[ODE] Energy Loss in Collision (now OT:Sound)

[DjArcas]

Welcome to the wonderful world of trying to attach sound to physics events.
The way I've done it for games in the past is to use the magnitude of the
impulse in a collision to determine the 'size' (volume, pitch, sample) of
the sound. You should be able to get that from your callback procedure that
generates the contact points. You WILL need to damp down the number of
sounds you get, and you will need to throw away small events, or you'll end
up triggering hundreds of sounds.

As for scraping, the way I did it on Burnout2 was to record a sample of X
frames. If the car was colliding for more than Y frames out of X, the scrape
sound played. If it was less, the scrape sound faded out. If the number of
colliding frames then got above the threshold, start fading the scrape sound
back up again.

Adam

----- Original Message ----- 
From: "Manohar B.S" <sciphilog at yahoo.com>
To: <ode at q12.org>
Sent: Wednesday, November 19, 2003 7:43 AM
Subject: [ODE] Energy Loss in Collision


>
> I am trying to add audio effects to my ODE simulation.
> That is a sound event is registered for 'Hitting'
> collision.
>
> To compute the amplitude of the sound texture for a
> collision event I need to find the energy dessipated
> as head/sound in the point of contact. What's the best
> way to do this??? is it Kinetic energy difference
> bfore and after collision?
>
> Another thing, how to register for a sliding event in
> which a shrilling sound is produced?
>
>  Thanks & Regards
> Manohar
>
>
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