Perlin Noise implementation

Up to today, I think there is no direct implementation or 'component' in GH of the Perlin Noise function. I wonder if anyone has tryed to program it via script or clusters. Anyway, it might be a nice further addition to GH.

Replies to This Discussion

Permalink Reply by Andrew Heumann on December 3, 2010 at 6:55am

There's a perlin noise graph mapper, and I'm fairly sure you can access a PerlinGraph class via scripting.

Permalink Reply by Evert Amador on December 3, 2010 at 8:23am

Giulio has written a perlin and simplex noise components, he'll make these public sometime in the future in the meantime send me an email.

cheers

Evert

Permalink Reply by Giulio Piacentino on December 3, 2010 at 8:27am

Hi JLX,

in the Grasshopper scripting on RhinoCommon here at McNeel Europe I teach to program a component that does this, in C# and Vb.Net. Grasshopper contains a 1D Perlin noise function (similar to sines summations), but this functionality cannot be directly extended to more dimensions.

I am attaching this additional assembly that forms smooth Perlin noise and Simlex noise, two very well-known smooth noise functions studied by Ken Perlin. Inputs are:

- a point pt: the location to sample
- a number (double) t: the "location" in time
- a scale (number): a multiplier to change the scale of the values passed by pt and t

To install this component:

- download PerlinSimplexNoise.gha to your desktop
- right click the file and choose "Unblock" (might not be necessary, but please do it)
- from the Grasshopper interface, choose File -> Special folders -> Components Folder.
- move PerlinSimplexNoise.gha to that folder (ends with "\Libraries")
- restart Rhino. You'll find the components in the Math tab!

If you want to know more, I suggest to check Simplex noise demystified, by Stefan Gustavson.

- Giulio
__________________
giulio@mcneel.com
McNeel Europe, Barcelona

New release on Food4Rhino

Permalink Reply by Evert Amador on December 3, 2010 at 9:54am

This is it then,

Cheers Giulio.

Evert

Permalink Reply by Giulio Piacentino on December 3, 2010 at 10:28am

Ops, this is the newer version.

- Giulio
__________________
giulio@mcneel.com
McNeel Europe, Barcelona

Permalink Reply by Evert Amador on December 3, 2010 at 1:33pm

Hi Giulio,

Is this the version we looked at in vienna?

Cheers

Evert

Permalink Reply by Giulio Piacentino on December 5, 2010 at 5:14am

Yes, if I remeber correctely it is.

Here also an example for the component. You see the reflections like this in Rhino 5.

- Giulio

Attachments:

perlin-noise-sample-ice-block.ghx, 111 KB

Permalink Reply by Vicente Soler on December 3, 2010 at 10:10am

This and many other procedurals are already available in the RDK, it would be nice to be able to have access to them in Grasshopper.

Permalink Reply by Giulio Piacentino on December 3, 2010 at 10:51am

That's true, a .Net binding for the RDK would be very useful.
I do not know if it is planned to have it in RhinoCommon, at least in the first release.

As far as I remember, however, procedural render textures are mostly either 2D (UV) or 3D (UVW). The above implementation is 4D.

- Giulio
________________
giulio@mcneel.com
McNeel Europe, Barcelona

Permalink Reply by Vicente Soler on December 3, 2010 at 11:08am

I'm not sure if there are any atm, but they should add 4D procedurals to the RDK. If you are going to render an animation, you'd like the waves in the water to move.

Permalink Reply by Giulio Piacentino on December 3, 2010 at 11:23am

Those small waves are either fluid dynamics or might be as well 3Df(u,v,t) = n
- Giulio
________________
giulio@mcneel.com
McNeel Europe, Barcelona

Permalink Reply by Garcia del Castillo on December 3, 2010 at 5:48pm