Hi Christoph, I would have thought it would work, but haven't tried this specifically myself.
Older versions of the OSG didn't have support for calling update callbacks on view(er) Camera's. I've just had a look at 3.2, 3.4 and 3.6/master and then all look to the have the code to do the update traversal on the view's master and slave Camera. A fall-back would be to assign an update/event callback to the Camera to do the update. Robert. On 14 May 2018 at 08:08, Christoph Dohmen <[email protected]> wrote: > Hi Robert, > > I just tried the uniform setting for the camera and it worked quite nice. > But I'm not able to use a callback to do the updating stuff :-(. > > I tried to install this callback: > > > Code: > > struct ViewportCallback : public osg::Uniform::Callback > { > ViewportCallback( osg::Camera* camera ) > : _camera( camera ) > { > std::cout << "ViewportCallback::ViewportCallback()" << std::endl; > } > > virtual void operator()( osg::Uniform* uniform, osg::NodeVisitor* /*nv*/) > { > std::cout << "ViewportCallback::operator()" << std::endl; > osg::Viewport * vp( _camera->getViewport() ); > uniform->set( osg::Vec4( vp->x(), vp->y(), vp->width(), vp->height() > ) ); > } > > osg::Camera* _camera; > }; > > > > > and set it via > > > Code: > > osg::Viewport * vp( viewer.getCamera()->getViewport() ); > osg::Uniform * viewportUniform = new osg::Uniform( "viewport", osg::Vec4( > vp->x(), vp->y(), vp->width(), vp->height() ) ); > viewportUniform->setUpdateCallback( new ViewportCallback( > viewer.getCamera() ) ); > viewer.getCamera()->getOrCreateStateSet()->addUniform( viewportUniform ); > > > > > But I don't get any output from operator() nor do I get an updated viewport > value in my shader. > > What's wrong with this? > > > Thank you! > > Cheers, > Christoph > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=73632#73632 > > > > > > _______________________________________________ > 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
