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Article #1169

Re: Y positive up or down?

#1169
From: Guido van Rossum
Date: Sat, 08 Nov 1986 13:10
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In article <1903@adobe.UUCP> greid@adobe.UUCP (Glenn Reid) writes:
>It seems feasible to make this configurable--that is, have
>the coordinate system default one way, but make it possible to change it.
>The only problem I can see with this is in transferring documents.  It would
>probably be best to always save documents in one form, and allow on-the-fly
>inversion as they are being edited, rather than storing them both ways.

This is easily remedied by putting the coordinate system used somewhere
in the document, maybe in a descriptive header or something, just like a
Unix plot(1,3,5) file has to start with a "space" command if it wants to
be device-independent.

Actually, if you let the user choose a coordinate system, the whole
question almost becomes a non-issue, or at least many of the arguments
in favour of either choice lose their importance.  Surely I want to be
able to use coordinates in centimeters, not pixels; so why not let me
decide where to put the origin?  (As for me, I would put the origin in
the center of the screen.)

	Guido van Rossum, CWI, Amsterdam <guido@mcvax.uucp>
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Message-ID: <7133@boring.mcvax.UUCP>
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!mcvax!guido
References: <479@vaxb.calgary.UUCP> <1903@adobe.UUCP>

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!mcvax!guido
From: guido@mcvax.uucp (Guido van Rossum)
Newsgroups: net.text,net.cog-eng
Subject: Re: Y positive up or down?
Message-ID: <7133@boring.mcvax.UUCP>
Date: Sat, 8-Nov-86 08:10:56 EST
Article-I.D.: boring.7133
Posted: Sat Nov  8 08:10:56 1986
Date-Received: Sun, 9-Nov-86 04:15:11 EST
References: <479@vaxb.calgary.UUCP> <1903@adobe.UUCP>
Reply-To: guido@boring.uucp (Guido van Rossum)
Organization: "Stamp Out BASIC" Committee, CWI, Amsterdam
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Apparently-To: rnews@mcvax