MotionCapture/Assets/Behaviours/BoneBehaviour.cs

using System.Collections.Generic;
using Models;
using UnityEngine;
using Utils.PoseTransformHandlers;

namespace Behaviours
{
    public class BoneBehaviour : MonoBehaviour
    {
        private readonly UdpListener _listener = new UdpListener();
        private readonly PoseTransform[] _transforms = new PoseTransform[PoseLandmarkType.MaxValue];
    
        private Animator _animator;

        private void Start()
        {
            _animator = GetComponent<Animator>();

            for (var i = 0; i < PoseLandmarkType.MaxValue; i++)
            {
                _transforms[i] = new PoseTransform(i, new ZAxisHandler());
            }
        
            _listener.AddHandler(OnReceive);
            _listener.Connect(5000);
        }

        private void Update()
        {
            var frontLeft = Vector3.Cross(
                _transforms[PoseLandmarkType.RightHip] - _transforms[PoseLandmarkType.LeftHip],
                _transforms[PoseLandmarkType.RightShoulder] - _transforms[PoseLandmarkType.LeftHip]);

            var frontRight = Vector3.Cross(
                _transforms[PoseLandmarkType.LeftShoulder] - _transforms[PoseLandmarkType.RightHip],
                _transforms[PoseLandmarkType.LeftHip] - _transforms[PoseLandmarkType.RightHip]);

            var front = frontLeft + frontRight;
            front.Normalize();

            _animator.GetBoneTransform(HumanBodyBones.Hips).rotation = Quaternion.LookRotation(front);
        }

        private void OnDisable()
        {
            _listener.DisConnect();
        }

        private void OnReceive(List<PoseLandmark> landmarks)
        {
            foreach (var landmark in landmarks)
            {
                PoseTransform.UpdatePosition(ref _transforms[landmark.Type.Value], landmark);
            }
        }
    }
}