Another Node's Signal
Part of the Signals and Collisions section of Coddy's Godot journey. Lesson 9 of 27.
A script can also listen to another node's signal. Get the node with $, then connect its signal:
$Switch.body_entered.connect(_on_switch_body_entered)This reads: when Switch sends body_entered, call _on_switch_body_entered. The function is in this script, so it can use this script's nodes, like $Light.
Games are often wired this way. One main script connects the switch, the light and the door, and each of those stays simple. Godot names such functions _on_, then the node, then the signal.
Challenge
EasyMain has a function that turns the light on, but nothing calls it. In Main's _ready(), connect the Switch's body_entered to _on_switch_body_entered. Then step on the green switch.
Try it yourself
extends Node2D
func _ready():
pass
func _on_switch_body_entered(body):
$Light.visible = true
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Signals and Collisions
2Signals
Areas Meet AreasYour Own SignalSignals With ValuesAnother Node's SignalListen to Your Signal
Practice on your own: Godot playground