0024428: Implementation of LGPL license
[occt.git] / dox / overview / Overview.md
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765b3e07 1Overview {#mainpage}
2========
3
e5bd0d98 4@tableofcontents
765b3e07 5
e5bd0d98 6@section OCCT_OVW_SECTION_1 Welcome
765b3e07 7
e5bd0d98 8Welcome to Open CASCADE Technology (OCCT), a collection
9of C++ libraries providing services for 3D surface and solid modeling, CAD data
10exchange, and visualization. OCCT can be best applied in development of
11software dealing with 3D modeling (CAD), manufacturing / measuring (CAM) or
12numerical simulation (CAE).
765b3e07 13
e5bd0d98 14@htmlonly<center>@endhtmlonly
15http://www.opencascade.org
765b3e07 16@image html /resources/occt_logo.png
17@image latex /resources/occt_logo.png
765b3e07 18@htmlonly</center>@endhtmlonly
19
20@section OCCT_OVW_SECTION_2 Copyrights
21
22Copyright(c) 2001-2013 by OPEN CASCADE S.A.S. All rights reserved.
23
e5bd0d98 24@htmlonly<center>@endhtmlonly
25http://www.opencascade.com
26@image html /resources/occ_logo.png
27@image latex /resources/occ_logo.png
28@htmlonly</center>@endhtmlonly
29
765b3e07 30 Trademark information
31----------------------
32
33You are hereby informed that all software is a property of its respective authors and is protected by
34international and domestic laws on intellectual property and trademarks.
35Should you need further information, please directly contact the authors.
36
79d580f2 37**CAS.CADE** and **Open CASCADE** are registered trademarks of
38OPEN CASCADE S.A.S.
39
40**Linux** is a registered trademark of Linus Torvalds.
41
42**Windows** is a registered trademark of Microsoft Corporation in the United States and other countries.
43
44**Mac** and the Mac logo, **OpenCL** and the OpenCL logo, are trademarks of
45Apple Inc., registered in the U.S. and other countries.
765b3e07 46
e5bd0d98 47 Acknowledgements
765b3e07 48------------------
49
50The following parties are acknowledged for producing tools which are used within
51Open CASCADE Technology libraries or for release preparation.
52
53You are hereby informed that all rights to the software listed below belong to its respective
54authors and such software may not be freely available and/or be free of charge for any kind
55of use or purpose. We strongly recommend that you carefully read the license of these products
56and, in case you need any further information, directly contact their authors.
57
58**Qt** is a cross-platform application framework that is widely used for developing application software
59with graphical user interface (GUI). Qt is free and open source software distributed under
60the terms of the GNU Lesser General Public License. In OCCT Qt is used for programming samples.
e5bd0d98 61If you need further information on Qt, please, refer to Qt Homepage (http://qt.digia.com).
765b3e07 62
63**Tcl** is a high-level programming language. Tk is a graphical user interface (GUI) toolkit,
64with buttons, menus, listboxes, scrollbars, and so on. Taken together Tcl and Tk provide a solution
65to develop cross-platform graphical user interfaces with a native look and feel. Tcl/Tk is under copyright by
66Scriptics Corp., Sun Microsystems, and other companies. However, Tcl/Tk is an open source, and
67the copyright allows you to use, modify, and redistribute Tcl/Tk for any purpose, without an
68explicit license agreement and without paying any license fees or royalties.
69To use Tcl/Tk, please refer to the Licensing Terms (http://www.tcl.tk/software/tcltk/license.html).
70
71**Robert Boehne** has developed **GNU Autoconf**, **Automake** and **Libtool** scripts and makefiles
72for the Open CASCADE project http://sourceforge.net/projects/autoopencas/,
73which became an initial groundwork for the build scripts based on respective GNU tools
74(autoconf, automake and libtool) in Open CASCADE Technology version 4.0.
75These scripts are now maintained by the OPEN CASCADE company.
76
e5bd0d98 77**GL2PS** is developed by Christophe Geuzaine and others. It is optionally used by OCCT to
78export content of OpenGL scene to vector graphics formats (PS, PDF, EMF, SVG).
765b3e07 79The library is licensed under GL2PS LICENSE http://www.geuz.org/gl2ps/COPYING.GL2PS Version 2, November 2003.
80
81**FreeType 2** is developed by Antoine Leca, David Turner, Werner Lemberg and others.
82It is a software font engine that is designed to be small, efficient, highly customizable and
83portable while capable of producing high-quality output (glyph images). This product
84can be used in graphic libraries, display servers, font conversion tools,
85text image generation tools, and many other products.
86
87FreeType 2 is released under two open-source licenses: BSD-like FreeType License and the GPL.
88
89**Intel(R) Threading Building Blocks (TBB)** offers a rich and complete approach to expressing parallelism in a C++ program.
90It is a library that helps you to take advantage of multi-core processor performance without having to be a threading expert.
91Threading Building Blocks is not just a threads-replacement library. It represents a higher-level, task-based parallelism that
92abstracts platform details and threading mechanisms for scalability and performance.
93TBB is available under GPLv2 license with the runtime exception.
94
e5bd0d98 95Open CASCADE Technology WOK module on Windows also makes use of LGPL-licensed C routines **regexp**
96and **getopt**, taken from GNU C library.
765b3e07 97
79d580f2 98**OpenGL** is an industry standard API for 3D graphics used by OCCT for
99implementation of 3D viewer. OpenGL specification is developed by the
100Khronos group, http://www.khronos.org/opengl/. OCCT code includes header
101file *glext.h* obtained from Khronos web site.
102
103**OpenCL** (Open Computing Language) is open, royalty-free standard for
104cross-platform, parallel programming of modern processors, optionally used by
105OCCT for ray tracing. OpenCL specification is developed by the
106Khronos group, http://www.khronos.org/opencl/. The implementations of OpenCL
107are available from Apple, AMD, NVIDIA, Intel, and other vendors.
108**OpenCL Installable Client Driver (ICD) Loader** is a library provided by
109Khronos group which allows dispatching OpenCL calls to underlying
110implementation.
111
e5bd0d98 112**Doxygen** developed by Dimitri van Heesch is open source documentation system for
765b3e07 113C++, C, Java, Objective-C, Python, IDL, PHP and C#. This product is used in Open CASCADE Technology
114for automatic creation of Technical Documentation from C++ header files.
115If you need further information on Doxygen, please refer to http://www.stack.nl/~dimitri/doxygen/index.html.
116
117**Graphviz** is open source graph visualization software developed by John Ellson, Emden Gansner, Yifan Hu and Arif Bilgin.
118Graph visualization is representiation of structured information as diagrams of abstract graphs and networks.
119This product is used together with Doxygen in Open CASCADE Technology for automatic creation of Technical Documentation
120(generation of dependency graphs). Current versions of Graphviz are licensed on an open source
e5bd0d98 121basis under The Eclipse Public License (EPL) (http://www.graphviz.org/License.php).
765b3e07 122
123**Inno Setup** is a free script-driven installation system created in CodeGear Delphi by Jordan Russell.
124In OCCT Inno Setup is used to create Installation Wizard on Windows.
125It is licensed under Inno Setup License (http://www.jrsoftware.org/files/is/license.txt).
126
e5bd0d98 127**FreeImage** is an Open Source library supporting popular graphics image formats, such as PNG, BMP, JPEG, TIFF,
765b3e07 128and others used by multimedia applications. This library is developed by Hervé Drolon and Floris van den Berg.
129FreeImage is easy to use, fast, multithreading safe, compatible with all 32-bit or 64-bit versions of Windows,
e5bd0d98 130and cross-platform (works both with Linux and Mac OS X). FreeImage is optionally used by OCCT to work
131with images, on conditions of the FreeImage Public License (FIPL) (http://freeimage.sourceforge.net/freeimage-license.txt).
765b3e07 132
e5bd0d98 133**MikTEX** is up-to-date implementation of TeX/LaTeX and related programs for Windows. It is used
134for generation of User and Developer Guides in PDF format. See http://miktex.org for information
135on this tool.
765b3e07 136
e5bd0d98 137Adobe Systems, Inc. provides **Adobe Reader**, which can be used to view files in Portable Document Format (PDF).
765b3e07 138
e5bd0d98 139@section OCCT_OVW_SECTION_3 Documentation
765b3e07 140
e5bd0d98 141OCCT documentation is provided in several forms:
765b3e07 142
e5bd0d98 143- This overview provides general description of OCCT structure, functionality, modules, and features.
144 It is available in HTML format (generated by Doxygen) and includes User and Developer Guides.
145 The sources of this documentation are contained in **dox** subdirectory of OCCT sources
146 (plain text format is used, with mixed MarkDown / Doxygen syntax mark-up).
765b3e07 147
e5bd0d98 148- User and Developer Guides describing in details OCCT modules and development tools are also available in
149 Adobe Portable Document Format (PDF). To read this format, you need Adobe Acrobat Reader,
150 which is a freeware and can be downloaded from the Adobe site.
765b3e07 151
e5bd0d98 152- Full reference documentation covering all OCCT classes generated automatically by Doxygen
153 software is provided in HTML format, in a separate package.
154 Reference documentation is presented in **Modules --> Toolkits --> Packages --> Classes**
155 logic structure with cross-references to all OCCT classes and complete in-browser search by all classes.
765b3e07 156
e5bd0d98 157See @ref dev_guides__documentation "OCCT Documentation Guide" for details on OCCT documentation system.
765b3e07 158
e5bd0d98 159**Generation of HTML documentation**
765b3e07 160
e5bd0d98 161To generate HTML documentation from sources contained in *dox* subdirectory,
162you need to have Tcl and Doxygen 1.8.4 (or above) installed on your system.
163
164In Tcl prompt, cd to OCCT root folder and run
165
166 tclsh> source dox/start.tcl
167
168On Windows you can also run batch script **gendoc.bat**.
169
170
171**Generation of reference documentation**
172
173Reference documentation can be generated with help of WOK tool that
174is available for download from www.opencascade.org and dev.opencascade.org sites.
765b3e07 175
176Prerequisites:
177
e5bd0d98 178 * Doxygen version 1.8.4 or higher
765b3e07 179 * Graphviz version 2.28.0 or higher
180
181Run WOK (cd \<WOK_INSTALL_DIR\>/site folder):
182
183* Using WOK TCL shell:
184 > wok_tclsh.sh
185
186* Using Emacs editor:
187 > wok_emacs.sh
188
189In the WOK prompt, step into your workbench:
190
e5bd0d98 191 > wokcd <your workbench>
765b3e07 192
193In your workbench, use **wgendoc** command with –h argument to get information about arguments of **wgendoc** command:
194
e5bd0d98 195 > wgendoc -h
765b3e07 196
e5bd0d98 197then run **wgendoc** command with required arguments, for instance:
765b3e07 198
e5bd0d98 199 > wgendoc -output=d:/occt/doc {-m=Draw Visualization}
765b3e07 200
201@section OCCT_OVW_SECTION_5 Requirements
202
62afa5c9 203Open CASCADE Technology is designed to be highly portable and is known to
204work on wide range of platforms (UNIX, Linux, Windows, Mac OS X).
205Current version is officially certified on Windows (IA-32 and x86-64),
206Linux (x86-64) and MAC OS X (x86-64) platforms.
207
208The tables below describe the recommended hardware and software configurations
209for which OCCT is certified to work.
210
211@subsection OCCT_OVW_SECTION_5_1 Linux
212
213| Operating System | Mandriva 2010, CentOS 5.5, CentOS 6.3, Fedora 17, Fedora 18, Ubuntu-1304, Debian 6.0\* |
214| ----- | ----- |
215| Minimum memory | 512 MB, 1 GB recommended |
216| Free disk space (complete installation) | 600 MB approx. |
217| Video card | See \ref overview_req_graphics |
218| Graphic library | OpenGL 1.1+ (OpenGL 2.1+ is recommended)|
219| C++ | GNU gcc 4.0. - 4.7.3. |
220| TCL (for testing tools) | Tcltk 8.5 or 8.6 http://www.tcl.tk/software/tcltk/8.6.html |
221| Qt (for demonstration tools) | Qt 4.6.2 http://qt.nokia.com/downloads |
222| Freetype (for text rendering) | freetype-2.4.11 http://sourceforge.net/projects/freetype/files/ |
223| FreeImage (optional, for support of common 2D graphic formats) | FreeImage 3.15.4 http://sourceforge.net/projects/freeimage/files |
224| gl2ps (optional, for export contents of OCCT viewer to vector graphic files) | gl2ps-1.3.8 http://geuz.org/gl2ps/ |
225| Intel TBB (optional, for multithreaded algorithms) | TBB 3.x or 4.x http://www.threadingbuildingblocks.org/ |
79d580f2 226| 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 |
62afa5c9 227
228* Debian 60 64 bit is a platform used for regular testing of contributions
229
230@subsection OCCT_OVW_SECTION_5_2 Windows
231
232| Operating System | Windows 8 / 7 SP1 / Vista SP2 / XP SP3 |
233| ----- | ----- |
234| Minimum memory | 512 MB, 1 GB recommended |
235| Free disk space (complete installation) | 600 MB approx. |
236| Video card | See \ref overview_req_graphics |
237| Graphic library | OpenGL 1.1+ (OpenGL 2.1+ is recommended)|
238| C++ | Microsoft Visual Studio: 2005 SP1, 2008 SP1\*, 2010 SP1, 2012 Update 3, 2013 <br>Intel C++ Composer XE 2013 SP1 |
239| TCL (for testing tools) | ActiveTcl 8.5 or 8.6 http://www.activestate.com/activetcl/downloads |
240| Qt (for demonstration tools) | Qt 4.6.2 http://qt.nokia.com/downloads |
241| Freetype (OCCT Text rendering) | freetype-2.4.11 http://sourceforge.net/projects/freetype/files/ |
242| FreeImage (Support of common graphic formats) | FreeImage 3.15.4 http://sourceforge.net/projects/freeimage/files |
243| gl2ps (Export contents of OCCT viewer to vector graphic file) | gl2ps-1.3.8 http://geuz.org/gl2ps/ |
79d580f2 244| Intel TBB (optional, for multithreaded algorithms) | TBB 3.x or 4.x http://www.threadingbuildingblocks.org/ |
245| 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 |
62afa5c9 246
247* VC++ 9 32-bit is used for certification of contributions and for building
248 binary package of official release of OCCT on Windows.
765b3e07 249
250@subsection OCCT_OVW_SECTION_5_3 MAC OS X
251
62afa5c9 252| Operating System | Mac OS X 10.9 Mavericks / 10.8 Mountain Lion / 10.7 Lion / 10.6.8 Snow Leopard |
253| ----- | ----- |
254| Minimum memory | 512 MB, 1 GB recommended |
255| Free disk space (complete installation) | 600 MB approx. |
256| Video card | See \ref overview_req_graphics |
257| Graphic library | OpenGL 1.1+ (OpenGL 2.1+ is recommended)|
258| C++ | XCode 3.2 or newer (4.x is recommended) |
259| Qt (for demonstration tools) | Qt 4.6.2 http://qt.nokia.com/downloads |
260| Freetype (OCCT Text rendering) | freetype-2.4.11 http://sourceforge.net/projects/freetype/files/ |
261| FreeImage (Support of common graphic formats) | FreeImage 3.15.4 http://sourceforge.net/projects/freeimage/files |
262| gl2ps (Export contents of OCCT viewer to vector graphic file) | gl2ps-1.3.8 http://geuz.org/gl2ps/ |
79d580f2 263| Intel TBB (optional, for multithreaded algorithms) | TBB 3.x or 4.x http://www.threadingbuildingblocks.org/ |
264| OpenCL (optional, for ray tracing visualization) | Native OpenCL 1.2.8 |
62afa5c9 265
266@subsection overview_req_graphics Graphic cards
267
268For 3d viewer, graphic card or software implementation supporting OpenGL 1.1
269or above is required. OpenGL 2.1+ is highly recommended.
270For ray tracing, hardware implementation of OpenCL 1.1+ is required.
271
272The following table lists graphic cards tested to work with OCCT.
273
79d580f2 274| Graphic card | Driver/GL/GLSL/CL version | OS | OpenGL (fixed pipeline) | OpenGL (shaders) | OpenCL (ray tracing) |
62afa5c9 275| ---- | ---- | ---- | :----: | :----: | :----: |
79d580f2 276| NVIDIA GeForce GT 610, 630M, 640 | Driver 311.44, GL 4.3.0, GLSL 4.30 | Windows 7 64 bit | OK | OK | OK |
62afa5c9 277| Intel(R) HD Graphics 3000 | GL 3.1.0, GLSL 1.40 | Windows 7 64 bit | OK | OK | none |
278| RadeOn 9600 | GL 2.1.8454, GLSL 1.20 | | OK | bad | none |
79d580f2 279| AMD/ATI RadeOn HD 7870 | Driver 6.14.10.12002, GL 4.2.12002, GLSL 4.20 | Windows 7 64-bit | OK | OK | OK |
62afa5c9 280| 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 |
79d580f2 281| NVIDIA GeForce 320 | | Mac OS X 10.6 / OS X 10.9 | OK | OK | OK on OSX 10.6, bad on OSX 10.9 |
282| NVIDIA GeForce 6600 GT | GL 2.1.2, GLSL 1.20 | Windows XP 32-bit | OK | OK | none |
62afa5c9 283| Apple software OpenGL | | Mac OS X 10.6 / OS X 10.9 | OK | OK | OK |
284
285* Mesa implementation of OpenGL is used for certification testing of OCCT
765b3e07 286
287@section OCCT_OVW_SECTION_4 Installation
288
e5bd0d98 289In most cases you need to rebuild OCCT on your platform (OS, compiler) before
290using it in your project, to ensure binary compatibility.
291See @ref dev_guides__building for instructions on
292building OCCT from sources on supported platforms.
765b3e07 293
e5bd0d98 294@subsection OCCT_OVW_SECTION_4_1 Using Windows installer
765b3e07 295
e5bd0d98 296On Windows Open CASCADE Technology can be installed with binaries precompiled by
297Visual C++ 2008 with installation procedure.
765b3e07 298
299**Recommendation:**
300
301If you have a previous version of OCCT installed on your station,
302and you do not plan to use it along with the new version, you might want to uninstall
303the previous version (using Control Panel, Add/Remove Programs) before
304the installation of this new version, to avoid possible problems
305(conflict of system variables, paths, etc).
306
307**Attention:** For full installation OCCT requires approximately 650 Mb of disk space,
308but during the installation process you will need 1,2 Gb of free disk space.
309
310OCCT installation with reference documentation requires 1,4 Gb on disk.
311
312 * Download the OCCT installer from OPEN CASCADE web site using the link. you have been provided
313 * Launch the installer and follow the instructions.
314
765b3e07 315The includes and binaries of third-party libraries necessary for building and launching
316OCCT are included into binary distribution (built with Visual C++ 2008).
e5bd0d98 317When the installation is complete, you will find the directories for 3rd party products
318(some might be absent in case of custom installation) and the main **OCCT** directory:
765b3e07 319
e5bd0d98 320@image html /overview/images/overview_3rdparty.png
321@image latex /overview/images/overview_3rdparty.png
765b3e07 322
e5bd0d98 323The contents of the OCCT-6.7.0 directory (called further "OCCT root", or $CASROOT) are as follows:
765b3e07 324
325@image html /overview/images/overview_installation.png "The directory tree"
326@image latex /overview/images/overview_installation.png "The directory tree"
327
765b3e07 328 * **adm** This folder contains administration files, which allow rebuilding OCCT;
329 * **adm/cmake** This folder contains files of CMake building procedure;
330 * **adm/msvc** This folder contains Visual Studio projects for Visual C++ 2005, 2008 and 2010, which allow rebuilding OCCT under Windows platform in 32 and 64-bit mode;
e5bd0d98 331 * **data** This folder contains CAD files in different formats, which can be used to test the OCCT functionality;
332 * **doc** This folder contains OCCT documentation in HTML and PDF format;
333 * **dox** This folder contains sources of OCCT documentation in plain text (MarkDown) format;
765b3e07 334 * **drv** This folder contains source files generated by WOK (private header files and instantiations of generic classes);
335 * **inc** This folder contains all OCCT header files;
336 * **samples** This folder contains sample applications.
337 * **src** This folder contains OCCT source files. They are organized in folders, one per development unit;
338 * **tests** This folder contains scripts for OCCT testing.
339 * **win32/vc9** This folder contains executable and library files built in optimize mode for Windows platform by Visual C++ 2008;
340
e5bd0d98 341@section OCCT_OVW_SECTION_4_2 Environment Variables
765b3e07 342
343To run any Open CASCADE Technology application you need to set the environment variables.
344
345### On Windows
346
765b3e07 347You can define the environment variables with env.bat script located in the
e5bd0d98 348$CASROOT folder. This script accepts two arguments to be used:
349the version of Visual Studio (vc8 - vc12) and the architecture (win32 or win64).
765b3e07 350
351The additional environment settings necessary for compiling OCCT libraries and samples
352by Microsoft Visual Studio can be set using script custom.bat located in the same folder.
353You might need to edit this script to correct the paths to third-party libraries
354if they are installed on your system in a non-default location.
355
356Script msvc.bat can be used with the same arguments for immediate launch of Visual Studio for (re)compiling OCCT.
357
358### On Unix
359
360
361 If OCCT was built by Code::Blocks, you can define the environment variables with env_cbp.sh or custom_cbp.sh script.
362
363 If OCCT was built by Automake, you can define the environment variables with env_amk.sh or custom_amk.sh script.
364
e5bd0d98 365The scripts are located in the OCCT root folder.
765b3e07 366
367
368### Description of system variables:
369
370
371 * **CASROOT** is used to define the root directory of Open CASCADE Technology;
372 * **PATH** is required to define the path to OCCT binaries and 3rdparty folder;
373 * **LD_LIBRARY_PATH** is required to define the path to OCCT libraries (on UNIX platforms only);
e5bd0d98 374 * **MMGT_OPT** (optional) if set to 1, the memory manager performs optimizations as described below; if set to 2,
375 Intel (R) TBB optimized memory manager is used; if 0 (default), every memory block is allocated
376 in C memory heap directly (via malloc() and free() functions).
377 In the latter case, all other options except MMGT_CLEAR and MMGT_REENTRANT are ignored;
378 * **MMGT_CLEAR** (optional) if set to 1 (default), every allocated memory block is cleared by zeros;
379 if set to 0, memory block is returned as it is;
380 * **MMGT_CELLSIZE** (optional) defines the maximal size of blocks allocated in large pools of memory. Default is 200;
381 * **MMGT_NBPAGES** (optional) defines the size of memory chunks allocated for small blocks in pages
382 (operating-system dependent). Default is 10000;
383 * **MMGT_THRESHOLD** (optional) defines the maximal size of blocks that are recycled internally
384 instead of being returned to the heap. Default is 40000;
385 * **MMGT_MMAP** (optional) when set to 1 (default), large memory blocks are allocated using
386 memory mapping functions of the operating system; if set to 0,
387 they will be allocated in the C heap by malloc();
765b3e07 388 * **CSF_LANGUAGE** is required to define the default language of messages;
e5bd0d98 389 * **CSF_DEBUG** (optional, Windows only): if defined then a diagnostic message is displayed in case of an exception;
62afa5c9 390 * **CSF_DEBUG_BOP** (optional): if defined then it should specify directory where diagnostic data on problems occured in Boolean operations will be saved;
765b3e07 391 * **CSF_MDTVTexturesDirectory** defines the directory for available textures when using texture mapping;
e5bd0d98 392 * **CSF_UnitsDefinition** and **CSF_UnitsLexicon** should define paths to resource files Lexi_Expr.dat and Units.dat, respectively, required for support of measurement units;
765b3e07 393 * **CSF_SHMessage** is required in order to define the path to the messages file for *ShapeHealing*;
394 * **CSF_XSMessage** is required in order to define the path to the messages file for **STEP** and **IGES** translators;
e5bd0d98 395 * **CSF_StandardDefaults** and **CSF_PluginDefaults** are required in order to maintain CASCADE Persistence mechanism to make possible any open/save operations with OCAF documents;
765b3e07 396 * **CSF_StandardLiteDefaults** is required in order to maintain *OCCT Persistence mechanism* to make possible any open/save operations with Lite OCAF documents;
397 * **CSF_XCAFDefaults** any open/save operations for **XDE** documents;
765b3e07 398 * **CSF_IGESDefaults** and **CSF_STEPDefaults** are required for **IGES** and **STEP** translators correspondingly in order to define the path to the resource files;
399 * **CSF_XmlOcafResource** is required in order to set the path to **XSD** resources, which defines XML grammar.
e5bd0d98 400 * **CSF_MIGRATION_TYPES** is required in order to read documents that contain old data types, such as *TDataStd_Shape*;
401 * **TCLLIBPATH**, **TCL_LIBRARY**, **TK_LIBRARY** and **TIX_LIBRARY** are required to allow work with **DRAW** and **WOK**.
765b3e07 402
403@section OCCT_OVW_SECTION_7 Getting Started
404
765b3e07 405@subsection OCCT_OVW_SECTION_7_1 Draw Test Harness
406
407Draw is a command interpreter based on TCL and a graphical system used for testing and demonstrating OCCT modeling libraries.
408
409Draw can be used interactively to create, display and modify objects such as curves, surfaces and topological shapes.
410
411@image html /overview/images/overview_draw.png
412@image latex /overview/images/overview_draw.png
413
414Scripts can be written to customize Draw and perform tests.
415New types of objects and new commands can be added using C++ programming language.
416
417Draw contains:
418
419 * A command interpreter based on TCL command language.
420 * A 2D an 3D graphic viewer with support of operations such as zoom, pan, rotation and full-screen views.
421 * An optional set of geometric commands to create and modify curves and surfaces and to use OCCT geometry algorithms.
422 * A set of topological commands to create and modify BRep shapes and to use OCCT topology algorithms.
423 * A set of graphic commands for view and display operations including Mesh Visualization Service.
424 * A set of Application framework commands for handling of files and attributes.
425 * A set of Data Exchange commands for translation of files from various formats (IGES,STEP) into OCCT shapes.
426 * A set of Shape Healing commands: check of overlapping edges, approximation of a shape to BSpline, etc.
427
428You can add new custom test harness commands to Draw in order to test
429or demonstrate a new functionality, which you are developing.
430
431Currently DRAW Test Harness is a single executable called DRAWEXE.
432
433Commands grouped in toolkits can be loaded at run-time thereby implementing dynamically loaded plug-ins.
434Thus you can work only with the commands that suit your needs adding
435the commands dynamically without leaving the Test Harness session.
436
437Declaration of available plug-ins is done through special resource file(s).
438The pload command loads the plug-in in accordance with
439the specified resource file and activates the commands implemented in the plug-in.
440
dd21889e 441The whole process of using the plug-in mechanism as well as the instructions for extending Test Harness is described in the @ref user_guides__test_harness.
765b3e07 442
e5bd0d98 443Draw Test Harness provides an environment for OCCT automated testing system.
444Please, consult its @ref dev_guides__tests "Automated Testing System" for details.
765b3e07 445
446Remarks:
447
448* The DRAWEXE executable is delivered with the installation procedure on Windows platform only.
e5bd0d98 449* To start it, launch DRAWEXE executable from Open CASCADE Technology/Draw Test Harness item of the Start\\Programs menu.
765b3e07 450
451@subsection OCCT_OVW_SECTION_7_2 Experimenting with Draw Test Harness
452
453 Running Draw
454------------
455
456**On Linux:**
457
bf62b306 4581. If OCCT was built by Code::Blocks use <i>$CASROOT/draw_cbp.sh</i> file to launch *DRAWEXE* executable;
4592. If OCCT was built by Automake use <i>$CASROOT/draw_amk.sh</i> file to launch *DRAWEXE* executable;
765b3e07 460
461Draw[1]> prompt appears in the command window
462
bf62b306 463Type *pload ALL*
765b3e07 464
465**On Windows:**
466
467Launch Draw executable from Open CASCADE Technology\\Test Harness\\Draw Test Harness
bf62b306 468item of the Start\\Programs menu or Use <i>$CASROOT\\draw.bat</i> file to launch *DRAWEXE* executable.
765b3e07 469
470Draw[1]> prompt appears in the command window
471
472Type pload ALL
473
474**Creating your first geometric objects**
475
bf62b306 4761. In the command window, type *axo* to create an axonometric view
4772. 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.
4783. Type *fit* to fill the viewer with the cube
4794. 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
765b3e07 480
481**Manipulating the view**
482
bf62b306 4831. Type *clear* to erase the view
4842. Type *donly c* to display the cylinder only
4853. Type *donly b* to display the cube only
4864. Type *hlr hlr b* to display the cube in the hidden line removal mode
765b3e07 487
488**Running demonstration files**
489
bf62b306 4901. Type *cd ../..* to return to the root directory
4912. Type *cd samples/tcl* to reach the *DrawResources* directory
4923. Type *source <demo_file>* to run the demonstration file provided with Open CASCADE. The following demonstration files are available:
493 * bottle.tcl
494 * challenge.tcl
765b3e07 495 * DataExchangeDemo.tcl
496 * ModelingDemo.tcl
765b3e07 497 * VisualizationDemo.tcl
498
499**Getting Help**
500
bf62b306 5011. Type *help* to see all available commands
5022. Type *help <command_name>* to find out the arguments for a given command
765b3e07 503
504@subsection OCCT_OVW_SECTION_7_3 Programming Samples
505
506@subsubsection OCCT_OVW_SECTION_7_3_1 MFC
507
508Visual C++ programming samples containing 10 Visual C++ projects
509illustrating how to use a particular module or functionality.
510
511The list of MFC samples:
512
513 * Geometry
514 * Modeling
515 * Viewer2d
516 * Viewer3d
517 * ImportExport
518 * Ocaf
519 * Triangulation
520 * HLR
521 * Animation
522 * Convert
523
524@image html /overview/images/overview_mvc.png
525@image latex /overview/images/overview_mvc.png
526
527**Remarks:**
528
529 * MFC samples are available only on Windows platform;
530 * To start a sample use Open CASCADE Technology\\Samples\\Mfc\\ item of the Start\\Programs menu;
531 * Read carefully readme.txt to learn about launching and compilation options.
532
5c573e69 533See \subpage samples_mfc_standard "Readme" for details.
534
765b3e07 535@subsubsection OCCT_OVW_SECTION_7_3_2 Qt
536
537OCCT contains three samples based on Qt application framework
538
539 Import Export
540-------------
541
e5bd0d98 542 Import Export programming sample contains 3D Viewer and Import / Export functionality.
765b3e07 543
544@image html /overview/images/overview_qt.png
545@image latex /overview/images/overview_qt.png
546
547 Tutorial
548---------
549
550The Qt programming tutorial teaches how to use Open CASCADE Technology services to model a 3D object.
551The purpose of the tutorial is not to explain all OCCT classes but
552to help start thinking in terms of the Open CASCADE Technology.
553
554This tutorial assumes that the user has experience in using and setting up C++.
555From the viewpoint of programming, Open CASCADE Technology is designed
556to enhance user's C++ tools with high performance modeling classes, methods and functions.
557The combination of these resources allows creating substantial applications.
558
e5bd0d98 559**See also:** @ref tutorial "OCCT Tutorial"
765b3e07 560
561 Voxel
562------
563
dd21889e 564This 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).
765b3e07 565
dd21889e 566**See also:** <a href="occt_voxels_wp.html">Voxels User's guide</a>
765b3e07 567
568**Remarks:**
569
570 * Qt samples are available on all supported platforms;
571 * To start a sample on Windows use Open CASCADE Technology\\Samples\\Qt\\ item of the Start\\Programs menu.
572
573@subsubsection OCCT_OVW_SECTION_7_3_3 C#
574
dd21889e 575C# sample demonstrates integration of OCCT 3D Viewer and Import / Export functionality into .NET applications (using Windows Forms and WPF front ends).
765b3e07 576
577@image html /overview/images/overview_c__ie.png
578@image latex /overview/images/overview_c__ie.png
579
580Import:
581
582 * BRep
583 * Iges
584 * Step
585
586Export:
587
588 * Brep
589 * Iges
590 * Step
591 * Stl
592 * Vrml
5c573e69 593
594See \subpage samples_csharp "Readme" for details.
595