[PD] Pure coherent noise (Perlin noise)

[martin.peach at sympatico.ca]

You can make coherent noise by adding filtered noise~ objects. See the attached patch. This is similar to one-dimensional Perln noise. Would two- or three- dimensional noise be useful in pd?
Martin


> 
> From: <renaud.herne at belgacom.be>
> Date: 2006/11/14 Tue AM 10:11:25 EST
> To: <czhenry at gmail.com>, 
> 	<pd-list at iem.at>
> Subject: RE: [PD] Pure coherent noise (Perlin noise)
> 
> 
> 
> Thanks for your enthusiasm Chuck
> 
> I was thinking about something like this.
> The tutorial made by johannes m zmölnig  (http://iem.at/pd/externals-HOWTO/ ) seems explicit enough
> But I wanted to be sure that it does not exist first.
> I try to avoid reinventing the wheeel (although mine will be rounder than what already exists ;-)
> 
> I am just amazed that there is no (not yet?) such thing as Perlin noise in PD.
> It could be useful to add some correlated variations of user input and be the source of various effects.
> I used to link to libnoise for some DemoGL applications (a framework to develop OpenGL appications in C++ http://www.sd.nl/demogl/)
> If it sounds as good as it looks there must be interesting things to do.
> 
> I'll let you know
> 
> Renaud
> 
> 
> -----Original Message-----
> From: Charles Henry [mailto:czhenry at gmail.com]
> 
> Sent: 13 November 2006 18:05
> To: renaud.herne at belgacom.be
> Subject: Re: [PD] Pure coherent noise (Perlin noise)
> 
> Hey, Renaud,
>   If you've got libnoise, then you might as well build a pd external, which is a kind of "wrapper" where you can supply arguments to your functions, and include methods for changing the arguments in real time.
>   It's not hard, although the first one (external) usually is hard to understand.  See IOHannes' Howto build an external documentation first
> off.   Then, simply "rip off" pan~ and supply your own code to the
> perform routine, change the name, include your library headers, change the makefile to include your library, and you're off and running.  To understand more functionality of making a pd external, read through m_pd.h--all of the Pd-specific functions you can use in an external are there for you.
>   There are also many "tiny" details you will need to learn to get just what you want.  Good luck, and feel free to ask any questions.
>   There was a previous post regarding Perlin noise, although I don't think it was resolved.  Search the Pd-list archives to find out more.
> 
> Chuck
> 
> 
> On 11/13/06, renaud.herne at belgacom.be <renaud.herne at belgacom.be> wrote:
> >
> >
> > Hello,
> >
> > Do someone know if there is a class that generates coherent (Perlin)
> 
> > noise in Pure Data?
> > OK, I could build it myself by interpolating random numbers or linking
> 
> > to libnoise but if it already exists...
> > Thank you
> >
> > Renaud
> >
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