Restrict spawning near the hero unit

cards/base_card.gd

@@ -11,6 +11,7 @@ export(PackedScene) var spawned_unit setget set_spawned_unit
 var dragged = false
 var base_position
 var selected_anchor
+var hero
 
 func _ready():
 	set_portrait(portrait)
@@ -40,14 +41,22 @@ func set_spawned_unit(val):
 			$points.visible = true
 		else:
 			$points.visible = false
+			
+func set_hero(val: Node):
+	hero = val
 		
 func can_be_used_on_anchor(anchor):
 	if anchor is Anchor:
-		if spawned_unit and not anchor.is_empty():
-			return false
-		return true
+		if spawned_unit:
+			return anchor.is_empty() and hero and anchor.is_connected_to(hero.get_parent())
+		else:
+			return true
 	else:
 		return false
+		
+func set_hand_location(loc: Vector2):
+	rect_position = loc
+	base_position = loc
 	
 func update_anchors():
 	var position = rect_global_position + rect_size / 2 if dragged else null

helpers/battle.gd

@@ -19,9 +19,10 @@ static func update_anchors(tree: SceneTree, position, acceptability) -> Anchor:
 		
 	return selected_anchor
 	
-static func spawn_unit(name: String, anchor: Anchor):
+static func spawn_unit(name: String, anchor: Anchor) -> Node:
 	""" Spawn a unit on an empty anchor
 	"""
 	var scene = load("res://units/" + name + ".tscn")
 	var node = scene.instance()
 	anchor.set_content(node)
+	return node

screens/battle/battle.gd

@@ -7,12 +7,15 @@ export(PackedScene) var deck_defend
 
 onready var deck_attack_cards = deck_attack.instance()
 onready var deck_defend_cards = deck_defend.instance()
+var hero_attack
+var hero_defend
 
 func _ready():
-	create_hero_units()
+	hero_attack = create_hero_unit("tomahawk", "attack_start")
+	hero_defend = create_hero_unit("rhino", "defend_start")
 	
-	fill_hand($hand_attack, deck_attack_cards)
-	fill_hand($hand_defend, deck_defend_cards)
+	fill_hand($hand_attack, deck_attack_cards, hero_attack)
+	fill_hand($hand_defend, deck_defend_cards, hero_defend)
 	
 func find_free_anchor(anchor_type: String):
 	for anchor in get_tree().get_nodes_in_group("anchors"):
@@ -23,17 +26,16 @@ func find_free_anchor(anchor_type: String):
 func create_hero_unit(name: String, anchor_type: String):
 	var anchor = find_free_anchor(anchor_type)
 	if anchor:
-		BattleHelper.spawn_unit("heroes/" + name, anchor)
+		return BattleHelper.spawn_unit("heroes/" + name, anchor)
+	else:
+		return null
 	
-func create_hero_units():
-	create_hero_unit("tomahawk", "attack_start")
-	create_hero_unit("rhino", "defend_start")
-	
-func fill_hand(hand: Node, deck: Node, limit=4):
+func fill_hand(hand: Node, deck: Node, hero: Node, limit=4):
 	while hand.get_child_count() < 4:
 		var count = deck.get_child_count()
 		var index = floor(rand_range(0, count))
 		var card = deck.get_child(index).duplicate()
+		card.set_hero(hero)
 		hand.add_child(card)
 
 	reorganize_hand(hand)
@@ -41,5 +43,5 @@ func fill_hand(hand: Node, deck: Node, limit=4):
 func reorganize_hand(hand: Node):
 	var i = 0
 	for card in hand.get_children():
-		card.rect_position = Vector2(i * 210, 0)
+		card.set_hand_location(Vector2(i * 210, 0))
 		i += 1