Saucer Engine is a 2D Game engine made with C++11, using OpenGL 3.0 as rendering back-end. The focus on this engine was primarily for learning graphics programming, and then some low level development in general. It evolved a little bit further, with an integrated gui editor, with embedded lua profiling and scene editor (ImGui is indeed an amazing library).

It's focus is to be lightweighted and script-friendly, so you don't need to write C++ if you want, although it is simple to add custom C++ components.

I made this proof-of-concept game with Saucer. It's a chess game. It uses a custom C++ component to communicate with a external process (any chess engine executable that uses UCI protocol, like Stockfish).

Apart from heavy use of C++ STL libs, these below are all third-party dependencies:

• GLFW 3.3.2(*), for window management and graphics context.
• GLEW 2.1(*), runtime checkups and bindings for OpenGL drivers.
• libPNG 1.6.37, reading png files.
• Lua script 5.0.3, for scripting game actors and logic.
• Box2D 2.4.1(*), for physics and collisions logic.
• OpenAL-soft 1.21.0(*), for audio rendering.
• AudioFile 1.0.8(*) , for loading .wav files.
• Ogg 1.3.4(*) , for loading .OGG files.
• Vorbis 1.3.7(*), for decoding .OGG files.
• FreeType 2.10.4, for loading fonts.
• Dear ImGui 1.79(*), for graphic editor interface
• yaml-cpp 0.6.3(*), for yaml file parsing/emitting
• zlib 1.2.11, general purpose data compression library, for packaging resources and used by others libraries (libpng, freetype)

(*) - Included as a git submodule. When not included as submodule, there is a copy of the project's source code.

Currently, I'm working on building a proper release build (resource packaging). For now, you can easily build the editor executable with CMake. Don't forget to include all git submodules when cloning this repository.

Source code documentation is being created with Doxygen. (Incomplete) Also, I think a script-API (Lua bindings) would be more useful since it is the subset of C++ functions that is useful for scripting. More on that is yet to come too.

• Picking scene node objects with mouse cursor in editor mode.
• More API functions related to physics & collision (velocity, normal vector, etc)
• Networking module
• Integrate a file explorer in editor (will use boost or C++17)
• Supporting Lua to the most recent version (5.4.2).
• Imports for some popular tools (Aseprite, Tiled, OGMO, ... suggestions accepted! )