[Freeciv-Dev] Re: (PR#7287) Extended Topologies

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=7287 >

rwetmore@xxxxxxxxxxxx wrote:

> I actually like the idea of taking any map grid that one can view
> as having concentric rings (emanating from a pole). If you take two
> of these and stick them back to back together along the equator you
> get pretty much the model you describe below. Works for square, hex
> and many other tile shapes.

No, it doesn't work for hexagons.  It will only work for triangles and 
squares because only these have an even number of tiles meeting at each 
corner.  And for triangles it would really suck.

Consider
    _______
   /G     H\
  /         \
/L         I\_______
\           /?     ?\
  \         /         \
   \K_____J/?         ?\
   /A     B\           /
  /         \         /
/F         C\?_____?/
\           /
  \         /
   \E_____D/

where ABCDEF and GHIJKL are the two hexagons you are putting 
back-to-back.  If you're going to tile the map, what values are you 
going to put in the ? places above?  Answer: none are possible.

Note that if you do this with a square you'll get a quincuncial-2 topology.

jason