[VRC] シーン内のアバターをボタンで切り替えるUnityEditor拡張(ボタンを押したアバターだけを表示)

ToggleAvatar.cs

using UnityEngine;
using UnityEditor;
using System.Collections.Generic;
using System.Linq;
using VRC.SDKBase;
using UnityEngine.SceneManagement;

#if UNITY_EDITOR

public class ToggleAvatar : EditorWindow
{
    [SerializeField] GameObject showingAvatar;
    private Vector2 _scrollPosition = Vector2.zero;


    [MenuItem("Tools/ToggleAvatar")]
    public static void ShowWindow()
    {
        GetWindow<ToggleAvatar>("Toggle Avatar");
    }

    void OnGUI()
    {
        _scrollPosition = EditorGUILayout.BeginScrollView(_scrollPosition);

        var avatars = FindRootObjectsByType<VRC_AvatarDescriptor>();
        var toggleObjects = avatars.Select(a => a.gameObject).ToArray();

        if (toggleObjects.Length <= 0)
            EditorGUILayout.LabelField("No avatars on this scene.");
        else
        {
            if (showingAvatar == null && Selection.activeGameObject != null && Selection.activeGameObject.GetComponent<VRC_AvatarDescriptor>() != null)
                showingAvatar = Selection.activeGameObject; // already selected avatar

            GUIStyle selectedStyle = new GUIStyle(GUI.skin.button);
            selectedStyle.fontStyle = FontStyle.Bold;
            selectedStyle.alignment = TextAnchor.MiddleLeft;
            selectedStyle.padding = new RectOffset(15, 15, 3, 3);
            GUIStyle noneStyle = new GUIStyle(GUI.skin.button);
            noneStyle.alignment = TextAnchor.MiddleLeft;
            noneStyle.padding = new RectOffset(10, 10, 3, 3);


            foreach (var obj in toggleObjects)
            {
                if (GUILayout.Button(obj.name, style: showingAvatar == obj ? selectedStyle : noneStyle)) {
                    ShowOnly(obj, toggleObjects);
                }
            }
        }
        EditorGUILayout.EndScrollView();
    }

    void ShowOnly(GameObject selected, IEnumerable<GameObject> objects)
    {
        showingAvatar = selected;
        foreach (var obj in objects)
            obj.SetActive(obj == selected);
    }

    IEnumerable<GameObject> FindRootObjectsByType<T>() where T: Component{
        var currentScene = SceneManager.GetActiveScene();
        var rootObjects = currentScene.GetRootGameObjects();
        foreach(var obj in rootObjects) {
            T component = obj.GetComponent<T>();
            if(component==null) continue;
            yield return obj;
        }
    }
}
#endif