# PixarAnimationStudios/OpenSubdiv

An Open-Source subdivision surface library.

Repository: https://github.com/PixarAnimationStudios/OpenSubdiv
Canonical: https://ross.abutalabs.com/products/opensubdiv
Homepage: https://www.opensubdiv.org
Language: C++
License: NOASSERTION
License Family: other
Last push: 2026-08-19T04:13:38+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 35, longevity 100
- inputs: {"age_days": 5245, "days_push": 14, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3070, forks 585 (observed 2026-08-28T04:07:41.550333+00:00)

## What it is
OpenSubdiv is a set of open-source C++ libraries implementing high-performance subdivision surface evaluation on massively parallel CPU and GPU architectures, developed by Pixar. It is an API intended for integration into third-party 3D content creation tools, not a standalone application.

## Use cases
- evaluate subdivision surfaces on GPU at interactive framerates
- integrate Pixar-quality subdiv surfaces into a 3D modeling tool
- render smooth deforming character meshes with static topology
- match RenderMan limit surfaces to numerical precision
- accelerate mesh subdivision in a game engine or renderer

## When to choose
- you need production-grade subdivision surface evaluation in C++
- you want GPU-accelerated deforming mesh evaluation
- you need Pixar-compatible limit surfaces in your DCC tool or renderer

## When to avoid
- you need a standalone 3D modeling application
- your project is not C++ or cannot integrate a native library
- you only need simple polygon tessellation without subdivision

## Facets
- artifact type: library
- maturity: stable
- function: graphics, simulation, gpu-computing
- domain: graphics, cross-platform
- platform: cpp, windows
- tags: subdivision-surfaces, 3d-graphics, mesh-evaluation, renderman, pixar, game-development, linux, macos, gpu

## Member repositories
- PixarAnimationStudios/OpenSubdiv (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:41.550333+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 2026-08-30T07:28:02.323759+00:00, confidence not recorded.
  - readme: https://github.com/PixarAnimationStudios/OpenSubdiv (fetched 2026-08-28T04:07:41.550333+00:00, sha b3db37702b61)
  - homepage: https://www.opensubdiv.org (fetched 2026-08-29T09:43:25.180107+00:00, sha c26130123f21)
  - site_page: https://opensubdiv.org/docs/intro.html (fetched 2026-08-29T09:43:25.183734+00:00, sha 23adf340036d)
  - site_page: https://www.opensubdiv.org/docs/intro.html (fetched 2026-08-29T09:43:25.185804+00:00, sha 23adf340036d)
- Data as of 2026-08-30T08:39:29.467469+00:00.