conveyorPO

Assets/Scripts/Items/ItemObject.cs

@@ -1,7 +1,63 @@
 using UnityEngine;
 
-public class ItemObject : ScriptableObject
+public abstract class ItemObject : MonoBehaviour
 {
+    public int maxStackSize = 5;
+    public int stackSize = 1;
     public ItemSO itemSO;
+    public float timeAlive = 0.0f;
+    public float maxTimeAlive = 60.0f;
+    public abstract void OnSpawn();
 
+    private Rigidbody2D rb;
+
+    void Awake()
+    {
+        rb = GetComponent<Rigidbody2D>();
+    }
+
+    public void Despawn()
+    {
+        Destroy(gameObject);
+    }
+
+    private void OnCollisionEnter2D(Collision2D collision)
+    {
+        if (collision.gameObject.GetComponent<ItemObject>() != null)
+        {
+            ItemObject collisionItemObject = collision.gameObject.GetComponent<ItemObject>();
+            int addedStackSize = stackSize + collisionItemObject.stackSize;
+
+            if (collisionItemObject.timeAlive < timeAlive) // The other item stacks to me
+            {
+                if (addedStackSize <= maxStackSize)
+                {
+                    stackSize = addedStackSize;
+                    collisionItemObject.Despawn();
+                }
+                else
+                {
+                    stackSize = maxStackSize;
+                    collisionItemObject.stackSize = addedStackSize - maxStackSize;
+                }
+            }
+        }
+    }
+
+    void Update()
+    {
+        timeAlive += Time.deltaTime;
+        if (timeAlive > maxTimeAlive)
+        {
+            Despawn();
+        }
+    }
+
+    void FixedUpdate()
+    {
+        float speed = 0.3f; // TODO Get speed from ConveyorBelt
+        Vector2 direction = new Vector2(1f, 0f); // TODO Get direction from ConveyorBelt
+
+        rb.MovePosition(rb.position + (direction * speed) * Time.fixedDeltaTime);
+    }
 }