Request: tile properties

[ghost]

Some information in a map doesn't need a particular image or region attached, but is simply required at one specific tile with no more details like pixel-exact position or an image associated with it.

Think e.g. of doors. Most likely, they are part of the tileset and part of the map geometry, but now you need to tell your engine where that door leads to. Placing an object on the door is a bit inconvenient because the door is already there (part of the tiles you used), also the engine then somehow needs to get from the object placed freely back to the tile you want to mark with it through some sort of rounding/guessing emchanism - so it simply contains more information than the engine might need in such a case, like an excessively detailed per-pixel position and dimensions (rectangle object things) or an image (tile objects).

For such cases where only some information is required only for a tile (not for an exact pixel position) without any fancy additions like a per-pixel sized area or an additional associated image, custom tile properties would be really nice to have.

[bjorn]

Duplicate of #31.