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From: dodson@convex.COM (Dave Dodson)
Newsgroups: comp.sources.wanted,sci.math
Subject: Re: Inverse of 4x4 Matrix
Message-ID: <104594@convex.convex.com>
Date: 3 Aug 90 13:26:15 GMT
References: <1990Aug3.021200.21023@oswego.Oswego.EDU>
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Organization: Convex Computer Corporation; Richardson, TX
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In article <1990Aug3.021200.21023@oswego.Oswego.EDU> cs-ind04@penelope.Oswego.EDU (Jason E. Forbes) writes:
>Before I reinvent the wheel, does anyone have a C function that can
>find the inverse of a 4 by 4 matrix?

First, I would ask why you want to invert a matrix.  While papers and books
extensively use the notation A-inverse * b to denote the solution of the
system of linear equations Ax = b, it is better to solve the system directly
than to compute the inverse and multiply it times the right hand side.  
By _better_, I mean faster and more accurate.  So if you are wanting to
solve linear equations, do it directly.

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Dave Dodson		                             dodson@convex.COM
Convex Computer Corporation      Richardson, Texas      (214) 497-4234