public IEnumerable<Tile> GetNeighbours(TileMap map)
{
if (this.MapX > 0) yield return map[this.MapX - 1, this.MapY];
if (this.MapX < map.Width - 1) yield return map[this.MapX + 1, this.MapY];
if (this.MapY > 0) yield return map[this.MapX, this.MapY - 1];
if (this.MapY < map.Height - 1) yield return map[this.MapX, this.MapY + 1];
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
// Debug component
this.Components.Add(new DebugComponent(this));
// Controller components
this.Components.Add(new MouseManager(this));
this.Components.Add(new KeyboardManager(this));
// TileMap
this.tileMap = new TileMap(this, 60, 40);
this.Components.Add(tileMap);
// FPS counter
this.Components.Add(new FrameRateCounter(this));
base.Initialize();
}
public static void RandomizeTiles(TileMap tileMap)
{
// Randomize entry & exit
tileMap.Entry = tileMap[random.Next(0, tileMap.Width), random.Next(0, tileMap.Height)];
tileMap.Exit = tileMap.Entry;
while (tileMap.Exit == tileMap.Entry)
{
tileMap.Exit = tileMap[random.Next(0, tileMap.Width), random.Next(0, tileMap.Height)];
}
tileMap.Entry.Type = TileType.Entry;
tileMap.Exit.Type = TileType.Exit;
AddRandomWalls(tileMap);
tileMap.PathOrigin = tileMap.Entry;
}
private static void ClearWalls(TileMap tileMap)
{
foreach (Tile tile in tileMap.Tiles)
{
tile.IsVisited = false;
tile.Ancestors.Clear();
tile.Next = null;
if (tile.Type == TileType.Exit)
{
tile.DistanceToExit = 0;
}
else
{
tile.DistanceToExit = double.MaxValue;
}
if (tile.Type == TileType.Wall)
{
tile.Type = TileType.Free;
}
}
}
private static void AddRandomWalls(TileMap tileMap)
{
do
{
ClearWalls(tileMap);
foreach (Tile tile in tileMap.Tiles)
{
if (tile.Type == TileType.Entry || tile.Type == TileType.Exit)
continue;
if (random.NextDouble() < 0.3)
tile.Type = TileType.Wall;
}
tileMap.UpdateTiles();
} while (tileMap.Entry.Next == null);
foreach (Tile tile in tileMap.Tiles)
{
if (tile.Type == TileType.Free && tile.Next == null)
tile.Type = TileType.Wall;
}
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
MouseManager mouseManager = this.Services.GetService<MouseManager>();
KeyboardManager keyboardManager = this.Services.GetService<KeyboardManager>();
// Allows the game to exit
if (keyboardManager.CurrentState.IsKeyDown(Keys.Escape))
this.Exit();
if (keyboardManager.IsKeyPressed(Keys.R) && keyboardManager.CurrentState.IsKeyDown(Keys.LeftControl))
{
this.Components.Remove(this.tileMap);
this.tileMap = new TileMap(this, 60, 40);
this.Components.Add(this.tileMap);
}
if (mouseManager.CurrentState.X > 0 && mouseManager.CurrentState.X < GraphicsDevice.Viewport.Width && mouseManager.CurrentState.Y > 0 && mouseManager.CurrentState.Y < GraphicsDevice.Viewport.Height)
{
Tile hitTile = tileMap.GetTileAt(mouseManager.CurrentState.X, mouseManager.CurrentState.Y);
tileMap.HoverTile = hitTile;
if (hitTile != null)
{
if (mouseManager.LeftClick)
{
if (keyboardManager.CurrentState.IsKeyDown(Keys.LeftControl))
{
if (hitTile.Type == TileType.Free)
this.tileMap.AddWall(hitTile.MapX, hitTile.MapY);
else if (hitTile.Type == TileType.Wall)
this.tileMap.RemoveWall(hitTile.MapX, hitTile.MapY);
}
else
{
this.tileMap.PathOrigin = hitTile;
}
}
}
}
base.Update(gameTime);
}