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RE: RE: [Virtools] Particles / follow curve

One pb I had with tunnel : we didn't find anyway to dynamically change
velocity value of the tunnel attribute. While calling SetAttribute,
input data type is "tunnel values", and this type is not recognize in
"parameter op" so that it's impossible to change velocity !!
Arnaud.

> -----Original Message-----
> From: David Callele [mailto:callele@cs.usask.ca] 
> Sent: jeudi 23 mai 2002 17:26
> To: p.hogenboom@mcw.nl; arnaud@simteam.com
> Cc: virtools-user-group@lists.theswapmeet.com
> Subject: Re: RE: [Virtools] Particles / follow curve
> 
> 
> If you can accept a "piece-wise linear approximation" to your 
> curve, then the Particle Tunnel should suit your needs quite 
> well. Just adjust the parameters for each leg as you see fit.
> 
> Good suggestion Patrick!
> 
> David Callele
> 
> ----- Original Message -----
> From: "Patrick Hogenboom" <p.hogenboom@mcw.nl>
> To: <arnaud@simteam.com>
> Cc: <virtools-user-group@lists.theswapmeet.com>
> Sent: Thursday, May 23, 2002 2:44 AM
> Subject: Re: RE: [Virtools] Particles / follow curve
> 
> 
> > Looking at the Particle System Interactor attributes (open the 
> > Attribute
> manager for a nice overview of what attributes are available)
> > I think that Particle Tunnel sounds like the thing you need. The 
> > description in the documentation however is a tad vague... <quote>
> > Tunnel: The Tunnel interactor conduct particles nearby thru 
> the tunnel,
> accelerating or decelerating them. You can set the velocity 
> aimed by the particles travelling in
> > the tunnel, the absorption radius of the tunnel, the 
> attraction shape
> modifies the force of the attraction, the attraction speed, 
> and finally the attraction direction which
> > represent a force modifying the direction of the particle itself. 
> > </quote>
> >
> > Maybe local wind or magnet could be of some use too... haven't used 
> > them
> before.
> >
> > Good luck experimenting
> >
> > Ciao, Patrick
> >
> > 5/23/2002 10:28:18 AM, "Arnaud Muthelet" <arnaud@simteam.com> wrote:
> >
> > >Well we tried large collection of 3DSprites .. but performances 
> > >seriously drop down while increasing the number of sprites 
> (and their 
> > >attached scripts). (We need at least 500 - 1000 elements !) And as 
> > >for the deflectors, we need to handle long and complex 
> pathways so I 
> > >sadly believe it could be painfull to put it all together. 
> Thank you 
> > >anyway, Arnaud.
> > >
> > >> -----Original Message-----
> > >> From: David Callele [mailto:d.callele@shaw.ca]
> > >> Sent: jeudi 23 mai 2002 06:51
> > >> To: arnaud@simteam.com
> > >> Cc: virtools-user-group@lists.theswapmeet.com
> > >> Subject: Re: [Virtools] Particles / follow curve
> > >>
> > >>
> > >> It would be difficult to do but you could simulate a 
> curve by using 
> > >> various particle attractors, etc..
> > >>
> > >> Lot's of twiddling but that is one option.
> > >>
> > >> Could you just use a large collection of 3D Sprites instead and 
> > >> tell them to follow the curve?
> > >>
> > >> David Callele
> > >>
> > >> ----- Original Message -----
> > >> From: "Arnaud Muthelet" <arnaud@simteam.com>
> > >> To: "'jean-marc gauthier'" <jean-marc.gauthier@nyu.edu>
> > >> Cc: <virtools-user-group@lists.theswapmeet.com>
> > >> Sent: Wednesday, May 22, 2002 11:39 AM
> > >> Subject: RE: [Virtools] Particles / follow curve
> > >>
> > >>
> > >> > well, I already tried that one..but in that case the
> > >> particles don't
> > >> > actually 'follow" the curve, but are "emitted from the
> > >> curve", which
> > >> > is visually rather different..what I need is particles
> > >> running along
> > >> > the curve... Thx anyway,
> > >> > Arnaud.
> > >> >
> > >> > ____________________________________________
> > >> > Arnaud MUTHELET               SIM TEAM
> > >> > arnaud@simteam.com            http://www.simteam.com
> > >> > <http://www.simteam.com/>
> > >> >
> > >> > 11 Boulevard Brune - 75014 PARIS - FRANCE
> > >> > tel: 33.(0)1.45.45.15.55
> > >> > fax: 33.(0)1.45.45.16.17
> > >> >
> > >> > ____________________________________________
> > >> >                   SIM TEAM
> > >> >  un autre regard sur la realite virtuelle
> > >> >
> > >> > ____________________________________________
> > >> >
> > >> > -----Original Message-----
> > >> > From: jean-marc gauthier [mailto:jean-marc.gauthier@nyu.edu]
> > >> > Sent: mercredi 22 mai 2002 19:16
> > >> > To: arnaud@simteam.com
> > >> > Cc: virtools-user-group@lists.theswapmeet.com
> > >> > Subject: Re: [Virtools] Particles / follow curve
> > >> >
> > >> >
> > >> > Hi there
> > >> >
> > >> > You can create a curve in Virtools and turn it into a
> > >> particle emitter
> > >> > using the attribute setup. I hope this helps.
> > >> >
> > >> > Jean-Marc Gauthier
> > >> > http://www.tinkering.net
> > >> >
> > >> >
> > >> >
> > >>
> > >
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