GHZMRSpace/Assets/JISuanBox.cs

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

public class JISuanBox
{
    public static void setBox(GameObject gameObject)
    {
        Transform[] children = gameObject.GetComponentsInChildren<Transform>();
        Bounds totalBounds = new Bounds();
        totalBounds.center = gameObject.transform.position;
        foreach (Transform child in children)
        {
            MeshRenderer meshFilter = child.GetComponent<MeshRenderer>();
            if (meshFilter != null)
            {
                totalBounds.Encapsulate(meshFilter.bounds);
            }
        }

        Vector3 totalSize = totalBounds.size;

        BoxCollider box = gameObject.GetComponent<BoxCollider>();
        if (box == null)
        {
            box = gameObject.AddComponent<BoxCollider>();
        }
        box.size = totalSize / gameObject.transform.localScale.x;
        box.center = gameObject.transform.InverseTransformPoint(totalBounds.center);
    }
}