Path: utzoo!utgpu!water!watmath!clyde!rutgers!sdcsvax!ucsdhub!hp-sdd!hplabs!hpda!hpdslab!hpiacla!scott
From: scott@hpiacla.HP.COM (Scott Anderson)
Newsgroups: comp.graphics
Subject: Re: Re: Interactive Stereo Viewing
Message-ID: <4570004@hpiacla.HP.COM>
Date: 19 Jan 88 03:43:37 GMT
References: <146@rocky8.rockefeller.edu>
Organization: Hewlett Packard
Lines: 12

Actually, the number of degrees is dependent upon how far your object is
supposed to be from the viewer.  The number of degrees can be found by
taking the inverse tangent of ( 1/2 the distance between your eyes divided by
the distance to the object).  For example, to view an object that should
be a foot away take the arctangent of (2.6 / 2 / 12), which is the arctangent
of ~0.1, which is 6.2 degrees.  Some people like to make the angle larger,
in order to heighten the effect.  By the way, I haven't done any vast
sampling to get 2.6 inches as the distance between the average human's eyes;
I just grabbed a ruler and looked in a mirror.

	Scott Anderson
	hplabs!hpiacla!scott