Time for action – Shot classes

To implement the shots that the enemy and the player will fire at each other, perform the following steps:

1. 1. Add a new class file called PlayerShot.cs to the Mars Runner project.

2. 2. Add the following using directives to the PlayerShot class:

   using Microsoft.Xna.Framework;
   using Microsoft.Xna.Framework.Graphics;

3. 3. Modify the declaration of the PlayerShot class to inherit from the GameEntity class. The new declaration should read as follows:

   class PlayerShot : GameEntity

4. 4. Add fields to the PlayerShot class as follows:

   #region Fields
   private Vector3 velocity = new Vector3(0, 30, 0);
   public bool IsActive;
   #endregion

5. 5. Add a constructor to the PlayerShot class as follows:

   #region Constructor
   public PlayerShot(
       GraphicsDevice device, 
       Model model, 
       Vector3 position)
       : base(device, model, position)
   {
       scale = 0.25f;
       IsActive = true;
   }
   #endregion

6. 6. Add the ResetShot() method to the PlayerShot class as follows:

   #region Helper Methods
   public void...