From:	bas AT merlin DOT ebicom DOT net
Message-Id:	<2.2.32.19970320185129.007398c0@merlin.ebicom.net>
Mime-Version:	1.0
Date:	Thu, 20 Mar 1997 18:51:29 +0000
To:	djgpp AT delorie DOT com
Subject:	Re: Allegro perspective-correct texture mapping

At 08:02 PM 3/20/97 GMT, you wrote:
>You lie.  I had a copy of the source code for Doom.  It does use
>raytracing. 
>-- 
>
>::-)
>
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>Josh McDonald <os-dev AT effect DOT net DOT au> wrote in article
><01bc2ff7$739c9340$14621ecb AT homer DOT effect DOT net DOT au>...
>> > Games like DOOM or DUKE3D don't use polygons and textures.They use
>> > raytracer engines. If you are talking about Quake, it 'cheats' in the
>> > way it maps textures.It combines affine with perspective correct or
>> > somthin like that.Like it's doing a correction only every 16 pixels.
>The
>> > result is a faster texture mapper but still 'perspective correct' for
>> > the human eye & mind. 
>> 
>> HAHAHAHAHAHAHAHAA ROTFL...... How can we tell _everybody_ the truth
>> about doom so we don't get these messages anymore?
>> 
>> Doom does _not_ use raycasting, or raytracing. It draws polygons, which
>are
>> sorted
>> through a bsp. Sheesh..
>> 
>> -Josh
>> 
>
>
Umm, didnt you see a previous posting where John Carmack himself said it
used BSP not ray tracing.  I belive he would know :)


Bob Sayers
http://www2.ebicom.net/~bas/

"The speed of light sucks" -John Carmack

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