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openeggbert/README.md

🥚 OpenEggbert

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

OpenEggbert is the open-source ecosystem of Robert Vokáč: a family of modern C++ projects that build on each other — 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.

🌐 openeggbert.com — ecosystem hub · 🎮 speedyblupi.com — play the games in your browser · 👤 robertvokac.com

≈312k lines of C++ across the projects below.¹

🔥 Projects

# Project What it is LOC Web / Demo
1 mesh-craft 🚩 Flagship — C++23 3D scene editor for the XML-based MC3 format: primitives, CSG booleans (Manifold), PBR materials, keyframe animation, glTF/GLB + MCB export ≈24.9k meshcraft3d.com
2 mesh-world Procedural 3D world/city generator built on Mesh Craft — 20 C++ + 17 Lua generators, SQLite content packs, real-time chunk-streaming explorer ≈12.7k meshworld3d.com
3 cna Modern C++23 reimplementation of the Microsoft XNA 4.0 API on SDL3 — pluggable backends (SDL_Renderer, OpenGL, Vulkan, bgfx) and cross-platform networking ≈76.9k libcna.com · demo
4 cna-samples C++ ports of the official Microsoft XNA Game Studio 4.0 sample collection running on CNA — web demos coming soon ≈48.0k —
5 cna-craft Minecraft-like first-person voxel-world prototype on CNA — chunk-streamed terrain, procedural generation, block breaking/placing, SQLite world persistence; in development ≈4.0k —
6 sharp-runtime Pragmatic subset of the .NET runtime (System::*) in native C++ — the foundation layer under CNA and the tools ≈64.6k docs
7 free-direct DirectX 3 (2D) compatibility layer on SDL3 — DirectDraw/DirectSound subset for legacy games ≈4.3k docs · demo
8 free-api Minimal Win32 API (circa 1998) compatibility layer on SDL3 — run legacy Windows games anywhere ≈4.4k docs
9 free-eggbert Reverse-engineered, buildable reconstruction of Speedy Eggbert 2, made portable via free-api + free-direct ≈28.1k docs · demo (partial)
10 mobile-eggbert C++ port of Speedy Blupi (2013 Windows Phone XNA game) on CNA — fully playable in the browser ≈20.5k docs · play
11 galaxy-eggbert 3D remake of Speedy Blupi / Mobile Eggbert on CNA + Easy3D ≈8.5k docs
12 easy-gl Toolkit-independent C++20 RAII wrapper over OpenGL / OpenGL ES — host owns the window and GL context ≈3.6k docs
13 easy-3d Small C++23 helper library beside CNA — cameras, texture atlas, billboard/cube batching, debug draw ≈1.0k docs
14 meta-gl Low-level type-safe C++23 wrapper for OpenGL ES 2.0+ / WebGL — runtime function loading, enum-class GL constants ≈7.8k docs
15 mobile-eggbert-legacy Legacy C#/MonoGame preservation archive of Mobile Eggbert (ILSpy-decompiled Windows Phone XNA sources) — —
16 mobile-eggbert-libgdx Java/LibGDX port of Speedy Blupi with a small XNA/.NET compatibility bridge — —
17 sprite-utils Small C++23 sprite utilities and assets (number spritesheets, web component) ≈1.2k —
18 youtube-frontend C++23 static HTML index generator for ArchiveBox video archives (OpenCV + FFmpeg) ≈1.4k web

¹ 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.

🧱 How it fits together

mesh-world   (procedural 3D worlds)
  └── mesh-craft   (3D scene editor, MC3 format)
        └── CNA   (XNA-style cross-platform framework)   ←  cna-samples · cna-craft · easy-3d
              ├── easy-gl → meta-gl   (OpenGL layers)
              └── sharp-runtime   (.NET-style foundation)

free-eggbert   (Speedy Eggbert 2 reconstruction)
  └── free-direct   (DirectX 3 subset)
        └── free-api   (Win32 subset)   — both on SDL3

games: mobile-eggbert (C++/CNA) · galaxy-eggbert (3D) · cna-craft (voxel prototype) · legacy C# / Java ports

🎮 Play in the browser

WebAssembly builds hosted at speedyblupi.com:

📫 Author

Robert Vokáč — 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 — 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 — primitives, CSG booleans, PBR materials, keyframe animation, glTF/GLB and MCB export.

    C++ 1

  6. mesh-world mesh-world Public

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

    C++