Hello Robert ! I followed this thread as I'm facing the same issue Justin discovered:
- I'm on Windows (XP & Vista) - using OSG 2.8.2 - using wxWidgets 2.8 And I built a multiple view application. Thoses views are currently built around multiple osgViewer::Viewer objects. Some of those views may be hidden by the user (they are inside advanced notebook controls). I'm currently not using CompositeViewer for two reasons: 1. [the most important] compositeviewer would expect to render all the views, and if some are hidden this would lead to an issue due to wxWidgets wxGLCanvas makeCurrent() implementation. 2. My scene must be updated specifically by each viewer, and the each _updateVisitor has a user data pointer to the viewer itself, whereas the compositeviewer only as a single _updateVisitor and update the scenes only once per cycle. Now I'm also using a PagedLOD in my scene, and when I have 2 different camera positions, the database pagers seem to get confused. (I tried multiple db pagers or one shared DB pager, the result is the same). Why I really wan to know is: where should I look for explanations on the (supposed?) proper behavior of the CompositeViewer in that case in the sources ? As it may be easier for my to implement this part in the existing system rather than switching to CompositeViewer usage. Otherwise, if I have to switch: - Concerning my point 1) I supposed I could force the OpenGL context SetCurrent() call, but then to save ressources, I supposed I can use a nodemask of 0x0 for the hidden view master cameras, am I wrong ? - Concerning my point 2) what would be the best (and is there a way in fact ?!) to force a compositeviewer to update each scene just before rendering it (as some update callbacks will modify the scene depending on the window & view where it will be rendered ? According to my understanding of compositeviewer, this would just break everything (the updateTraversal() function then rendering for all views concept would not hold anymore!) Cheers! Manu. 2008/9/28 Robert Osfield <robert.osfi...@gmail.com> > Hi Justin, > > Could you please switch to using a CompositeViewer with multiple > Views, rather than multiple Viewers, as you usage model is intended to > be supported by CompositeViewer, you are much more likely to find > success/stability when using the OSG in the way it's intended. > > Also try moving up to OSG 2.6, 2.7.x or SVN/trunk as there are plenty > of improvements across the board, including to paging and multiple > window work, I can't say for certain this will fix you problem, but > there it's definitely worth a try. > > Robert. > > On Sat, Sep 27, 2008 at 1:58 AM, KSpam <keesling_s...@cox.net> wrote: > > My application utilizes a osg::PagedLOD node for terrain that is shared > across > > multiple osgViewer::Viewer instances. The terrain paging works > beautifully > > when I only have a single window open; however, there are issues whenever > I > > open a second window. > > > > Some of the issues I see are: > > 1) Window 1 appears to revert to the lowest LOD > > 2) Window 1 and 2 seem to "flicker" as if fighting over which texture or > tile > > should be visible > > 3) Sometimes window 2 textures are missing for some tiles (i.e. white > > background) > > > > I suspect that I might be using osgDB::DatabasePager improperly. I have > tried > > sharing the same osgDB::DatabasePager across all osgViewer::Viewer > instances, > > and I have also tried using a unique osgDB::DatabasePager for each > > osgViewer::Viewer instance. What is the correct approach? > > > > Any ideas as to what I am doing wrong? Any suggestions for me to try? > > > > I am using OSG 2.4. > > > > Thanks, > > Justin > > _______________________________________________ > > 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 >
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