I'm drawing osg::PrimitiveSet::LINES deep inside my node architecture. The lines come up the right color, but depending on the camera position, the line tends to turn black. I would like the line color to stay constant regardless of the camera position. >From doing some research it seems like my problem could be either normals or light source, but I've played with both a lot and can not get it to work. This is what my current settings are. Any suggestions would be greatly appreciated:
//add normals osg::Vec3Array* norms = new osg::Vec3Array(1); (*norms)[0] = osg::Vec3(1,0.0f,1.0f); (*norms)[0].normalize(); lineGeom->setNormalArray(norms); lineGeom->setNormalBinding(osg::Geometry::BIND_OVERALL); //add light ///////////////////////////////////////////////////////////////// //Add light source to geom osg::LightSource* lightSource = new osg::LightSource; osg::Light* light = lightSource->getLight(); osg::StateSet* statelightON_OVRD = mgroup->getOrCreateStateSet(); statelightON_OVRD->setAttribute(light, osg::StateAttribute::ON |osg::StateAttribute::PROTECTED ); statelightON_OVRD->setMode(GL_CULL_FACE,osg::StateAttribute::OFF ); light->setLightNum(1); // light->setPosition(osg::Vec4(0.0f,0.0f,0.0f,1.0f)); // directional light from above light->setAmbient(osg::Vec4(0.8f,0.8f,0.8f,1.0f)); light->setDiffuse(osg::Vec4(0.2f,0.2f,0.2f,1.0f)); light->setSpecular(osg::Vec4(0.2f,0.2f,0.2f,1.0f)); light->setSpotExponent(50.0); light->setDirection(osg::Vec3(1,1,-1)); statelightON_OVRD->setAttribute(light, osg::StateAttribute::ON); lineGroup->addChild(lightSource); Regards
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