Added item holder that can hold pickable item instances

scripts/Player.gd

@@ -5,6 +5,8 @@ const SPEED = 3.0
 
 export var inventory = { "ore" : 0 }
 
+var item_in_hand
+
 # Called when the node enters the scene tree for the first time.
 func _ready():
 	pass # Replace with function body.
@@ -67,3 +69,25 @@ func try_trigger_interact(area):
 
 	print("player interacted with ", owner)
 	return true
+	
+func drop_item_in_hand():
+	print("player dropped ", item_in_hand.item_name)
+	var item_dropped = item_in_hand
+	$ItemSpawn.remove_child(item_in_hand)
+	item_in_hand = null
+	return item_dropped
+	
+func pick_up_item(item):
+	var item_dropped = null
+	if item_in_hand != null:
+		item_dropped = drop_item_in_hand()
+	item_in_hand = item
+	$ItemSpawn.add_child(item_in_hand)
+	print("player picked up ", item_in_hand.item_name)
+	return item_dropped
+	
+func get_item_in_hand():
+	var item_to_return = null
+	if item_in_hand != null:
+		item_to_return = drop_item_in_hand()
+	return item_to_return 

scripts/item.gd

@@ -0,0 +1,8 @@
+extends Spatial
+
+export var item_name : String = ""
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	assert(item_name != "")
+	$ItemLabel.text = "Item: %s" % item_name

scripts/item_holder.gd

@@ -0,0 +1,38 @@
+extends Spatial
+
+export var start_with_item : String = ""
+
+var item_in_hold
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	if start_with_item != "":
+		var item_instance = preload("res://scenes/item.tscn").instance()
+		item_instance.item_name = start_with_item
+		add_item(item_instance)
+
+func remove_item():
+	assert(item_in_hold != null)
+	var removed_item = item_in_hold
+	$ItemSpawn.remove_child(item_in_hold)
+	item_in_hold = null
+	return removed_item
+	
+func add_item(item):
+	assert(item_in_hold == null)
+	$ItemSpawn.add_child(item)
+	item_in_hold = item
+
+func on_player_interact(player) -> bool:
+	var player_item = player.get_item_in_hand()
+	if item_in_hold == null:
+		if player_item == null:
+			return false
+		add_item(player_item)
+	else:
+		var item_pickup = remove_item()
+		player.pick_up_item(item_pickup)
+		$AudioStreamPlayer.play()
+		if player_item != null:
+			add_item(player_item)
+	return true