Re: 3d programming

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#47

From: Jon Leech
Date: Wed, 14 Feb 1996 22:24

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In article <4fpm5c$me1@odin.diku.dk>, Niels Ull Jacobsen <null@diku.dk> wrote:
>Actually, a plane can always be represented by just 3 numbers.
>
>The representation Ax+By+Cz=1 works in all but the special case where
>the plane contains the point (0,0,0). In this case, the plane can be
>represented as Ax+By+Cz=0 (with an extra degree of freedom).

    Both cases appear to contain 4 numbers - unless '1' and '0'
are no longer numbers.
    Pedantically,
    Jon
    __@/

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Path: arc1-ca.pugleaf.net!ashe.cs.unc.edu!not-for-mail
From: leech@cs.unc.edu (Jon Leech)
Newsgroups: comp.lang.pascal.borland,comp.lang.pascal.mac,comp.lang.pascal.ansi-iso,comp.lang.pascal.misc,comp.sys.amiga.programmer,comp.graphics.algorithms,comp.os.ms-windows.programmer.graphics,comp.sys.amiga.graphics
Subject: Re: 3d programming
Date: 14 Feb 1996 17:24:53 -0500
Organization: The University of North Carolina at Chapel Hill
Message-ID: <4ftnfl$p3r@watt.cs.unc.edu>
References: <4f3od9$2jg@zeus.tcp.co.uk> <311F9C84.3B26@structure.chimie.usherb.ca> <4fo5o4$2sh@fulton.cs.unc.edu> <4fpm5c$me1@odin.diku.dk>
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