XNA 4.0 Game Development by Example Beginner's Guide

Time for action – updating the WeaponManager class

1. Add a property to the Player class to create a shortcut to the square the player is currently located in:

   #region Properties
   public static Vector2 PathingNodePosition
   {
       get
       {
           return TileMap.GetSquareAtPixel(BaseSprite.WorldCenter);
       }
   }
   #endregion

2. Modify the tryToSpawnPowerup() method of the WeaponManager class and replace the if statement that checks to see if the tile the power-up is being placed on is a wall (it currently reads if (!TileMap.IsWallTile(x,y))) with the following:

   if (!(PathFinder.FindPath(
       new Vector2(x,y),
       Player.PathingNodePosition)==null))

3. Execute Robot Rampage and explore the map, looking for the power-ups.

What just happened?

Since the FindPath() method returns null immediately ...