Path: utzoo!attcan!uunet!edsews!rphroy!pte!kiy
From: kiy@pte.UUCP (Kevin Young)
Newsgroups: comp.graphics
Subject: Re: More Sound Tracing
Summary: The *Sound* particle?
Message-ID: <364@pte.UUCP>
Date: 5 Jan 89 14:01:45 GMT
References: <3458@uoregon.uoregon.edu>
Reply-To: kiy@pte.UUCP (Kevin Young)
Organization: Precise Technology & Electronics, Warren, MI
Lines: 28

In article <3458@uoregon.uoregon.edu> markv@drizzle.UUCP (Mark VandeWettering) writes:
>I would like to present some preliminary ideas about sound tracing, and
>critique (hopefully profitably) the simple model presented by Kjartan
>Pierre Emilsson Jardedlisfraedi...
>	:	:	:	:	:	:	:	:
>Mark VandeWettering

This is a fascinating discussion.  I have one thought that I haven't 
seen mentioned (or obviously missed :-).  This discussion seems to
assume that light and sound are identical in property.  From what I
remember from high school physics, light is made up of discrete particles.
Sound is the propogation of wave energy through a medium.  I know light
particles may be thought of as both waves AND particles but it seems as
though ray tracing is particle oriented.  The difference to me (and I
certainly would like to hear arguments) is that as a sound wave propogates,
each molecule transfers a part of its energy to severeral other molecules.
The original molecule never actually makes it to the destination, only
its energy.  This seems to constrast the ray approach in which the ray 
continues, uninhibited, until it is absorbed or leaves the frame.

Comments?

kiy
-- 
>|< Kevin Young                         uunet!{edsews,umix}!rphroy!pte!kiy  
    Precise Technology & Electronics, Inc.
    (The opinions expressed here are true, the flames have been changed to
     infect the innocuous.)