I think it's better not to call frame() within BeginPaint() / EndPaint() block. That's the main difference of CWnd::OnDraw(). We don't care about the invalidated region of Windows, so you can call frame() later, and do not forget to disable background erasing which also has no use in an OSG window.
2009/4/20 Jesper D. Thomsen <[email protected]> > Hi, and thank you for answering. > > I'm currently doing that by calling frame() within my OnDraw() handler, but > I'm suspecting (without any proof) that it gets called too often somehow, > and that there's some queuing within OSG that I'm not using properly. When > calling a pure OpenGL rendering pipeline from OnDraw() (the old viewport > renderer which OSG is replacing) I do not have the problem. > > > Jesper D. Thomsen > > ** > > ------------------------------ > *From:* [email protected] [ > [email protected]] On Behalf Of Can T. Oguz [ > [email protected]] > *Sent:* Monday, April 20, 2009 12:41 PM > *To:* OpenSceneGraph Users > *Subject:* Re: [osg-users] OpenScenegraph MFC application freezes in Vista > when cpu is maxed out. > > Hi, > > You may want to try posting frame requests as windows messages (via > PostMessage()). Call frame() within the handler. > > Regards, > > Can > > > 2009/4/20 Jesper D. Thomsen <[email protected]> > >> Hi all, I have a somewhat irritating error in Vista (and to a lesser >> degree Windows XP). >> >> I'm using OSG 2.6.1 to render a viewport in an MFC application (built in >> Visual Studio 2005 SP1). I'm running in single-threaded mode (although I >> have tried multithreaded also without any luck). I'm manually calling frame >> when I want the viewport to be updated rather than using run(), as I don't >> want to waste cpu/gpu on redrawing a stationary viewport. My problem is that >> when I have a somewhat complex model loaded, the cpu-load on the single core >> sometimes spikes out at maximum load when doing updates fast (such as during >> a fast drag). When this happens the machine often freezes the OSG viewport >> (and the cpu load continues at maximum for a single core). In Vista I have >> to terminate the application, but in Windows XP I can change focus to >> another application window and the viewport returns to normal (0% cpu load) >> when I switch back to my application. >> >> I'm all out of ideas as to exactly why this happens, as I don't completely >> understand if I'm allowed to call frame() rapidly or not. I'm looking for a >> function which can tell me if the previous frame() has completed, in order >> to not call a new frame() before the previous is done. I don't believe this >> should be necessary, but I have obviously done something to offend OSG :) >> Any ideas or insights will be much appreciated. >> >> regards, and thanks in advance. >> >> >> Jesper D. Thomsen >> >> ** >> >> _______________________________________________ >> 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 > >
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