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MathGroup Archive 2000

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Re: point inside torus

  • To: mathgroup at
  • Subject: [mg25291] Re: point inside torus
  • From: Jens-Peer Kuska <kuska at>
  • Date: Tue, 19 Sep 2000 03:45:14 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <8q22ao$>
  • Sender: owner-wri-mathgroup at


ist this a question ? an answer ? or what.

Any way, it is the most long winded way to test

the sign of

(x^2+y^2+z^2-(a^2+b^2))^2-4 a b (b^2-z^2)

if the point is {x,y,z} and the minor radius
of the torus is b, and the major radius a.

It is still the question "How can we make
this test more clumsy and even slower ?"


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