Rhino Mesh to Plankton HEDS?

[goswinr]

This is not an issue, just a question. I hope its OK to ask here. Can I use Plankton as well via Rhino Python Scripting (without Grasshopper)? How can I convert a Rhinomesh to a Plankton HEDS? (If you reply with an example, C# is fine too)

[pearswj]

Hey @goswinr, sorry for the delay in replying!

Here's a working example, using Plankton via a RhinoPython script to generate a dual mesh...

import clr
import os
import rhinoscriptsyntax as rs
from Rhino.Commands import Result
from Rhino.DocObjects import ObjectType
from Rhino.Input.Custom import GetObject, GeometryAttributeFilter
from scriptcontext import doc

# get path to Grasshopper "Libraries" dir
clr.AddReferenceByName('Grasshopper')
import Grasshopper
lib_dir = Grasshopper.Folders.DefaultAssemblyFolder

# import Plankton (assuming the files are in the Grasshopper "Libraries" dir)
clr.AddReferenceToFileAndPath(os.path.join(lib_dir, "Plankton.dll"))
import Plankton

# import Plankton.gha (contains extension methods which convert to/from RhinoCommon types)
clr.AddReferenceToFileAndPath(os.path.join(lib_dir, "Plankton.gha"))
import PlanktonGh
clr.ImportExtensions(PlanktonGh.RhinoSupport)

def RunCommand():
    gm = GetObject()
    gm.SetCommandPrompt("Select manifold mesh")
    gm.GeometryFilter = ObjectType.Mesh
    gm.Get()
    if gm.CommandResult() != Result.Success:
        return Result.Failure

    mesh = gm.Object(0).Mesh()
    if mesh == None:
        return Result.Failure

    # TODO: check that mesh is manifold and fully welded

    # convert rhino mesh to plankton mesh
    pmesh = mesh.ToPlanktonMesh() # extension method

    # dual mesh and "bake"
    dual = pmesh.Dual()
    doc.Objects.AddMesh(dual.ToRhinoMesh())
    doc.Views.Redraw()

    return Result.Success

if __name__ == "__main__":
    RunCommand()

[goswinr]

ah! thanks. the extension Method ToPlanktonMesh() was what I did not find in Plankton.dll

[goswinr]

In Python I prefer static methods because they have intellisense, so i do:

import rhinoscriptsyntax as rs
import scriptcontext 
import clr
clr.AddReferenceToFileAndPath(r"C:\dev\Plankton.dll") # take from github
clr.AddReferenceToFileAndPath(r"C:\dev\Plankton.gha")

import PlanktonGh.RhinoSupport as prs

mObj = rs.GetObject()
mGeo = rs.coercemesh(mObj)
# TODO: check that mesh is manifold and fully welded

# convert rhino mesh to plankton mesh
planktonMesh = prs.ToPlanktonMesh(mGeo) # static method