Path: chuka.playstation.co.uk!scea!peter_alau@playstation.sony.com From: "Charles Nicholson" Newsgroups: scee.yaroze.programming.3d_graphics Subject: Re: Normal Vector Directon Date: Sun, 7 Feb 1999 11:12:43 -0500 Organization: SCEA News Server Lines: 14 Message-ID: <79kdd4$2ed3@scea> References: <01be51d4$857b00a0$LocalHost@default> NNTP-Posting-Host: chnicholson.vassar.edu X-Newsreader: Microsoft Outlook Express 4.72.3155.0 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 Organizing the points in your triangles so that they go clockwise "tells" the renderer which side is facing out. In your case, the normal would simply be { 0,0,ONE }, because it is, in fact, poking your eye. hope i helped -charles >If you were facing a triangular polygon with the points defined in a >clockwise direction, would the normal be pointing away from you, or >pointing towards you and poking in your eye? > >Jon