XNA 4.0 Game Development by Example Beginner's Guide

Time for action – rotating pieces

1. Open your existing Flood Control project in Visual C# Express if it is not already active.
2. Add a new class to the project called "RotatingPiece".
3. Add "using Microsoft.Xna.Framework;" to the using area at the top of the class.
4. Update the declaration of the class to read class RotatingPiece : GamePiece.
5. Add the following declarations to the RotatingPiece class:

   public bool clockwise;
   
   public static float rotationRate = (MathHelper.PiOver2 / 10);
   private float rotationAmount = 0;
   public int rotationTicksRemaining = 10;

6. Add a property to retrieve the current rotation amount:

   public float RotationAmount
   {
       get 
       {
           if (clockwise)
               return rotationAmount;
           else
               return (MathHelper.Pi*2) - rotationAmount;            
       }
   }

7. Add a constructor for the ...