manbeardgames / monogame-astar-pathfinding Goto Github PK

	SquareGrid grid;
	AstarSearch pathfinder;

	public Game4() {
		graphics = new GraphicsDeviceManager(this);
		Content.RootDirectory = "Content";
		IsMouseVisible = true;
	}

	protected override void Initialize() {
		int width = 1280;
		int height = 736;
		graphics.PreferredBackBufferHeight = height;
		graphics.PreferredBackBufferWidth = width;
		graphics.ApplyChanges();

		Random rand = new Random();
		grid = new SquareGrid(23, 40);
		for (int x = 0; x < 40; x++) {
			for (int y = 0; y < 23; y++) {
				if (rand.NextDouble() < 0.1) {
					Location wall = new Location(x, y);
					grid.walls.Add(wall);

				}
			}
		}
		pathfinder = new AstarSearch(grid);

		base.Initialize();
	}

	protected override void LoadContent() {
		spriteBatch = new SpriteBatch(GraphicsDevice);
	}

	protected override void Update(GameTime gameTime) {
		float dt = (float)gameTime.ElapsedGameTime.TotalSeconds;
		Window.Title = (1 / dt).ToString();

		Location start = GetRandomLocation();
		Location goal = GetRandomLocation();

		if (start != goal) {
			if (!grid.walls.Contains(start) &&
				!grid.walls.Contains(goal)) {
				pathfinder = new AstarSearch(grid);
				pathfinder.CalculatePath(start, goal);
			}
		}

		base.Update(gameTime);
	}

	protected override void Draw(GameTime gameTime) {
		GraphicsDevice.Clear(Color.CornflowerBlue);

		spriteBatch.Begin();

		for (int x = 0; x < 40; x++) {
			for (int y = 0; y < 23; y++) {
				Location cell = new Location(x, y);
				Rectangle rect = new Rectangle(cell.X, cell.Y, 32, 32);
				if (cell == pathfinder.Start) {
					spriteBatch.FillRectangle(rect.X * 32, rect.Y * 32, 32, 32, Color.Red);
				}
				else if (cell == pathfinder.Goal) {
					spriteBatch.FillRectangle(rect.X * 32, rect.Y * 32, 32, 32, Color.Green);
				}
				else if (grid.walls.Contains(cell)) {
					spriteBatch.FillRectangle(rect.X * 32, rect.Y * 32, 32, 32, Color.White);
				}
				else if (pathfinder.Path.Contains(cell)) {
					spriteBatch.FillRectangle(rect.X * 32, rect.Y * 32, 32, 32, Color.Blue);
				}
			}
		}

		spriteBatch.End();

		base.Draw(gameTime);
	}

	Location GetRandomLocation() {
		Random rand = new Random();
		int x = rand.Next(0, 40);
		int y = rand.Next(0, 23);
		return new Location(x, y);
	}
}`