Hi Paul, thanks a lot you're right ! adding a stateattribute made my callback beeing traversed...
just one last question : my callback is a structure, and there is no traverse() method to call... is it a problem ? Thanks Regards, Vincent. 2008/8/7 Paul Melis <[EMAIL PROTECTED]> > Hi, > > Try adding your osg::Light to a StateSet, i.e. (pseudocode) > > group = osg::Group() > lightsource = osg::LightSource() > light = osg::Light() > light.setLightNum(0) > .... > lightsource.setLight(light) > group.addChild(lightsource) > group.getOrCreateStateSet().setAttribute(light, osg::StateAttribute::ON) > > viewer.setSceneData(group) > > It seems StateAttribute callbacks are only called when the attribute is set > on a StateSet. > Setting the light as state attribute on "lightsource" does not seem to > work, which is a bit surprising as a osg::LightSource is a Group and > therefore also has a StateSet. > Actually, I find the whole Light / LightSource (which is a Group) / Light > set as a StateAttribute a bit confusing. > > Paul > > > Vincent Bourdier wrote: > >> Hi, >> >> I just need to move a light, and for that I try to use a callback. >> So I implement a simple class lightMoveCallback : public >> osg::StateAttribute::Callback >> >> with virtual void operator()(osg::StateAttribute* ss, osg::NodeVisitor* >> nv); >> >> but the callback is never called... >> >> I use : >> light->setUpdateCallback(new lightMoveCallback()) >> thanks for help, >> >> Regards, >> Vincent. >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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