Re: Perspective

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#31

From: Jean Favre
Date: Thu, 31 Dec 1992 16:01

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In article <1hsp6vINNql6@fido.asd.sgi.com> kurt@cashew.asd.sgi.com (Kurt Akeley) writes:
>-- 
>
>I believe this is how the perspective matrix is computed:
>
>	cot(fov/2)
>	----------	0	0	0
>	 aspect
>
>
>	    0	    cot(fov/2)	0	0
>
> [stuff deleted...]

Shouldn't this be "cot(fov/20)", since the fov is given in tenths of degrees?
Page C-4 of the Graphics Library Programming Guide shows the same matrix
Kurt Akeley typed in, except for this typographic error.

I'm just trying to help.
Good luck.

-- 
Jean M. Favre. EE&CS Dept. The George Washington University
		(202) 994 5917
		favre@seas.gwu.edu

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Newsgroups: comp.sys.sgi.graphics
Path: arc1-ca.pugleaf.net!sparky!uunet!seas.gwu.edu!favre
From: favre@seas.gwu.edu (Jean Favre)
Subject: Re: Perspective
Message-ID: <1992Dec31.160144.2910@seas.gwu.edu>
Organization: George Washington University
References: <C01sFL.3q1@world.std.com> <1hsp6vINNql6@fido.asd.sgi.com>
Date: Thu, 31 Dec 1992 16:01:44 GMT
Lines: 25

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