I wanna add a head light into the scene, ie.,the light is always attched with camera.
For adding a light source into the scene, there are two different ways as i know: 1 using osg::LightSource:: setLight method osg::LightSource* ls = new osg::LightSource; ls->setLight(new osg::Light(0)); ls->setReferenceFrame(osg::LightSource::ABSOLUTE_RF); geode->setStateSet(ls->getOrCreateStateSet()); 2 using setAttribute method ls->getOrCreateStateSet()->setAttribute(new osg::Light(0)); geode->setStateSet(ls->getOrCreateStateSet()); I think two different ways should give the same result. Actually, they are different. No. 1 Method: the light behaves like directional light, but not head light. No.2 method: just like head light. who could tell me why the two ways are different? which is correct? Rogerz 2010-08-30
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