[Freeciv-Dev] Re: (PR#2370) Path finding

[Gregory Berkolaiko <Gregory.Berkolaiko@xxxxxxxxxxxx>]

Quoting Raimar Falke <rf13@xxxxxxxxxxxxxxxxx>:

> On Sun, Feb 23, 2003 at 10:24:55AM -0600, Mike Kaufman wrote:
> > On Sun, Feb 23, 2003 at 05:01:48PM +0100, Raimar Falke wrote:
> > > On Sun, Feb 23, 2003 at 08:25:16AM -0500, Ross Wetmore wrote:
> > > > I suspect that there is a bit more explaining to do about EC.
> > > > 
> > > > Some user scenario type explanations would probably help the
> > > > unwashed understand the mysteries of EC and why any unsigned
> > > > number is magically an EC or what this actually does to PF.
> > > > 
> > > > Frankly, it appears totally useless and should be removed, at
> > > > least from any basic pf operation. It can be added back in a
> > > > specialized callback that understands and has some use for it.
> > > > But wasting scarce warmap cycles creating, manipulating and
> > > > storing/copying EC values around that have no function in the
> > > > general case is not particularly wise.
> > > 
> > > find_a_direction has to be emulated. EC is the solution. EC will also
> > > help on other tasks to prefer a certain path. Examples are path with
> > > the minimal number of steps or the path with the most tiles uncovered.
> > 
> > yes, yes, Ross---being more wordy that I can bring myself to be---says it
> > perfectly. So ok, Raimar you tell me 'what' it's for (even should it's
> > something as opaque as "find_a_direction has to be emulated"), but you
> don't 
> > say how it does so, and this needs to go in path_finding.h
> 
> IMHO it is written in path_finding.h how it is done. Not written there
> is why is it done (see above) and is example.
> 
> Gregory: how can we explain it?

An attempted explanation is attached.

G.

pf_doc.txt
Description: Text document