Path: utzoo!utgpu!water!watmath!clyde!att!pacbell!ames!pasteur!ucbvax!decwrl!jumbo!stolfi
From: stolfi@jumbo.dec.com (Jorge Stolfi)
Newsgroups: comp.graphics
Subject: Re: 3d Rotation Algorithms
Summary: Reference on projective geometry
Message-ID: <13123@jumbo.dec.com>
Date: 23 Jun 88 10:25:42 GMT
References: <350001@hpcvlx.HP.COM> <2833@umd5.umd.edu>
Reply-To: stolfi@src.dec.com (Jorge Stolfi)
Followup-To: comp.graphics
Organization: DEC Systems Research Center, Palo Alto
Lines: 19

Brett S Bourbin asks:
>
>   I want to write a program to show a perspective point-of-view
>   of some scene.  Can anyone tell me the formulas ...

Benjamin Ellsworth asks:
>   
>   I'm looking the ratio (or angle) at which things "shrink" as
>   they get farther away.  

Look for books on projective geometry and homogeneous coordinates.
Try for example

  A. Penna and R. Patterson
  Projective geometry and its applications to computer graphics
  Prentice-Hall (1986)
  
                Jorge Stolfi
                stolfi@src.dec.com, ...!decwrl!stolfi