[ODE] Collision response etc

[Byron Wright]

This leads me back to my initial question, how do I find the forces
being applied to either object after the collision (since I can
determine the acceleration from that, which would give me a good
indication of the "jerk" ). When calling dBodyForce(bodyID) in or after
the collision callback I always get a value of 0 (and yes I am calling
it on the dynamic object since calling this on a static object is
undefined).

-Byron

-----Original Message-----
From: ode-admin@q12.org [mailto:ode-admin@q12.org] On Behalf Of Nate W
Sent: Tuesday, January 28, 2003 9:44 PM
To: ode@q12.org
Subject: RE: [ODE] Collision response etc


On Tue, 28 Jan 2003, Byron Wright wrote:

> I would really like to take advantage of the physics engine and use 
> "real world" values to simulate "my world". Also, if I know the forces

> involved when the objects collide I could also do things like adjust 
> the amplitude, frequency and such of the sounds... the harder the 
> impact the louder the bang!, objects might have different frequencies 
> and amplitudes based on their mass and the magnitude of the forces 
> (although a very dumbed down simulation).

Suppose you make noises as a function of the jerk applied to an object?

That is, the change of the total acceleration of an object from one step
to the next?  A huge jerk might be a pretty good indicator of a
collision.  

It simplifies things a bit in that your noise-making code would only be
looking at a single objects when it decides what noise to make... that
might be too simple, but then again it might be efficient and realistic.
I dunno... comments?

-- 

Nate Waddoups
Redmond WA USA
http://www.natew.com


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