69 lines
1.8 KiB
C#
69 lines
1.8 KiB
C#
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using UnityEngine;
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public class ObjectPool<T> : MonoBehaviour where T : Component
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{
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[SerializeField] private int numObjects;
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[SerializeField] private T prefab;
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[SerializeField] private int numToSpawnPerFrame = 10;
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private List<T> _pool;
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private List<GameObject> _poolGameObjects;
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public event Action<T> OnObjectFound;
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public event Action Initialised;
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public (T, int) GetObject()
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{
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T foundObject = null;
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int idx = -1;
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if (_pool == null) return (null, -1);
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for (var index = _pool.Count - 1; index >= 0; index--)
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{
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if (!_poolGameObjects[index].activeSelf)
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{
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idx = index;
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foundObject = _pool[index];
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break;
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}
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}
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if (foundObject == null)
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Debug.LogWarning("No more objects in pool!");
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else
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OnObjectFound?.Invoke(foundObject);
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return (foundObject, idx);
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}
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public void ReturnObject(T obj, int idx)
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{
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_pool.RemoveAt(idx);
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_pool.Add(obj);
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_poolGameObjects.RemoveAt(idx);
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_poolGameObjects.Add(obj.gameObject);
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}
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public IEnumerator Start()
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{
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_pool = new List<T>(numObjects);
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_poolGameObjects = new List<GameObject>(numObjects);
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for (int i = 0; i < numObjects; ++i)
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{
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var instance = Instantiate(prefab, transform);
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instance.gameObject.SetActive(false);
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_pool.Add(instance);
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_poolGameObjects.Add(instance.gameObject);
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if (i % numToSpawnPerFrame == 0)
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yield return null;
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}
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Initialised?.Invoke();
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}
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}
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