[Freeciv-Dev] Re: e: suggestion/idea - the world is round

[Jules Bean <jules@xxxxxxxxxxxxxxx>]

On Fri, Jul 21, 2000 at 01:17:11PM +0200, Marc Strous wrote:
> >But they can't, at the corner of the cube, where there is a point
> >which only borders three grids, not four, making these 8 points
> >totally different from any other on the cube.
> >
> >Jules
> 
> the 3D representation is not an exact, geometric cube. In fact, assembling 
> the projections in 3D space would yield an impossible object.
> The six projections are just aligned in a cube shape. the "top" projection 
> "overhangs" (and thus overlaps) all "side" projections, so there are no 
> special tiles (cornerpoints) required. But on the 2D map, you don't notice 
> the impossibility of the object in 3D space. Even a 3D approximation of the 
> object, that might be supplied to the player for navigational purposes, 
> would not expose this trickery. It should be too small to expose the 
> (impossible) details.

Hmm.  I don't follow.

Suppose the top projection is like this:


+--+------+--+
|F |  D   | G|
|  |      |  |
+--+------+--+
|  |      |  |
|  |      |  |
|B |  A   | C|
|  |      |  |
|  |      |  |
+--+------+--+
|  |      |  |
|H |  E   | I|
+--+------+--+

Then area 'A' is /only/ part of the top project -- fine.
Area 'B' overlaps with the left projection, fine.
Area 'D' overlaps with the "behind" projection, fine.

But what about area F?

Jules