Hi, no answers... So i've some questions to help me :
* Does light direction and spotcuttoff incompatibles with attenuations ? * how to compute good attenuation values ? * why all the scene seems to be lighted by a directional spotlight, including node behind spot, in the good direction ? * how to light a specified node, without (if possible) lightning the other one ? Thanks, Regards, Vincent. 2008/8/6 Vincent Bourdier <[EMAIL PROTECTED]> > Hi Robert, > > Yes I know, i forgot to paste the code : > > osg::ref_ptr<osg::Light> light1 = new osg::Light; > light1->setLightNum(1); > > Sorry > > Any idea ? because the red light is visible, but no attenuation modify > it... and this is the real problem. > Thanks, > > Vincent. > > 2008/8/6 Robert Osfield <[EMAIL PROTECTED]> > > Hi Vincent, >> >> You'll need to set the light number of the light via >> light->setLightNum(num); The first light should be 0, and your second >> one 1. >> >> Robert. >> >> On Wed, Aug 6, 2008 at 10:53 AM, Vincent Bourdier >> <[EMAIL PROTECTED]> wrote: >> > Hi all, >> > >> > I've a scene with 2 lights : >> > >> > The first one (n°0) is the one for the whole scene, with ambiant >> component, >> > diffuse, specular, ... >> > The second one is attached on a node, and have to light only this node >> and >> > not all the scene. >> > >> > To do that, I put some attenuation on the second light to avoid it light >> the >> > reste of the scene... but it does nothing ! >> > >> > light1->setAmbient(osg::Vec4(0.0f, 0.0f, 0.0f, 1)); >> > light1->setDiffuse(osg::Vec4(intensity, 0, 0, 1)); >> > light1->setSpecular(osg::Vec4(0.0f, 0.0f, 0.0f, 1)); >> > light1->setPosition(osg::Vec4(p1, 0)); >> > light1->setDirection(-p1); >> > light1->setSpotCutoff(0.5f); >> > light1->setConstantAttenuation(0.95f); >> > light1->setLinearAttenuation(0.0000001f); >> > light1->setQuadraticAttenuation(0.00000002f); >> > >> > osg::LightSource* satLightSource1 = new osg::LightSource; >> > satLightSource1->setLight(light1.get()); >> > satLightSource1->setLocalStateSetModes( osg::StateAttribute::ON ); >> > satLightSource1->getOrCreateStateSet()->setMode(GL_LIGHTING, >> > osg::StateAttribute::ON); >> > >> > osg::LightModel* lightModel1 = new osg::LightModel; >> > lightModel1->setAmbientIntensity(osg::Vec4(0.0f,0.0f,0.0f,1.0f)); >> > //0,0,0,1 >> > satLightSource1->getOrCreateStateSet()->setAttribute(lightModel1); >> > >> > group->addChild(satLightSource1); >> > >> > _root->getOrCreateStateSet()->setMode(GL_LIGHT1, >> > osg::StateAttribute::ON); >> > >> > When I modify quadratic attenuation and linear attenuation, nothing >> appear >> > to be changed in the scene, and a lot of nodes are lighted in red... >> > >> > Some idea why it doesn't works ? >> > Thanks, >> > >> > Regards, >> > Vincent. >> > >> > _______________________________________________ >> > 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 >> > >
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
