XNA 4.0 Game Development by Example Beginner's Guide

Time for action – firing shots

1. Add the FireShot() method to the ShotManager class:

   public void FireShot(
       Vector2 location,
       Vector2 velocity,
       bool playerFired)
   {
       Sprite thisShot = new Sprite(
           location, 
           Texture, 
           InitialFrame, 
           velocity);
   
       thisShot.Velocity *= shotSpeed;
   
       for (int x = 1; x < FrameCount; x++)
       {
           thisShot.AddFrame(new Rectangle(
               InitialFrame.X+(InitialFrame.Width * x),
               InitialFrame.Y,
               InitialFrame.Width,
               InitialFrame.Height));
       }
       thisShot.CollisionRadius = CollisionRadius;
       Shots.Add(thisShot);
   }

What just happened?

When a shot is fired, a new Sprite (called thisShot) is built using the parameters stored when the ShotManager class was constructed. The location and velocity are set according to the values passed to the FireShot() method. The ...