HI Christian, You application has complete control of when and how Viewer::updateTraversal() gets called. You could not bother calling updateTraversal() in your frame loop, and just do you own update management or subclass from Viewer::updateTraversal() and implement the ordering just how you want.
Robert. On 19 February 2015 at 13:32, Christian Buchner <[email protected] > wrote: > Hi all, > > I have a class derived from UpdateOperation() that inserts and removes > things into and from the scene graph. > > There is a bit of a problem as it appears that MyUpdateOperation() is > called after the update callback of other scene graph obkects (like e.g. > InstanceCallback::update()). In my case the InstanceCallback sets the > number of instances to be drawn in some DrawInstanced geometry. > > InstanceCallback::update(this=000000CE43999C60, frame no=198) > InstanceCallback::update(this=000000CE43999E20, frame no=198) > InstanceCallback::update(this=000000CE4399AE50, frame no=198) > InstanceCallback::update(this=000000CE4399B470, frame no=198) > InstanceCallback::update(this=000000CE4399BE10, frame no=198) > MyUpdateOperation()::update(this=000000CE0DB788A0, frame no=198) > SelectiveCullCallback::cull(this=000000CE43998A70, frame no=198) > SelectiveCullCallback::cull(this=000000CE43999D40, frame no=198) > SelectiveCullCallback::cull(this=000000CE43999E90, frame no=198) > SelectiveCullCallback::cull(this=000000CE4399A8A0, frame no=198) > > The effect of this is that when MyUpdateOperation removes one instanced > geometry and adds a different one to be shown in its place, there is one > frame where the InstanceCallback::update() is missing, and hence during > this single video frame there is no instanced geometry on screen. > > Is there a way to prioritize the UpdateOperation a bit higher, so that it > is called before other update() calls on scene graph objects? > > Christian > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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