zombie_mp/Assets/Scripts/RigSync.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using EasyButtons;

public class RigSync : MonoBehaviour
{
    public Transform targetRootBone;
    public Transform sourceRootBone;
    [SerializeField]public List<TransformDic> boneDic;
    
    [Button]
    void CalculateDic()
    {
        boneDic = new List<TransformDic>();

        foreach(Transform target in targetRootBone.GetComponentsInChildren<Transform>()){
            foreach(Transform souce in sourceRootBone.GetComponentsInChildren<Transform>()){
                if(target.name == souce.name){
                    boneDic.Add(new TransformDic(souce, target));
                    break;
                }
            }
        }
    }

    // Update is called once per frame
    void LateUpdate()
    {
        foreach(TransformDic bonePair in boneDic){
            bonePair.value.position = Vector3.Lerp(bonePair.value.position, bonePair.key.position + bonePair.offset, 0.1f);
           // bonePair.value.rotation = Quaternion.Lerp(bonePair.value.rotation, bonePair.key.rotation, 0.1f);
           bonePair.value.rotation = bonePair.key.rotation;
        }
    }
}

[Serializable]
public class TransformDic{
    public string name;
    public Transform key;
    public Transform value;
    public Vector3 offset;

    public TransformDic(){
        key = null;
        value=null;
    }
    public TransformDic(Transform _key, Transform _value){
        name = _key.name;
        key=_key;
        value=_value;
        offset=_value.position - _key.position;
    }
}