# CGAL/cgal

The public CGAL repository, see the README below

Repository: https://github.com/CGAL/cgal
Canonical: https://ross.abutalabs.com/products/cgal
Homepage: https://github.com/CGAL/cgal#readme
Language: C++
License: NOASSERTION
License Family: other
Topics: cgal, c-plus-plus, geometry, algorithms, library, cpp, template-library, geometry-processing, computational-geometry, triangulation, mesh-processing, arrange, point-cloud, boolean-operations, polygon, meshes, voronoi-diagram
Last push: 2026-08-26T16:50:15+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 88, longevity 100
- inputs: {"age_days": 4354, "days_push": 7, "days_rel": 83, "gap_med": 6.5, "n_releases_24m": 11}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6024, forks 1588 (observed 2026-08-28T04:09:34.339983+00:00)

## What it is
CGAL (Computational Geometry Algorithms Library) is a mature C++ library providing efficient and reliable algorithms for computational geometry, including triangulations, convex hulls, boolean operations, mesh processing, and arrangements. Since version 5.0 it is header-only, distributed as source tarballs released twice a year.

## Use cases
- compute convex hulls and triangulations of point sets
- perform boolean operations on polygons
- reconstruct surfaces from point clouds
- process and remesh 3D meshes
- compute Voronoi diagrams and arrangements
- implement geometric algorithms with exact arithmetic

## When to choose
- you need robust, exact-arithmetic computational geometry in C++
- you work with meshes, point clouds, or polygon processing
- you want a well-tested, long-established geometry library

## When to avoid
- you need a lightweight runtime dependency rather than a large template-heavy header library
- your project is not C++
- you need GPU-accelerated geometry processing

## Facets
- artifact type: library
- maturity: stable
- function: graphics, simulation, math, image-processing, parser
- domain: graphics, computer-vision, simulation, developer-tools
- platform: cpp, cross-platform, windows
- tags: computational-geometry, header-only, triangulation, mesh-processing, boolean-operations, voronoi-diagram, point-cloud, convex-hull, arrangements, geometry-processing, algorithms, linux, macos

## Member repositories
- CGAL/cgal (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:34.339983+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 2026-08-29T17:49:44.034129+00:00, confidence not recorded.
  - readme: https://github.com/CGAL/cgal (fetched 2026-08-28T04:09:34.339983+00:00, sha 39c6dd4833f2)
  - homepage: https://github.com/CGAL/cgal#readme (fetched 2026-08-29T08:45:31.561331+00:00, sha 784d6aaff842)
- Data as of 2026-08-30T08:39:29.467469+00:00.