Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!decwrl!ucbvax!unisoft!mtxinu!taniwha!paul
From: paul@taniwha.UUCP (Paul Campbell)
Newsgroups: comp.graphics
Subject: Another Graphics Gems bug ....
Message-ID: <643@taniwha.UUCP>
Date: 11 Sep 90 20:00:23 GMT
Organization: Taniwha Systems Design, Oakland CA
Lines: 31

I typed in the matrix inversion code from Graphics Gems today (page 766)
and spend a while banging my head against a wall trying to find out why
it didn't work. Turns out there is a tiny typo - it calculates:

	 -1	         1
	A	= -------------- adjoint A
		  det adjoint A

instead of:

	 -1	    1
	A	= ----- adjoint A
		  det A

To fix it change the line on page 766:

	det = det4x4(out);

to:

	det = det4x4(in);



	Paul

-- 
Paul Campbell    UUCP: ..!mtxinu!taniwha!paul     AppleLink: CAMPBELL.P
What most people don't realize is that those plastic cover slips that your 3
inch floppies come in are actually condoms for protecting your computer from
harmfull computer viruses - practice safe computing ..... :-)