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Assets/Scripts/Items/ItemObject.cs

@@ -6,9 +6,18 @@ public abstract class ItemObject : MonoBehaviour
     public int stackSize = 1;
     public ItemSO itemSO;
     public float timeAlive = 0.0f;
-    public float maxTimeAlive = 60.0f;
+    public float maxTimeAlive = 600.0f;
+    public float maxTimeWithoutConveyor = 10.0f;
+    public float timeWithoutConveyor = 0.0f;
+
+    private ConveyorPO lastTouchedConveyor; // current conveyor but not set to null
+    private float conveyorSpeed = 0.0f;
+    private Vector2 conveyorDirection = Vector2.zero;
+
     public abstract void OnSpawn();
 
+    private ConveyorPO currentConveyor;
+
     private Rigidbody2D rb;
 
     void Awake()
@@ -51,13 +60,100 @@ public abstract class ItemObject : MonoBehaviour
         {
             Despawn();
         }
+
+        // Problem: Pivot point of an item is bottom-left, so its not proberly aligned with the conveyor
+        GridBuildingSystem gridBuildingSystem = GridBuildingSystem.instance;
+
+        //* Position has to change depending on which direction the item is heading, in order to stay on the conveyor
+        Vector3 tempPivotPosition = transform.position;
+
+        if (currentConveyor != null)
+        {
+            // TODO Freeze rigibody rotations based on direction
+            //* KEEP IN MIND -> PIVOT POINT IS BOTTOM-LEFT
+
+            // If direction changes
+            if (conveyorDirection != currentConveyor.GetDirection())
+            {
+                // Realign
+                gridBuildingSystem.buildingGrid.GetXY(lastTouchedConveyor.gameObject.transform.position, out int x, out int y);
+                transform.position = gridBuildingSystem.buildingGrid.GetWorldPosition(x, y);
+                conveyorDirection = currentConveyor.GetDirection();
+            }
+
+            if (conveyorDirection.y > 0) // Top
+            {
+                Debug.Log("Heading top");
+                tempPivotPosition = transform.position + new Vector3(transform.localScale.x / 2, 0, 0);
+            }
+
+            if (conveyorDirection.x > 0) // Right
+            {
+                Debug.Log("Heading right");
+                tempPivotPosition = transform.position + new Vector3(0, transform.localScale.y / 2, 0);
+            }
+
+            if (conveyorDirection.y < 0) // Bottom
+            {
+                Debug.Log("Heading bottom");
+                tempPivotPosition = transform.position + new Vector3(transform.localScale.x / 2, transform.localScale.y, 0);
+            }
+
+            if (conveyorDirection.x < 0) // Left
+            {
+                Debug.Log("Heading left");
+                tempPivotPosition = transform.position + new Vector3(transform.localScale.x, transform.localScale.y / 2, 0);
+            }
+            Debug.DrawLine(tempPivotPosition, Vector3.zero, Color.red);
+        }
+
+
+        gridBuildingSystem.buildingGrid.GetXY(tempPivotPosition, out int tempPivotX, out int tempPivotY);
+
+        GridBuildingSystem.GridObject gridObject = gridBuildingSystem.buildingGrid.GetGridObject(tempPivotX, tempPivotY);
+
+        if (gridObject.GetPlacedObject() != null)
+        {
+            if (gridObject.GetPlacedObject().gameObject.GetComponent<ConveyorPO>())
+            {
+                timeWithoutConveyor = 0.0f;
+                currentConveyor = gridObject.GetPlacedObject().gameObject.GetComponent<ConveyorPO>();
+                lastTouchedConveyor = currentConveyor;
+                conveyorSpeed = currentConveyor.GetSpeed();
+
+            }
+            else
+            {
+                UpdateWithoutConveyor();
+            }
+        }
+        else
+        {
+            UpdateWithoutConveyor();
+        }
+    }
+
+    private void UpdateWithoutConveyor()
+    {
+        currentConveyor = null;
+        timeWithoutConveyor += Time.deltaTime;
+        if (timeWithoutConveyor > maxTimeWithoutConveyor)
+        {
+            Debug.Log("Not on conveyor -> DESPAWN");
+            Despawn();
+        }
     }
 
     void FixedUpdate()
     {
-        float speed = 0.3f; // TODO Get speed from ConveyorBelt
-        Vector2 direction = new Vector2(1f, 0f); // TODO Get direction from ConveyorBelt
+        if (currentConveyor != null)
+        {
+            rb.MovePosition(rb.position + (conveyorDirection * conveyorSpeed) * Time.fixedDeltaTime);
+        }
+        else
+        {
+            // TODO Interrupt all movement
+        }
 
-        rb.MovePosition(rb.position + (direction * speed) * Time.fixedDeltaTime);
     }
 }