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Add new C# sample which allow to render the OCCT scene to a Direct3D context in a WPF application. DirectX SDK is required in order to build this sample.
55 lines
2.7 KiB
Markdown
55 lines
2.7 KiB
Markdown
OCCT CSharp sample {#samples_csharp_occt}
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==================
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This sample demonstrates simple way of using OCCT libraries in .Net application
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whitten using CSharp and Windows Forms or Windows Presentation Foundation (WPF).
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The connection between .Net and OCCT (C++) level is provided by proxy library,
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OCCProxy, written in C++/CLI. The proxy library contains single ref class
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encapsulating OCCT viewer and providing functionality to manipulate this viewer
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and to import / export OCCT shapes from / to several supported formats of CAD
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files (IGES, STEP, BREP).
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The sample implements two approaches for organizing user interface with C#.
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Both applications provide the same functionality as the standard OCCT
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Import/Export sample.
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First project is called "IE_WinForms" and uses Windows Forms for GUI.
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Second application is called "IE_WPF_WinForms" and uses Windows Presentation Foundation.
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Note a few important details:
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- to encapsulate C++ class into a field of ref class, template class
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NCollection_Haft provided by OCCT is used
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- in order to work consistently on 64-bit systems with OCCT libraries built in
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32-bit mode, C# assemblies need to have platform target explicitly set to "x86"
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(in project Properties / Build)
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- this sample demonstrates indirect method of wrapping C++ to C# using manually
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created proxy library. Alternative method is available, wrapping individual
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OCCT classes to C# equivalents so that their full API is available to C# user
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and the code can be programmed on C# level similarly to C++ one. See desciption
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of OCCT C# Wrapper in Advanced Samples and Tools on OCCT web site at
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http://www.opencascade.org/support/products/advsamples
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- in WPF sample, WinForms control is used to encapsulate OCC viewer since WPF
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does not provide necessary interface to embed OpenGl view. Other possible
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solution could be to render OpenGl scene in off-screen buffer and map it
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to WPF control as image. That approach would allow using all WPF features in
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control embedding OCCT viewer.
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Run msvc.bat to start MS Visual Studio for building the sample.
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Note that project files are provided only for VS 2010, you can open them in
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newer versions of Visual Studio using automatic converter.
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After conversion check option "Target framework" in properties of C# projects
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(tab "Application") to ensure that it corresponds to the version set in
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the properties of the C++ projects (e.g. ".Net Framework 4.0" for VS 2010).
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Run run_winforms.bat or run_wpf.bat to launch the corresponding sample.
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Note that all batch scripts use configuration defined in OCCT custom.bat file
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as default; you can provide arguments specifying VS version, bitness, and mode
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to override these settings, e.g.:
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> msvc.bat vc10 win64 Debug
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