Re: [osg-users] Crash in Camera::setRenderer()
Hi Nicolas, On 9 June 2015 at 14:04, Nicolas Baillard wrote: > I keep my cameras and views using ref_prt<>. They are all created when the > application starts and never deleted. That probably rules out dangling pointers then. Which leaves me with no particular idea what might be wrong. As a long shot you could look at the OSG version you are using. I don't know what version you are using by OSG svn/trunk and OSG-3.3.x dev series have a range of fixes that might address problems. > I'm working on a minimal piece of code to reproduce the crash. Thanks, Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Crash in Camera::setRenderer()
Thank you Robert. I keep my cameras and views using ref_prt<>. They are all created when the application starts and never deleted. I'm working on a minimal piece of code to reproduce the crash. Nicolas -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=64008#64008 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Crash in Camera::setRenderer()
Hi Nicolas, Are you using C pointers or ref_ptr<> when keeping reference around the to the slave Camera? If you use a C* pointer then there is good chance that the reference count on the Camera is going to zero when it's removed from the View and getting deleted, then you add that dangling pointer back to the View and bang your get a crash there after. That's my best guess given I don't have any code in front of me. Robert. On 9 June 2015 at 13:00, Nicolas Baillard wrote: > Hello everyone. > > In my application I create several views and several cameras. Upon user > interaction each camera can be added or removed from a view using > View::addSlave() and View::removeSlave(). > My code ensures that each camera is only assigned to only one view at a time. > A camera can't be assigned to another view before being removed from the view > it currently is. > When I do that I often get a crash in the Camera::setRenderer() method that > is called by addSlave(). > > The crash happen into GraphicsOperation destructor. When a camera is added to > a view with addSlave() a new renderer is created for it. If the camera > already has a renderer that renderer is automatically deleted by the > reference counting pointer. That's when the crash happen. It looks like the > renderer (or maybe one of its members) is deleted twice. > > I'm not using multithreading. I don't change camera assignation during > rendering with callbacks. Camera assignation is all done outside of the > CompositeViewer::frame() method. > > Do you have any idea what might be causing this crash ? > > Regards, > Nicolas > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=64003#64003 > > > > > > ___ > 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] Crash in Camera::setRenderer()
Hello everyone. In my application I create several views and several cameras. Upon user interaction each camera can be added or removed from a view using View::addSlave() and View::removeSlave(). My code ensures that each camera is only assigned to only one view at a time. A camera can't be assigned to another view before being removed from the view it currently is. When I do that I often get a crash in the Camera::setRenderer() method that is called by addSlave(). The crash happen into GraphicsOperation destructor. When a camera is added to a view with addSlave() a new renderer is created for it. If the camera already has a renderer that renderer is automatically deleted by the reference counting pointer. That's when the crash happen. It looks like the renderer (or maybe one of its members) is deleted twice. I'm not using multithreading. I don't change camera assignation during rendering with callbacks. Camera assignation is all done outside of the CompositeViewer::frame() method. Do you have any idea what might be causing this crash ? Regards, Nicolas -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=64003#64003 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
