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From: jsp@cs.ed.ac.uk (John Spackman)
Newsgroups: comp.windows.x,comp.graphics
Subject: Re: 3d rotation in room coords?
Message-ID: <7294@skye.cs.ed.ac.uk>
Date: 7 Mar 91 09:37:03 GMT
References: <9103050342.AA20065@maui.coral.com> <13709@life.ai.mit.edu> <13781@life.ai.mit.edu>
Sender: nnews@cs.ed.ac.uk
Reply-To: jsp@lfcs.ed.ac.uk (John Spackman)
Organization: Laboratory for the Foundations of Computer Science, Edinburgh U
Lines: 20

>|> Think of viewing the object from the surface of a sphere. Your eye
>|> point can be specified by 2 co-ordinates (you can think of them
>|> as latitude and longitude). Have your mouse motion map to these
>|> co-ordinates ...
>
>I have since been informed that Apple may have a patent pending on 
>using this technique. I believe that this technique is NOT new, and
>it could be classified as common knowledge amongst people in the 
>graphics community.
>

This technique is certainly not new.  It has been a feature available for
specifying views in Prime's MEDUSA CAD/CAM package for some years & was the
technique I used myself for post-graduate work over four years ago.

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