[Freeciv-Dev] Re: Tech cost patch v7

[Juha Litola <slave@xxxxxxxxxxxx>]

On Fri, Nov 30, 2001 at 12:13:36PM +0100, Raimar Falke wrote:

> num_req_techs() can be removed. The code should go into
Okay, I'll zap it.

> precalc_tech_data. IMHO
> +  if(counted[tech])
> +    return 0;
> should be
> +  if(counted[tech])
> +    return advances[tech].num_reqs

No, it would go wrong then. Imagine tech tree like below.

        tech a
    |            |
  tech b      tech c
       |      |
        tech d

Where tech a is requirement for tech b and so on.
Currently num_tech_reqs return 4 for tech d. If I'd implement your
change, it would give 5, as tech a will be counted twice. That will
leak to highly inconsistent costs in techs that have common requirements.

I'll send fixed patch in the evening, don't want to flood maillist
if I get more comments.

--
// Juha Litola

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