# jpcy/xatlas

Mesh parameterization / UV unwrapping library

Repository: https://github.com/jpcy/xatlas
Canonical: https://ross.abutalabs.com/products/xatlas
Language: C++
License: MIT
License Family: permissive
Topics: mesh, parameterization, lightmap, texture-atlas, uv
Last push: 2024-06-16T22:20:33+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2975, "days_push": 808, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2547, forks 274 (observed 2026-08-28T04:07:00.301030+00:00)

## What it is
xatlas is a small C++11 library with no external dependencies that generates unique texture coordinates (UV unwrapping) for 3D meshes. It is an independent fork of thekla_atlas, used for baking lightmaps and texture painting.

## Use cases
- generate UV coordinates for 3D meshes
- create texture atlases for baking lightmaps
- unwrap meshes for texture painting
- parameterize charts of a 3D model
- prepare game assets for lightmap baking
- pack mesh charts into a texture atlas

## When to choose
- you need UV unwrapping in a C++ application with no external dependencies
- you are baking lightmaps or generating texture atlases for game engines
- you want a proven library descended from thekla_atlas used in The Witness
- you need a simple three-step API (create, add meshes, generate)

## When to avoid
- you need interactive UV editing in a DCC tool rather than automated unwrapping
- you need a GPU-accelerated or highly parallel solution
- you need bindings for languages other than C++ or Python without writing your own

## Facets
- artifact type: library
- maturity: stable
- function: graphics, image-processing, math
- domain: graphics, computer-vision
- platform: cpp, cross-platform, python
- tags: uv-unwrapping, mesh-parameterization, texture-atlas, lightmap-baking, 3d-graphics, game-development

## Member repositories
- jpcy/xatlas (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:00.301030+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 2026-08-30T02:24:34.796095+00:00, confidence not recorded.
  - readme: https://github.com/jpcy/xatlas (fetched 2026-08-28T04:07:00.301030+00:00, sha f9b8f2153030)
- Data as of 2026-08-30T08:39:29.467469+00:00.