Map.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class Map {
    private Tile.TileTypes[,] _tileTypesLayout;
    private int _width, _height;
    private int _offsetX, _offsetY;

    //North node
    private Map _north;
    public Map North {
        get {
            if (_north == null) {
                _north = new Map(_width, _height, _offsetX, _offsetY - 1);
                _north.South = this;

                if (_west != null)
                    _north.SouthWest = _west;
                if (_northWest != null)
                    _north.West = _northWest;
                if (_northEast != null)
                    _north.East = _northEast;
                if (_east != null)
                    _north.SouthEast = _east;

            }
            return _north;
        }
        set { _north = value; }
    }

    //South node
    private Map _south;
    public Map South {
        get {
            if (_south == null) {
                _south = new Map(_width, _height, _offsetX, _offsetY + 1);
                _south.North = this;

                if (_southWest != null)
                    _south.West = _southWest;
                if (_west != null)
                    _south.NorthWest = _west;
                if (_east != null)
                    _south.NorthEast = _east;
                if (_southEast != null)
                    _south.East = _southEast;

            }
            return _south;
        }
        set { _south = value; }
    }

    //East node
    private Map _east;
    public Map East {
        get {
            if (_east == null) {
                _east = new Map(_width, _height, _offsetX + 1, _offsetY);
                _east.West = this;

                if (_south != null)
                    _east.SouthWest = _south;
                if (_southEast != null)
                    _east.South = _southEast;
                if (_northEast != null)
                    _east.North = _northEast;
                if (_north != null)
                    _east.NorthWest = _north;

            }
            return _east;
        }
        set { _east = value; }
    }

    //West node
    private Map _west;
    public Map West {
        get {
            if (_west == null) {
                _west = new Map(_width, _height, _offsetX - 1, _offsetY);
                _west.East = this;

                if (_south != null)
                    _west.SouthEast = _south;
                if (_southWest != null)
                    _west.South = _southWest;
                if (_northWest != null)
                    _west.North = _northWest;
                if (_north != null)
                    _west.NorthEast = _north;

            }
            return _west;
        }
        set { _west = value; }
    }


    //NorthEast node
    private Map _northEast;
    public Map NorthEast {
        get {
            if (_northEast == null) {
                _northEast = new Map(_width, _height, _offsetX + 1, _offsetY - 1);
                _northEast.SouthWest = this;

                if (_north != null)
                    _northEast.West = _north;
                if (_east != null)
                    _northEast.South = _east;

            }
            return _northEast;
        }
        set { _northEast = value; }
    }

    //NorthWest node
    private Map _northWest;
    public Map NorthWest {
        get {
            if (_northWest == null) {
                _northWest = new Map(_width, _height, _offsetX - 1, _offsetY - 1);
                _northWest.SouthEast = this;

                if (_north != null)
                    _northWest.East = _north;
                if (_west != null)
                    _northWest.South = _west;

            }
            return _northWest;
        }
        set { _northWest = value; }
    }

    //SouthEast node
    private Map _southEast;
    public Map SouthEast {
        get {
            if (_southEast == null) {
                _southEast = new Map(_width, _height, _offsetX + 1, _offsetY + 1);
                _southEast.NorthWest = this;

                if (_south != null)
                    _southEast.West = _south;
                if (_east != null)
                    _southEast.North = _east;

            }
            return _southEast;
        }
        set { _southEast = value; }
    }

    //SouthWest node
    private Map _southWest;
    public Map SouthWest {
        get {
            if (_southWest == null) {
                _southWest = new Map(_width, _height, _offsetX - 1, _offsetY + 1);
                _southWest.NorthEast = this;

                if (_west != null)
                    _southWest.North = _west;
                if (_south != null)
                    _southWest.East = _south;

            }
            return _southWest;
        }
        set { _southWest = value; }
    }
    
    public Map(int width, int height, int offsetX, int offsetY) {
        _tileTypesLayout = new Tile.TileTypes[width, height];
        _offsetX = offsetX;
        _offsetY = offsetY;
    }

    public void SetTileType(int x, int y, Tile.TileTypes t) {
        _tileTypesLayout[x, y] = t;
    }

    public Tile.TileTypes TileTypeAt(int x, int y) {
        return _tileTypesLayout[x, y];
    }
}