Motion Matching for Godot 4.3

A very simple motion matching implementation example in Godot 4.3, that allows for both strafe and non strafe movement, implemented following Dan Holden's article.

Implementation

• MMAnimationLibrary: a Resource that holds not only a list of animations, but also all the extracted features data for every frame, as well as their statistics data.
• MMFeature: an Resource that describes data used to match movement to a specific animation frame. You can find implementation examples src/features.
• MMAnimationPlayer: an animation player that supports inertialization to transition between animations. Its it also used to make queries to a MMAnimationLibrary.
• MMController: A simple 3rd person controller, that also generates trajectories used for motion matching queries.
• MotionMatcher: Coordinates fetching query information from MMController and transitioning to the resulting animation.

Todo

• Implement better debugging tools
• Use a KD Tree to accelerate queries
• Finish implementing MMBoneDataFeature
• Get more complete animation data
• Support jumping, crouching, and parkour movements

Credits

• Road to Next Gen Animation - GDC Talk
• Simon Clavet's implementation video
• Orange Duck's Blog
• Remi's Motion Matching implementation
• Demo data taken from O3DE Motion Matching Implementation