base on C++ bindings for the Godot script API # godot-cpp > [!WARNING] > > This repository's `master` branch is only usable with > [GDExtension](https://godotengine.org/article/introducing-gd-extensions) > from Godot's `master` branch. > > For users of stable branches, switch to the branch matching your target Godot version: > - [`4.2`](https://github.com/godotengine/godot-cpp/tree/4.2) > - [`4.1`](https://github.com/godotengine/godot-cpp/tree/4.1) > - [`4.0`](https://github.com/godotengine/godot-cpp/tree/4.0) > > Or check out the Git tag matching your Godot version (e.g. `godot-4.1.1-stable`). > > For GDNative users (Godot 3.x), switch to the [`3.x`](https://github.com/godotengine/godot-cpp/tree/3.x) > or the [`3.5`](https://github.com/godotengine/godot-cpp/tree/3.5) branch. This repository contains the *C++ bindings* for the [**Godot Engine**](https://github.com/godotengine/godot)'s GDExtensions API. - [**Versioning**](#versioning) - [**Compatibility**](#compatibility) - [**Contributing**](#contributing) - [**Getting started**](#getting-started) - [**Examples and templates**](#examples-and-templates) ## Versioning This repositories follows the same branch versioning as the main [Godot Engine repository](https://github.com/godotengine/godot): - `master` tracks the current GDExtension development branch for the next Godot 4.x minor release. - `3.x` tracks the development of the GDNative plugin for the next 3.x minor release. - Other versioned branches (e.g. `4.0`, `3.5`) track the latest stable release in the corresponding branch. Stable releases are also tagged on this repository: [**Tags**](https://github.com/godotengine/godot-cpp/tags). **For any project built against a stable release of Godot, we recommend using this repository as a Git submodule, checking out the specific tag matching your Godot version.** > As the `master` branch of Godot is constantly getting updated, if you are > using `godot-cpp` against a more current version of Godot, see the instructions > in the `gdextension` folder to update the relevant files. ## Compatibility > [!WARNING] > > The GDExtension API is brand new in Godot 4.0, and is still considered in **beta** stage, despite Godot 4.0 itself being released. > > This applies to both the GDExtension interface header, the API JSON, and this first-party `godot-cpp` extension. > > Some compatibility breakage is to be expected as GDExtension and `godot-cpp` > get more used, documented, and critical issues get resolved. See the > [Godot issue tracker](https://github.com/godotengine/godot/issues?q=is%3Aissue+is%3Aopen+label%3Atopic%3Agdextension) > and the [godot-cpp issue tracker](https://github.com/godotengine/godot-cpp/issues) > for a list of known issues, and be sure to provide feedback on issues and PRs > which affect your use of this extension. ## Contributing We greatly appreciate help in maintaining and extending this project. If you wish to help out, ensure you have an account on GitHub and create a "fork" of this repository. See [Pull request workflow](https://docs.godotengine.org/en/stable/community/contributing/pr_workflow.html) for instructions. Please install clang-format and copy the files in `misc/hooks` into `.git/hooks` so formatting is done before your changes are submitted. ## Getting started You need the same C++ pre-requisites installed that are required for the `godot` repository. Follow the [official build instructions for your target platform](https://docs.godotengine.org/en/latest/contributing/development/compiling/index.html#building-for-target-platforms). Getting started with GDExtensions is a bit similar to what it was for 3.x but also a bit different. This new approach is much more akin to how core Godot modules are structured. Compiling this repository generates a static library to be linked with your shared lib, just like before. To use the shared lib in your Godot project you'll need a `.gdextension` file, which replaces what was the `.gdnlib` before. See [example.gdextension](test/project/example.gdextension) used in the test project: ```ini [configuration] entry_symbol = "example_library_init" compatibility_minimum = "4.1" [libraries] macos.debug = "res://bin/libgdexample.macos.debug.framework" macos.release = "res://bin/libgdexample.macos.release.framework" windows.debug.x86_64 = "res://bin/libgdexample.windows.debug.x86_64.dll" windows.release.x86_64 = "res://bin/libgdexample.windows.release.x86_64.dll" linux.debug.x86_64 = "res://bin/libgdexample.linux.debug.x86_64.so" linux.release.x86_64 = "res://bin/libgdexample.linux.release.x86_64.so" # Repeat for other architectures to support arm64, rv64, etc. ``` The `entry_symbol` is the name of the function that initializes your library. It should be similar to following layout: ```cpp extern "C" { // Initialization. GDExtensionBool GDE_EXPORT example_library_init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) { godot::GDExtensionBinding::InitObject init_obj(p_get_proc_address, p_library, r_initialization); init_obj.register_initializer(initialize_example_module); init_obj.register_terminator(uninitialize_example_module); init_obj.set_minimum_library_initialization_level(MODULE_INITIALIZATION_LEVEL_SCENE); return init_obj.init(); } } ``` The `initialize_example_module()` should register the classes in ClassDB, very like a Godot module would do. ```cpp using namespace godot; void initialize_example_module(ModuleInitializationLevel p_level) { if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) { return; } GDREGISTER_CLASS(Example); } ``` Any node and resource you register will be available in the corresponding `Create...` dialog. Any class will be available to scripting as well. ## Examples and templates See the [godot-cpp-template](https://github.com/godotengine/godot-cpp-template) project for a generic reusable template. Or checkout the code for the [Summator example](https://github.com/paddy-exe/GDExtensionSummator) as shown in the [official documentation](https://docs.godotengine.org/en/latest/tutorials/scripting/gdextension/gdextension_cpp_example.html). ", Assign "at most 3 tags" to the expected json: {"id":"1474","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"