Hi Scott,
does it works with osgviewer ?
something like
osgviewer --stereo QUAD_BUFFER cow.osg
should display the cow in stereo without any error...
Also I can't remember it exactly, but I think you have to re-init the
context or something like this when switching to quadbuffer stereo...
When switching in other stereo mode it is not necessary...
Maybe others can be more helpful...
Pierre.
Le lundi 28 septembre 2009 à 17:42 -0500, Scott Senften a écrit :
> HI all,
>
> I'm having two difficulties with osgviewerQtWidget on linux, and I was
> hoping someone else may have already seen this and can give me some
> insight as to my troubles.
>
> In main.cpp, I added the following lines to turn on quadbuffer stereo.
>
>
> QPointer<testMainWin> myMainWindow = new testMainWin;
>
> #if DO_OUTBOARD_WINDOW
> QPointer<testOutboardWin> mySecondaryWindow = new testOutboardWin;
> #endif
>
> /* added these 3 lines */
> osg::DisplaySettings* ds = osg::DisplaySettings::instance();
> ds->setStereo( true );
> ds->setStereoMode( osg::DisplaySettings::QUAD_BUFFER );
>
> // The .ui file uses the "Promoted" widget, CompositeViewerQOSG
> osg::ref_ptr<CompositeViewerQOSG> compositeViewer =
> myMainWindow->ui.osgGraphicsArea;
>
> osg::ref_ptr<ViewQOSG> view1 = new ViewQOSG(
> myMainWindow->ui.graphicsView1 );
> view1->setObjectName("ViewQOSG 1");
>
>
> When I do so, I get the following warning/error
>
> Warning: detected OpenGL error 'invalid operation' after RenderBin::draw(,)
>
> quadbuffer stereo is anabled on the system and I have other OGL apps
> that work as expected. It appears that the context is valid but I
> haven't been able to retrieve the visual it thinks it's using to see
> if it's picked an appropriate one.
>
> ANAGLYPHIC stereo works as expected.
>
> My other issue is trying to get a visual with alpha. Similarly...
>
> QPointer<testMainWin> myMainWindow = new testMainWin;
>
> #if DO_OUTBOARD_WINDOW
> QPointer<testOutboardWin> mySecondaryWindow = new testOutboardWin;
> #endif
>
> /* added these two lines */
> osg::DisplaySettings* ds = osg::DisplaySettings::instance();
> ds->setMinimumNumAlphaBits( 1 );
>
> // The .ui file uses the "Promoted" widget, CompositeViewerQOSG
> osg::ref_ptr<CompositeViewerQOSG> compositeViewer =
> myMainWindow->ui.osgGraphicsArea;
>
> osg::ref_ptr<ViewQOSG> view1 = new ViewQOSG(
> myMainWindow->ui.graphicsView1 );
> view1->setObjectName("ViewQOSG 1");
>
>
> This gives me
>
> X Error: BadMatch (invalid parameter attributes) 8
> Extension: 143 (Uknown extension)
> Minor opcode: 5 (Unknown request)
> Resource id: 0x6400026
> Error: In Texture::Extensions::setupGLExtensions(..) OpenGL version
> test failed, requires valid graphics context.
> Segmentation fault
>
> which I'm assuming is because the context is either invalid or not current.
>
> If anyone has seen these problems and has some insight, I'd be
> grateful for your experience.
>
> Thanks
>
> Scott
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