Here's a link with a decent intro to osg reference pointers: http://andesengineering.com/OSG_ProducerArticles/RefPointers/RefPointers.html
On Dec 28, 2007 10:40 AM, Gordon Tomlinson <[EMAIL PROTECTED]> wrote: > > Assuming your not already using reference pointers > > OSG uses reference counting to aid in memory clean up and all OSG nodes are > derived from reference counted objects > > When you add a node to a parent or the scene its reference count increments > when it is removed it is decremented, in your case its reference count hits > zero so the node and its attached state and children will all be delete ( > assuming your not using ref_ptr's ) see the OSG web site or my FAQ's at > vis-sim.com for more info > > So basically you need to use reference pointer objects and not raw pointers > to you OSG nodes e.g > > ref_ptr<osg::Group> m_root1 = new osgGroup; > > ref_ptr<osg::Group> m_root2 = new osgGroup; > > m_viewer.setSceneData( m_root1.get() ); > > > > > > __________________________________________________________ > Gordon Tomlinson > > Email : [EMAIL PROTECTED] > Website : www.vis-sim.com www.gordontomlinson.com > > __________________________________________________________ > > "Self defence is not a function of learning tricks > but is a function of how quickly and intensely one > can arouse one's instinct for survival" > -Master Tambo Tetsura > > > ________________________________ > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of maruti > borker > Sent: 28 December 2007 13:51 > To: OpenSceneGraph Users > Subject: [osg-users] Changing SceneData > > > > > I have a single viewer , and two different root nodes ... When the program > loads i initialize the viewer with the first root . Then on a keypress i > change my viewer scene data to second root . And i also have a kepress by > which the viewer should go back to earlier root ( i,e first root ) . The > first keypress is working .. but the second key press is giving a > segmentation fault ...On debuggin i found that the > viewer.setSceneData(root1) is giving a seg fault. > > Any idea why this is happening ?? > Cant we change hte sceneData in between ? > -- > ---------------------------------------------- > Maruti Borker > IIIT Hyderabad > Website:- http://students.iiit.ac.in/~maruti > Blog:- http://marutiborker.wordpress.com > _______________________________________________ > 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
