Time for action – rotating the cube

1. 1. Add the following declaration to the Fields region of the Cube class:

   private float rotation = 0f;
   private float zrotation = 0f;

2. 2. Add an Updat e() method to the Cube class as follows:

   #region Update 
   public void Update(GameTime gameTime)
   {
       rotation = MathHelper.WrapAngle(rotation + 0.05f);
       zrotation = MathHelper.WrapAngle(zrotation + 0.025f);
   }
   #endregion

3. 3. In the Draw() method of the Cube class, add two new items to the list of the generated matrices:

   Matrix rot = Matrix.CreateRotationY(rotation);
   Matrix zrot = Matrix.CreateRotationZ(zrotation);

4. 4. Still in the Draw() method, replace the current line that sets effect.World with the following:

   effect.World = center * rot * zrot * scale * translate;

5. 5. In the Update() method of the CubeChaserGame class, add the following line right before the existing call to base.Update(gameTime):

   cube.Update(gameTime);

6. 6. Execute your game and turn to face the cube:

   

What just happened?

Just like translation and scaling...