I haven't done what you're wanting to do. I only support the case where I have multiple scenes that I add before I enter the rendering loop. I then switch to whatever one I want during the rendering. Obviously this is trivial. Rendering more than one at the same time with the effect you want is more problematic. Perhaps someone else could offer some input here.
Whatever you attach before the rendering traversal will get rendered. I suppose you could load up all your osg files into nodes and then attach the nodes you want to render on the fly, per your suggestion, and see what happens. I don't know how you would fade between two scenes. Maybe use RTT with FBOs and do linear interpolation between them or employ some sort of a shader.?.? Just some rambling thoughts... -Shayne -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Bruce Wheaton Sent: Monday, February 22, 2010 6:20 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Changing scenes on the fly Thanks, I have seen Switch nodes. Some wrinkles though - I need a dynamic system, and there may be multiples active at a time, for instance in between a cross-fade. But my main question still applies - should I load the .osg file and attach the whole graph downstream of the switch on the fly? Bruce On Feb 22, 2010, at 4:02 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/ MXDEC wrote: > Bruce, > > I would recommend using the switch node "osg::Switch" to change > between > scenegraphs. You can add the scenegraphs that the switch node can > render at > any one time during setup and then select which one you want > rendered using > the method "setSingleChildOn". > > Hope this helps... > -Shayne > > -----Original Message----- > From: osg-users-boun...@lists.openscenegraph.org > [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Bruce > Wheaton > Sent: Monday, February 22, 2010 11:33 AM > To: osg-users@lists.openscenegraph.org > Subject: [osg-users] Changing scenes on the fly > > What's the recommended way to change scenes? I'll have a static setup > of multiple cameras, then need to change what scene is being viewed. > > I feel that one big issue is the scale of the scene I want to load, so > I guess I need a master PAT, which I may have to add, since I need to > keep the setup up on a few different cameras. > > Is it best to switch the whole scene, or add the scene's top node as a > child of my existing graph? I should add that I'll have multiple > scenes, if for nothing else than to cross-fade between the two scenes. > Am I answering my own question then? I need a master node, maybe a > switch, a PAT for each scene, then load the scene and place it as a > child of the PAT node? > > Let me guess - there's an example that shows this exact thing? > > Thanks, > > Bruce Wheaton > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
