Grasshopper

algorithmic modeling for Rhino

Hi all! Please anyone can help me telling me how can i get a surface subdivision like this one in the foto?Is that possible with some reaction diffusion algorithm? I'm very interested in creating natural patterns (for instance the zebra's,the tiger's and many others). Thanks you all :)

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It looks like it might be reaction-diffusion, but it could also be something more geometric. In fact the strong variation in band width makes me suspect something other than R/D, or maybe R/D with some additional morphing.

The problem with R/D patterns is that they're pixel based, and Grasshopper doesn't have a bitmap data type. So either you need to use a plug-in which does, or use some other approach like meshes with coloured vertices. Either way at the end you still need to convert your sample-space to nurbs curves.

Another thing you can try is to start with a regular pattern (nurbscurves or polylines, perhaps some hand-drawn branching) and then deform it in various ways. You could for example set up a vector field consisting of various forces, then have it affect your curve-control-points. Or maybe move control-points using some sort of equations for X and Y...

I'll try!thank you very much David!

It looks totally hand drawn, I wouldn't say it's R/D pattern as they usually have a constant width gap... 

This is an example of a similar pattern produced with R/D:

What u asked for looks hand drawn and is not rd pattern.
I tried to do similar effect using absolute values of Perlin noise.

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