# tpaviot/pythonocc-core

Python package for 3D geometry CAD/BIM/CAM

Repository: https://github.com/tpaviot/pythonocc-core
Canonical: https://ross.abutalabs.com/products/pythonocc-core
Language: SWIG
License: LGPL-3.0
License Family: copyleft
Topics: 3d, cad, python, webgl, computer-aided-design, computer-aided-manufacturing, opencascade, pythonocc-core
Last push: 2026-06-25T02:04:48+00:00

## Health v2 (maintenance only)
Score: 74/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 89, release rhythm 39, longevity 100
- inputs: {"age_days": 4391, "days_push": 70, "days_rel": 198, "gap_med": 214.0, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1955, forks 408 (observed 2026-08-28T04:05:58.958075+00:00)

## What it is
pythonocc-core is a Python package providing 3D modeling and data exchange features based on the OpenCascade Technology (OCCT) CAD kernel. It exposes nearly all OpenCascade C++ classes to Python, with 3D visualization in desktop GUIs, web browsers, and Jupyter notebooks.

## Use cases
- create and manipulate 3D CAD models in Python
- convert STEP/IGES/STL files to OBJ or GLTF
- build BIM or PLM applications with a 3D modeling kernel
- visualize 3D geometry in a Jupyter notebook
- compute inertia and topology properties of 3D shapes
- render 3D models in a web browser with threejs or x3dom

## When to choose
- you need programmatic 3D CAD modeling in Python
- you must exchange geometry between STEP, IGES, STL, PLY, OBJ, or GLTF formats
- you want OpenCascade's kernel without writing C++
- you need 3D visualization in desktop GUIs, browsers, or notebooks

## When to avoid
- you only need lightweight mesh viewing without solid modeling
- you need a GUI CAD application rather than a Python library
- your project cannot use LGPL-licensed dependencies

## Facets
- artifact type: library
- maturity: active
- function: graphics, simulation, image-processing, sdk
- domain: computer-vision, graphics, developer-tools, cross-platform
- platform: python, cross-platform, windows
- tags: cad, bim, cam, opencascade, 3d-modeling, step, iges, stl, threejs, jupyter, geometry, linux, macos

## Member repositories
- tpaviot/pythonocc-core (main) score 74

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:58.958075+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:06:30.914866+00:00, confidence not recorded.
  - readme: https://github.com/tpaviot/pythonocc-core (fetched 2026-08-28T04:05:58.958075+00:00, sha a07978889a22)
- Data as of 2026-08-30T08:39:29.467469+00:00.