Ogre Atomsphere shader

最近在研究ogre的shader，看了一下官网的教程，鼓捣了一下午总算是把效果搞出来，贴一下关键代码：

createSphere("sphere",10);

createSphere("Atomsphere",11);
Ogre::Entity* PlanetEntity = mSceneMgr->createEntity("planet","sphere");
PlanetEntity->setMaterialName("Examples/Rockwall");
Ogre::Entity* AtmosphereEntity = mSceneMgr->createEntity("planet_atm_Ent","Atomsphere");
//assign it our material
AtmosphereEntity->setMaterialName ("Atmosphere");
//also this will make the atmosphere to be rendered behind the planet
AtmosphereEntity->setRenderQueueGroup (Ogre::RENDER_QUEUE_BACKGROUND);
//here you will replace PlanetRadius and AtmosphereRadius with your values
AtmosphereEntity->getSubEntity (0)->setCustomParameter (0, Ogre::Vector4(10,11,0,0));

Ogre::SceneNode* node1=mSceneMgr->getRootSceneNode()->createChildSceneNode();
node1->attachObject(PlanetEntity);
Ogre::SceneNode* node2=mSceneMgr->getRootSceneNode()->createChildSceneNode();
node2->attachObject(AtmosphereEntity);

// Set ambient light
mSceneMgr->setAmbientLight(Ogre::ColourValue(0.5, 0.5, 0.5));

// Create a light
Ogre::Light* l = mSceneMgr->createLight("MainLight");
l->setPosition(20,80,50);

其他的渲染代码、材质脚本代码与官网上的一样，至于那个createsphere是一个自定义函数，参见：

http://www.ogre3d.org/tikiwiki/ManualSphereMeshes