Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!sjm
From: sjm@cs.purdue.EDU (Scott J Mark)
Newsgroups: comp.graphics
Subject: Point within cylinder problem
Message-ID: <7967@medusa.cs.purdue.edu>
Date: 14 Sep 89 15:15:47 GMT
Reply-To: sjm@medusa.cs.purdue.edu (Scott J Mark)
Organization: Department of Computer Science, Purdue University
Lines: 16


	It's formula time, again.  Is there any cheap way of determining
if a point in 3-space is within a cylinder?  I have the endpoints of the
central line, and the radius of the cylinder.

	Even more helpful would be something that would determine if a
point is within a cylinder with a hemisphere at each end.  This can be
done by checking the point against a spere at each endpoint, but if
there is a way to get this "free" I'd prefer it.

	In other words, I need to determine if a point is within a
certain distance of a line segment.  

						Scott Mark
-- 
sjm@cs.purdue.edu