# rbfx/rbfx

Lightweight Game Engine/Framework in C++17 with WYSIWYG Editor. Experimental C# bindings.

Repository: https://github.com/rbfx/rbfx
Canonical: https://ross.abutalabs.com/products/rbfx
Homepage: https://rebelfork.io
Language: C++
License: MIT
License Family: permissive
Topics: game-engine, 3d-engine, urho3d, csharp, imgui, hot-reload, 3d-graphics, cpp17, desktop, directx-11, mobile, opengl, web
Last push: 2026-08-25T12:15:25+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 3818, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1033, forks 171 (observed 2026-08-28T04:03:18.535626+00:00)

## What it is
Rebel Fork (rbfx) is an experimental MIT-licensed fork of the Urho3D game engine, providing a lightweight, modular C++17 framework for building 3D games and applications with a WYSIWYG editor and optional C# bindings. It targets Windows, Linux, macOS, Android, iOS, Web, and Xbox (via UWP) and is under active development with an unstable C++ API.

## Use cases
- build a 3d game in c++ without a heavyweight engine
- migrate an existing urho3d project to a more feature-rich fork
- create a cross-platform game that runs on desktop, mobile, and web
- prototype 3d scenes with a wysiwyg editor and hot reload
- embed a lightweight 3d engine as a library dependency in a c++ application

## When to choose
- you are a C++ or C# developer who wants code-first control over the engine
- you like Urho3D but need more features or active development
- you want a portable, lightweight engine usable as a third-party dependency
- you target many platforms including web and mobile from one codebase

## When to avoid
- you want a no-code or scripting-heavy workflow like Unity with an asset store
- you need cutting-edge AAA graphics or technology like Unreal Engine
- you are happy with vanilla Urho3D
- you need a stable, released API - the C++ API is still changing

## Facets
- artifact type: framework
- maturity: active
- function: game-engine, graphics, ui-components
- domain: cross-platform, graphics
- platform: windows, cpp, dotnet
- tags: urho3d-fork, wysiwyg-editor, imgui, hot-reload, directx-11, opengl, 3d-graphics, code-first, game-development, linux, macos, android, ios, web-server

## Member repositories
- rbfx/rbfx (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:18.535626+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 2026-08-30T07:06:41.359169+00:00, confidence not recorded.
  - readme: https://github.com/rbfx/rbfx (fetched 2026-08-28T04:03:18.535626+00:00, sha 4988aed234dd)
  - homepage: https://rebelfork.io (fetched 2026-08-29T13:06:17.931261+00:00, sha b3ce796f1845)
  - site_page: https://rebelfork.io/docs/index.html (fetched 2026-08-29T13:06:17.933741+00:00, sha 17874c36f1f0)
- Data as of 2026-08-30T08:39:29.467469+00:00.