Ogre Atomsphere shader - Ogre3d大气层着色器

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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 materialAtmosphereEntity->setMaterialName ("Atmosphere");//also this will make the atmosphere to be rendered behind the planetAtmosphereEntity->setRenderQueueGroup (Ogre::RENDER_QUEUE_BACKGROUND);//here you will replace PlanetRadius and AtmosphereRadius with your valuesAtmosphereEntity->getSubEntity (0)->setCu

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