Path: chuka.playstation.co.uk!news
From: alex@teeth.demon.co.uk (Alex Amsel)
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: GsLinkObject4
Date: Sun, 20 Jul 1997 20:09:25 GMT
Organization: Into Beyond
Lines: 30
Message-ID: <33d35f00.865509@news.playstation.co.uk>
References: <01bc8934$31d86060$LocalHost@default> <33C10AA2.4609@interactive.sony.com>
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 Mon, 07 Jul 1997 16:26:27 +0100, Developer Support
<dev_support@interactive.sony.com> did quoth at me:


>If you look at pre-calculated TMD's the number of primatives replaces
>the
>ilen and olen of the first primative of a type. I'm not sure what this
>is
>for, and we have no documentation about it. I wouldn't worry about it, 
>we've been playing about with TMD's at run time for nearly a year, and
>have 
>had no problems.

The reason is as follows:

ilen and olen get replaced with the number of primitives of that type
that follow sequentially. The 'mode' remains the same therefore the
system can use a look up table to find the primitive size. Then
instead of testing ilen and olen each time it can use prestored data
within a loop for however many identical primitives there are in that
run.


Regards, 

Alex Amsel

+ Tuna Technologies + Windows 95/NT, Console and Internet +
+ The PC/PS-X Game Tools and Game Development Specialists +
+ Iwan Roberts, Norwich is a great place, please go! WWFC +