XNA 4.0 Game Development by Example Beginner's Guide

Time for action – the PathNode class

1. Add a new class called PathNode to the Robot Rampage project.
2. Add the following using directive to the top of the class file:

   using Microsoft.Xna.Framework;

3. Add declarations to the PathNode class:

   #region Declarations
   public PathNode ParentNode;
   public PathNode EndNode;
   private Vector2 gridLocation;
   public float TotalCost;
   public float DirectCost;
   #endregion

4. Add properties to the PathNode class:

   #region Properties public Vector2 GridLocation { get { return gridLocation; } set { gridLocation = new Vector2( (float)MathHelper.Clamp(value.X,0f,(float)TileMap.MapWidth), (float)MathHelper.Clamp(value.Y,0f,(float)TileMap.MapHeight)); } } public int GridX { get { return (int)gridLocation.X; } } public int GridY { get { return ...