From: ovek AT arcticnet DOT no (Ove Kaaven)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: fwd: Re: ellipses at an angle
Date: Tue, 04 Feb 1997 10:59:51 GMT
Organization: Vplan Programvare AS
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Message-ID: <5d87i3$7cj$1@troll.powertech.no>
References: <199702041509 DOT KAA00551 AT delorie DOT com>
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To: djgpp AT delorie DOT com
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MTEEL DOT DTECHS AT dtechs DOT com (Mark Teel) wrote:

>I would assume you want your algorithms to be accurate, thus the equation. 
>Shapes can sometimes be represented exactly by mathematical equations, and
>should be when possible. And I don't think Word Processors have bupkus to do
>with an ellipse.
>One should be rigorous when one can.  Your first definition was inaccurate,
>period. (BTW, I make a living designing algorithms, math was just my first
>love).

Maybe you're too much into analytic geometry. If you replace the 1
with any constant value, his first definition is exact. Not quite
suitable for any computer algorithm, true, but still
mathematically/geometrically exact.