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Date:	Mon, 14 Sep 2015 23:04:29 +0200
From:	"Peter Stuge (peter AT stuge DOT se) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Subject:	Re: [geda-user] Apollon
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John Doty wrote:
> > I disagree very strongly with floating point, but using a fixed-size
> > decimal is an important improvement!
> 
> The trouble is that common computer numerics do not actually obey the
> same rules as mathematical numbers.

Nod.


> Rational numbers fix these problems.
..
> For rendering on a grid, use fixed or floating point. The rationals
> that fall on your grid are a set of measure zero, anyway.

Output (rendering on grid) is one issue, and is easy enough to deal
with in isolation.

But input (rotate by 60 degrees) is another issue, and less easy to
handle, because it's very important for usability that user
input->output and vice versa is also closed.

Fun!


//Peter

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