轨迹插件引入

Assets/Plugins/ToolBuddy/Dependencies/DevTools/Components/DTSingleton.cs

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+// =====================================================================
+// Copyright 2013-2017 Fluffy Underware
+// All rights reserved
+// 
+// http://www.fluffyunderware.com
+// =====================================================================
+
+using System.Collections.Generic;
+using System.Linq;
+using FluffyUnderware.DevTools.Extensions;
+using UnityEngine;
+
+namespace FluffyUnderware.DevTools
+{
+
+    public class DTSingleton<T> : MonoBehaviour, IDTSingleton where T : MonoBehaviour, IDTSingleton
+    {
+        static T _instance;
+        static object _lock = new object();
+        static bool applicationIsQuitting = false;
+        bool isDuplicateInstance = false;
+
+        public static bool HasInstance
+        {
+            get { return _instance != null; }
+        }
+
+        public static T Instance
+        {
+            get
+            {
+                if (!Application.isPlaying)
+                    applicationIsQuitting = false;
+                if (applicationIsQuitting)
+                    return null;
+
+                if (_instance == null)
+                    lock (_lock)
+                        if (_instance == null)
+                        {
+                            IEnumerable<Object> objectsOfTypeT = FindObjectsOfType(typeof(T)).Where(o => o != null);
+#if CURVY_SANITY_CHECKS
+                            if (objectsOfTypeT.Count() != FindObjectsOfType(typeof(T)).Length)
+                                DTLog.LogError("[Curvy] DTSingleton.Instance : FindObjectsOfType " + typeof(T).FullName + " returned at least one null reference");
+#endif                              
+
+                            _instance = objectsOfTypeT.Any()
+                                ? (T)objectsOfTypeT.ElementAt(0)
+                                : new GameObject().AddComponent<T>();
+                        }
+
+                return _instance;
+            }
+        }
+
+        public virtual void Awake()
+        {
+            T instance = Instance;
+            lock (_lock)
+            {
+                if (instance == null)
+                    DTLog.LogError("[DevTools] DTSingleton instance was null. This happens if the instance is destroyed by the user, which is not a supported operation. If you did not destroy the singleton's instance, then please fill a bug report.");
+                else
+                    if (GetInstanceID() != instance.GetInstanceID())
+                    {
+                        instance.MergeDoubleLoaded((IDTSingleton)this);
+                        this.isDuplicateInstance = true;
+                        this.Invoke(nameof(DestroySelf), 0);
+                    }
+            }
+        }
+
+        protected virtual void OnDestroy()
+        {
+            lock (_lock)
+                if (Application.isPlaying && !isDuplicateInstance)
+                {
+                    applicationIsQuitting = true;
+                    _instance = null;
+                }
+        }
+
+        public virtual void MergeDoubleLoaded(IDTSingleton newInstance)
+        {
+        }
+
+        void DestroySelf()
+        {
+            gameObject.Destroy(false, true);
+        }
+
+    }
+
+    public interface IDTSingleton
+    {
+        void MergeDoubleLoaded(IDTSingleton newInstance);
+    }
+}