[Freeciv-Dev] Re: (PR#12946) FACTOR in consider_settler_action

["Brian Dunstan" <bdunstan149@xxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=12946 >


--- Benoit Hudson <bh@xxxxxxxxxxxxxxxxxxx> wrote:
> 
> <URL:
> http://bugs.freeciv.org/Ticket/Display.html?id=12946
> >
> 
> On Sun, May 01, 2005 at 04:10:42AM -0700, Benedict
> Adamson wrote:
> > Those multipliers are used so we can use integer
> arithmetic, which in 
> > turn is done because integer arithmetic is faster
> than floating-point 
> > arithmetic (right?). But it introduces bugs like
> this (I have a vague 
> > recollection of similar bugs previously). But is
> this 'optimisation' 
> > really worthwhile? Is the performance gain large
> enough to justify the 
> > decreased reliability? I would not be surprised if
> the gain were small.
> 
> There's more than one reason to be wary of floating
> point, such as:
>         1e-8 != (1.0 + 1e-8) - 1.0
> Also, Intel boxes have different floating-point
> (80-bit inside the FPU,
> 64-bit in memory) than the rest of the world (64-bit
> everywhere), which
> means that client and server may disagree on certain
> things if they run
> on different platforms.
> 
> But generally I agree that floating point should be
> used more often.
> 
>         -- Beno�t

I wonder if maybe we should decide on a common way of
handling numerical issues, and include that in
CodingStyle?

In particular, I think a standard unit of economic
value would be a good thing for freeciv.


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