[ODE] ode and sound effects

[Luca Romagnoli]

plaese consider 2 cilinder with a fixed point in center of gravity and they
can only rotate around them.
if they rotate and they are enough near they can collide and in this example
we have to consider the vel of colliding points and the vel of these points
can be calculate using the angular vel of ciliders.


----- Original Message ----- 
From: "DjArcas" <djarcas at hotmail.com>
To: "Luca Romagnoli" <lucak at qubica.net>; <ode at q12.org>
Sent: Thursday, January 15, 2004 11:25 AM
Subject: Re: [ODE] ode and sound effects


> A body can't have angular vel but no linear vel and then collide with
> something static - it's not moving!
>
> ----- Original Message ----- 
> From: "Luca Romagnoli" <lucak at qubica.net>
> To: "DjArcas" <djarcas at hotmail.com>; <ode at q12.org>
> Sent: Thursday, January 15, 2004 10:15 AM
> Subject: Re: [ODE] ode and sound effects
>
>
> > for example if the body has only angular vel and no linear vel.(it means
> it
> > is rotating) and collide with a static body, using only linear vel the
> > result will be a null sound, so i wish to consider the angular vel.
> > this is an extreme example but in a very realistic simulation these
> > difference should be considered.
> >
> > ----- Original Message ----- 
> > From: "DjArcas" <djarcas at hotmail.com>
> > To: "Luca Romagnoli" <lucak at qubica.net>; "Jon Watte"
> > <hplus-ode at mindcontrol.org>; <ode at q12.org>; "Manohar B.S"
> > <sciphilog at yahoo.com>
> > Sent: Thursday, January 15, 2004 10:56 AM
> > Subject: Re: [ODE] ode and sound effects
> >
> >
> > > How would the angular velocity of a body affect the sound it makes?
(in
> > the
> > > real world I'm sure it would affect the soundwaves in some fashion,
but
> > > generally speaking all you can change is pitch and volume, and EQ if
> > you're
> > > lucky)
> > >
> > > ----- Original Message ----- 
> > > From: "Luca Romagnoli" <lucak at qubica.net>
> > > To: "DjArcas" <djarcas at hotmail.com>; "Jon Watte"
> > > <hplus-ode at mindcontrol.org>; <ode at q12.org>; "Manohar B.S"
> > > <sciphilog at yahoo.com>
> > > Sent: Thursday, January 15, 2004 7:58 AM
> > > Subject: Re: [ODE] ode and sound effects
> > >
> > >
> > > > dear friends of virtual world,
> > > > thank you for your answers.
> > > > i'm using cylinders and i wish to consider the angular velocity of
the
> > > body
> > > > to obtain a very realistic sound effects.
> > > > do you know some ode's function to obtain the famous
Vp=Vg+(angularVel
> > X
> > > p)
> > > > so i can obtain the real speed vector(Vp) of the colliding point p?
> > > >
> > > > i think, the energy method is a clever idea but is it easy to
implent
> it
> > > in
> > > > ode? if we have more that 2 bodies colliding at the same time with
our
> > > ref.
> > > > body?
> > > >
> > > > PS: if someone has code ready it should be interesting to include it
> to
> > > ode
> > > > lib, if the ode's bosses agree.
> > > >
> > > >
> > > > ----- Original Message ----- 
> > > > From: "DjArcas" <djarcas at hotmail.com>
> > > > To: "Jon Watte" <hplus-ode at mindcontrol.org>; "Luca Romagnoli"
> > > > <lucak at qubica.net>; <ode at q12.org>
> > > > Sent: Wednesday, January 14, 2004 8:32 AM
> > > > Subject: Re: [ODE] ode and sound effects
> > > >
> > > >
> > > > > I would suggest you actually get the impulse magnitude. (That's
the
> > > system
> > > > I
> > > > > used in MotoGP and Burnout2)
> > > > >
> > > > > IIRC, that's the relative speed of the two bodies multiplied by
> their
> > > > mass.
> > > > >
> > > > > Adam
> > > > >
> > > > > ----- Original Message ----- 
> > > > > From: "Jon Watte" <hplus-ode at mindcontrol.org>
> > > > > To: "Luca Romagnoli" <lucak at qubica.net>; <ode at q12.org>
> > > > > Sent: Tuesday, January 13, 2004 2:17 PM
> > > > > Subject: RE: [ODE] ode and sound effects
> > > > >
> > > > >
> > > > > >
> > > > > >
> > > > > > Just get the relative speed of the two bodies colliding.
> > > > > >
> > > > > > Something like this:
> > > > > >
> > > > > > Vec3 velA, velB;
> > > > > > dBodyID bodyA = dGeomGetBody( bodyA );
> > > > > > dBodyID bodyB = dGeomGetBody( bodyB );
> > > > > > dBodyGetLienarVel( bodyA, velA );
> > > > > > dBodyGetLinearVel( bodyB, velB );
> > > > > > velA -= velB;
> > > > > > float relativeSpeed = sqrtf( velA.LengthSquared() );
> > > > > >
> > > > > >
> > > > > > Cheers,
> > > > > >
> > > > > > / h+
> > > > > >
> > > > > > -----Original Message-----
> > > > > > From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf
Of
> > > Luca
> > > > > > Romagnoli
> > > > > > Sent: Tuesday, January 13, 2004 8:33 AM
> > > > > > To: ode at q12.org
> > > > > > Subject: [ODE] ode and sound effects
> > > > > >
> > > > > >
> > > > > > Hi Super Boies,
> > > > > > i'm using this fantastic library to develop a realistic
simulation
> > so
> > > i
> > > > > want
> > > > > > to play sound when two or more bodies collide.
> > > > > > to do that i need the speed of a contact point inside the
> > nearCallback
> > > > > > function of a specific rigid body.
> > > > > > Have someone this function and can you share it with us?
> > > > > > thank you very much
> > > > > >
> > > > > >
> > > > > >
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