conveyorPO

Assets/Scripts/Items/ItemManager.cs

@@ -0,0 +1,17 @@
+using UnityEngine;
+
+public class ItemManager : MonoBehaviour
+{
+    public static ItemManager instance;
+
+    private void Awake()
+    {
+        if (instance == null)
+        {
+            instance = this;
+        }
+    }
+
+
+
+}

Assets/Scripts/Items/ItemManager.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 27ab07ac74967d54c86450327d86934a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

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);
+    }
 }

Assets/Scripts/Items/ItemSO.cs

@@ -4,13 +4,22 @@ using UnityEngine;
 public class ItemSO : ScriptableObject
 {
     public string id;
-    public string name;
+    public string itemName;
     public GameObject prefab;
     public Sprite icon;
 
-    public void Spawn(Vector3 position)
+    public GameObject Spawn(Vector3 position)
     {
-        GameObject item = Instantiate(prefab, position, Quaternion.identity);
+        // Snap to grid
+
+        GridBuildingSystem.instance.buildingGrid.GetXY(position, out int x, out int y);
+
+        position = GridBuildingSystem.instance.buildingGrid.GetWorldPosition(x, y);
+
+        GameObject item = Instantiate(prefab, new Vector3(position.x, position.y, 0), Quaternion.identity);
         item.name = name;
+        item.GetComponent<ItemObject>().itemSO = this;
+
+        return item;
     }
 }