PacManUdon/Assets/Scripts/Editor/ResetParentTransform.cs

using UnityEngine;
using UnityEditor;
using System.Collections.Generic;

public class ResetParentTransform : EditorWindow
{
    [MenuItem("Tools/Reset Parent Transform")]
    public static void ShowWindow()
    {
        GetWindow<ResetParentTransform>("Reset Parent Transform");
    }

    private void OnGUI()
    {
        GUILayout.Label("Reset Parent Transform", EditorStyles.boldLabel);

        if (GUILayout.Button("Reset Transform for Selected Parent and Adjust Children"))
        {
            ResetTransform();
        }
    }

    private void ResetTransform()
    {
        if (Selection.activeGameObject == null)
        {
            Debug.LogWarning("No GameObject selected. Please select a GameObject in the hierarchy.");
            return;
        }

        Transform parentTransform = Selection.activeGameObject.transform;

        if (parentTransform.childCount == 0)
        {
            Debug.LogWarning("Selected GameObject has no children. Operation aborted.");
            return;
        }

        List<Transform> children = new List<Transform>();
        foreach (Transform child in parentTransform)
        {
            children.Add(child);
        }

        foreach (Transform child in children)
        {
            child.transform.parent = null;
        }

        // Reset the parent's transform to default values
        parentTransform.localPosition = Vector3.zero;
        parentTransform.localRotation = Quaternion.identity;
        parentTransform.localScale = Vector3.one;

        foreach (Transform child in children)
        {
            child.transform.parent = parentTransform;
        }

        Debug.Log("Parent transform reset and children adjusted.");
    }
}