Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!ames!husc6!encore!cloud9!cme
From: cme@cloud9.Stratus.COM (Carl Ellison)
Newsgroups: comp.graphics
Subject: Re: 3D Rotations/Instancing
Message-ID: <3456@cloud9.Stratus.COM>
Date: 27 Jan 89 16:19:00 GMT
References: <65@sdcc10.ucsd.EDU> <5909@leadsv.UUCP>
Distribution: usa
Organization: Stratus Computer, Inc., Marlboro, MA
Lines: 8

In article <5909@leadsv.UUCP>, kallaus@leadsv.UUCP (Jerry Kallaus) writes:
> 
> Rotation matrices are orthonormal matrices which have the property
> that they are their own inverse.

Almost.

Their TRANSPOSE is their inverse.