1. OGRE3D Base Environment Setup (Windows)
2. Object-Oriented Programming

Objectives:

1. Refactor the ogre head and pack it into an object

Descriptions:

1. Use Ogre AppWizard to create a new OGRE project

2. in the createScene method of your OgreApp

   Code Block
   language cpp title Creating the ogrehead and the ambient light linenumbers true
   void Refactoring101::createScene(void) { Ogre::Entity* ogreHead = mSceneMgr->createEntity("Head", "ogrehead.mesh"); Ogre::SceneNode* headNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(); headNode->attachObject(ogreHead); // 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); }

3. Read the code : to display a 3D object, there needs to be an Entity and a Node
   1. A node can contain multiple entities.
   2. Entity cannot have the same name.
   3. Node can be unmaned, but it will be hard to retrieve.
   4. Node with same name is also not allowed.
4. What we need is to put the ogrehead code into our custom class.
   1. Add file "HeadEntity.h" and "HeadEntity.cpp"
   2. The header file should be in <your project>\include and the cpp should be in <your project>\src (if you find error include cannot find "HeadEntity.h", it's probably because your .h file is outside include folder in the project root)
   3. Let's assume we only create one entity for each node for manipulation this time.
5. Code into both files:

   1. header

      Code Block
      language cpp title HeadEntity.h linenumbers true
      // Include used Ogre libraries #include <OgreEntity.h> #include <OgreSceneManager.h> #ifndef _HeadEntity_h_ #define _HeadEntity_h_ class HeadEntity{ public: HeadEntity(); ~HeadEntity(); protected: Ogre::Entity* mHeadEntity; Ogre::SceneNode* mHeadNode; }; #endif //_HeadEntity_h_

   2. cpp

      Code Block
      language cpp title HeadEntity.cpp linenumbers true
      #include "HeadEntity.h" HeadEntity::HeadEntity(){ } HeadEntity::~HeadEntity(){ }

6. Now what we want to refactoring into class are:

   1. The code that create the Ogrehead

      Code Block
      language cpp title Need refactor linenumbers true
      Ogre::Entity* ogreHead = mSceneMgr->createEntity("Head", "ogrehead.mesh"); Ogre::SceneNode* headNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(); headNode->attachObject(ogreHead);