PlayMakerのVariablesのArray<Texture>に、指定ディレクトリ以下のテクスチャアセットを一括セットするエディタスクリプト

FsmArraySetter.cs

#if PLAYMAKER
using System;
using System.Linq;
using HutongGames.PlayMaker;
using HutongGames.PlayMakerEditor;
using UnityEngine;
using UnityEditor;

public static class FsmArraySetter
{
    [MenuItem("CONTEXT/PlayMakerFSM/Texture Array Set")]
    private static void Foo2(MenuCommand menuCommand)
    {
        var fsm = menuCommand.context as PlayMakerFSM;
        
        var arrayVariables = fsm.FsmVariables.ArrayVariables.Where(a => a.TypeConstraint == VariableType.Texture);
        if (!arrayVariables.Any())
        {
            Debug.LogWarning("FsmArray<Texture> がありません");
            return;
        }

        FsmArray target = null;
        foreach (var a in arrayVariables)
        {
            if (EditorUtility.DisplayDialog("確認", $"{a.Name} に対して処理しますか？", "OK", "次へ"))
            {
                target = a;
                break;
            }
        }
        if (target == null)
        {
            Debug.LogWarning("処理対象が選ばれませんでした");
            return;
        }

        const string TargetDirectoryKey = "FsmTextureArraySetter/TargetDirectoryPath";
        var directoryPath = EditorUtility.OpenFolderPanel("フォルダ選択", EditorPrefs.GetString(TargetDirectoryKey, Application.dataPath), String.Empty);
        if (string.IsNullOrEmpty(directoryPath))
        {
            return;
        }
        EditorPrefs.SetString(TargetDirectoryKey, directoryPath);
        Debug.Log("対象ディレクトリ: " + directoryPath);
        
        // 絶対パスを Assets/ から始まる相対パスにする
        var absoluteUri = new Uri(directoryPath);
        var baseUri = new Uri(Application.dataPath);
        var relativeUri = baseUri.MakeRelativeUri(absoluteUri);
        // Debug.Log(absoluteUri);
        // Debug.Log(baseUri);
        // Debug.Log(Uri.UnescapeDataString(relativeUri.ToString()));

        var guids = AssetDatabase.FindAssets("t:texture2D", new[] {Uri.UnescapeDataString(relativeUri.ToString())});
        // foreach (var guid in guids)
        // {
        //     Debug.Log(AssetDatabase.GUIDToAssetPath(guid));
        // }
        
        fsm.FsmVariables.DeleteVariable(target);
        var length = guids.Count();
        target.objectReferences = new UnityEngine.Object[length];
        var index = 0;
        foreach (var guid in guids)
        {
            var path = AssetDatabase.GUIDToAssetPath(guid);
            var asset = AssetDatabase.LoadAssetAtPath<Texture>(path);
            target.objectReferences[index++] = asset;
        }
        fsm.FsmVariables.AddVariable(target);
    }
}
#endif