Path: utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!rpi!masscomp!calvin!mark
From: mark@calvin..westford.ccur.com (Mark Thompson)
Newsgroups: comp.sys.amiga
Subject: Re: Imagine textures?
Keywords: imagine texture
Message-ID: <61307@masscomp.ccur.com>
Date: 23 Oct 90 13:32:12 GMT
References: <1232@compel.UUCP> <1990Oct22.172606.20815@wam.umd.edu>
Sender: news@masscomp.ccur.com
Reply-To: mark@calvin.westford.ccur.com (Mark Thompson)
Organization: Concurrent Computer Corp. Westford MA.
Lines: 24

In article <1990Oct22.172606.20815@wam.umd.edu> walrus@wam.umd.edu (Udo K Schuermann) writes:
>In article <1232@compel.UUCP> her@compel.UUCP (Helge Egelund Rasmussen) writes:
>>Does anyone know what kind of textures Imagine does support.
>>Can it do bump mapping (modifying the normal vector)?
>
>No.  Actually, I don't know what bump mapping is (I'm so ignorant, it hurts.
>Somebody please explain to me what bump mapping is, please?! --I'm serious).
>The only thing that _sounds_ like bump mapping (I'm getting into deep water
>now) which Imagine can do it calls "Altitude mapping" using brushes.  This
>feature will be in 1.0

As is stated above, bump mapping involves perturbing the surface normal
of an object before it is used in the illumination model. This creates
the illusion of a rough or textured surface without adding polygons.
Frequently, the bump or displacement map is an image in which the intensity
of each pixel indicates the degree of displacement for that point on the
surface. This sounds a lot like the above mentioned "altitude mapping"
with brushes.
+--------------------------------------------------------------------------+
|  Mark Thompson                                                           |
|  mark@westford.ccur.com                                                  |
|  ...!{decvax,uunet}!masscomp!mark   Designing high performance graphics  |
|  (508)392-2480                      engines today for a better tomorrow. |
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