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openeggbert/README.md

๐Ÿฅš OpenEggbert

Open-source C++ game technology โ€” 3D tooling, an XNA-style framework, compatibility layers, and game preservation.

OpenEggbert is the open-source ecosystem of Robert Vokรกฤ: a family of modern C++ projects that build on each other โ€” from a .NET-style runtime, through an XNA-style cross-platform framework, up to a 3D scene editor, a procedural world generator, and playable game ports targeting Windows, Linux, WebAssembly, and Android.

๐ŸŒ openeggbert.com โ€” ecosystem hub ยท ๐ŸŽฎ speedyblupi.com โ€” play the games in your browser ยท ๐Ÿ‘ค robertvokac.com

โ‰ˆ231k lines of C++ across the projects below.ยน

๐Ÿ”ฅ Projects

# Project What it is LOC Web / Demo
1 mesh-craft ๐Ÿšฉ Flagship โ€” C++23 3D scene editor for the XML-based MC3 format: primitives, CSG booleans (Manifold), PBR materials, keyframe animation, glTF/GLB + MCB export โ‰ˆ16.5k meshcraft3d.com
2 mesh-world Procedural 3D world/city generator built on Mesh Craft โ€” 20 C++ + 17 Lua generators, SQLite content packs, real-time chunk-streaming explorer โ‰ˆ8.6k meshworld3d.com
3 cna Modern C++23 reimplementation of the Microsoft XNA 4.0 API on SDL3 โ€” pluggable backends (SDL_Renderer, OpenGL, bgfx) and cross-platform networking โ‰ˆ61.5k libcna.com ยท demo
4 cna-samples C++ ports of the official Microsoft XNA Game Studio 4.0 sample collection running on CNA โ€” web demos coming soon โ‰ˆ32.3k โ€”
5 sharp-runtime Pragmatic subset of the .NET runtime (System::*) in native C++ โ€” the foundation layer under CNA and the tools โ‰ˆ36.4k docs
6 free-direct DirectX 3 (2D) compatibility layer on SDL3 โ€” DirectDraw/DirectSound subset for legacy games โ‰ˆ3.2k docs ยท demo
7 free-api Minimal Win32 API (circa 1998) compatibility layer on SDL3 โ€” run legacy Windows games anywhere โ‰ˆ4.1k docs
8 free-eggbert Reverse-engineered, buildable reconstruction of Speedy Eggbert 2, made portable via free-api + free-direct โ‰ˆ28.1k docs ยท demo (partial)
9 mobile-eggbert C++ port of Speedy Blupi (2013 Windows Phone XNA game) on CNA โ€” fully playable in the browser โ‰ˆ20.5k docs ยท play
10 galaxy-eggbert 3D remake of Speedy Blupi / Mobile Eggbert on CNA + Easy3D โ‰ˆ5.4k docs
11 easy-gl Toolkit-independent C++20 RAII wrapper over OpenGL / OpenGL ES โ€” host owns the window and GL context โ‰ˆ3.6k docs
12 easy-3d Small C++23 helper library beside CNA โ€” cameras, texture atlas, billboard/cube batching, debug draw โ‰ˆ0.7k docs
13 meta-gl Low-level type-safe C++23 wrapper for OpenGL ES 2.0+ / WebGL โ€” runtime function loading, enum-class GL constants โ‰ˆ7.8k docs
14 mobile-eggbert-legacy Legacy C#/MonoGame preservation archive of Mobile Eggbert (ILSpy-decompiled Windows Phone XNA sources) โ€” โ€”
15 mobile-eggbert-libgdx Java/LibGDX port of Speedy Blupi with a small XNA/.NET compatibility bridge โ€” โ€”
16 sprite-utils Small C++23 sprite utilities and assets (number spritesheets, web component) โ‰ˆ1.2k โ€”
17 youtube-frontend C++23 static HTML index generator for ArchiveBox video archives (OpenCV + FFmpeg) โ‰ˆ1.4k web

ยน LOC measured with cloc (July 2026): C++ sources and headers (.cpp/.hpp/.h), src/ and include/ directories only, excluding tests, vendored, and third-party code.

๐Ÿงฑ How it fits together

mesh-world   (procedural 3D worlds)
  โ””โ”€โ”€ mesh-craft   (3D scene editor, MC3 format)
        โ””โ”€โ”€ CNA   (XNA-style cross-platform framework)   โ†  cna-samples ยท easy-3d
              โ”œโ”€โ”€ easy-gl โ†’ meta-gl   (OpenGL layers)
              โ””โ”€โ”€ sharp-runtime   (.NET-style foundation)

free-eggbert   (Speedy Eggbert 2 reconstruction)
  โ””โ”€โ”€ free-direct   (DirectX 3 subset)
        โ””โ”€โ”€ free-api   (Win32 subset)   โ€” both on SDL3

games: mobile-eggbert (C++/CNA) ยท galaxy-eggbert (3D) ยท legacy C# / Java ports

๐ŸŽฎ Play in the browser

WebAssembly builds hosted at speedyblupi.com:

  • Speedy Blupi 2013 โ€” fully playable, with save persistence (Mobile Eggbert on CNA)
  • Speedy Eggbert 2 โ€” partially playable (Free Eggbert on free-api + free-direct)
  • Planet Blupi โ€” the official open-source Blupi game

๐Ÿ“ซ Author

Robert Vokรกฤ โ€” Prague, Czech Republic

Pinned Loading

  1. mobile-eggbert mobile-eggbert Public

    C++ port of Speedy Blupi (2013 Windows Phone XNA game) on the CNA framework โ€” desktop, Android, and web (playable at speedyblupi.com).v

    C++

  2. free-eggbert free-eggbert Public

    Forked from jummy0/sb2-decomp

    A work-in-progress decompilation of the 1998 platforming game Speedy Blupi (Speedy Eggbert) and its 2001 sequel.

    C++ 1 2

  3. cna cna Public

    Modern C++23 reimplementation of the Microsoft XNA 4.0 API on SDL3, with pluggable rendering backends (SDL_Renderer, OpenGL, bgfx) and cross-platform networking.

    C++ 1

  4. galaxy-eggbert galaxy-eggbert Public

    3D remake of Speedy Blupi / Mobile Eggbert, moving from Urho3D toward a native CNA + Easy3D engine.

    C++

  5. mesh-craft mesh-craft Public

    C++23 3D scene editor for the XML-based MC3 format โ€” primitives, CSG booleans, PBR materials, keyframe animation, glTF/GLB and MCB export.

    C++

  6. mesh-world mesh-world Public

    Procedural 3D world and city generator built on Mesh Craft โ€” C++ and Lua chunk generators emitting MC3 scenes, plus a real-time chunk-streaming explorer.

    C++