Hide and Show

Part of the Nodes and Scenes section of Coddy's Godot journey. Lesson 23 of 28.

visible is true when a node is shown and false when it is hidden. A hidden node hides its children too. hide() and show() do the same as setting it:

$Mouth.visible = false   # or $Mouth.hide()

not turns true into false and back. So bulb.visible = not bulb.visible hides the bulb if it was shown, and shows it if it was hidden.

To blink, switch on a clock. A node variable that adds up delta counts seconds. When it reaches your time, switch, and take that time off the clock:

timer += delta
if timer >= 1.0:
	timer -= 1.0
	print("tick")

That prints tick once a second.

Challenge

Easy

Make the bulb on the robot's antenna blink.

In _process(), add delta to timer on every frame.
When timer reaches 0.5, take 0.5 off it and switch bulb.visible.

Press Play: the bulb starts lit, then goes off and on every half second. Then Check.

Try it yourself

extends Node2D

@onready var bulb = $Bulb
var timer = 0.0

func _process(delta):
	pass

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Nodes and Scenes

1Your First Godot Game

What Is Godot?Ready Runs Once Print in Godot The Scene Tree Set a Position Move a Node Once

4Finding Nodes

The Dollar Sign Node Paths Onready Change a ColorHide and Show

2Every Frame

Process Runs Every Frame Delta Pixels per Second Move Diagonally Spin With Rotation Grow With Scale

5Project: Screensaver

Screensaver: Drift Screensaver: Side Walls

Screensaver: Top and Bottom

Screensaver: Color List

Screensaver: New Colors

3Values You Can Tune

Variables on a Node Constants Export Variables Vector2 Math Wrap Around the Screen Your Own Functions

Practice on your own: Godot playground