What kind of performance penalty is there for adding the dynamic flag to text, if, say, you're dealing with 10's of thousands of text objects?
--- Robert Osfield <[EMAIL PROTECTED]> wrote: > Hi Gert, > > Glad to hear that you have your app back up and > running. > > I do wonder if it would be worth use adding a > setDataVariance(DYNAMIC) > any time a user applies an update callback to a > Drawable of StateSet, > its perhaps a little overprotective but as this > problem seems to > biting a number of developers perhaps its > reasonable. > > Robert. > > On 9/14/07, Gert van Maren <[EMAIL PROTECTED]> wrote: > > Hi Robert, > > > > > Is this in your own application or one of the > OSG examples? > > > > It is our own app. > > > > > Are you creating text and then updating per > frame? > > > > We're creating text and using UpdateCallback to > add. > > > > > Are you running osgViewer multi-threaded? If so > which threading model? > > > > Well when I run dual core the OSG automatically > picks the > > DrawThreadPerContext model -> crash. If I turn > dual core off -> > > SingleThread no crash. > > > > > One possibility is that the new > DrawThreadPerContext threaded model is > > > overlapping the drawing of the text with any > updating of the text. > > > The way to prevent problems like this is to > explictly set the data > > > variance on the text to DYNAMIC so that the draw > traversal knows to > > > hold back the next frame till all the dynamic > objects have been > > > dispatched. You can ensure this via: > > > > myText->setDataVariance(osg::Object::DYNAMIC); > > > > Great, that did the trick > > > > Thanks Robert. > > > > > > > > > > -- > > Gert van Maren > > > > Head of Research & Development > > K2Vi Virtual Reality Software > > Data Interface Technologies Ltd > > > > Phone: +64 21 2855581 > > Email: [EMAIL PROTECTED] > > Web: http://www.k2vi.com > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
