Layers and Tiles Confusion

Questions
1

I created a single layer, added tiles using a spritesheet that I created and exported it for use with Cocos2D.

The tiled map looks fine in Cocos2D, but I’m a little confused on how to determine which tile is which. I thought I could by using the local ID, but when I open up the tmx file in a text editor the numbers don’t match. I’m assuming it’s a GID which is fine, but I’m confused as to how I can know the identity of each tile within my game?

For example I made a background with TiledMap and for two specific tiles I would like to place another image over it dynamically.

2

Does

http://doc.mapeditor.org/reference/tmx-map-format/#data

help you here?

Basically you need to subtract the tileset gid from the id you read from the file (and deal with the bit masking used for rotating/flipping).

Regards,
Ablu

3

In such cases it is usually preferable to set a custom property on the tiles, identifying which other image should be placed over it dynamically. That way you avoid hardcoding tile indexes in your game. Just a suggestion.