Hi JS, osg::View by default has a head light so you could just use this, or if you wish to use a LightSource in the scene graph then use the LightSource::setReferenceFrame(osg::LightSource::ABSOLUTE_RF) to put the light source in eye coordinates.
Robert. On Mon, Dec 8, 2008 at 8:36 PM, Jean-Sébastien Guay <[EMAIL PROTECTED]> wrote: > Hi all, > > Quick question. Say I want to make a headlight (like the light source that's > added to the viewer by default if no lights are in the model), where should > I add it in my graph? > > Say I have a single view with a single camera, I tried adding an osg::Light > to the camera's stateset. That doesn't work, the light seems to be in a > fixed position at all times, even if I move the camera around. > > Do I need a callback to explicitly change my light to match the view > direction each frame? I don't think the viewer needs that, I think it > happens automatically, because I can't find any code related to that... Then > again, the only code I can find related to the headlight is in > SceneView.cpp, where it says: > > if (_light.valid()) > renderStage->addPositionedAttribute(NULL,_light.get()); > > Not sure how I can do something equivalent from outside viewer code... > > Can anyone offer some guidance please? Thanks in advance, > > J-S > -- > ______________________________________________________ > Jean-Sebastien Guay [EMAIL PROTECTED] > http://www.cm-labs.com/ > http://whitestar02.webhop.org/ > _______________________________________________ > 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
