Hi John, The EventQueue is entirely passive, you push events into it, and your periodically read from them. The EventQueue is very unlikely to cause any hold up.
Robert. On 1/16/07, Whitfield, John M. (SED/TMI) <[EMAIL PROTECTED]> wrote:
I don't know for sure that the event queue is the problem, since the other version I have that is built around osgsimpleviewerQT3 behaves the same way. I do know that it also has an event queue though. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: Tuesday, January 16, 2007 3:21 PM To: osg users Subject: Re: [osg-users] EventQueue Question Hi John, The OSG is design to have three main phase - update, cull and draw. The update phase includes the update traversal of the scene, and the event traversal - this phase is deliberately single threaded as to avoid the need to multi-buffer the scene graph. The cull-draw traversals can safely run multi-threaded as they are read only. The EventQueue itself support multi-threaded reading and writing, that is you can write to it from one thread, and read from it from another. The thread reading it will be the one doing the update and event traversals, the thread filling it might be this same thread or a background thread. The event traversal doesn't and shouldn't run in parallel to the cull-draw though. As to whether this at all related to what you are trying to achieve I can not say, I'm not familiar with qtosgwidget. Robert. On 1/16/07, Whitfield, John M. (SED/TMI) <[EMAIL PROTECTED]> wrote: > I was looking more into the operation of qtosgwidget, and it uses the > eventqueue to keep up with mouse inputs. Is there a chance that this > is preventing the mouse inputs from being process before the end of > its drawing operations? If so does anyone know a way around this, or > to make it check the que while its drawing? > > Thanks, > -John > _______________________________________________ > osg-users mailing list > osg-users@openscenegraph.net > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/ _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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