HierarchyRecorder.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEditor.Experimental.Animations;
 
public class HierarchyRecorder : MonoBehaviour
{
    // The clip the recording is going to be saved to.
    public AnimationClip clip;
 
    // Checkbox to start/stop the recording.
    public bool record = false;
 
    // The main feature: the actual recorder.
    private GameObjectRecorder m_Recorder;
 
    void Start()
    {
        // Create the GameObjectRecorder.
        m_Recorder = new GameObjectRecorder();
        m_Recorder.root = gameObject;
 
        // Set it up to record the transforms recursively.
        m_Recorder.BindComponent<Transform>(gameObject, true);
    }
 
    // The recording needs to be done in LateUpdate in order
    // to be done once everything has been updated
    // (animations, physics, scripts, etc.).
    void LateUpdate()
    {
        if (clip == null)
            return;
     
        if (record)
        {
            // As long as "record" is on: take a snapshot.
            m_Recorder.TakeSnapshot(Time.deltaTime);
        }
        else if (m_Recorder.isRecording)
        {
            // "record" is off, but we were recording:
            // save to clip and clear recording.
            m_Recorder.SaveToClip(clip);
            m_Recorder.ResetRecording();
        }
    }
}