technology\\Samples\\Mfc\\ item of the Start\\Programs menu;
- * Read carefully readme.txt to learn about launching and compilation options.
-
-See \subpage samples_mfc_standard "Readme" for details.
-
-@subsubsection OCCT_OVW_SECTION_7_3_2 Qt
-
-OCCT contains three samples based on Qt application framework
-
- Import Export
--------------
-
- Import Export programming sample contains 3D Viewer and Import / Export functionality.
-
-@image html /overview/images/overview_qt.png
-@image latex /overview/images/overview_qt.png
-
- Tutorial
----------
-
-The Qt programming tutorial teaches how to use Open CASCADE Technology services to model a 3D object.
-The purpose of the tutorial is not to explain all OCCT classes but
-to help start thinking in terms of the Open CASCADE Technology.
-
-This tutorial assumes that the user has experience in using and setting up C++.
-From the viewpoint of programming, Open CASCADE Technology is designed
-to enhance user's C++ tools with high performance modeling classes, methods and functions.
-The combination of these resources allows creating substantial applications.
-
-**See also:** @ref occt__tutorial "OCCT Tutorial"
-
- Voxel
-------
-
-This is a demonstration application showing OCCT voxel models. It also includes a set of non-regression tests and other commands for testing this functionality (accessible only through TEST pre-processor definition).
-
-**See also:** <a href="occt_voxels_wp.html">Voxels User's guide</a>
-
-**Remarks:**
-
- * Qt samples are available on all supported platforms;
- * To start a sample on Windows use Open CASCADE Technology\\Samples\\Qt\\ item of the Start\\Programs menu.
-
-@subsubsection OCCT_OVW_SECTION_7_3_3 C#
-
-C# sample demonstrates integration of OCCT 3D Viewer and Import / Export functionality into .NET applications (using Windows Forms and WPF front ends).
-
-@image html /overview/images/overview_c__ie.png
-@image latex /overview/images/overview_c__ie.png
-
-Import:
-
- * BRep
- * Iges
- * Step
-
-Export:
-
- * Brep
- * Iges
- * Step
- * Stl
- * Vrml
-
-See \subpage samples_csharp "Readme" for details.
-
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