49 lines
1.7 KiB
C#
49 lines
1.7 KiB
C#
/*=========================================================================
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Library: iMSTK-Unity
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Copyright (c) Kitware, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0.txt
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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=========================================================================*/
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using UnityEngine;
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namespace ImstkUnity
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{
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// Simple singleton class as per https://blog.yarsalabs.com/using-singletons-in-unity/
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// More powerful version is https://gist.github.com/rickyah/271e3aa31ff8079365bc
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public class Singleton<T> : MonoBehaviour where T : MonoBehaviour
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{
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private static T _instance;
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public static T Instance()
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{
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if (_instance == null)
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{
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_instance = FindObjectOfType<T>();
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if (_instance == null)
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{
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_instance = new GameObject(typeof(T).Name).AddComponent<T>();
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}
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}
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else if (_instance != FindObjectOfType<T>())
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{
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Destroy(FindObjectOfType<T>());
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}
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// Need to check if this is necessary
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// DontDestroyOnLoad(_instance.gameObject);
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return _instance;
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}
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}
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} |