Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!brutus.cs.uiuc.edu!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!cs121jj
From: cs121jj@ux1.cso.uiuc.edu
Newsgroups: comp.sys.amiga
Subject: Re: Sculpt trouble?!?
Message-ID: <15500032@ux1.cso.uiuc.edu>
Date: 30 Mar 90 01:39:05 GMT
References: <1243@kunivv1.sci.kun.nl>
Lines: 26
Nf-ID: #R:kunivv1.sci.kun.nl:1243:ux1.cso.uiuc.edu:15500032:000:1510
Nf-From: ux1.cso.uiuc.edu!cs121jj    Mar 29 14:58:00 1990


Try making the inside of the cylinder a mirror, to reflect all light inside the
cylinder outside into the rest of the world.  I don't think this should be too
hard, as if you didn't care about the cylinder (what it looked like and if it
was astheticly pleasing and so forth), you could just make the whole cylinder
a mirrored object and do the same object placement.

Also, have you tried a cone so that the narrow (open) end was facing the face
and the wide (closed) end was parallel to the point light source?  [I would
tend to think that this way, only light rays that are parallel to the opening
would escape.]

You could even combine the two ideas above and see what happens.  Also, try
(for an approach that is object-resulted) making a disc that is luminous and
placing it where the spotlight would end up being shown.  If it is on the floor
of a stage where the curtains are drawn (for instance), then you could put half
of the disc on the plane of the stage & perpendicular to the curtain & half
of the disc is not visible, so there would only be a semi-circle visible from
the front of the stage {all 3 requirements must be met there}.

Just tossing some ideas at you...I can't guarantee any of them because I don't
have SA4D installed on my machine (yet)...

-------------------------------------------------------------------------------
Jeff Nicholson             jeffo@mrcnext.cso.uiuc.edu           Amiga is #1!!!!
-------------------------------------------------------------------------------