Xref: utzoo comp.sources.wanted:17305 comp.graphics:18911
Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!nstn.ns.ca!news.cs.indiana.edu!sdd.hp.com!samsung!uunet!cbmvax!chrisg
From: chrisg@cbmvax.commodore.com (Chris Green)
Newsgroups: comp.sources.wanted,comp.graphics
Subject: Re: Ray tracing
Message-ID: <22788@cbmvax.commodore.com>
Date: 28 Jun 91 20:00:30 GMT
References: <383@bibsyst.UUCP> <1991Jun27.184538.6963@ux1.cso.uiuc.edu> <1991Jun28.095138.3617@cc.tut.fi>
Reply-To: chrisg@cbmvax.commodore.com (Chris Green)
Organization: Commodore, West Chester, PA
Lines: 17

In article <1991Jun28.095138.3617@cc.tut.fi> jk87377@cc.tut.fi (Juhana Kouhia) writes:
>
>In article <1991Jun27.184538.6963@ux1.cso.uiuc.edu> tmkk@uiuc.edu (K. Khan) writes:
>>
>>Here's a wild guess: check the focal length parameter in your projection
>>formulas. Too short a focal length value will give a fish eye lens look
>>to the scene, and cause the distortions you describe.
>
	Here's a wilder guess: You're not basing your ray directions on (shudder)
ANGLES, are you?
-- 
*-------------------------------------------*---------------------------*
|Chris Green - Graphics Software Engineer   - chrisg@commodore.COM      f
|                  Commodore-Amiga          - uunet!cbmvax!chrisg       n
|My opinions are my own, and do not         - killyouridolssonicdeath   o
|necessarily represent those of my employer.- itstheendoftheworld       r
*-------------------------------------------*---------------------------d