Using 3D space guides

We will try to use built-in Cinder methods to visualize some basic information about the scene we are working on. It should make working with 3D space more comfortable.

Getting ready

We will need the MayaCamUI navigation that we have implemented in the previous recipe.

How to do it...

We will draw some objects that will help to visualize and find the orientation of a 3D scene.

1. We will add another camera besides MayaCamUI. Let's start by adding member declarations to the main class:

   CameraPersp     mSceneCam;
   int             mCurrentCamera;

2. Then we will set the initial values inside the setup method:

   mCurrentCamera = 0;
       
   mSceneCam.setEyePoint(Vec3f(0.f, 5.f, 10.f));
   mSceneCam.setViewDirection(Vec3f(0.f, 0.f, -1.f) );
   mSceneCam.setPerspective(45.0f, getWindowAspectRatio(), 0.1, 20);

3. We have to update the aspect ratio of mSceneCamera inside the resize method:

   mSceneCam.setAspectRatio(getWindowAspectRatio());

4. Now we will implement the keyDown method that will switch between two...