Hello again,
A couple more details on this: · We're using OSG 2.8.2. · We get similar behaviour on Win XP and Win Vista. · We tried multiple file types for textures: PNG and JPEG. · In RARE cases it works with some slave cameras. That would suggest a threading issue... Thanks again, Frédéric Drolet From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Drolet, Frederic Sent: October-08-09 3:21 PM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Texture missing when adding slaves dynamically toosgViewer Hello, I'm having trouble with textures on slave cameras added to an osgViewer. Textures won't appear if I add the slaves after a first call to osgViewer::frame(). My application is composed of a rendering thread calling osgViewer::frame() every 15 ms (for a 60 Hz framerate) and a main thread handling windows and menus interactions (using MFC on Windows). One of those interactions is to add and remove camera slaves on the go (adding a projection and camera offset for multiple points of view). Here's the steps I follow to add a slave camera: · Pause my rendering thread calling osgViewer::frame() and wait for it to be idle; · Call osgViewer::stopThreading() to make sure the last frame is done drawing; · Create a child window with its own graphics context; · Add a slave to osgViewer using the newly created window handle (each slave camera uses its own osg::GraphicsContext object); · Call osgViewer::realize() to reinitialize the viewer and start threading again; · Unpause my rendring thread which starts calling osgViewer::frame() again. I use a similar approach to destroy slaves. Everything works fine except for the textures which are not displayed on the slave windows (but I can see the primitives). Note that if I add slaves before the first call to osgViewer::frame(), textures are ok. But removing and adding them again makes the textures disappear. I tried all the threading models in osgViewer, I also tried to share the "master" context in the osg::GraphicsContext::Traits object of every slave. None of those solutions is working. My comprehension of OpenGL state sets is limited so I'm probably missing something here. What am I doing wrong? Is adding slaves dynamically to an osgViewer even possible? Thanks for your help! Frederic Drolet, M. Sc. Computing Solutions and Experimentations | Solutions informatiques et expérimentations Systems of Systems | Systèmes de systèmes DRDC Valcartier | RDDC Valcartier 2459, boul. Pie-XI North Quebec, Quebec G3J 1X5 CANADA Phone | Téléphone: (418) 844-4000 ext : 4820 Fax | Télécopieur: (418) 844-4538 E-mail | Courriel: frederic.dro...@drdc-rddc.gc.ca Web : www.valcartier.drdc-rddc.gc.ca <http://www.valcartier.drdc-rddc.gc.ca>
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