-
- lightSource->addChild(sceneGroup);
- lightSource->addChild(thesky->getPreRoot());
- mRoot->addChild(lightSource);
-
+ lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
+ mRealRoot->addChild(lightSource);
+ // we need a white diffuse light for the phase of the moon
+ osg::LightSource* sunLight = new osg::LightSource;
+ sunLight->getLight()->setDataVariance(Object::DYNAMIC);
+ sunLight->getLight()->setLightNum(1);
+ sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
+ sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
+ sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
+ // Hang a StateSet above the sky subgraph in order to turn off
+ // light 0
+ Group* skyGroup = new Group;
+ StateSet* skySS = skyGroup->getOrCreateStateSet();
+ skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
+ skyGroup->addChild(thesky->getPreRoot());
+ sunLight->addChild(skyGroup);
+ mRoot->addChild(sceneGroup);
+ mRoot->addChild(sunLight);
+ // Clouds are added to the scene graph later