Hi David, Rather than use callbacks perhaps the osg::AutoTransform is what you require. Or perhaps just use osg::Point/osg:::PointSprite. Generally the more you can push down onto the GPU the better.
Robert. On Mon, Jun 16, 2008 at 12:08 PM, David _ <[EMAIL PROTECTED]> wrote: > i want to traverse the scene graph and update some sprites size according to > their distance to the camera > > if i have some views i need to correct the size of every one of them just > before the render. > > We have our own camera class, so there is no need to read anything from the > osg::camera, just want to change some node´s properties in the graph just > before each render call > > also in the near future we will reduce particle emission rate if the > particle emitter is far away from the camera > > >> Date: Mon, 16 Jun 2008 12:00:14 +0100 >> From: [EMAIL PROTECTED] >> To: [email protected] >> Subject: Re: [osg-users] question about composite viewer >> >> Hi David, >> >> You don't say what operations you are actually wanting to do. Is it >> OpenGL ops? Or just CPU based code that needs the final view matrix >> from each of the viewers cameras? >> >> Robert. >> >> On Mon, Jun 16, 2008 at 11:09 AM, David _ <[EMAIL PROTECTED]> >> wrote: >> > Hi >> > >> > we´ve got multiple views using the composite viewer >> > >> > right now we are doing some stuff to some nodes of the graph using the >> > distance to our own camera as a parameter >> > >> > we do it between the update and the render >> > >> > osg_composite_viewer->advance(); >> > osg_composite_viewer->eventTraversal(); >> > osg_composite_viewer->updateTraversal(); >> > >> > // our stuff goes here using our camera for this view >> > >> > osg_composite_viewer->renderingTraversals(); >> > >> > our problem is that we would like to do these things before each view >> > gets >> > rendered and the composite viewer encapsulates all the renders in just >> > one >> > function call. We would like to make some things before each render call >> > >> > Is there any way of executing some code before each one of the composite >> > views get rendered??? a callback or something?? >> > >> > thanks >> > >> > ________________________________ >> > Todo ruedas: información práctica y todo el glamour del mundo del motor. >> > MSN >> > Estilo y Tendencias >> > _______________________________________________ >> > 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 > > ________________________________ > Sigue de cerca las últimas tendencias y lo que más rompe MSN Vídeo > _______________________________________________ > 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
