John, Node::accept is completely synchronous. When you call accept() it will traverse immediately and return.
Glenn On Tue, Sep 30, 2008 at 4:26 PM, Argentieri, John-P63223 < [EMAIL PROTECTED]> wrote: > Let's forget semantics then. > > If I run the following code: > > Node.accept( NodeVisitor& ); > Viewer.frame(); > > What thread calls the NodeVisitor's various accept() methods? Or at least > what stage of execution? Does the accept() call block until the NodeVisitor > traverses the scene graph, or does it happen in the Viewer's update > traversal? > ------------------------------ > *From:* [EMAIL PROTECTED] [mailto: > [EMAIL PROTECTED] *On Behalf Of *Tomlinson, > Gordon > *Sent:* Tuesday, September 30, 2008 2:44 PM > *To:* OpenSceneGraph Users > *Subject:* Re: [osg-users] NodeVisitors and Synchronization > > Hi > > You should not be doing this from the GUI thread, you should be doing this > typically in the OSG app thread, so you need to have some form of messaging > between the GUI and APP threads, such that you can kick off your > traversals at the appropriate time > > > *Gordon* > > __________________________________________________________ > *Gordon Tomlinson* > > *Product Manager 3D > **Email * : gtomlinson @ overwatch.textron.com* > * > > __________________________________________________________ > *(C): (+1) 571-265-2612 > (W)**: (+1) 703-437-7651* > > "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 *Argentieri, > John-P63223 > *Sent:* Tuesday, September 30, 2008 2:09 PM > *To:* [EMAIL PROTECTED] > *Subject:* [osg-users] NodeVisitors and Synchronization > > Folks, > > Once I've called Node::accept(NodeVisitor&), does osgViewer::Viewer wait > until the update traversal to let the NodeVisitor perform it's traversal? If > I am in the GUI thread when I call accept(), does NodeVisitor::apply happen > in the GUI thread? Or does it happen in an osgViewer thread based on the > threading model? > > I'm trying to make sure my NodeVisitor's have done their work before > reacting to osg::Camera's PostDraw callback. > > I am considering having nodes accept all visitors, waiting for a single > update callback, then registering for the osg::Camera's postdraw callback. > Do you guys think that will solve my synchronization problem? > > Thanks, > > *John Argentieri* > *Software Engineer* > *GENERAL DYNAMICS* > *C4 Systems * > [EMAIL PROTECTED] > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- Glenn Waldron : Pelican Mapping : http://pelicanmapping.com : +1.703.652.4791
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