Yes, my main concern is that inside the ViewerBase::renderingTraversals() function there are lots of other activities after the loop of swapbuffers calls. If I separate swapbuffers out into a separate function, and call it later (after all those activities in renderingTraversals()), I'm not sure if it will still work out without breaking something. I guess I'll do some testing.
Yefei -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of J.P. Delport Sent: Wednesday, January 20, 2010 1:01 AM To: OpenSceneGraph Users Subject: Re: [osg-users] Separating draw and swapbuffers Hi, He, Yefei wrote: > Hello, Robert, > > I noticed that when using the osgviewer, the draw and swapbuffers > operations take place within the same function call, > ViewerBase::renderingTraversals(). Before, with Producer, I can call > Producer::Camera::frame(false) to perform draw operation without > swapping the buffers, and do swapbuffers later explicitly. This way > I can insert my own vertical sync code or some other process between > draw and swapbuffers. Is there already something similar provided for > doing this with osgviewer? The only sample code that calls swapbuffers > explicitly is osgSlice but that program doesn't use osgviewer, rather > it creates sceneView and graphicsContext directly. I'm hesitant to > break up ViewerBase::renderingTraversals() on my own since there are > thread sync related code around the loop that calls > GraphicsContext::runOperations() and the loop that calls > GraphicsContext::swapBuffers(), and I'm worried about any implications > of interrupting it. I'm not sure, but doesn't swapBuffers just call some other windowing implementation swapbuffersimplementation function? Maybe you can override that? jp > > Thanks, > > Yefei > > _______________________________________________ > 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
