X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
Mime-Version:	1.0 (Apple Message framework v1085)
Subject:	Re: [geda-user] libgeda circle parsing
From:	John Doty <jpd AT noqsi DOT com>
In-Reply-To:	<20130117144225.30d2507f@svelte>
Date:	Thu, 17 Jan 2013 16:35:06 -0700
Message-Id:	<1DCD2904-101A-4EDF-A5F5-4B137ACD71E8@noqsi.com>
References:	<CAFfN_23UzAVVk0-TSZyVZihFmq1-0v0gpB7o4uxe3KgxDFDG0w AT mail DOT gmail DOT com> <57B44348-7A53-4743-8A60-7C9D31EFD1ED AT noqsi DOT com> <CAFfN_22hFE7AtMCXLvT-Up6ZxF=TZ7eYmr+PO5YbeFy7OU7Q0A AT mail DOT gmail DOT com> <20130117144225 DOT 30d2507f AT svelte>
To:	geda-user AT delorie DOT com
X-Mailer:	Apple Mail (2.1085)
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id r0HNZDPb024126
Reply-To:	geda-user AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	geda-user AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

On Jan 17, 2013, at 3:42 PM, Colin D Bennett wrote:

> On Wed, 16 Jan 2013 20:24:44 -0200
> Antonio Todo Bom ✈ <atodobom AT gmail DOT com> wrote:
> 
>> Nothing special.
>> Just think that if a function analyzes whether an angle is zero or
>> negative, as if this was an error. So should not leave yet as
>> error. Alternatively, changes to analyze only if is negative.
>> 
>> 
>> Well, for consistency a zero radius circle should render as a
>> point at
>>> display resolution, since for larger radii it renders as a
>>> curve at display resolution. [snip]
>>> 
>> 
>> Looking from this point of view. I think it is really interesting
>> to tolerate circles with radius zero.
> 
> Maybe a cleaner way would be to add a new geometric entity, the
> 'point'.  Then we can require, and subsequently assume, that
> circles have a radius greater than zero.  Which is what geometry
> demands.

I disagree. Zero is a perfectly respectable radius for a circle to have. And as I've noted before, other objects of zero size can be handy.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com

- Raw text -