6 @htmlonly<center>@endhtmlonly
7 @figure{/resources/occt_logo.png}
8 @htmlonly</center>@endhtmlonly
10 @section OCCT_OVW_SECTION_1 Welcome
12 Welcome to Open CASCADE Technology (OCCT), a software development platform
13 providing services for 3D surface and solid modeling, CAD data exchange, and
14 visualization. Most of OCCT functionality is available in the form of C++
15 libraries. OCCT can be best applied in development of software dealing with 3D
16 modeling (CAD), manufacturing / measuring (CAM) or numerical simulation (CAE).
18 @section OCCT_OVW_SECTION_2 Copyrights
20 Open CASCADE Technology and all materials, including this documentation, is
21 Copyright (c) 1999-2018 by OPEN CASCADE S.A.S. All rights reserved.
23 @htmlonly<center>@endhtmlonly
24 https://www.opencascade.com
25 @figure{/resources/occ_logo.png}
26 @htmlonly</center>@endhtmlonly
31 Open CASCADE Technology is free software; you can redistribute it and / or modify it under the terms of the
32 @ref license_lgpl_21 "GNU Lesser General Public License (LGPL) version 2.1", with additional @ref occt_lgpl_exception "exception".
34 Note that LGPL imposes some obligations on the application linked with Open CASCADE Technology.
35 If you wish to use OCCT in a proprietary application, please pay a special attention to address the requirements of LGPL section 6.
36 At minimum the following should be considered:
37 1. Add the notice visible to the users of your application clearly stating that Open CASCADE Technology is used in this application, and that they have rights in this regard according to LGPL.
38 Such notice can be added in About dialog box (this is mandatory if this box contains copyright statements) or a similar place and/or in the documentation.
39 The text of LGPL license should be accessible to the user.
40 2. Make the copy of OCCT sources used by the application available to its users, and if necessary provide instructions on how to build it in a way compatible with the application.
41 3. Ensure that the user actually can exercise the right to run your application with a modified version of OCCT.
42 If the application is distributed in a form that does not allow the user to modify OCCT part (e.g. the application is linked to OCCT statically or is distributed via AppStore on iOS, GooglePlay on Android, Windows Store, etc.),
43 the application should be provided separately in a modifiable form, with all materials needed for the user to be able to run the application with a modified version of OCCT.
45 If you want to use Open CASCADE Technology without being bound by LGPL requirements,
46 please <a href="https://www.opencascade.com/contact">contact Open CASCADE company</a> for a commercial license.
48 Note that Open CASCADE Technology is provided on an "AS IS" basis, WITHOUT
49 WARRANTY OF ANY KIND. The entire risk related to any use of the OCCT code and
50 materials is on you. See the @ref occt_public_license "license" text for formal
54 ----------------------
56 You are hereby informed that all software is a property of its respective authors and is protected by
57 international and domestic laws on intellectual property and trademarks.
58 Should you need further information, directly contact the authors.
60 **CAS.CADE** and **Open CASCADE** are registered trademarks of
63 **Linux** is a registered trademark of Linus Torvalds.
65 **Windows** is a registered trademark of Microsoft Corporation in the United States and other countries.
67 **Mac** and the Mac logo are trademarks of Apple Inc., registered in the U.S. and other countries.
72 The following parties are acknowledged for producing tools which are used within
73 Open CASCADE Technology libraries or for release preparation.
75 You are hereby informed that all rights to the software listed below belong to its respective
76 authors and such software may not be freely available and/or be free of charge for any kind
77 of use or purpose. We strongly recommend that you carefully read the license of these products
78 and, in case you need any further information, directly contact their authors.
80 **Qt** is a cross-platform application framework that is widely used for developing application software
81 with graphical user interface (GUI). Qt is free and open source software distributed under
82 the terms of the GNU Lesser General Public License. In OCCT Qt is used for programming samples.
83 If you need further information on Qt, refer to Qt Homepage (https://www.qt.io/)
85 **Tcl** is a high-level programming language. Tk is a graphical user interface (GUI) toolkit,
86 with buttons, menus, listboxes, scrollbars, and so on. Taken together Tcl and Tk provide a solution
87 to develop cross-platform graphical user interfaces with a native look and feel. Tcl/Tk is under copyright by
88 Scriptics Corp., Sun Microsystems, and other companies. However, Tcl/Tk is an open source, and
89 the copyright allows you to use, modify, and redistribute Tcl/Tk for any purpose, without an
90 explicit license agreement and without paying any license fees or royalties.
91 To use Tcl/Tk, refer to the Licensing Terms (https://www.tcl.tk/software/tcltk/license.html).
93 **FreeType 2** is developed by Antoine Leca, David Turner, Werner Lemberg and others.
94 It is a software font engine that is designed to be small, efficient, highly customizable and
95 portable while capable of producing high-quality output (glyph images). This product
96 can be used in graphic libraries, display servers, font conversion tools,
97 text image generation tools, and many other products.
98 FreeType 2 is released under two open-source licenses: BSD-like FreeType License and the GPL (https://www.freetype.org/license.html).
100 **Intel(R) Threading Building Blocks (TBB)** offers a rich and complete approach to expressing parallelism in a C++ program.
101 It is a library that helps you to take advantage of multi-core processor performance without having to be a threading expert.
102 Threading Building Blocks is not just a threads-replacement library. It represents a higher-level, task-based parallelism that
103 abstracts platform details and threading mechanisms for scalability and performance.
104 TBB version 2017 is available under Apache 2.0 license, while older versions
105 until 4.4 are available under GPLv2 license with the runtime exception (https://www.threadingbuildingblocks.org).
107 **OpenGL** is an industry standard API for 3D graphics used by OCCT for
108 implementation of 3D viewer. OpenGL specification is developed by the
109 Khronos group, https://www.khronos.org/opengl/. OCCT code includes header
110 file *glext.h* obtained from Khronos web site.
112 **VTK** -- The **Visualization Toolkit (VTK)** is an open-source, freely available software system for 3D computer graphics, image processing and visualization. OCCT VIS component provides adaptation functionality for visualization of OCCT topological shapes by means of VTK library. If you need further information on VTK, refer to VTK Homepage https://www.vtk.org/.
114 **Doxygen** developed by Dimitri van Heesch is open source documentation system for
115 C++, C, Java, Objective-C, Python, IDL, PHP and C#. This product is used in Open CASCADE Technology
116 for automatic creation of Technical Documentation from C++ header files.
117 If you need further information on Doxygen, refer to https://www.stack.nl/~dimitri/doxygen/index.html.
119 **Graphviz** is open source graph visualization software developed by John Ellson, Emden Gansner, Yifan Hu and Arif Bilgin.
120 Graph visualization is representiation of structured information as diagrams of abstract graphs and networks.
121 This product is used together with Doxygen in Open CASCADE Technology for automatic creation of Technical Documentation
122 (generation of dependency graphs). Current versions of Graphviz are licensed on an open source
123 basis under The Eclipse Public License (EPL) (https://www.graphviz.org/license/).
125 **Inno Setup** is a free script-driven installation system created in CodeGear Delphi by Jordan Russell.
126 In OCCT Inno Setup is used to create Installation Wizard on Windows.
127 It is licensed under Inno Setup License (http://www.jrsoftware.org/files/is/license.txt).
129 **FreeImage** is an Open Source library supporting popular graphics image formats, such as PNG, BMP, JPEG, TIFF,
130 and others used by multimedia applications. This library is developed by Hervé Drolon and Floris van den Berg.
131 FreeImage is easy to use, fast, multithreading safe, compatible with all 32-bit or 64-bit versions of Windows,
132 and cross-platform (works both with Linux and Mac OS X). FreeImage is optionally used by OCCT to work
133 with images, on conditions of the FreeImage Public License (FIPL) (https://freeimage.sourceforge.net/freeimage-license.txt).
135 **David M. Gay's floating point routines** (dtoa.c) are used for fast reading of floating point values from text strings.
136 These routines are available under MIT-like license (see https://www.netlib.org/fp/).
138 **CMake** is an open-source, cross-platform family of tools designed to build, test and package software. CMake is used to control the software compilation process using simple platform and compiler independent configuration files, and generate native makefiles and workspaces that can be used in the compiler environment of your choice.
139 OCCT uses CMake as a build system. CMake is available under BSD 3-Clause license. See more at https://cmake.org/
141 **Cotire** (compile time reducer) is a CMake module that speeds up the build process of CMake based build systems
142 by fully automating techniques as precompiled header usage and single compilation unit builds for C and C++.
143 Cotire is included in OCCT repository and used optionally by OCCT CMake scripts to accelerate builds by use of precompiled headers.
144 Cotire is licensed under the MIT license (https://github.com/sakra/cotire/blob/master/license).
146 **FFmpeg** is an Open Source framework supporting various image, video and audio codecs.
147 FFmpeg is optionally used by OCCT for video recording, on LGPL conditions (https://www.ffmpeg.org/legal.html).
149 **MikTEX** is up-to-date implementation of TeX/LaTeX and related programs for Windows. It is used
150 for generation of User and Developer Guides in PDF format. See https://miktex.org for information
153 **RapidJSON** is an Open Source JSON parser and generator for C++.
154 RapidJSON is optionally used by OCCT for reading glTF files (https://rapidjson.org/).
156 **DejaVu** fonts are a font family based on the Vera Fonts under a permissive license (MIT-like, https://dejavu-fonts.github.io/License.html).
157 DejaVu Sans (basic Latin sub-set) is used by OCCT as fallback font when no system font is available.
159 Adobe Systems, Inc. provides **Adobe Reader**, which can be used to view files in Portable Document Format (PDF).
161 @section OCCT_OVW_SECTION_3 Documentation
163 OCCT documentation is provided in several forms:
165 - This overview provides general description of OCCT structure, functionality, modules, and features.
166 It is available in HTML format (generated by Doxygen) and includes User and Developer Guides.
167 The sources of this documentation are contained in **dox** subdirectory of OCCT sources
168 (plain text format is used, with mixed MarkDown / Doxygen syntax mark-up).
170 - User and Developer Guides describing in details OCCT modules and development tools are also available in
171 Adobe Portable Document Format (PDF). To read this format, you need Adobe Acrobat Reader,
172 which is a freeware and can be downloaded from the Adobe site.
174 - Full reference documentation covering all OCCT classes generated automatically by Doxygen
175 software is provided in HTML format.
176 Reference documentation is presented in **Modules --> Toolkits --> Packages --> Classes**
177 logic structure with cross-references to all OCCT classes and complete in-browser search by all classes.
179 See @ref occt_dev_guides__documentation "OCCT Documentation Guide" for details on OCCT documentation system.
181 **Generation of HTML documentation**
183 To generate HTML documentation from sources contained in *dox* subdirectory,
184 you need to have Tcl and Doxygen 1.8.5 (or above) installed on your system.
186 Use script **gendoc** (batch file on Windows, shell script on Linux / Mac OSX) to generate documentation.
188 To generate Overview documentation:
190 cmd> gendoc -overview
192 To generate Reference manual:
196 Run this command without arguments to get help on supported options.
198 @section OCCT_OVW_SECTION_5 Requirements
200 Open CASCADE Technology is designed to be highly portable and is known to
201 work on wide range of platforms.
202 Current version is officially certified on Windows (IA-32 and x86-64),
203 Linux (x86-64), OS X / macOS (x86-64), Android (armv7 and x86), and
204 iOS (armv7, arm64) platforms.
206 The tables below describe the recommended software configurations
207 for which OCCT is certified to work.
209 @subsection overview_req_cpp C++ Compiler / IDE
212 | --------- | ----------- |
213 | Windows | Microsoft Visual Studio: 2008 SP1, 2010 SP1, 2012 Update 4, 2013 Update 5, 2015 Update 3, 2017 <sup>1</sup>, 2019 <br>, LLVM (ClangCL), GCC 4.3+ (Mingw-w64)|
214 | Linux | GNU gcc 4.3+ <br> LLVM CLang 3.6+ |
215 | OS X / macOS | XCode 6 or newer |
216 | Android | NDK r10, GNU gcc 4.8 or newer |
217 | Web | Emscripten SDK 1.39 or newer (CLang) |
219 1) VC++ 141 64-bit is used for regular testing and for building binary package of official release of OCCT on Windows.
221 @subsection overview_req_libs Third-party libraries
223 | Component | Requirement |
224 | --------- | ----------- |
225 | Graphic library | OpenGL 3.3+, OpenGL ES 2.0+ <br> Direct3D 9 |
226 | Qt (for samples and demos) | Desktop: Qt 4.8.6+ https://www.qt.io/download/ <br> Android: Qt 5.3.2+ https://www.qt.io/download/ |
227 | TCL (for testing tools) | Tcl/Tk 8.6.3+ https://www.tcl.tk/software/tcltk/download.html <br> or ActiveTcl 8.6 https://www.activestate.com/activetcl/downloads (for Windows)|
228 | Freetype (for text rendering) | FreeType 2.4.11-2.7.1 https://sourceforge.net/projects/freetype/files/ |
229 | FreeImage (optional, for support of common 2D graphic formats) | FreeImage 3.17.0+ https://sourceforge.net/projects/freeimage/files |
230 | FFmpeg (optional, for video recording) | FFmpeg 3.1+ https://www.ffmpeg.org/download.html |
231 | RapidJSON (optional, for reading glTF) | RapidJSON 1.1+ https://rapidjson.org/ |
232 | Intel TBB (optional, for multithreaded algorithms) | TBB 4.x or 5.x https://www.threadingbuildingblocks.org/ |
233 | VTK (for VTK Integration Services | VTK 6.1+ https://www.vtk.org/download/ |
234 | Doxygen (optional for building documentation) | Doxygen 1.8.5+ https://www.stack.nl/~dimitri/doxygen/download.html |
236 @subsection overview_req_hw Hardware
238 | Component | Requirement |
239 | --------- | ----------- |
240 | Minimum memory | 512 MB, 1 GB recommended |
241 | Free disk space (complete installation) | 600 MB approx. |
243 On desktop, 3D viewer for optimal performance requires graphics processing unit (GPU) supporting OpenGL 3.3 or above.
244 Ray tracing requires OpenGL 4.0+ or OpenGL 3.3+ with *GL_ARB_texture_buffer_object_rgb32* extension.
245 Textures within ray tracing will be available only when *GL_ARB_bindless_texture extension* is provided by driver.
247 On mobile platforms, OpenGL ES 2.0+ is required for 3D viewer (OpenGL ES 3.1+ is recommended).
248 The ray tracing is not yet available on mobile platforms.
249 Some old hardware might be unable to execute complex GLSL programs (e.g. with high number of light sources, clipping planes).
251 OCCT 3D Viewer, in general, supports wide range of graphics hardware - from very old to new.
252 Therefore, if you observe some unexpected visual issues - first check for OpenGL driver update (or firmware update in case of mobile platforms);
253 but beware that driver update might also come with new bugs.
254 Don't forget to report these bugs to vendors.
256 @section OCCT_OVW_SECTION_4 Installation
258 In most cases you need to rebuild OCCT on your platform (OS, compiler) before
259 using it in your project, to ensure binary compatibility.
260 See @ref occt_dev_guides__building for instructions on
261 building OCCT from sources on supported platforms.
263 @subsection OCCT_OVW_SECTION_4_1 Using Windows installer
265 On Windows Open CASCADE Technology can be installed with binaries precompiled by
266 Visual C++ 2010 with installation procedure.
270 If you have a previous version of OCCT installed on your station,
271 and you do not plan to use it along with the new version, you might want to uninstall
272 the previous version (using Control Panel, Add/Remove Programs) before
273 the installation of this new version, to avoid possible problems
274 (conflict of system variables, paths, etc).
276 **Attention:** For full installation OCCT requires approximately 650 Mb of disk space,
277 but during the installation process you will need 1,2 Gb of free disk space.
279 OCCT installation with reference documentation requires 1,4 Gb on disk.
281 * Download the OCCT installer from OPEN CASCADE web site using the link. you have been provided
282 * Launch the installer and follow the instructions.
284 The includes and binaries of third-party libraries necessary for building and launching
285 OCCT are included into binary distribution (built with Visual C++ 2010).
286 When the installation is complete, you will find the directories for 3rd party products
287 (some might be absent in case of custom installation) and the main **OCCT** directory:
289 @figure{/overview/images/overview_3rdparty.png}
291 The contents of the OCCT-7.4.0 directory (called further "OCCT root", or $CASROOT) are as follows:
293 @figure{/overview/images/overview_installation.png, "The directory tree"}
295 * **adm** This folder contains administration files, which allow rebuilding OCCT;
296 * **adm/cmake** This folder contains files of CMake building procedure;
297 * **adm/msvc** This folder contains Visual Studio projects for Visual C++ 2010, 2012, 2013, 2015, 2017 and 2019 which allow rebuilding OCCT under Windows platform in 32 and 64-bit mode;
298 * **data** This folder contains CAD files in different formats, which can be used to test the OCCT functionality;
299 * **doc** This folder contains OCCT documentation in HTML and PDF format;
300 * **dox** This folder contains sources of OCCT documentation in plain text (MarkDown) format;
301 * **inc** This folder contains copies of all OCCT header files;
302 * **samples** This folder contains sample applications.
303 * **src** This folder contains OCCT source files. They are organized in folders, one per development unit;
304 * **tests** This folder contains scripts for OCCT testing.
305 * **tools** This folder contains sources of Inspector tool.
306 * **win64/vc10** This folder contains executable and library files built in optimize mode for Windows platform by Visual C++ 2010;
308 @section OCCT_OVW_SECTION_4_2 Environment Variables
310 To run any Open CASCADE Technology application you need to set the environment variables.
314 You can define the environment variables with env.bat script located in the
315 $CASROOT folder. This script accepts two arguments to be used:
316 the version of Visual Studio (vc10 -- vc142) and the architecture (win32 or win64).
318 The additional environment settings necessary for compiling OCCT libraries and samples
319 by Microsoft Visual Studio can be set using script custom.bat located in the same folder.
320 You might need to edit this script to correct the paths to third-party libraries
321 if they are installed on your system in a non-default location.
323 Script msvc.bat can be used with the same arguments for immediate launch of Visual Studio for (re)compiling OCCT.
328 If OCCT was built by Code::Blocks, you can define the environment variables with env_cbp.sh or custom_cbp.sh script.
330 If OCCT was built by Automake, you can define the environment variables with env_amk.sh or custom_amk.sh script.
332 The scripts are located in the OCCT root folder.
335 ### Description of system variables:
337 * **CASROOT** is used to define the root directory of Open CASCADE Technology;
338 * **PATH** is required to define the path to OCCT binaries and 3rdparty folder;
339 * **LD_LIBRARY_PATH** is required to define the path to OCCT libraries (on UNIX platforms only; **DYLD_LIBRARY_PATH** variable in case of macOS);
340 * **MMGT_OPT** (optional) if set to 1, the memory manager performs optimizations as described below; if set to 2,
341 Intel (R) TBB optimized memory manager is used; if 0 (default), every memory block is allocated
342 in C memory heap directly (via malloc() and free() functions).
343 In the latter case, all other options starting with *MMGT*, except MMGT_CLEAR, are ignored;
344 * **MMGT_CLEAR** (optional) if set to 1 (default), every allocated memory block is cleared by zeros;
345 if set to 0, memory block is returned as it is;
346 * **MMGT_CELLSIZE** (optional) defines the maximal size of blocks allocated in large pools of memory. Default is 200;
347 * **MMGT_NBPAGES** (optional) defines the size of memory chunks allocated for small blocks in pages
348 (operating-system dependent). Default is 10000;
349 * **MMGT_THRESHOLD** (optional) defines the maximal size of blocks that are recycled internally
350 instead of being returned to the heap. Default is 40000;
351 * **MMGT_MMAP** (optional) when set to 1 (default), large memory blocks are allocated using
352 memory mapping functions of the operating system; if set to 0,
353 they will be allocated in the C heap by malloc();
354 * **CSF_LANGUAGE** (optional) defines default language of messages;
355 * **CSF_DEBUG** (optional, Windows only): if defined then a diagnostic message is displayed in case of an exception;
356 * **CSF_DEBUG_BOP** (optional): if defined then it should specify directory where diagnostic data on problems occured in Boolean operations will be saved;
357 * **CSF_MDTVTexturesDirectory** defines the directory for available textures when using texture mapping;
358 * **CSF_ShadersDirectory** (optional) defines the directory for GLSL programs for Ray Tracing renderer (embedded resources are used when variable is undefined);
359 * **CSF_SHMessage** (optional) defines the path to the messages file for *ShapeHealing*;
360 * **CSF_XSMessage** (optional) defines the path to the messages file for **STEP** and **IGES** translators;
361 * **CSF_StandardDefaults**, **CSF_StandardLiteDefaults*, **CSF_XCAFDefaults**, and **CSF_PluginDefaults** define paths to directory where configuration files for OCAF persistence are located (required for open/save operations with OCAF documents);
362 * **CSF_IGESDefaults** and **CSF_STEPDefaults** (optional) define paths to directory where resource files of **IGES** and **STEP** translators are located;
363 * **CSF_XmlOcafResource** is required in order to set the path to **XSD** resources, which defines XML grammar.
364 * **CSF_MIGRATION_TYPES** is required in order to read documents that contain old data types, such as *TDataStd_Shape*;
366 @section OCCT_OVW_SECTION_7 Getting Started
368 @subsection OCCT_OVW_SECTION_7_1 Draw Test Harness
370 Draw is a command interpreter based on TCL and a graphical system used for testing and demonstrating OCCT modeling libraries.
372 Draw can be used interactively to create, display and modify objects such as curves, surfaces and topological shapes.
374 @figure{/overview/images/overview_draw.png}
376 Scripts can be written to customize Draw and perform tests.
377 New types of objects and new commands can be added using C++ programming language.
381 * A command interpreter based on TCL command language.
382 * A 2D an 3D graphic viewer with support of operations such as zoom, pan, rotation and full-screen views.
383 * An optional set of geometric commands to create and modify curves and surfaces and to use OCCT geometry algorithms.
384 * A set of topological commands to create and modify BRep shapes and to use OCCT topology algorithms.
385 * A set of graphic commands for view and display operations including Mesh Visualization Service.
386 * A set of Application framework commands for handling of files and attributes.
387 * A set of Data Exchange commands for translation of files from various formats (IGES,STEP) into OCCT shapes.
388 * A set of Shape Healing commands: check of overlapping edges, approximation of a shape to BSpline, etc.
390 You can add new custom test harness commands to Draw in order to test
391 or demonstrate a new functionality, which you are developing.
393 Currently DRAW Test Harness is a single executable called *DRAWEXE*.
395 Commands grouped in toolkits can be loaded at run-time thereby implementing dynamically loaded plug-ins.
396 Thus you can work only with the commands that suit your needs adding
397 the commands dynamically without leaving the Test Harness session.
399 Declaration of available plug-ins is done through special resource file(s).
400 The *pload* command loads the plug-in in accordance with
401 the specified resource file and activates the commands implemented in the plug-in.
403 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.
405 Draw Test Harness provides an environment for OCCT automated testing system.
406 Check its @ref occt_dev_guides__tests "Automated Testing System" for details.
410 * The DRAWEXE executable is delivered with the installation procedure on Windows platform only.
411 * To start it, launch DRAWEXE executable from Open CASCADE Technology/Draw Test Harness item of the Start\\Programs menu.
413 @subsection OCCT_OVW_SECTION_7_2 Experimenting with Draw Test Harness
420 * If OCCT was built by Code::Blocks use <i>$CASROOT/draw.sh</i> file to launch *DRAWEXE* executable.
422 Draw[1]> prompt appears in the command window
428 Launch Draw executable from Open CASCADE Technology\\Test Harness\\Draw Test Harness
429 item of the Start\\Programs menu or Use <i>$CASROOT\\draw.bat</i> file to launch *DRAWEXE* executable.
431 Draw[1]> prompt appears in the command window
435 **Creating your first geometric objects**
437 1. In the command window, type *axo* to create an axonometric view
438 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.
439 3. Type *fit* to fill the viewer with the cube
440 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
442 **Manipulating the view**
444 1. Type *clear* to erase the view
445 2. Type *donly c* to display the cylinder only
446 3. Type *donly b* to display the cube only
447 4. Type *hlr hlr b* to display the cube in the hidden line removal mode
449 **Running demonstration files**
451 1. Type *cd ../..* to return to the root directory
452 2. Type *cd samples/tcl* to reach the *DrawResources* directory
453 3. Type *source \<demo_file\>* to run the demonstration file provided with Open CASCADE. The following demonstration files are available:
454 * DataExchangeDemo.tcl: demonstrates sample sequence of operations with writing and reading IGES file
455 * ModelingDemo.tcl: demonstrates creation of simple shape and displaying it in HLR mode
456 * VisualizationDemo.tcl: demonstrates use of 3d viewer
457 * cad.tcl: creates solid shape looking like abbreviation "CAD"
458 * bottle.tcl: creates bottle as in OCCT Tutorial
459 * drill.tcl: creates twist drill bit shape
460 * cutter.tcl: creates milling cutter shape
461 * xde.tcl: demonstrates creation of simple assembly in XDE
462 * materials.tcl: demonstrates visual properties of materials supported by 3d viewer
463 * raytrace.tcl: demonstrates use of ray tracing display in 3d viewer
464 * dimensions.tcl: demonstrates use of dimensions, clipping, and capping in 3d viewer
468 1. Type *help* to see all available commands
469 2. Type *help \<command_name\>* to find out the arguments for a given command
471 @subsection OCCT_OVW_SECTION_7_3 Programming Samples
473 @subsubsection OCCT_OVW_SECTION_7_3_1 MFC
475 Visual C++ programming samples containing 10 Visual C++ projects
476 illustrating how to use a particular module or functionality.
478 The list of MFC samples:
491 @figure{/overview/images/overview_mvc.png}
495 * MFC samples are available only on Windows platform;
496 * To start a sample use Open CASCADE Technology\\Samples\\Mfc\\ item of the Start\\Programs menu;
497 * Read carefully readme.txt to learn about launching and compilation options.
499 See \subpage samples_mfc_standard "Readme" for details.
501 @subsubsection OCCT_OVW_SECTION_7_3_2 Qt
503 OCCT contains three samples based on Qt application framework
508 Import Export programming sample contains 3D Viewer and Import / Export functionality.
510 @figure{/overview/images/overview_qt.png}
515 The Qt programming tutorial teaches how to use Open CASCADE Technology services to model a 3D object.
516 The purpose of the tutorial is not to explain all OCCT classes but
517 to help start thinking in terms of the Open CASCADE Technology.
519 This tutorial assumes that the user has experience in using and setting up C++.
520 From the viewpoint of programming, Open CASCADE Technology is designed
521 to enhance user's C++ tools with high performance modeling classes, methods and functions.
522 The combination of these resources allows creating substantial applications.
524 **See also:** @ref occt__tutorial "OCCT Tutorial"
528 * Qt samples are available on all supported platforms;
529 * To start a sample on Windows use Open CASCADE Technology\\Samples\\Qt\\ item of the Start\\Programs menu.
531 @subsubsection OCCT_OVW_SECTION_7_3_3 C#
533 C# sample demonstrates integration of OCCT 3D Viewer and Import / Export functionality into .NET applications (using Windows Forms and WPF front ends).
535 @figure{/overview/images/overview_c__ie.png}
551 See \subpage samples_csharp_occt "C# sample Readme" for details.
553 There is also another C# example with the same functionality, which demonstrates the integration of Direct3D Viewer into .NET applications using WPF front end.
555 See \subpage samples_csharp_direct3d "Direct3D C# sample Readme" for details.
557 @subsubsection OCCT_OVW_SECTION_7_3_4 Android
559 There are two samples are representing usage OCCT framework on Android mobile platform. They represent an OCCT-based 3D-viewer with CAD import support in formats BREP, STEP and IGES: jniviewer (java) and AndroidQt (qt+qml)
562 @figure{/overview/images/samples_java_android_occt.jpg}
563 Java -- See \subpage samples_java_android_occt "Android Java sample Readme" for details.
566 @figure{/overview/images/samples_qml_android_occt.jpg}
567 Qt -- See \subpage samples_qml_android_occt "Android Qt sample Readme" for details.
569 @subsubsection OCCT_OVW_SECTION_7_3_5 iOS
571 There is a sample demonstrating usage of OCCT on iOS with Apple UIKit framework.
573 @figure{/overview/images/sample_ios_uikit.png}
575 See \subpage occt_samples_ios_uikit "iOS sample Readme" for details.
577 @subsubsection OCCT_OVW_SECTION_7_3_6 Web
579 WebGL Viewer sample demonstrating usage of OCCT 3D Viewer in Web browser with Emscripten SDK can be found in `samples/webgl`.
581 @figure{/overview/images/sample_webgl.png}
583 See \subpage occt_samples_webgl "WebGL sample Readme" for details.