godot-cpp VS GDExtensionSummator

Write C++ classes or functions using C++ bindings for the Godot engine.

Might have sth to do with https://github.com/godotengine/godot-cpp/issues/1057 . All of these errors pop up when godot::Refs are returned by certain engine functions like the one in FastNoiseLite but objects instantiated via memnew work like a charm. Plus with more gdextensions registered these issues seem to happen at more places.

I think part of the problem is that using GDExtension is like a two-way FFI. You can call (C++) extension functions from GDScript, but the same interface and overhead are used to call (lib) Godot functions from the (C++) extension.

Here's a good example (look, there I am!), although it's a bit old and actually led to perf improvement:

https://github.com/godotengine/godot-cpp/issues/1063

I've had some performance problems with GDExtensions: https://github.com/godotengine/godot-cpp/issues/1063

I tried checking out cpp repo for my godot version 4 from this repo

godot-cpp/gdextension/gdextension_interface.h

Thanks! At the moment I've been running into issues with accessing some methods of the AudioServer as well as overriding some native functions (primarily related to audio_stream and audio_stream_player). These issues on the issue tracker cover them: https://github.com/godotengine/godot-cpp/issues/1090 https://github.com/godotengine/godot-cpp/issues/1088 That said, there may be a way around this, it could just be that different bindings need to be used - currently the audio stream and audio stream player code is heavily based on existing classes like AudioStreamPlayerPolyphonic. Worst case I believe Godot itself needs to be updated to expose the appropriate bindings. I'll upload a separate branch for what I have for the GDExtensions version (though it fails compilation) sometime soon. I started this as a traditional Godot module during the 4.0 pre-alpha days but I definitely want to move it to GDExtension so its super easy for people to pull into the official engine release.

Once you get it building correctly on your machine, you can use GitHub actions to test that it will also build on other desktops, as well as actually build the libraries needed for the extensions on those platforms. So if you're like me and using Windows, you can only build for Windows and Linux. This will build the mac libraries for you. Here's an example of a .yml file that does that. You can compare it against mine to see what I changed for my situation.

There‘s the docs and also several template projects on GitHub like mine: https://github.com/paddy-exe/GDExtensionSummator

Godot (engine and extensions) use Scons as a build system. The terminal command >scons does all the work. Without settings >scons uses reasonable defaults. GDExtensionSummator has a step-for-step guide.