Thanks, Glenn. I must have made some other kind of mistake then :( ________________________________
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Glenn Waldron Sent: Tuesday, September 30, 2008 4:44 PM To: OpenSceneGraph Users Subject: Re: [osg-users] NodeVisitors and Synchronization 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.or g -- Glenn Waldron : Pelican Mapping : http://pelicanmapping.com : +1.703.652.4791
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