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 <robert.osfi...@gmail.com> 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 <f4us...@gmail.com> 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 >> 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
