Hi JP, > Does createGeom reuse any old osg data (arrays)?
No. > where in your frame loop do you do this? Well, now that you tell me, I think the problem is here. I have no loop. I thought that the rendering refresh was done automatically when a node in the scene was modified. Sorry for my ignorance, this might seem stupid, but since I have very few dynamic modifications in my scene, how can I simply refresh the viewer frame without being obliged to have a loop. I've tried to call viewer->frame() when I know that the scene has been modified, but nothing appears now in the viewer. Cheers. Fausto On Fri, Jan 22, 2010 at 9:44 AM, J.P. Delport <[email protected]> wrote: > Hi, > > > fausto wrote: > >> Hi JP, >> it's impossible to show exactly my code, but what I basically do with the >> geode is: >> >> 1. Remove all drawables: >> geode->removeDrawables((unsigned int)0, geode->getNumDrawables()); >> >> 2. Create new ones: >> osg::ref_ptr< osg::Geometry > geom; >> geom = createGeom(parameters); >> .. >> >> 3. Add them to the geode: >> if( geom.valid() ) geode->addDrawable( geom.get() ); >> > > I don't see anything strange. Does createGeom reuse any old osg data > (arrays)? where in your frame loop do you do this? In between rendering > calls (frame)? What happens if you just delete the geode and add a new one? > > jp > > >> I'm not sure the problem is there, because as I mentioned the new scene is >> properly shown if I load it with osgViewer.exe. >> >> I think the problem is more with some missing settings, either to the >> drawables/nodes, or to the viewer (the original one, which doesn't get >> updated). I tried to set the drawables data variance to DYNAMIC, and other >> things but nothing worked. However, as Robert said, it seems this should >> work without any additional action. >> >> The strange thing is, why the old drawables are properly deleted from the >> original viewer, but the new ones are not added? >> I would have preferred that the viewer didn't do anything, than just 1 >> part of the job. >> >> Thank you all for your prompt replies, I really appreciate it. >> Fausto >> >> >> On Fri, Jan 22, 2010 at 7:55 AM, J.P. Delport <[email protected]<mailto: >> [email protected]>> wrote: >> >> Hi, >> >> can you give more detail on what you are adding/removing? Do you use >> the same vertex lists, but with new drawables. Do you change >> vertices, but keep the drawables? To get more help you'd probably >> need to make a very small example that shows the problem... >> >> jp >> >> fausto wrote: >> >> Thank you both for your inputs. >> >> To Robert: >> >> Try writing the subgraph they are in out to a file then load >> this file >> into osgviewer to see if can view them. >> >> Yes, as I mentioned the new scene data is OK, I can see it while >> debugging and after saving->loading it with osgViewer.exe all >> new drawables appear in the scene, and previous ones are >> removed. So, the scene is OK, the problem is really with the >> original viewer. It renders OK, but doesn't update properly when >> drawables are added. >> >> I'm rendering in Qt widgets, could that be the problem? >> >> To D.J. >> >> I might recommend refactoring the code to >> add/remove nodes instead of drawables. >> >> Unfortunately, I need nodes to be the same. >> >> I keep searching and testing. Thanks again for your help. >> Cheers. >> Fausto >> >> >> On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell >> <[email protected] <mailto:[email protected]> >> <mailto:[email protected] <mailto:[email protected]>>> >> >> wrote: >> >> Hi Fausto and Robert, >> >> If the simple modification is due to some specific user event >> (button >> press, file dialog, etc.), I might recommend refactoring the >> code to >> add/remove nodes instead of drawables. It sounds like you >> have no >> trouble initially getting the geometry into the scene; it is the >> simple modification that is the problem. >> >> What I am suggesting here is a work-around, and not a fix (on my >> system, it appears that there is no "bug" to fix). Other >> than this, I >> believe the issue may be familiarity with the available >> patterns; that >> is, using the right tool for the right job. No insult >> intended, but >> the only fix for that is research, time, and patience. >> >> The project I am part of uses visitors and/or swapping out >> vertices >> for time based changes, and adding/removing nodes for user based >> inputs. >> >> Fausto, as Robert said, you are the only one who can know what >> is >> appropriate for your project. >> >> Just some things to consider; I hope this helps... >> >> D.J. >> >> On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield >> <[email protected] <mailto:[email protected]> >> <mailto:[email protected] >> <mailto:[email protected]>>> wrote: >> > Hi Fausto, >> > >> > Dynamically modifying the scene graph shouldn't be that hard. >> > Removing drawables and adding news ones should perfect >> safe and >> > shouldn't require and extra steps from you, no need to >> dirty bounding >> > volumes or display lists, it should all just work. >> > >> > As to why your new drawables aren't appearing I can't say. >> Try >> > writing the subgraph they are in out to a file then load >> this file >> > into osgviewer to see if can view them. It could be >> simply that >> there >> > is something wrong with the geometry data you've set up. >> Only >> you has >> > your app and your data so you're the only one that can >> investigate. >> > >> > Robert. >> > >> > On Thu, Jan 21, 2010 at 4:41 PM, fausto <[email protected] >> <mailto:[email protected]> >> <mailto:[email protected] <mailto:[email protected]>>> wrote: >> >> Hi All, >> >> I'm struggling to have a simple modification of an osg scene >> working. >> >> I simply need to remove all drawables from a geode and >> add new >> drawables to >> >> the same geode. >> >> >> >> In the viewer, the geode just disappears after removing the >> drawables, but I >> >> can see that the scene contains the geode with the new >> drawables. So, it >> >> seems a rendering problem. >> >> >> >> I see that many people have similar problems with dynamic >> modifications. >> >> I've read plenty of posts about setting display list to >> false, using >> >> callbacks, dirtyBound(), etc.... >> >> >> >> But I hope there is a clearer and easier way to achieve >> this. >> >> >> >> Please let me know. >> >> >> >> Thanks for any help. >> >> Fausto >> >> >> >> _______________________________________________ >> >> osg-users mailing list >> >> [email protected] >> <mailto:[email protected]> >> <mailto:[email protected] >> <mailto:[email protected]>> >> >> >> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> >> >> > _______________________________________________ >> > osg-users mailing list >> > [email protected] >> <mailto:[email protected]> >> <mailto:[email protected] >> <mailto:[email protected]>> >> >> > >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > >> _______________________________________________ >> osg-users mailing list >> [email protected] >> <mailto:[email protected]> >> <mailto:[email protected] >> <mailto:[email protected]>> >> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> <mailto:[email protected]> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> -- This message is subject to the CSIR's copyright terms and >> conditions, e-mail legal notice, and implemented Open Document >> Format (ODF) standard. 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