Building a TileMap at runtime

Hi guys,

I have a few hundred tiles that I created from sprites in a palette. I'm trying to figure out how to load these at runtime and apply them to a TileMap using C# for a 2D map.

So something like this codewise:

Code (CSharp):

1.  
2. for(x=0; x<200; x++) {
3.   for(y=0; y<200; y++) {
4.     map.SetTile(new Vector3Int(x, y, 0), GetTileForMap(world[x,y]));
5.   }
6. }
7.  
8. Tile GetTIleForMap(int tileType)
9. {
10.   // fetch a tile asset named "tiles_" + tileType
11.   return tile;
12. }
13.  

The map is a reference to my TileMap in the scene.
world is a 2D array holding the type of ground at that x, y location (grass, water, etc.) built from a spritesheet of tiles that was used to generate the tile palette.

All tile assets (created when I dragged my spritesheet into the palette) are "tile_x.asset" files in a folder under Assets/Tiles.

I thought I could use Resource.Load on this but since they're not in a resources folder I can't do that. Otherwise I could do something like Resource.Load<Tile>("tiles_" + tileType) right? (only loading it once so I don't load the same tile asset over and over again). That would require me to move all the tile.asset files into a resources folder. Or is there something I'm missing like a way to reference a tile asset in the palette using it's x, y value or index?

Thanks

 

I solved this by creating a prefab that has a script that keeps references to all the different tiles I use on a given level. I just drag on the different tiles to the correct TileBase property in the Inspector for this prefab. This prefab gets instantiated on each level before I start call SetTile. Mine looks something like this.

Code (CSharp):

1. public class ThemeResources : MonoBehaviour
2. {
3.     [Header("Slopes")]
4.     public TileBase slopeLeftA;
5.     public TileBase slopeLeftB;
6.     public TileBase slopeRightB;
7.     public TileBase slopeRightA;
8.  
9.     public TileBase angleLeft;
10.     public TileBase angleRight;
11.  
12.     [Header("Bounds")]
13.     public TileBase[] blocks;
14. }

You could just add a public function to this class to access the different tiles like this:

Code (CSharp):

1. TileBase GetTileForMap(int tileType)
2. {
3.   return blocks[tileType];
4. }

I found this gave me a lot of flexibility to write custom functions that for things like grabbing random blocks.