Newsgroups: comp.human-factors
Path: utzoo!utgpu!watserv1!watcgl!watcgl!bmacinty
From: bmacinty@mud.uwaterloo.ca (Blair MacIntyre)
Subject: Re: Eye Movement Trackers
In-Reply-To: rpotter@grip.cis.upenn.edu's message of 17 Jun 91 00: 55:08 GMT
Message-ID: <1991Jun17.035741.7670@watcgl.waterloo.edu>
Sender: news@watcgl.waterloo.edu (USENET News System)
Organization: University of Waterloo
References: <91Jun14.160659edt.6227@neat.cs.toronto.edu>
	<44733@netnews.upenn.edu>
Date: Mon, 17 Jun 1991 03:57:41 GMT
Lines: 19

>>>>> rpotter@grip.cis.upenn.edu (Robert Potter) wrote:

Robert> In article <91Jun14.160659edt.6227@neat.cs.toronto.edu>,
Robert> mgreen@cs.toronto.edu (Marc Green) writes:
>... there is a big difference between knowing the position of the eye
>and the locus of gaze.

Robert> Huh?  How can the locus of gaze move independantly of the eyeballs?

Perhaps he's thinking of the position (xyz) of the eyeballs vs. the
position and orientation (xyzpyr) (thats pitch/yaw/roll) of the
eyeballs.

No, I can't picture the locus of gaze moving independantly of the
eyeballs, but I can think of when it may come in handy!
--
Blair MacIntyre, Computer Graphics Lab
Dept. of Computer Science, University of Waterloo, Waterloo, ON, Canada, N2L3G1
{bmacintyre@{watcgl|violet|watdragon}}.{waterloo.edu|uwaterloo.ca}