algorithmic modeling for Rhino
Plankton is a free and open library implementing the half-edge data structure for polygon meshes.
This way of storing the mesh connectivity information allows easier adjacency queries and supports mesh faces with any number of sides (Ngons), not just quads and triangles.
The plankton library is intended primarily to be referenced and used from scripts, but basic GH components for conversion and topology extraction are provided, and more may be added at a future date.
Plankton is still very much a work in progress. This is a first release, and methods/features will change in future versions.
Currently most of the methods relate to extracting topology information from existing meshes, and converting between Rhino meshes and Plankton meshes, but the intent is to over time add more ways of actually modifying and building meshes.
Please share your thoughts and ideas in the forum...
download the latest release here:
https://github.com/meshmash/Plankton/releases/latest
This library is distributed under the terms of the GNU Lesser General Public License (LGPL).
(The source is available on GitHub here)
Copyright 2013 Daniel Piker and Will Pearson
For more on half-edges, see:
http://www.flipcode.com/archives/The_Half-Edge_Data_Structure.shtml
http://openmesh.org/Documentation/OpenMesh-2.0-Documentation/mesh_hds.html
http://www.graphics.rwth-aachen.de/media/papers/directed.pdf
Thanks to the people I have had many conversations about meshes with over the last few years that have really helped inspire and inform this work: including: Daniel Hambleton, John Harding, Kristoffer Josefsson, Harri Lewis, Giulio Piacentino, and especially Dave Stasiuk, who also shared code that helped get this working.
Website: https://github.com/meshmash/Plankton
Members: 383
Latest Activity: Oct 9
Following on from the images I posted recently (here),I am now making available the source script for Cytoskeleton.First,…Continue
Tags: mesh, Plankton, Weaverbird
Started by Daniel Piker. Last reply by Serge Jul 31, 2020.
Hi,I’m using mesh machine to have a good triangulation of my mesh but I was wondering if I can set target valency for my edges in order to control triangulation. I want to have a triangulation where…Continue
Started by Contestables Jan 21, 2020.
Here are some demo's of remeshing with Plankton combined with some relaxation functions from Kangaroo.(Similar to what I described here: …Continue
Tags: remeshing, mesh, Kangaroo, Plankton
Started by Daniel Piker. Last reply by Contestables Jan 20, 2020.
Plankton 0.4.2. If I take any simple mesh object generated in grasshopper and convert it with the PMesh module, then try running the following python code, I get:for v in…Continue
Started by Cory. Last reply by Will Pearson Nov 27, 2018.
Comment
Hi Hi,
is it just me? I don't get it working in GH. The "CreatePlankton" turns red and says it couldn't find "Plankton, Version 0.2.0.0....." though I have copied the Plankton.dll and .gha in the components folder
Cheers
Hehe, you've got it :)
Thanks for pointing that out, Anders! Very useful to know for loading any library into a python script component. I'll gladly add python examples to the documentation wish list :-).
FYI, I just had a quick go at implementing Plankton within a Python component, seems to work great. You just have to add a path reference to the Planton.dll, either in the script itself or through the EditPythonScript editor. Attached the file: PlanktonDemoPython.ghx
Ignore my last comment! it seems that you have to restart both grasshopper and rhino to work..
Hi Josh. I've not tried it yet, but this is just a .net library so yes, it should work in Python
wow this looks pretty neat. Is it possible to use this with rhinoPython?
Thanks all for the comments, and sorry for the delay in posting the source code.
In response to some of the questions below - the Rhino-mesh-to-Plankton-mesh function does currently make use of the TopologyEdges from RhinoCommon to iterate through the edges. I think it should be possible to do this a different way with some checks for which edges have already been visited, that would allow an input of closed polylines (this is also the only real use of Rhino specific code).
Compatibility with Turtle is definitely high on the list of priorities for next things to add. Plankton-to-turtle should be straightforward, Turtle-to-Plankton will I think need the same changes mentioned above first.
The dual function definitely still has some bugs - particularly when it comes to non-closed meshes. I'm trying to fix this now, but will post at the end of today wherever I get to.
Faces connected by a point vs Faces connected by an Edge should be possible with the functions in the current release - I'll try and post a demo soon.
cool tool! its truly amazing how far you guys brought meshes in gh!
one question and tree suggestions.
the question is why inputting a for instance the plankton dual (c#) to the plankton deconstruct fails? i guess its due to the wip state of the tool.
its also would be nice if there would be a way to convert closed polylines to plankton mesh.
and another suggestion is to get the faces directly adjacent to a face distinguished by the one who share an edge and the one who just share a point.
also compatibility to turtle would be nice!
thx you!
Excited to try this out! How much GH/Rhino specific code is the .dll? Would be fun to use it in Unity!
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