flux VS spine-runtimes

Concratz on the game, Flux also has tweening it might do what you descibed above: https://github.com/rxi/flux

Perhaps a bit off topic but certainly a useful library when trying to do some specific movement of objects: https://github.com/rxi/flux/

Flux for Lua (visualization)

flux is a tweening library for Lua. It's great, but sometimes it's hard to guess what the curves will look like.

I find the libraries by rxi (like flux) are pretty great. How have you discovered yours? Searching GitHub, using love2d-awesome, love2d forums?

There are a bunch of programs that use rigged and meshed 2D images that create these sorts of animations. I have only used “Spline” for game animation http://esotericsoftware.com/

We're using Spine2D http://esotericsoftware.com/ It's really great

It’s rigged 2d animation. Look into spine. http://esotericsoftware.com

That's easy. Spine Pro.

You may have to learn spine separately from their tutorials and then figure out the godot integration from their sample projects: https://github.com/EsotericSoftware/spine-runtimes/tree/4.1/spine-godot/example

From the first glance it seems like Spine provides their libraries in source format (under non open source license) with pure C++, C# and TS implementations that don't depend on binary blobs (at least it seemed like it). You can find it here https://github.com/esotericsoftware/spine-runtimes . Even if C++ version is not safe, C# and TS versions are probably fine and, and the license mentions creating derivative works (assuming you follow the Editor license terms and some of invovled parties have an editor license) so you are probably allowed to create modified library which processes the files safely.

For example Spine: http://esotericsoftware.com/