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IDProjectCategoryView StatusLast Update
0020841Open CASCADEOCCT:Visualizationpublic2011-02-10 15:06
ReportersanAssigned Topsn 
PrioritynormalSeveritytrivial 
Status closedResolutionunable to reproduce 
OSWindows NT 
Summary0020841: V3d_ZBUFFER'ed trihedron breaks text output in overlayer
DescriptionReported by R.Lygin on 20.01.2009

After a z-buffered trihedron has been displayed using V3d_View::TriedronDisplay
(..., aMode = V3d_ZBUFFER) in a 3D scene that has the overlayer containing some
text (drawn using Visual3d_Layer::DrawText() method), then the text disappears,
and an error message is printed in a console:

OpenGL interface: wglUseFontBitmaps failed. Error code 0

Apart from correcting this problem, it is necessary to create a test DRAW
command that tests basic Visual3d_Layer drawing capabilities.
I suppose a command that wraps V3d_View::ColorScaleDisplay() method is a good
choice. Having such a command + the exisitng one for z-buffered trihedron it
will be easy to create a non-regression test case for this problem.

P.S. Similar problem (with a failed wglUseFontBitmaps() call) seems to be
reporduced also in Win32 version of SALOME 5.x in OCC viewer, even if no
overlayer is used there.
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Issue History

Date Modified Username Field Change
2010-09-30 14:42 san CC =>
2010-09-30 17:16 bugmaster Assigned To bugmaster => psn
2010-09-30 17:16 bugmaster Status new => assigned
2010-10-05 19:48 psn Status assigned => resolved
2011-02-10 15:06 bugmaster Status resolved => closed
2011-02-10 15:06 bugmaster Resolution @0@ => unable to reproduce
2011-08-02 11:24 bugmaster Category OCCT:VIZ => OCCT:Visualization