Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!dptcdc!tmsoft!masnet!canremote!alan.kennedy
From: alan.kennedy@canremote.uucp (ALAN KENNEDY)
Newsgroups: comp.graphics
Subject: Re: How did Alliant do this i
Message-ID: <89071720415582@masnet.uucp>
Date: 16 Jul 89 23:15:00 GMT
Organization: Canada Remote Systems Limited, Mississauga, ON, Canada
Lines: 20

In response to your question... "How did they do this", I can explain 
how I built my mountain. I didn't see the item that you are referring 
to. 
Several months back, my company built an exact duplicate of Mt. 
MacDonald for CP Rail. They were making a video of how they built the new
tunnel through it, and needed a lot of 3D animation to explain how it 
was done.
Luckily, they had a scale model made for the architects, so we were able
to use that as reference. The data itself was inputed using a 3D 
digitizer. This is like a normal digitizing pad, except it has a Z axis.
Thus the wand can be moved around in 3D space instead of a 2D tablet.
The model was carefully marked into triangulated segments, and the 
points of these triangles were input into the computer...
To be honest... if we did it again, I'd rather build a real mountain. It
would have to be easier.

Hope this helps!
Alan Kennedy
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