Path: utzoo!attcan!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!haven!uvaarpa!virginia!bimbo!boyter
From: boyter@bimbo.UUCP (Maj Brian Boyter)
Newsgroups: comp.sources.wanted
Subject: Re: WANTED: 3-D linear interpolation
Summary: Foley & VanDam Sec 8.5
Message-ID: <377@bimbo.UUCP>
Date: 9 Oct 88 16:59:38 GMT
References: <10600017@bradley>
Organization: Boyter Control, Charlottesville, Va
Lines: 29

In article <10600017@bradley>, john@bradley.UUCP writes:
> 
> 	software in C or Fortran to do 3-D linear interpolation
> 	(or something like this...)
> 

I think you can find what you want in
Foley & VanDam, Fundamentals of Interactive Computer Graphics.
In my 1982 version, it's on page 295.

Basically, if you have 2 points P1 and P2,
you can express x, y, and z as functions of t;
if t=0, then (x,y,z) are the coordinates of P1;
if t=1, then (x,y,z) are the coordinates of P2.
As t varies from -inf to +inf you get a linear interpolation.

Hope this helps...

-- 
---------------------------------------------------------------
   Maj. Brian A Boyter
   US Army Foreign Science & Technology Center
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