Hi, Shuiying about first question: osg::LightSource designed mainly to position light in scene. Light will affect nodes which have enabled GL_LIGHTx (with x same as light index in lightsource) in all scene. LightSource have stateset which by default enables appropriate mode (GL_LIGHTx) for scene graph under it. This behaviour is controllable through public interface.
Cheers, Sergey. 18.05.2012, 20:19, "wang shuiying" <[email protected]>: > Hello, > > I have 2 questions about the lightSource node. > > (1) Does lightSource affect all the geode nodes in the scenedata or > only the ones that are under it in the sceneData structure? > (2) In my application, a lightSource is attached to the main sceneNode, > and this lightSource has a osg::group node (NodeA)as its child which > contains several 3D models . There is also a pre render camera attached > to the lightSource, and that pre render camera also has NodeA as child. > When I set > lightSource->setReferenceFrame(osg::LightSource::ABSOLUTE_RF), the color > of the texture from the prerender camera varies as I use mouse to change > the orientation of master camera displaying the 3D view. I don't know > what is happening here. In my opinion, as the position and orientation > of the pre render camera relative to the static 3D objects stay the > same, the texture color should be the same too. > > When Relative_RF is assigned, then the texture keeps the same however I > change the master camera. > > Can anyone give me some hints on that? > > Thanks a lot in advance! > > Best regards > > Shuiying > _______________________________________________ > 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
