轨迹插件引入
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// =====================================================================
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// Copyright 2013-2017 Fluffy Underware
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// All rights reserved
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//
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// http://www.fluffyunderware.com
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// =====================================================================
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using UnityEngine;
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#if UNITY_EDITOR
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using UnityEditor;
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#endif
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using System.Collections;
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using System;
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using System.Collections.Generic;
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using FluffyUnderware.DevTools.Extensions;
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namespace FluffyUnderware.DevTools
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{
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/// <summary>
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/// A pool of instances of a prefab GameObject
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/// </summary>
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[RequireComponent(typeof(PoolManager))]
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[HelpURL(DTUtility.HelpUrlBase + "dtprefabpool")]
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public class PrefabPool : DTVersionedMonoBehaviour, IPool
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{
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[FieldCondition(nameof(m_Identifier), "", false, ActionAttribute.ActionEnum.ShowWarning, "Please enter an identifier! (Select a prefab to set automatically)")]
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[SerializeField]
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string m_Identifier;
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[SerializeField]
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List<GameObject> m_Prefabs = new List<GameObject>();
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[Inline]
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[SerializeField]
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PoolSettings m_Settings;
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PoolManager mManager;
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public string Identifier
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{
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get { return m_Identifier; }
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set
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{
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if (m_Identifier != value)
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{
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string v = value;
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if (string.IsNullOrEmpty(m_Identifier))
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v = Manager.GetUniqueIdentifier(v);
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m_Identifier = value;
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}
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}
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}
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public List<GameObject> Prefabs
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{
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get { return m_Prefabs; }
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set
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{
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if (m_Prefabs != value)
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m_Prefabs = value;
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}
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}
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public PoolSettings Settings
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{
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get { return m_Settings; }
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set
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{
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if (m_Settings != value)
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m_Settings = value;
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if (m_Settings != null)
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m_Settings.OnValidate();
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}
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}
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public PoolManager Manager
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{
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get
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{
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if (mManager == null)
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mManager = GetComponent<PoolManager>();
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return mManager;
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}
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}
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List<GameObject> mObjects = new List<GameObject>();
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double mLastTime;
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double mDeltaTime;
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void Start()
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{
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if (Settings.Prewarm)
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Reset();
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}
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#if UNITY_EDITOR
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void OnValidate()
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{
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Settings = m_Settings;
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}
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#endif
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public void Initialize(string ident, PoolSettings settings, params GameObject[] prefabs)
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{
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Identifier = ident;
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m_Settings = settings;
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Prefabs = new List<GameObject>(prefabs);
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mLastTime = DTTime.TimeSinceStartup + UnityEngine.Random.Range(0, Settings.Speed);
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if (Settings.Prewarm)
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Reset();
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}
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public void Update()
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{
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if (Application.isPlaying)
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{
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mDeltaTime += DTTime.TimeSinceStartup - mLastTime;
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mLastTime = DTTime.TimeSinceStartup;
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if (Settings.Speed > 0)
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{
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int c = (int)(mDeltaTime / Settings.Speed);
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mDeltaTime -= c;
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if (Count > Settings.Threshold)
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{
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c = Mathf.Min(c, Count - Settings.Threshold);
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while (c-- > 0)
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{
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if (Settings.Debug)
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log("Threshold exceeded: Deleting item");
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destroy(mObjects[0]);
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mObjects.RemoveAt(0);
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}
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}
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else if (Count < Settings.MinItems)
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{
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c = Mathf.Min(c, Settings.MinItems - Count);
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while (c-- > 0)
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{
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if (Settings.Debug)
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log("Below MinItems: Adding item");
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mObjects.Add(create());
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}
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}
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}
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else
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mDeltaTime = 0;
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}
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}
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public void Reset()
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{
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if (Application.isPlaying)
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{
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while (Count < Settings.MinItems)
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{
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mObjects.Add(create());
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}
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while (Count > Settings.Threshold)
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{
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destroy(mObjects[0]);
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mObjects.RemoveAt(0);
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}
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if (Settings.Debug)
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log("Prewarm/Reset");
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}
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}
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public void Clear()
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{
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if (Settings.Debug)
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log("Clear");
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for (int i = 0; i < Count; i++)
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destroy(mObjects[i]);
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mObjects.Clear();
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}
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public int Count
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{
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get { return mObjects.Count; }
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}
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public GameObject Pop(Transform parent = null)
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{
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GameObject item = null;
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if (Count > 0)
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{
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item = mObjects[0];
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mObjects.RemoveAt(0);
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}
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else
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{
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if (Settings.AutoCreate || !Application.isPlaying)
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{
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if (Settings.Debug)
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log("Auto create item");
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item = create();
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}
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}
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if (item)
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{
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item.gameObject.hideFlags = HideFlags.None;
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item.transform.parent = parent;
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if (Settings.AutoEnableDisable)
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item.SetActive(true);
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sendAfterPop(item);
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if (Settings.Debug)
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log("Pop " + item);
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}
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return item;
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}
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public virtual void Push(GameObject item)
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{
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if (Settings.Debug)
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log("Push " + item);
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#if UNITY_EDITOR
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if (!Application.isPlaying)
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{
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item.gameObject.Destroy(false, true);
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}
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else
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#endif
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if (item != null)
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{
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sendBeforePush(item);
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mObjects.Add(item);
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item.transform.parent = transform;
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item.gameObject.hideFlags = (Settings.Debug) ? HideFlags.DontSave : HideFlags.HideAndDontSave;
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if (Settings.AutoEnableDisable)
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item.SetActive(false);
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}
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}
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GameObject create()
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{
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if (Prefabs.Count == 0)
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throw new InvalidOperationException(String.Format("[Curvy] The Prefab Pool '{0}' in game object '{1}' could not create a pool element because its Prefabs list is empty", this.Identifier, this.gameObject.name));
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//TODO should this Random.Range call be deterministic?
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GameObject prefab = Prefabs[UnityEngine.Random.Range(0, Prefabs.Count)];
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GameObject result;
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{
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#if UNITY_EDITOR
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bool isPrefabAsset;
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//We have to check GetPrefabInstanceStatus first, because GetPrefabAssetType returns (as far as I understand) the same thing for both a prefab asset and a prefab instance
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if (PrefabUtility.GetPrefabInstanceStatus(prefab) == PrefabInstanceStatus.NotAPrefab)
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{
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PrefabAssetType prefabAssetType = PrefabUtility.GetPrefabAssetType(prefab);
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isPrefabAsset = prefabAssetType == PrefabAssetType.Regular || prefabAssetType == PrefabAssetType.Variant;
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}
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else
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isPrefabAsset = false;
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result = isPrefabAsset
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? PrefabUtility.InstantiatePrefab(prefab) as GameObject
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: Instantiate(prefab);
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#else
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result = Instantiate(prefab);
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#endif
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}
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result.name = prefab.name;
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result.transform.parent = transform;
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if (Settings.AutoEnableDisable)
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result.SetActive(false);
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return result;
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}
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void destroy(GameObject go)
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{
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go.Destroy(false, true);
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}
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void log(string msg)
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{
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Debug.Log(string.Format("[{0}] ({1} items) {2}", Identifier, Count, msg));
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}
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void setParent(Transform item, Transform parent)
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{
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if (item != null)
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item.parent = parent;
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}
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void sendAfterPop(GameObject item)
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{
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item.SendMessage(nameof(IPoolable.OnAfterPop), SendMessageOptions.DontRequireReceiver);
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}
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void sendBeforePush(GameObject item)
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{
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item.SendMessage(nameof(IPoolable.OnBeforePush), SendMessageOptions.DontRequireReceiver);
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}
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}
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}
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