Procedurally generating a tilemap

[seiyria]

Currently, I'm trying to take my 2d array and make a tilemap out of it. Unfortunately, I hit a wall right away, and I can't seem to find any examples of doing this. Here's what I've got:

 

  var map = new MapGenerator(pregens.openworld1);  var tilemap = new Phaser.Tilemap(this.game, null, 32, 32, map.worldWidth, map.worldHeight);  tilemap.addTilesetImage('DungeonA2', 'DungeonA2', 32, 32, 0, 0, 0);  tilemap.addTilesetImage('WorldA2', 'WorldA2', 32, 32, 0, 0, 192);

where map basically returns my "world" object. I'm trying to add tileset images but it keeps failing. In my preload state, I have this:

    this.load.spritesheet('DungeonA2', 'assets/sprites/tiles/Dungeon_A2.png', 32, 32);    this.load.spritesheet('WorldA2', 'assets/sprites/tiles/World_A2.png', 32, 32);

so those keys should definitely exist in the cache, but yet it fails with "cannot read property cache of undefined" on tilemap.addTilesetImage.

 

Any ideas what I'm doing wrong?