Add layer index to TMX-file. about tiled

[bjorn]

I think all that would do is for people to start worrying that the layers may not always be stored in-order or that gaps may exist in the layer stack. So, why?

[patriksvensson]

The main reason for asking this is that it makes it easier to parse the TMX-file. In my case I'm not retrieving nodes in the XML with an XPath expression (like map/layer|map/objectgroup) but parsing the different types of layers in order (tile layers then object groups). I could change this logic, but I thought it would be a good suggestion of not relying on the order things are written in the XML, but explicitly telling the order.

[bjorn]

Even if you first parse all tile layers and then all objects groups, you apparently iterated all of them at some point in order to determine which layers are there, and I don't see the problem with assigning them indexes in that moment.

Since this information is clearly redundant, I would prefer to leave it out.