cpp_bindings

C++ bindings for the Godot script API

Creating a GDNative library (Linux)

Create a director named SimpleLibrary with subdirector lib, src

Getting latest cpp_bindings and godot_headers

$ cd SimpleLibrary
$ git clone https://github.com/GodotNativeTools/cpp_bindings
$ git clone https://github.com/GodotNativeTools/godot_headers

right now our file structure should look like this

[SimpleLibrary]
	├── cpp_bindings/
	├── godot_headers/
	├── lib/
	└── src/

Now to generate cpp bindings

$ cd cpp_bindings

Edit SConstruct file and assign your godot executable path at line:7 godot_bin_path = "../godot_fork/bin/",

Building core/bindings, (libgodot_cpp_core.so , libgodot_cpp_bindings.so)

$ scons p=linux
$ scons p=linux target=bindings generate_bindings=yes

resulting libraries will be placed under bin/ and generated bindings will be found under includes/*

Note: Use use_llvm=yes to use clang.

copy Core && Bindings librarys into SimpleLibrary/lib folder

$ cd ..
$ cp cpp_bindings/bin/libgodot_cpp_core.so lib/
$ cp cpp_bindings/bin/libgodot_cpp_bindings.so lib/

And our file structure will be

[SimpleLibrary]
  ├── cpp_bindings/
  ├── godot_headers/
  ├── lib/
  │       ├── libgodot_cpp_core.so
  │       ├── libgodot_cpp_bindings.so
  └── src/

Creating simple class

Create init.cpp under SimpleLibrary/src/ and add the following code

#include <godot.h>

#include <core/Godot.hpp>
#include <core/GodotGlobal.hpp>
#include <Reference.hpp>

using namespace godot;

class SimpleClass : public GodotScript<Reference> {
        GODOT_CLASS(SimpleClass);
public:
        SimpleClass() { }

        void test_void_method() {
                Godot::print("This is test");
        }

        Variant method(Variant arg) {
            Variant ret;
            ret = arg;

            return ret;
        }

        static void _register_methods() {
           register_method("method", &SimpleClass::method);
        }
};

GODOT_NATIVE_INIT(godot_native_init_options *options) {
        register_class<SimpleClass>();
}

Compiling

$ cd ..
$ clang -fPIC -o src/init.os -c src/init.cpp -g -O3 -std=c++14 -Icpp_bindings/include -Igodot_headers -Icpp_bindings/include/core
$ clang -o lib/libtest.so -shared src/init.os -Llib -lgodot_cpp_core -lgodot_cpp_bindings

This creates the file libtest.so in your SimpleLibrary/lib directory. For windows you need to find out what compiler flags need to be used.

Creating .gdn file

follow godot_header/README.md file to create the .gdn

Implementing with gdscript

var simpleclass = load("res://simpleclass.gdn").new();
simpleclass.method("Test argument");