On 9/19/07, David Callu <[EMAIL PROTECTED]> wrote: > I can't reproduce your problem. I have 4 osg window in the mainWindow and > all have the same frame rate. > Can you describe you plateform driver vertion OSG, Qt > OSG_OPTIMIZE and OSG_CAMERA_THREAD env var > ...
Thanks for looking in to this. > another think is thit is preferable to use osgViewer::CompositeViewer and > osgViewer::View > instead of osgViewer::Viewer when you have many scene and so many view. > With this, all update/cull/draw/ operations are done with the Thread Model > choose in the osgViewer::CompositeViewer, and so do the best management of > all > update/cull/draw/ operation of each View. This include to swapping OpenGL > buffer all together. > I never could notice this but a thread on the ML talk about this. according > to this thread, > swapping all OpenGL buffer together give best performance. For apps that have multiple windows and mulitple views on to one or more scenes that CompositeViewer is the most apporpriate tool. There is but though, running with multiple graphics context is not possible when one use GraphicsWindowEmbedded - only single threaded, single context per Viewer/CompositeViewer is possible. If you have multiple Windows then you need a separate Viewer/CompositeViewer for each one. The ideal is not to have to use GraphicsWindowEmbedded and provide a full GraphicsWindow implementation for the specific windowing system - for instance a GraphicsWindowQt would be appropriate. I did originally have a bash at writing a GraphicsWindowQt but Qt didn't provide all the required hooks for controlling the OpenGL context in a way that a complete GraphcsWindowQt could be achieved - bascially Qt's OpenGL & threading support isn't quite a capable/flexible as it should be. There other approach would be to inherit the native windowing into a GraphicsWindowWin32/Carbon/X11 in a way that adapts a Qt window via its native windowing implementation. There is a but in this... GraphicsWindowX11 does yet support windowing inheritance - but GraphicsWindowWin32 and Carbon do, so its all typically possible just lack of time at my end has hindered this. Others are welcome to chip in and implement window inheritance in GraphicsWindowX11 :-) Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
