Integrating C++ Libraries into Godot Games Using Conan and godot-cpp 10

Godot's Extensibility with C++

Godot, a popular open-source game engine, primarily uses GDScript for game logic. However, for advanced functionalities such as simulations, databases, or machine learning runtimes, projects often require existing C or C++ libraries. GDScript cannot directly call native code, but Godot supports loading native code through GDExtension.

Leveraging godot-cpp and Conan

The official C++ bindings, godot-cpp, allow developers to expose C++ code as regular engine classes within Godot. The integration process, particularly managing builds for multiple platforms and ensuring godot-cpp version compatibility, can be complex. The release of godot-cpp 10 in ConanCenter, combined with the Conan package manager, simplifies this build process significantly.

Practical Integration Example

The guide demonstrates this integration by using the flecs Entity Component System (ECS) library to simulate 100,000 particles within a Godot scene. This example illustrates how C++ libraries can extend Godot's capabilities, making C++ code behave like any other node in the engine, complete with editable properties and GDScript compatibility.

Godot's Core Concepts

Godot projects are built around 'Nodes' and 'Scenes'. Nodes are fundamental building blocks with specific types and properties, while Scenes are trees of nodes saved as .tscn files. Behavior is typically added via GDScript attached to nodes, offering immediate feedback without a compile step. For C++ developers, Godot's C++ foundation and its ability to load C++ extensions without recompilation are key features.