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Object-oriented B-Spline and NURBS evaluation library

Project description





NURBS-Python is an object-oriented B-Spline and NURBS surface and curve library for Python with implementations of advanced computation algorithms in an extensible way. It comes with on-the-fly shape visualization options, knot vector and surface grid generators, and more.

NURBS-Python is a pure Python library, therefore there are no external C/C++ or FORTRAN dependencies or any compilation steps during installation. It is tested with Python v2.7.x, Python v3.3.x and later versions. The Python 2 and 3 compatibility library six will be automatically installed during NURBS-Python setup.

Please see the Examples Repository for details on library usage and integration scenarios.


NURBS-Python consists of the following modules and components:

  • Core library
  • Exchange module
  • Visualization component
  • Shapes component

Core Library

The core library is responsible for data storage and evaluation. It is capable of handling B-Spline (NUBS) and NURBS curves and surfaces (single via geomdl.BSpline and geomdl.NURBS, multiple via geomdl.Multi modules). It provides an abstraction layer for easy extensibility (geomdl.Abstract), allows a variety of customizations and helper functionality, such as surface (geomdl.CPGen module) and uniform knot vector (geomdl.utilities.generate_knot_vector) generators.

The Core Library module of NURBS-Python is self-contained. It implements all the necessary maths and linear algebra operations without needing any other external modules.

Exchange Module module can export control points and evaluated points of the Curve, Surface and Multi objects in common formats such as CSV, VTK, OBJ, OFF and STL.

Visualization Component

geomdl.visualization component contains extensible and customizable classes for plotting curves and surfaces on-the-fly. The users have options to use Matplotlib and/or Plotly visualization libraries. These libraries are not automatically installed during NURBS-Python setup and left for users’ discretion.

Shapes Component

geomdl.shapes component provides an easy way to generate the most common curves and surfaces, such as circles and cylinders.


NURBS-Python is licensed under the MIT License.

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Filename, size & hash SHA256 hash help File type Python version Upload date
geomdl-4.1.0-py2.py3-none-any.whl (58.5 kB) Copy SHA256 hash SHA256 Wheel py2.py3 Jul 31, 2018
geomdl-4.1.0.tar.gz (65.3 kB) Copy SHA256 hash SHA256 Source None Jul 31, 2018

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