Placement and platforms

scripts/construction_placer.gd

@@ -0,0 +1,42 @@
+extends Node2D
+
+var held_construction : Construction
+
+func _ready() -> void:
+	GuiEventBus.construction_selected.connect(on_construction_selected)
+
+func _input(event: InputEvent) -> void:
+	if held_construction == null:
+		return
+	if event.is_action_pressed("plc_place"):
+		var zone = try_get_zone(held_construction.global_position)
+		if zone == null:
+			held_construction.queue_free()
+		else:
+			if zone.get_parent().get_node("EntityHolder").add_construction(held_construction):
+				held_construction = null
+	
+	if event.is_action_pressed("plc_cancel"):
+		held_construction.queue_free()
+
+func on_construction_selected(constructible : Constructible):
+	if held_construction:
+		held_construction.queue_free()
+	held_construction = constructible.scene.instantiate()
+	add_child(held_construction)
+	
+
+func _process(_delta: float) -> void:
+	if held_construction != null:
+		var mouse_pos = get_global_mouse_position()
+		var zone = try_get_zone(mouse_pos)
+		if zone:
+			global_position = zone.get_placement_position(mouse_pos)
+		else:
+			global_position = mouse_pos
+
+func try_get_zone(point : Vector2) -> BuildZone:
+	for zone in Registry.build_zones:
+		if zone.is_global_point_in_zone(point):
+			return zone
+	return null