Programming-Design-Patterns-And-Principles/Assets/Patterns_And_Principles/Patterns/Object Pool Pattern/UnityObjectPool/Script/Launcher.cs

using System;
using UnityEngine;
using UnityEngine.Pool;

namespace Patterns_And_Principles.Patterns.Object_Pool_Pattern.UnityObjectPool.Script
{
    public class Launcher : MonoBehaviour
    {
        [SerializeField]
        private Bullet bulletPrefab;

        [SerializeField]
        private int maxPoolSize = 10;


        private IObjectPool<Bullet> _bulletPool;

        private void Awake()
        {
            _bulletPool = new ObjectPool<Bullet>(createFunc: OnCreate, actionOnGet: OnGet, actionOnRelease: OnRelase,
                actionOnDestroy: OnDestroy, maxSize: maxPoolSize);
        }

        private Bullet OnCreate()
        {
            Bullet bullet = Instantiate(bulletPrefab, transform.position, transform.rotation);
            bullet.SetPool(_bulletPool);
            return bullet;
        }

        private void OnGet(Bullet bullet)
        {
            bullet.gameObject.SetActive(true);
            bullet.gameObject.transform.position = transform.position;
        }

        private void OnRelase(Bullet bullet)
        {
            bullet.gameObject.SetActive(false);
        }

        private void OnDestroy(Bullet bullet)
        {
            Destroy(bullet.gameObject);
        }


        private void Update()
        {
            if (Input.GetKeyDown(KeyCode.Space))
            {
                _bulletPool.Get();
            }
        }
    }
}