It's bad if you add/remove objects in an upper part of you graph (like a child removing from the graph its parent). But there is no problem for a parent to remove their children if needed.
2009/5/5 Björn Blissing <[email protected]> > No.. When I searched the mail archive I found the previously linked > message. It stated: > "It's a bad thing to add/remove items to the scene graph inside an update > callback. Apparently, it invalidates the iterators." > > It was that message that prompted my initial question. > > /Björn > > ------------------------------ > *Från:* [email protected] [mailto: > [email protected]] *För *Serge Lages > *Skickat:* den 5 maj 2009 13:49 > > *Till:* OpenSceneGraph Users > *Ämne:* Re: [osg-users] Adding and removing objects > toscenegraphduringruntime? > > Hi, > > Did you try to just add an UpdateCallback to your root node for example who > makes the job to add or remove nodes ? > > 2009/5/5 Björn Blissing <[email protected]> > >> Well that will of course be diffrent depending on if I use Viewer or >> CompositeViewer. >> >> Never the less, I still think it is strange that I would be forced to >> tear down the Viewer.run() functionallity into pieces just to add and remove >> objects to the scenegraph during runtime. Which (at least to me) would be a >> pretty trivial feature. But apparently not? >> >> /Björn >> >> ------------------------------ >> *Från:* [email protected] [mailto: >> [email protected]] *För *Vincent Bourdier >> *Skickat:* den 5 maj 2009 13:25 >> >> *Till:* OpenSceneGraph Users >> *Ämne:* Re: [osg-users] Adding and removing objects to >> scenegraphduringruntime? >> >> You can just call frame() in the while loop (if I'm right). >> See what the viewer.run() do, you'll have a good overview of what to use >> or not. >> >> Vincent. >> >> 2009/5/5 Björn Blissing <[email protected]> >> >>> The viewer.sync() and viewer.update() seems to be deprecated. And it >>> seems a bit odd (at least for me) to just throw away the functionallity >>> contained in viewer.run(). >>> >>> I have searched the mail archive but I still can't find any information >>> how to properly add and remove content to the scenegraph during runtime, >>> whilst still using the viewer.run() method. >>> >>> /Björn >>> >>> ------------------------------ >>> *Från:* [email protected] [mailto: >>> [email protected]] *För *Vincent Bourdier >>> *Skickat:* den 5 maj 2009 11:32 >>> *Till:* OpenSceneGraph Users >>> *Ämne:* Re: [osg-users] Adding and removing objects to scenegraph >>> duringruntime? >>> >>> Hi, >>> >>> I think the most secured way is to do it like that : >>> >>> while( !viewer.done() ) >>>> >>>> { >>>> viewer.sync(); >>>> viewer.update(); >>>> >>>> modify_scene_graph(); >>>> >>>> viewer.frame(); >>>> } >>>> >>>> >>> If I'm good, the callback allow safe graph modifications, but only on >>> node children... so depending on what you need, that can be a solution too. >>> The subject have been discussed lots of time on the mailing list, so >>> check the archive and you will find some good informations. >>> >>> Regards, >>> Vincent. >>> >>> 2009/5/5 Björn Blissing <[email protected]> >>> >>>> Hi! >>>> I have my GameObject class that contains the position of each dynamic >>>> game object in world coordinates. I also have my GameObjectManager class >>>> that contains a vector of all game objects. This vector is empty when the >>>> program starts, but populates with objects during runtime (some objects is >>>> also removed during runtime). >>>> >>>> I've searched the mail achieve but I can't find any good example how to >>>> add or remove objects to the scenegraph during runtime. I guess it has to >>>> be >>>> done in some form of callback. But which one? According to >>>> http://www.mail-archive.com/[email protected]/msg00725.htmlit >>>> is a bad idea to do it in a updateCallback. >>>> >>>> Hopefully someone could give me an example or at least point me at the >>>> right direction. Maybe there is an osg example I should study in depth? >>>> >>>> /Björn Blissing >>>> >>>> _______________________________________________ >>>> 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 >>> >>> >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > > -- > Serge Lages > http://www.tharsis-software.com > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- Serge Lages http://www.tharsis-software.com
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