openNURBS Initiative

The openNURBS Initiative provides CAD, CAM, CAE, and computer graphics software developers the tools to accurately transfer 3-D geometry between applications.

The tools provided by openNURBS include:

A file format specification and documentation.
C++ source code libraries to read and write the file format. Windows, Mac, and Linux are supported.
Quality assurance and revision control.
Various supporting libraries and utilities.
Technical support.

openNURBS is an open source toolkit for reading and writing models in the 3DM format. Our full-featured development platform is Rhino.

Links

openNURBS Initiative Web Site

Downloads

openNURBS Version 4.0

openNURBS Documentation

openNURBS Utilities

openNURBS Specific Articles (sorted by last modified)

openNURBS FAQ Answers to frequently asked questions about the openNURBS toolkit.

Periodic Curves and Surfaces A discussion of periodic knot vectors.

Brep Loop and Edge Directions How to determine the orientation of an Brep loops and edges.

Reading Instance References with Non-Uniform Scales How to deal with non-uniformly scaled instance references when reading a 3DM file.

Using openNURBS 4.0 with Visual C++ 6.0 How to use Visual C++ 6.0 to build the openNURBS toolkit.

Using openNURBS 4.0 with Visual C++ 2005 Express Edition How to use Visual C++ 2005 Express Edition to build the openNURBS toolkit.

NURBS Geometry Overview A discussion of NURBS geometry in openNURBS.

Superfluous Knot Question A discussion of superfluous knots and openNURBS.

Reading Render Meshes with openNURBS How to use the openNURBS toolkit to read render meshes from a 3DM file.