[GEM-dev] Re: [PD] physical modeling objects for pd

[Cyrille Henry]

B. Bogart wrote:
 > Yes please upload it, I would like to see.
 >

ok, I'm comminting to the usual place 
(http://drpichon.free.fr/pure-data/physical-modeling/)
a directory contening  things needed for this patch.
it's a NewWave clone.
their is an abstraction wich create the matrices patch, and some already 
made matrices.
tell me if there is someting you don't understand.

this patch is old, and was not desing for distributing.
so, you will have some work to make it work on your computer...

you will nead somes abstractions.
I use a lots of "lb" abstraction : it's just a loadbang.


try the patch and tell me all the abstraction you are missing.

the lia object was call liaKD when I made this patch, so I think you can 
make an abstraction "liaKD" contening only "lia"...

so, if you don't get it to work, I'll do this job later...
(documentation first!)


> I've been interested in this stuff for years, but did not have the math to
> deal with the details.
> 
equation are very simple...

> I'm interested in using a few input controls that drive a large number of
> interelated (complex) other controls.. (ie physical environment)
> 
yes, that's what's interesting with this objects : you can build high 
level comportement that would be hard to do with equations etc...
you can do chaotic mouvement very easily.
(02_2D should be chaotique : I'll pay a beer to the first one who can 
explain why it becames peridic ;-)

> These seem pretty fast,
fast for control data. Signal processing is not the same...

> a 4x4 matrix should not have that much more
> overhead? 
what do you mean by overhead?

>A matrix over x-y with forces only applied to Z would be great to
> see also.
> 
> something on my long term to-do list is fluid dynamics...
woww, that's complettly diferent cause each masse has to be conmected to 
all the other masses.


> (maybe we'll have
> to wait a bit for computers to get faster. ;)
>
depend of what kind of simulation you are using :

I think using specific mouvements equations can be necessary.
frinds show my very good things made using matlab! ;-)
I nead to find where i put my fluid mecanique book...

> Thanks for all the work!
> 
thanks,
cyrille

> Ben
> 
> ----- Original Message -----
> From: "Cyrille Henry" <cyrille.henry at la-kitchen.fr>
> To: "B. Bogart" <ben at ekran.org>
> Cc: <gem-dev at iem.kug.ac.at>
> Sent: Tuesday, December 02, 2003 2:47 PM
> Subject: [GEM-dev] Re: [PD] physical modeling objects for pd
> 
> 
> 
>>hello,
>>
>>I've got a patch of 1D masses, in a 2D matrix.
>>so only 1D force can be aply to them.
>>it's very similar to newWave (but less efficient, cause of multi send /
>>receive / route object I use.)
>>this specific patch use primTri for rendering.
>>using curve3d would alow to have less control points, but the physics of
>>the mouvement will be less present..
>>
>>to modify this patch for a 3D masses and lia is on my todo list...
>>
>>if your interested, I can upload it...
>>
>>Cyrille
>>
>>B. Bogart wrote:
>>
>>
>>>Hey all,
>>>
>>>I'm sure your tired of hearing me say this but...
>>>
>>>I think Cyrille's physical modeling stuff would be most beutifully
>>>(gem-wise) manifested in Chris's vertex_array stuff. I think the message
>>>over-head of sending the data to pix_vertex for each vertex would
> 
> probably
> 
>>>be a performance anoyance, so how about something faster to allow these
>>>physical models to be applied to geometry? (I suppose this is also
> 
> closely
> 
>>>related to the issue of high-performance GUI in pd for this stuff...)
>>>
>>>Well I'm just thinking out loud again...
>>>
>>>Oh and cyrille, do you have an example of a patch that uses lia and
> 
> masse in
> 
>>>a two dimentional matrix? (with the ability to put forces on it in 3
>>>dimensions). for example having each node in the matrix control a
> 
> curve3d
> 
>>>control point? :)
>>>
>>>Ben
>>>
>>>----- Original Message -----
>>>From: "Cyrille Henry" <cyrille.henry at la-kitchen.fr>
>>>To: "Frank Barknecht" <fbar at footils.org>
>>>Cc: "PDlist" <pd-list at iem.kug.ac.at>
>>>Sent: Tuesday, December 02, 2003 9:52 AM
>>>Subject: Re: [PD] physical modeling objects for pd
>>>
>>>
>>>
>>>
>>>>Frank Barknecht wrote:
>>>>
>>>>
>>>>
>>>>>Hallo,
>>>>>Cyrille Henry hat gesagt: // Cyrille Henry wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>I have made a serie of objects for physical modeling with pd.
>>>>>>The object send Data but NO AUDIO.
>>>>>>
>>>>>>the aim is to generate data for the control of an audio synthesis
> 
> and/or
> 
>>>>>>video synthesis...
>>>>>>it's just like http://www.sodaplay.com/ for pd.
>>>>>
>>>>>
>>>>>I always loaved soda. Now I have soemthing else to love: Yours are
>>>>>wonderful objects, soo nice.
>>>>
>>>>thank's
>>>>
>>>>
>>>>
>>>>>>I upload sources + object for windows and linux + exemples here :
>>>>>>
>>>>>>http://drpichon.free.fr/pure-data/physical-modeling/
>>>>>
>>>>>
>>>>>Could you also provide a source archive?
>>>>
>>>>ok :
>>>>I add a zip file in the src directory  with the .C files.
>>>>
>>>>cyrille
>>>>
>>>>
>>>>
>>>>>ciao
>>>>
>>>>
>>>>
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>>>
>>>
>>
>>
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> 
>