Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!sics.se!fuug!news.funet.fi!cc.tut.fi!jk87377
From: jk87377@cc.tut.fi (Juhana Kouhia)
Newsgroups: comp.graphics
Subject: Re: intersecting planes and spheres
Message-ID: <1991May25.180220.27997@cc.tut.fi>
Date: 25 May 91 18:02:20 GMT
References: <1991May23.205708.9746@hellgate.utah.edu>
Organization: Tampere University of Technology
Lines: 23


In article <1991May23.205708.9746@hellgate.utah.edu>
mblum%asylum.utah.edu@cs.utah.edu (Michael Blum) writes:
>
>Actually, I need to know whether a sphere intersects a cube, and
>if so which side of the cube.

(I will e-mail this to you as you requested...)
If I understand your problem right, you should look for the paper

  Eric Haines and John Wallace
  Shaft Culling for Efficient Ray-Traced Radiosity
  May 1991
  Presented in Second Eurographics Workshop on Rendering, Barcelona

See section Shaft Cull Testing, and sphere/box test.

Paper is in nic.funet.fi, pub/graphics/papers^2/hain91.ps.Z;
and hopefully soon in weedeater.math.yale.edu; pub/Papers (Mr. Kolb
is in Europe now and are not available).

Juhana Kouhia

PS. What is the definition for the "computer graphics professional"?