Ogre 3D 1.7 Beginner's Guide

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Time for action — preparing a scene

We will use a slightly different version of the scene from the previous chapter:

Delete all code in the createScene() and the createCamera() functions.
Delete the createViewports() function.
Add a new member variable to the class. This member variable is a pointer to a scene node:
```
private:
Ogre::SceneNode* _SinbadNode;
```

Create a plane and add it to the scene using the createScene() method:

Ogre::Plane plane(Vector3::UNIT_Y, -10);
Ogre::MeshManager::getSingleton().createPlane("plane",
ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, plane,
1500,1500,200,200,true,1,5,5,Vector3::UNIT_Z);
Ogre::Entity* ent = mSceneMgr->createEntity("LightPlaneEntity", "plane");
mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(ent);
ent->setMaterialName("Examples/BeachStones");

Then add a light to the scene:

Ogre::Light* light = mSceneMgr->createLight("Light1");
light->setType(Ogre::Light::LT_DIRECTIONAL);
light->setDirection(Ogre::Vector3(1,-1,0));

We also need an instance of Sinbad; create a node and attach the instance to it:

Ogre::SceneNode* node = mSceneMgr->createSceneNode("Node1");
mSceneMgr->getRootSceneNode()->addChild(node);
Ogre::Entity* Sinbad = mSceneMgr->createEntity("Sinbad", "Sinbad.mesh");
_SinbadNode = node->createChildSceneNode("SinbadNode");
_SinbadNode->setScale(3.0f,3.0f,3.0f);
_SinbadNode->setPosition(Ogre::Vector3(0.0f,4.0f,0.0f));
_SinbadNode->attachObject(Sinbad);

We also want shadows in this scene; so activate them:

mSceneMgr->setShadowTechnique(SHADOWTYPE_STENCIL_ADDITIVE);

Create a camera and position it at (0,100,200) and let it look at (0,0,0); remember to add the code to the createCamera() function:

mCamera = mSceneMgr->createCamera("MyCamera1");
mCamera->setPosition(0,100,200);
mCamera->lookAt(0,0,0);
mCamera->setNearClipDistance(5);

Compile and run the application, and you should see the following image:

What just happened?

We used the knowledge from the previous chapters to create a scene. We should be able to understand what happened. If not, we should go back to the previous chapters and read them again until we understand everything.