[crossfire] Vertical map-tiling

[Mark Wedel]

Nicolas Weeger wrote:
> Hello.
> 
> I remember, quite a long time ago, discussion about "vertical" map-tiling, 
> that is from eg the top of a tower see the ground below, belonging to another 
> map.
> Anyone remember that, and how it was implemented?
> 
> I think it was like the 4 other map tiles, except used in a different way.

  Don't know if it was ever really done, but I know it was theoretically possible.

  If we presume a square building with an interior courtyard, your first level 
would have to consist of at least 5  maps:

  123
  456
  789

  With the 5 map being common to all levels.  You have to use 9 maps, because 
when tiling, the map has to tile with a map the same size, and can only tile to 
1 map in each direction.

  So for second level, you would do something like:
  ABC
  D5E
  FGH

  And so on as you go up.  Note that you have the layers below visbile to the 
next layer - perhaps the next layer, the main building doesn't go up, just 
towers at the corners, so could do something like:
  IBJ
  D5E
  KGL

  Note that you would basically use the inverse for layers 1 and 2 if you wanted 
a central tower that could see the terrain around it.  and I believe I have a 
simple example in the test directory of a two store house which is done as:
12  and 13, where 1 is the common front yard, with 2 and 3 being the floors.