HI Its something as simple as the the triangles of the terrain/runway are bigger than the cone of the spot light is it ?
For reference http://www.vis-sim.com/imgdp/vp_lights_ex2.jpg Just a thought, -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chris Best Sent: Tuesday, April 22, 2008 6:02 PM To: OpenSceneGraph Users Subject: [osg-users] Spotlight only affecting parts of scene despite changesto root stateSet First time posting to the list, so please bear with me... I'm currently trying to attach a lightsource node to the front end of an aircraft model in the application I'm working on that acts as a spotlight (to simulate landing lights/head lights). Even though I am setting the stateset up how (I think) I am supposed to, as such: lightNode->setStateSetModes(*root->getOrCreateStateSet(),osg::StateAttri lightNode->bute::ON); The spotlight is only affecting the plane model (and some billboards way off in the background if I aim it at them), and not the runway. I even went as far as to make a nodeVisitor and traverse the entire scene graph calling the light source's setStateSetModes() on every osg::Node in it, no dice. I can think of a couple weird things we do that might affect things since I'm not sure how they interact with LightSource nodes: 1) My terrain is drawn in renderbin 1, aircraft shadows in renderbin 3, and aircraft in renderbin 9. Due to some complications with our application, we can't use the osgShadow nodekit so we're using plain old projected shadows for now. The terrain in renderbin 1 puts 1s into the stencil buffer and the shadows in renderbin 3 only draw where the stencil buffer is 1 and reset it back to zero, to prevent a pixel from being shadowed twice. The shadow pass is implemented by having an osg::MatrixTransform with the shadow projection matrix for light 0 (the sun) which has as its child the group node containing all the aircraft in the scene. Do I have to worry about the renderbin that the lightsource is in? 2) To prevent the osgSim::LightPoints on the aircraft (as well as text labels and other junk) from being drawn as shadows, I unset the highest bit of the nodemask for the objects I don't want drawn and then I modify the cull visitor's mask with a callback when it passes through my shadow matrix to only have the highest bit set. The group the osg::LightSource is under does not have its highest bit set, but it should still get visited when the aircraft group gets visited (as evidenced by the fact that it does light up the aircraft it is attached to)... Am I not understanding some default magic about bits in nodemasks? At this point I'm lost. I'm still not sure how things like render bins and nodemasks affect lightsources in the scene graph, but maybe I'm barking up the wrong tree worrrying about that. Anything obvious it seems I've missed? If more info is needed, please let me know, and I'll go into as much detail as possible. Thanks! -Chris B _______________________________________________ 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
