Experimented using the THREE.IK library with a rat skeleton for procedural animations – also had fun implementing a collider for the camera, so that the rat is always in view when there is an obstructing object.
Demo here, WASD + pointer lock 
https://codercat.tk/procedural-ik-crawler/!
Oh, wow! I think this is the first time I’ve seen IK in Three.js before. Nice work!
It’s awesome!
Can you publish source code address? I want to konw how it’s written:)
thanks @marquizzo!
@Sayid1 here is the source code
you can also check out this library three.ik , which is what I used to define the IK chains
