Hi Tom, There isn't an build option to enable multi-threading of the viewer, the OSG will always build with OpenThreads and have a multi-thread capable viewer, the only limitation is on how the graphics contexts are created - you have to use the OSG's native creation of graphics contexts to do multi-threading, and can't use the GraphicsWindowEmbedded functionality for grafting the OSG into existing apps, as this doesn't enable all context mechanisms required to multi-threaded, multi-context GL.
I would suggest trying out different threading models with OSG examples like osgviewer to see if they all work fine, this would at least show whether there is build issue. Then once you are confident that there isn't a build issue then move on to testing your own app. Robert. On Tue, Apr 26, 2011 at 2:13 AM, Tom Appollo <[email protected]> wrote: > Hi All, > > I had been running my app based on OSG 2.8.3 on a VS2003 build (XP machine) > for a while. However, I'm now moving the app to VS2008 so, I got a clean > 2.8.3 source, pulled the latest 3rd party VS2008 binaries and configured > CMake to build it. No problems with the build. > (NOTE: Not ready to move on past 2.8.3 yet) > > When my code is ported over and the OSG libraries are added in, when app > starts up, if my derived CompositeViewer exectues the line: > > setThreadingModel(ViewerBase::CullDrawThreadPerContext); > > (which was in the original VS2003 2.8.3 build and it ran fine) with VS2008, > it immediate crashes at the start of the frame being displayed. > > If however I replace it with > > setThreadingModel(ViewerBase::SingleThreaded); > > the app will run but as a single thread which isn't all that desirable as all > work stops if I pop up something (e.g. user dialog). > > Is there something I forgot, I didn't see anything specific in the CMake > listing regarding enabling threading (the one reference to OpenThread is set > for dynamic). > > Thank you for any insight you may be able to offer! > > Cheers, > Tom > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=38769#38769 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
