[PD] stereo vision

Wed Aug 27 20:06:15 CEST 2008

Hey,
I got myself a pair of anaglyph glasses (like you get at the cinema)- and managed to play around quite successfully with the stereo patch in gem examples (pd extended- Have to be green and red glasses (not the blue and red i think).
Regards
kilshaw
Simon Kilshaw
Lecturer in Music Technology
RWCMD

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Today's Topics:

   1. Re: textBox (like in MAX) (Hans-Christoph Steiner)
   2. Re: flext/externals docs, svn + some new stuff!
      (Hans-Christoph Steiner)
   3. Csound opcode Moogladder to Pd? ( Anton H?rnquist )
   4. Csound opcode Moogladder to Pd ( Anton H?rnquist )
   5. Re: Csound opcode Moogladder to Pd (Frank Barknecht)
   6. Re: Csound opcode Moogladder to Pd? (Frank Barknecht)
   7. stereo vision (olsen wolf)
   8. Re: Csound opcode Moogladder to Pd? (Claude Heiland-Allen)

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Message: 1
Date: Tue, 26 Aug 2008 19:42:29 -0400
From: Hans-Christoph Steiner <hans at eds.org>
Subject: Re: [PD] textBox (like in MAX)
To: marius schebella <marius.schebella at gmail.com>
Cc: pd-list at iem.at, IOhannes m zmoelnig <zmoelnig at iem.at>
Message-ID: <0819D8CD-7522-436B-8255-1D6ED7317970 at eds.org>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

I've been working on [tkwidgets/text] but it's still a bit buggy.

.hc

On Aug 26, 2008, at 10:49 AM, marius schebella wrote:

> you mean textfield?
> [entry] is quite similar. comes with pdx.
> marius.
>
>
> Damien Henry - Voxler wrote:
>> Hello,
>>
>> Is there a lib somewhere that provide to pd the textBox object  
>> from MAX ?
>>
>> Thanks in advance,
>> Damien
>>
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------------------------------

Message: 2
Date: Tue, 26 Aug 2008 19:47:26 -0400
From: Hans-Christoph Steiner <hans at eds.org>
Subject: Re: [PD] flext/externals docs, svn + some new stuff!
To: patrick <puredata at 11h11.com>
Cc: pd-list at iem.at, Thomas Grill <gr at grrrr.org>
Message-ID: <BE6F0F90-20A9-4BF9-887D-9DC6B587F68A at eds.org>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

I am not really a fan of svn:externals and before we start using them  
a lot, we really need to look at the issues.  Thomas' system has been  
working for years.  If it ain't broke, don't fix it :).

.hc

On Aug 23, 2008, at 3:18 PM, patrick wrote:

> hi,
>
> i think pd-dev people should remove externals/grill and like pdmtl /
> gridflow checkout your svn.
> it will avoid many questions about flext not being updated and such.
>
> but i can't checkout your svn. i think you need to permit anonymous
> checkout.
> pat
>
>
>
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Message: 3
Date: Wed, 27 Aug 2008 09:13:28 +0200
From: " Anton H?rnquist " <anton.hornquist at gmail.com>
Subject: [PD] Csound opcode Moogladder to Pd?
To: pd-list at iem.at
Message-ID:
	<58a0928c0808270013r6c7fadedy2de1e8758961a9f5 at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

> Here is a dll of Frank's moogladder~ v.02 compiled against pd 0.40_2
> The code should go in svn somewhere.
> ( I replaced 2*M_PI in the code with TWO_PI to avoid a multiply
> (compiler optimisation maybe does that already)).

Thanks, Martin!

Out of curiosity - what compiler did you use? I've never compiled
externals on win xp but would like to learn how. Is it possible to use
the free version of MS Developer Studio? Other alternatives?

I'd like to try to make a stereo version of moogladder~ and also try
tanh optimizations to reduce the cpu load.

/Anton

------------------------------

Message: 4
Date: Wed, 27 Aug 2008 09:18:38 +0200
From: " Anton H?rnquist " <anton.hornquist at gmail.com>
Subject: [PD] Csound opcode Moogladder to Pd
To: pd-list at iem.at
Message-ID:
	<58a0928c0808270018w1fed3676tba57e9a7e741fbdf at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

> I now made a version where cutoff and resonance are signals.  This
> version is a bit more CPU intensive now, as some computations had to
> move into the DSP loop to react to the changes in center frequency.

Awesome! To my ears it sounds great - very close to the Csound-version.

> I played a bit with a rational tanh approximation from the music-dsp
> list but it didn't sound good anymore. If someone wants to play with
> other approximations e.g. table lookup: Just change the function
> "mytanh".

Some optimizations are needed for reducing cpu load, true, I'll look into it.

> The filter response gets nasty and loud if the center frequency is near
> or above the sampling rate. Maybe it should be restricted as well. But
> then, resonance at 1 will make everyone jump, too...

Yeah I noticed that aswell. I think the Csound-version has cutoff
restricted to 0...1, which is 0...11050 in hertz.

Thanks again.

/Anton

------------------------------

Message: 5
Date: Wed, 27 Aug 2008 10:08:13 +0200
From: Frank Barknecht <fbar at footils.org>
Subject: Re: [PD] Csound opcode Moogladder to Pd
To: pd-list at iem.at
Message-ID: <20080827080813.GA17886 at footils.org>
Content-Type: text/plain; charset=us-ascii

Hallo,
Anton H?rnquist hat gesagt: // Anton H?rnquist wrote:

> > The filter response gets nasty and loud if the center frequency is near
> > or above the sampling rate. Maybe it should be restricted as well. But
> > then, resonance at 1 will make everyone jump, too...
> 
> Yeah I noticed that aswell. I think the Csound-version has cutoff
> restricted to 0...1, which is 0...11050 in hertz.

Only resonance is restricted to 0 and 1. It is in the pd version as
well. I made some tests now and it seems it's not the cutoff frequency
alone that makes the filter run wild. With resonance set to 0 a cutoff
of 96kHz when running at SR = 48kHz doesn't go wild. But set resonance
to 0.1 and it runs away. 

So in the end I'd say, just be careful and if in doubt [clip~] your
input values. 

Another issue may be denormalization, so some PD_BIG_OR_SMALL checks
could be useful.

Ciao
-- 
Frank Barknecht

------------------------------

Message: 6
Date: Wed, 27 Aug 2008 10:10:38 +0200
From: Frank Barknecht <fbar at footils.org>
Subject: Re: [PD] Csound opcode Moogladder to Pd?
To: pd-list at iem.at
Message-ID: <20080827081038.GB17886 at footils.org>
Content-Type: text/plain; charset=us-ascii

Hallo,
Martin Peach hat gesagt: // Martin Peach wrote:

> Here is a dll of Frank's moogladder~ v.02 compiled against pd 0.40_2
> The code should go in svn somewhere.
> ( I replaced 2*M_PI in the code with TWO_PI to avoid a multiply 
> (compiler optimisation maybe does that already)).

Did you define that yourself? My math.h doesn't have TWO_PI ...

Ciao
-- 
Frank

------------------------------

Message: 7
Date: Wed, 27 Aug 2008 10:29:51 +0200
From: "olsen wolf" <sesselastronaut at googlemail.com>
Subject: [PD] stereo vision
To: pd-list <pd-list at iem.at>
Message-ID:
	<52bc3f2b0808270129o660c5c6dpf59ee6dbca989bca at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

i posted this a few days ago i guess it didn't came through...
> hi
> i just got 2 logitech webcams at once running & started playing around with them. my curiosity is orbiting around computer stereo vision & construction of depth. is anyone
> experienced with things like binocular disparity algorythm for stereo vision & might have some recommendations? as far as my nose dipped into research there's nothing within pds extensions?!
> thanks for hints & salutis
> olsen

-- 
Planet Pluto bleibt!

------------------------------

Message: 8
Date: Wed, 27 Aug 2008 10:48:56 +0100
From: Claude Heiland-Allen <claudiusmaximus at goto10.org>
Subject: Re: [PD] Csound opcode Moogladder to Pd?
To: PD-List <pd-list at iem.at>
Message-ID: <48B52308.60607 at goto10.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Frank Barknecht wrote:
>> ( I replaced 2*M_PI in the code with TWO_PI to avoid a multiply 
>> (compiler optimisation maybe does that already)).
> 
> Did you define that yourself? My math.h doesn't have TWO_PI ...

depending on compiler options, my math.h doesn't have M_PI ...

http://c-faq.com/fp/mpi.html

Claude

------------------------------

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