[comp.graphics] 3d Rotation Algorithms

stolfi@jumbo.dec.com (Jorge Stolfi) (06/23/88)

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