Path: chuka.playstation.co.uk!news
From: "Jon Prestidge (alias Moose)" <zmoose@premier.co.uk>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: TMD Normals
Date: 23 Jun 1997 16:31:39 GMT
Organization: PlayStation Net Yaroze (SCEE)
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Can someone explain how normals are defined for the simple TMD primitives
F_3 and F_4?     I understand the concept of normals OK, but what
measurements are used e.g.:
    ....is the normal defined as an imaginary x,y,z  point that the normal
line is projected to from the centre of the polygon's surface? 
    ...or is it an angle that one of the vertices of the polygon is rotated
by, to form a normal line?  If so, which vertex does it relate to?
    ....or other??

... please also include typical values so that I'll know if I'm thinking
along the same lines.

Cheers in advance if anyone can help,

Jon