Path: chuka.playstation.co.uk!news
From: alex@teeth.demon.co.uk (Alex Amsel)
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: Are normals required for flat shaded polygons?
Date: Thu, 16 Oct 1997 17:22:56 GMT
Organization: Into Beyond
Lines: 24
Message-ID: <34494d34.15941975@news.playstation.co.uk>
References: <34456B0C.3DE50A6B@ibm.net>
Reply-To: alex@teeth.demon.co.uk
NNTP-Posting-Host: teeth.demon.co.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Newsreader: Forte Agent .99g/32.335

On Thu, 16 Oct 1997 14:17:00 +1300, James Russell <jruss@ibm.net> did
quoth at me:

>I'm building an RSD file from scratch since my objects are simple and my
>object creation utils keep doing crap triangulation on them.
>
>I want most of the polygons to be flat shaded (no gouraud). Do I have to
>specify real normals for these polygons, even though they don't have
>lightsource calculations?

If you want to do any lighting you'll need normals, one per face. If
you don't want lighting you will still need a 'dummy' normal for the
normal index to refer to as the ps-x will expect it to be there and
god knows what it'll do otherwise.


Regards, 

Alex Amsel

+ Tuna Technologies + Telephone & Fax +44 (0)114 221 0686 +
+ For all your Win95/NT/Console Game and Tool Development +
+ And we say, "A good programmer always blames Microsoft" +
+ "Just say NO to Big Fat Ron", say I to Sir Jack Hayward +