# orangeduck/Corange

Pure C Game Engine

Repository: https://github.com/orangeduck/Corange
Canonical: https://ross.abutalabs.com/products/corange
Homepage: http://www.youtube.com/watch?v=482GxqTWXtA
Language: C
License: NOASSERTION
License Family: other
Last push: 2024-06-03T11:56:44+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": 5601, "days_push": 821, "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 1987, forks 212 (observed 2026-08-28T04:06:02.847197+00:00)

## What it is
Corange is a pure C game engine built on SDL and OpenGL, providing asset, entity, and UI management plus a modern deferred renderer. It serves as a platform for graphics techniques like shadow mapping, SSAO, skeletal animation, and terrain rendering.

## Use cases
- build a game engine in pure C
- learn deferred rendering with OpenGL
- experiment with skeletal animation and inverse kinematics
- render terrain and sea surfaces with shaders
- write a small platformer game in C
- try OpenCL/OpenGL interop for metaballs

## When to choose
- you want a lightweight C-based engine to learn graphics programming
- you prefer writing your own 2D renderer and game logic
- you want readable source for techniques like SSAO, shadow mapping, and tessellation

## When to avoid
- you need out-of-the-box, plug-and-play engine features
- you want a built-in 2D renderer or full editor tooling
- you need a production-ready engine with active community support

## Facets
- artifact type: framework
- maturity: maintenance
- function: game-engine, graphics, image-processing, audio-processing, simulation
- domain: graphics, cross-platform
- platform: windows, cross-platform, cpp
- tags: pure-c, opengl, sdl2, deferred-rendering, opencl, skeletal-animation, terrain, collision-detection, game-development, linux, macos

## Member repositories
- orangeduck/Corange (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:02.847197+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 2026-08-30T03:03:01.273445+00:00, confidence not recorded.
  - readme: https://github.com/orangeduck/Corange (fetched 2026-08-28T04:06:02.847197+00:00, sha 49814adc4683)
  - homepage: http://www.youtube.com/watch?v=482GxqTWXtA (fetched 2026-08-29T10:42:47.952221+00:00, sha edcd019cc9fc)
- Data as of 2026-08-30T08:39:29.467469+00:00.