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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 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‰ˆ560.5k 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‰ˆ41.2k meshcraft3d.com
2 cna Modern C++23 reimplementation of the Microsoft XNA 4.0 API on SDL3, restructured into 15 modules + a ~40-backend renderer layer โ€” 46 pluggable backends (Vulkan, bgfx, WebGPU, Direct3D 9/10/11/12, SDL_GPU, Metal, the full legacy DirectX 1โ€“9 line, desktop/mobile OpenGL/OpenGL ES/OpenVG, and more) and cross-platform networking โ‰ˆ292.2k libcna.com ยท demo
3 cna-samples C++ ports of the official Microsoft XNA Game Studio 4.0 sample collection running on CNA โ€” web demos coming soon โ‰ˆ48.0k โ€”
4 cna-craft Minecraft-like first-person voxel-world prototype on CNA, a faithful port of fogleman/Craft โ€” chunk-streamed terrain, ambient occlusion, world-editing commands, SQLite persistence, multiplayer; in development โ‰ˆ6.3k โ€”
5 sharp-runtime Pragmatic subset of the .NET runtime (System::*) in native C++, restructured into 39 modules (41 CMake components) โ€” the foundation layer under CNA and the tools โ‰ˆ78.9k docs
6 free-direct DirectX 3 (2D) compatibility layer on SDL3 โ€” DirectDraw/DirectSound subset for legacy games โ‰ˆ4.3k docs ยท demo
7 free-api Minimal Win32 API (circa 1998) compatibility layer on SDL3 โ€” run legacy Windows games anywhere โ‰ˆ4.5k 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€” the sole implementation; the prior Simple3D/U3D path was fully retired and removed from the tree on 2026-07-25 โ‰ˆ18.5k 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‰ˆ1.0k 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‰ˆ8.9k 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‰ˆ2.2k โ€”
17 youtube-frontend C++23 static HTML index generator for ArchiveBox video archives (OpenCV + FFmpeg) โ‰ˆ2.3k web

ยน LOC measured with cloc (August 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-craft   (3D scene editor, MC3 format)
  โ””โ”€โ”€ CNA   (XNA-style cross-platform framework)   โ†  cna-samples ยท cna-craft 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 cna-craft (voxel prototype) 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 46 pluggable renderers (SDL_Renderer, OpenGL, bgfx, etc.) and cross-platform networking.

    C++ 94 6

  4. 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++ 2

  5. cna-samples cna-samples Public

    C++ ports of the official Microsoft XNA Game Studio 4.0 samples, running on the CNA framework. Web demos coming soon.

    Python 5

  6. sharp-runtime sharp-runtime Public

    C++ reimplementation of a pragmatic subset of the .NET runtime (System::* types) โ€” a lightweight foundation layer for native C++ projects such as CNA.

    C++ 1

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