Your Own Functions

Part of the Nodes and Scenes section of Coddy's Godot journey. Lesson 18 of 28.

Godot calls _ready() and _process() by itself. You can also write your own functions, to give a few lines a name:

func jump_to_start():
	position = Vector2(50, 250)

A function runs only when code calls it, by writing its name with brackets: jump_to_start(). Call it from _process() and it runs on every frame. Call it from _ready() and it runs once.

A good name says what the function does. Then _process() reads like a list of steps: move, then wrap.

Challenge

Easy

Wrap the robot at the right and bottom edges with your own function.

Under _process(), write func wrap_around(): holding the if for x past 640, plus one that sets y past 360 back to 0.
In _process(), call wrap_around() after the robot moves, in place of the if.

Press Play: the robot drifts down and right, and always comes back on the screen. Then Check.

Try it yourself

extends Node2D

var velocity = Vector2(200, 100)

func _process(delta):
	position += velocity * delta
	if position.x > 640:
		position.x = 0

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 Color Hide 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 ScreenYour Own Functions

Practice on your own: Godot playground