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For a while now I've been interested in prototyping parametric ways to generate geometry. The nodeview of Grasshopper reminds me a lot of the nodeviews we have in blender.

I was thinking, with the new pynodes feature maybe somebody has started to do work on node based parametric geometry creation, or does pynodes not make that possible?

edit: I'm already able to write scripts that generate parametric geometry using BMesh API.

edit2: example video of Grasshopper in action

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Sverchok

There is such a tool, it is called Sverchok. It's russian for "Cricket" as a sign of respect to Grasshopper. Sverchok is a Blender add-on that works on all platforms, and has over 180 node types.

To get a sense of what people are making with Sverchok checkout the google+ group

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  • $\begingroup$ At this point Sverchok is the closest thing to Grasshopper for Blender pyNodes. The development versions of Sverchok are worth checking. 50+ nodes done. $\endgroup$
    – zeffii
    Apr 21, 2014 at 16:57
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Not really.

There have been experimental projects, but nothing too usable from what I've seen (there was some test using PyNodes with BMesh API: link

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In my opinion writing a script makes more sense. You probably will have to import a few libraries(which I don't think you can do with pynodes). Geometric PyNodes hasn't been officially added yet. It's just experimental add-on at the moment.

You will need to have a fair understanding of scripting and python - whatever the outcome. So if you don't already know python, now is the time to learn.

Here's the link to geometry pynodes if you're interested: https://www.gitorious.org/blender-trunk/addons/trees/geometry_nodes/py/scripts/addons/geometry_nodes

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    $\begingroup$ PyNodes is not only in a development version, its in 2.67 release. $\endgroup$
    – ideasman42
    May 30, 2013 at 12:08
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    $\begingroup$ watch a few Rhino videos and you might change perspective. I imagine maybe a blend of scripting and node combinations would be possible. (i didn't downvote btw) $\endgroup$
    – zeffii
    May 30, 2013 at 12:10
  • $\begingroup$ @zeffii, OK, I'll check out a few. I know it wasn't you, but I did deserve that downvote for having the wrong information :P $\endgroup$
    – CharlesL
    May 30, 2013 at 12:16
  • $\begingroup$ @zeffii if your interested, I added the geometry pynodes repository to the answer. $\endgroup$
    – CharlesL
    May 30, 2013 at 12:27
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You may want to try sverchock:

Here's the description from author's page:

Sverchok - is parametric tool for an architect, designer, lets you to programm object's form without knowing program longuages.

Breafly, it is node programing of geometry, but in completely virtual way (with ability to bake geometry to blender). You would work with pure data, as floats, matrixes, lists, formulas, etc.

Those who familiar with Houdini or Rhinoceros 3D might know the visual scripting language Grasshopper, which Sverchok has been inspired by. Using a similar node based visual programming principle, Ukrainian/Russian artists Nikita and Alexander trying to bring this functionality to Blender users.

To understand what is parametric in ARCHITECTURE you'd better see my breaf explenation here.

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