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Visual3D_Layer DrawText problem

Visual3D_Layer DrawText problem
Marco Balen 2013/05/09 15:20
I am converting an app from OCC6.3 to OCC6.6.
I have recompiled all the OCC sources and my app with VS2010 using the msvc.bat file provided.
I have a compilation problem using the DrawText method of the Visual3D_Layer class.
When I try to use the original code
myLayer->DrawText("any text",anyX,anyY,anyH);
I get a compiler error the tell me that there is no method "DrawText" for that class.

In the methods list I can see an "DrawTextA" method; Using this method I can compile the source code but I get a linker error that reports that there is no DrawtextA method fro the class Visual3D_Layer.

Introducing a remark to this line the app can be linked and seem works correctly. (without the text)

I am compiling my code with MultiByte option.

Have anyone a suggestion ?

François Lauzon 2013/05/09 15:26
Hello Marco,
for me the method DrawText has always work, no compiler error, I currently use OCC Release 6.5.4.

Marco Balen 2013/05/09 15:33
Also for me it works in OCC6.3.0 and VC2010.
I think I have a problem when building the OCC library.
It seem that the method exported in the tkv3d.lib uses a wrong type of character code (unicode,multibyte, undefined ?).
I am building my app with MFC,without ATL,in multibyte, and you ?
François Lauzon 2013/05/09 15:36
We are using the supplied vcproj file without any modification and have been compiling on VC2005 and VC2008, in 32 and 64 bits, on Windows XP and 7.
Marco Balen 2013/05/09 17:17
Have anyone used the OCC6.6.0 with VS2010 ?     
Thorsten 2013/11/22 17:38

I am getting the same linker error using DrawTextW. I managed it by using the graphic drivers "Text" Method.

Somewhere you created your V3D_Viewer like this:
Handle(Graphic3d_GraphicDriver) aGraphicDriver = new OpenGl_GraphicDriver ("TKOpenGl");
aGraphicDriver->Begin (new Aspect_DisplayConnection());
TCollection_ExtendedString aNameOfViewer ("Visu3D");
Handle(V3d_Viewer) aViewer = new V3d_Viewer(
aGraphicDriver, aName, aDomain, ViewSize, ViewProj,
ComputedMode, aDefaultComputedMode, V3d_TEX_NONE);

Now you can call the graphic drivers Text Method directly:
aViewer->Driver()->Text("Hello World!", 100, 100, 20);
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