[Add/Update] Add Explosion with pooling, Update RecyclableObject

MissileCommander/Assets/Game/Core/BulletLauncher.prefab

@@ -158,5 +158,7 @@ MonoBehaviour:
   m_EditorClassIdentifier: 
   bulletPrefab: {fileID: 649290798713983650, guid: f0b0296c96dfd8b46b8397a3a4160464,
     type: 3}
+  explosionPrefab: {fileID: 8426078496689282687, guid: d401f0d58b518e64dbe56122d51a2f31,
+    type: 3}
   firePosition: {fileID: 787914998351899525}
   fireDelay: 0.5

MissileCommander/Assets/Game/Core/Explosion.prefab

@@ -0,0 +1,167 @@
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MissileCommander/Assets/_Scripts/Bullet.cs

@@ -6,40 +6,24 @@ namespace MissileCommander
     public class Bullet : RecyclableObject
     {
         [SerializeField] private float moveSpeed = 5f;
-
-        private Transform _cachedTransform;
-        private Transform CachedTransform => _cachedTransform ? _cachedTransform : (_cachedTransform = transform);
-        private Vector3 _targetPosition;
         [SerializeField] private float sqrApproximateOffset = 0.01f;
-        private bool _isActivated = false;
-        public event Action<Bullet> OnDestroyed = delegate {  };
 
         private void Update()
         {
-            if (!_isActivated) { return; }
+            if (!isActivated) { return; }
 
             CachedTransform.position += Time.deltaTime * moveSpeed * transform.up;
 
             if (IsArrivedToTarget())
             {
-                _isActivated = false;
-                OnDestroyed(this);
+                isActivated = false;
+                onDestroyed?.Invoke(this);
             }
         }
 
-        public void Activate(Vector3 startPos, Vector3 targetPos)
-        {
-            this._targetPosition = targetPos;
-
-            Vector3 direction = (targetPos - startPos).normalized;
-            CachedTransform.SetPositionAndRotation(startPos,
-                                                   Quaternion.LookRotation(CachedTransform.forward, direction));
-            _isActivated = true;
-        }
-
         private bool IsArrivedToTarget()
         {
-            float sqrDist = (_targetPosition - CachedTransform.position).sqrMagnitude;
+            float sqrDist = (targetPosition - CachedTransform.position).sqrMagnitude;
             return sqrDist < sqrApproximateOffset;
         }
     }

MissileCommander/Assets/_Scripts/BulletLauncher.cs

@@ -6,16 +6,19 @@ namespace MissileCommander
     public class BulletLauncher : MonoBehaviour
     {
         [SerializeField] private Bullet bulletPrefab;
+        [SerializeField] private Explosion explosionPrefab;
         [SerializeField] private Transform firePosition;
         [SerializeField] private float fireDelay = 0.5f;
         private float _elapsedFireTime;
         private bool _canShoot = true;
 
         private Factory _bulletFactory;
+        private Factory _explosionFactory;
 
         private void Awake()
         {
             _bulletFactory = new Factory(bulletPrefab);
+            _explosionFactory = new Factory(explosionPrefab);
         }
 
         private void Update()
@@ -36,17 +39,28 @@ public void OnFireButtonPressed(Vector3 mousePosition)
             if (!_canShoot) { return; }
 
             // Instantiate Bullet
-            Bullet bullet = _bulletFactory.Get() as Bullet;
+            RecyclableObject bullet = _bulletFactory.Get();
             bullet.Activate(firePosition.position, mousePosition);
-            bullet.OnDestroyed += OnBulletDestroyed;
+            bullet.onDestroyed += OnBulletExplode;
 
             _canShoot = false;
         }
 
-        public void OnBulletDestroyed(Bullet usedBullet)
+        public void OnBulletExplode(RecyclableObject usedBullet)
         {
-            usedBullet.OnDestroyed -= OnBulletDestroyed;
+            Vector3 lastBulletPos = usedBullet.CachedTransform.position;
+            usedBullet.onDestroyed -= OnBulletExplode;
             _bulletFactory.ReturnToPool(usedBullet);
+
+            RecyclableObject explosion = _explosionFactory.Get();
+            explosion.Activate((lastBulletPos));
+            explosion.onDestroyed += OnExplosionDestroyed;
+        }
+
+        private void OnExplosionDestroyed(RecyclableObject explosion)
+        {
+            explosion.onDestroyed -= OnExplosionDestroyed;
+            _explosionFactory.ReturnToPool(explosion);
         }
     }
 }

MissileCommander/Assets/_Scripts/Explosion.cs

@@ -0,0 +1,44 @@
+using System;
+using UnityEngine;
+
+namespace MissileCommander
+{
+    [RequireComponent(typeof(Rigidbody2D), typeof(CircleCollider2D))]
+    public class Explosion : RecyclableObject
+    {
+        private Rigidbody2D _rigidbody2D;
+        private CircleCollider2D _circleCollider2D;
+
+        [SerializeField] private float timeToRemove = 1f;
+        private float _elapsedTime;
+
+        private void Awake()
+        {
+            _rigidbody2D = GetComponent<Rigidbody2D>();
+            _circleCollider2D = GetComponent<CircleCollider2D>();
+
+            _rigidbody2D.bodyType = RigidbodyType2D.Kinematic;
+            _circleCollider2D.isTrigger = true;
+        }
+
+        private void Update()
+        {
+            if (isActivated)
+            {
+                _elapsedTime += Time.deltaTime;
+                if (_elapsedTime >= timeToRemove)
+                {
+                    _elapsedTime = 0f;
+                    DestroySelf();
+                }
+            }
+        }
+
+        private void DestroySelf()
+        {
+            isActivated = false;
+            onDestroyed?.Invoke(this);
+            Debug.Log($"{gameObject.name} is Destroyed!");
+        }
+    }
+}

MissileCommander/Assets/_Scripts/RecyclableObject.cs

@@ -1,9 +1,32 @@
-using UnityEngine;
+using System;
+using UnityEngine;
 
 namespace MissileCommander
 {
     public class RecyclableObject : MonoBehaviour
     {
+        protected bool isActivated = false;
+        protected Vector3 targetPosition;
+        public Action<RecyclableObject> onDestroyed;
 
+        private Transform _cachedTransform;
+        public Transform CachedTransform => _cachedTransform ? _cachedTransform : (_cachedTransform = transform);
+
+
+        public virtual void Activate(Vector3 position)
+        {
+            isActivated = true;
+            transform.position = position;
+        }
+
+        public virtual void Activate(Vector3 startPos, Vector3 targetPos)
+        {
+            this.targetPosition = targetPos;
+
+            Vector3 direction = (targetPos - startPos).normalized;
+            CachedTransform.SetPositionAndRotation(startPos,
+                Quaternion.LookRotation(CachedTransform.forward, direction));
+            isActivated = true;
+        }
     }
 }