[Freeciv-Dev] Re: (PR#3936) introducing native coordinates

[Ross Wetmore <rwetmore@xxxxxxxxxxxx>]

Raimar Falke wrote:
> On Sat, Apr 12, 2003 at 08:24:06AM +0200, Raimar Falke wrote:
>
> > > but square_iterate and other local functions cannot be implemented
> > > in these coordinates
> > Why not? In the worst case I calculate all the vectors by
> > hand and hardcode them. Something like:
>
> Actually there is a "portable" way to do square_iterate: using
> MAPSTEP.
>
> At the start you go radius times NW.
>
> At the body you do a STEP W. This radius times. Than a STEP S. Than
> radius steps E and so on.
>
>         Raimar
Doesn't work on a true isometric map. A square figure oriented along
the natural isometric axes is not a constant distance from the centre.

In isometric land the prescription is go W then NE radius steps ...
This is just the map coordinate square rotated.

Besides, this complicates MAPSTEP with global topology stuff when it
is really just a local operation. Mixing things up is never going to
simplify life.

Try again ... :-)

Cheers,
RossW
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