Re: Sphere Construction

From: William Elliot (marsh_at_privacy.net)
Date: 09/12/04 

Date: Sun, 12 Sep 2004 07:08:00 -0700

On Sun, 12 Sep 2004, Peni wrote:

> Could someone please tell me how can I construct a sphere based on a
> system of coordinates?
>
A sphere of radius r centered at (0,0,0) is all the points (x,y,z) with
        x^2 + y^2 + z^2 = r^2.

If you want the sphere to be solid like a ball, then the points with
        x^2 + y^2 + z^2 <= r^2.

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