robertosfield wrote: > Hi Peinman, > > Looking at your code the performance problems have little to do with > OpenGL and the OSG and everything to with creating a new callback on > every frame and writing to disk from the main thread, File IO is very > expensive so absolutely not something you want to do in main rendering > thread. The start/stop of threading and releaseContext() is rather > odd too, I can't think what you are trying to achieve here. > > What you should do is create a single callback that you can toggle > on/off when needed and have it generate an image write operation that > it dispatches to a back ground thread that does the writing to disk. > Ideally you'd recycle the images once you've finished. > > If this all sounds a bit involved, well what you are trying to do is > reasonable advanced stuff, you are rather diving into the deep end > without armbands having not learnt to swim yet... > > Robert. > > >
hi Robert thx for replying 1.without any writing to disk, frame rate is still down.my WindowCaptureCallback write nothing into disk. 2.The start/stop of threading and releaseContext() is necessary for multi threading model because of off-screen rendering on topview. 3.please more explain about that single callback and the way on/off it. cheers peiman ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=66169#66169 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
