This lab is to some extent based on Chapter 4 in the textbook, in particular sections 4.2.1 “Points and Cartesian Coordinates” and 4.2.4 “Vector Operations”.

Discussion thread for this lab is here: Lab 2 Discussion Thread

There are two main parts to this lab. In the first part, which has you thinking about coordinate systems, you create an animation effect that spins an object along a cylindrical path. In the second part, which focuses on vector operations, you use a simple dot product to find which direction you are facing relative to another object.

Make sure you have the following:

1. The completed Lab1 project (the optional steps are not necessary)
2. OgreMath.h included in your source file to access the Ogre::Math::Cos() and Ogre::Math::Sin() functions

Follow these steps to complete the lab project:

1. Create a New Project Create a new empty project called “Lab2” in the same solution as the previous lab project and copy your source files over there (make sure you copy them in the file system and don't just drag them around in the solutions browser, because by default the browser creates a symbolic link to the original file instead of copying). Rename source files as necessary. Unfortunately you'll have to review the configuration properties again for this project (see the instructions for Lab1), it is quite silly that those can't easily be copied between projects. After this step is done, you should have a new project that compiles and runs (and does the same thing as the previous lab).
2. Attach an Object to the Ogre You should create a new movable entity that will be attached to the Ogre entity (from Lab1) wherever it goes. Essentially this new entity, that we will call “The Cube”, will exist in the coordinate system of the Ogre model. To do this, you need to create a new SceneNode as a child of the Ogre's scene node, and attach the Cube to that node. This means that all transformations applied to the Ogre's scene node will be passed down into the Cube's scene node as well. So, do the following:
   1. Add a member variable to your application class to hold the old Ogre entity (e.g. “_myOgre”) and assign the entity to it when you create it in createScene
   2. Add a member variable to your application class to hold the new Cube entity (e.g. “_myCube”).
   3. In the createScene method, add the following (after you create the Ogre entity):
_myCube = _sceneManager→createEntity(“Cube.mesh”);
Ogre::SceneNode* cubenode =_myOgre→getParentSceneNode()→createChildSceneNode();
cubenode→attachObject(_myCube);
   4. You need to scale and then translate (position) the new Cube so that you can see it next to the Ogre:
cubenode→scale(0.01, 0.01, 0.01); Try different values
cubenode→setPosition(2.0, 0.0, 0.0); Notice that this is relative to the Ogre's model origin
3. Attach a Light to the Cube You can make it look like the Cube is a source of light that lights up the Ogre and casts a shadow on the ground. Simply attach a point light source to the Cube's scene node:
Ogre::Light* plight = _sceneManager→createLight(“Light2”);
plight→setType(Ogre::Light::LT_POINT);
cubenode→attachObject(plight);

Upload your commented source files into Lab2 in MySchool (zip them up if more than one). The lab projects will not be graded, but their completion counts towards your participation grade.