Rhino Importer/Exporter

The Rhino importer/exporter, rw3dm uses OpenNURBS to read and write .3dm files.

rw3dm comes with the following list of programs:

  • on2json converts OpenNURBS .3dm files to geomdl JSON format

  • json2on converts geomdl JSON format to OpenNURBS .3dm files

Use Cases

  • Import geometry data from .3dm files and use it with exchange.import_json()

  • Export geometry data with exchange.export_json() and convert to a .3dm file

  • Convert OpenNURBS file format to OBJ, STL, OFF and other formats supported by geomdl

Installation

Please refer to the rw3dm repository for installation options. The binary files can be downloaded under Releases section of the GitHub repository.

Using with geomdl

The following code snippet illustrates importing the surface data converted from .3dm file:

 1from geomdl import exchange
 2from geomdl import multi
 3from geomdl.visualization import VisMPL as vis
 4
 5# Import converted data
 6data = exchange.import_json("converted_rhino.json")
 7
 8# Add the imported data to a surface container
 9surf_cont = multi.SurfaceContainer(data)
10surf_cont.sample_size = 30
11
12# Visualize
13surf_cont.vis = vis.VisSurface(ctrlpts=False, trims=False)
14surf_cont.render()

References