To:	ao950 AT FreeNet DOT Carleton DOT CA
Cc:	djgpp AT delorie DOT com
Subject:	Re: Allegro perspective-correct texture mapping
Message-ID:	<19970317.171229.7391.2.fwec@juno.com>
References:	<5fg3s0$hob$1 AT troll DOT powertech DOT no> <331F047A DOT 271F AT cam DOT org>
From:	fwec AT juno DOT com (Mark T Logan)
Date:	Mon, 17 Mar 1997 17:14:19 EST

On 16 Mar 1997 11:38:01 GMT ao950 AT FreeNet DOT Carleton DOT CA (Paul Derbyshire)
writes:
>
>The heretic engine is clearly not the same as that in DOOM. For 
>instance
>look at the difference in HOM effects if you go off the map. (DOOM:
>IDSPISPOPD. DOOM II, same engine: IDCLIP. Heretic: KITTY. Type the
>appropriate code and walk through a wall.)
>
>Doom's HOM effect flickers between three images because it uses a Mode 
>X
>triple buffer. (The game I'm writing also does and I have gotten HOMs
>almost exactly like DOOM HOMs as a result of bugs in the background
>routines that cause parts of the previous frame to persist.)

IMHO, what you are talking about here is not a difference in engines, but

different video code.  As far as I know, Id liscensed the doom engine to
3rd parties just like it liscensed the wolf 3d engine to Blake Stone:
Aliens
of Gold and countless other clones.  If the method used to draw to the
screen was changed, I hardly think that constitutes a whole new engine.


||                                         Fwec AT juno DOT com
|| "nonono.  It's not a bug, because you can deal with it" - My C++
instructor
||
|| Yeah, well I can deal with win 3.11 crashing every 3 hours or so, but
its still a
||  bug.

- Raw text -