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The _process method

Learn to run code every frame with _process.

_process(delta) and Game Loop

_process(delta) is the function called on every frame in Godot's main game loop. Continuous movement, keyboard and mouse inputs, or constantly changing counters are updated inside this function.

extends Node2D

func _process(delta: float):
    position.x += 100.0 * delta

Frame-Rate Independent Movement

Games can run at different frame rates such as 30, 60, or 144 FPS across different hardware. Multiplying movement by delta normalizes the distance traveled per second, ensuring the game runs at the same speed on every computer.

extends Node2D

var hiz: float = 250.0

func _process(delta: float):
    position.y += hiz * delta

Practice Define _process and _ready

Define the _process(delta) function with pass in its body. Inside _ready(), print print("Döngü hazır").

Starter code

Player.cs
extends Node2D

# _process(delta) fonksiyonunu tanımla

func _ready():
    # "Döngü hazır" mesajını yazdır
    pass

Sample solution

Player.cs
extends Node2D

func _process(delta):
    pass

func _ready():
    print("Döngü hazır")

Expected output

Döngü hazır

Questions and answers

Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.

1 What does the delta parameter passed to the _process(delta) function represent?

  • Time elapsed since the last frame in seconds Correct answer
  • Total count of nodes in the scene tree
  • Total frame count in the game
  • Aspect ratio of the screen resolution

Explanation: delta represents the time elapsed from the previous frame to this one (in seconds).

2 _process function parameter

Question 
extends Node2D

func _process(____):
    pass
Answer 
extends Node2D

func _process(delta):
    pass

Explanation: The _process function takes the delta parameter indicating elapsed time.

3 Game Loop Components

Term Meaning
_process() Loop function called once per frame
delta Time elapsed between two frames
FPS Frames processed per second
Bağımsız hareket Frame-independent speed using delta

All lessons in Beginner

1 What is game development?

  1. Intro to game development
  2. Game engines
  3. 2D and 3D games
  4. The game loop
  5. The scene concept
  6. Summary - Game dev fundamentals

2 Unity setup

  1. Installing Unity Hub
  2. Creating your first project
  3. The editor interface
  4. Toolbar and playback
  5. Saving the project
  6. Summary - Unity setup

3 First scene project

  1. Project overview
  2. Camera and light
  3. Your first cube in the scene
  4. Adding a material
  5. Testing in Play mode
  6. Summary - First scene

4 The GameObject concept

  1. What is a GameObject?
  2. Components
  3. The Hierarchy window
  4. Editing with the Inspector
  5. Tags and Layers
  6. Summary - GameObject

5 C# script basics

  1. Your first C# script
  2. using and namespace
  3. Class structure
  4. Variables and types
  5. Output with Debug.Log
  6. Summary - C# basics

6 MonoBehaviour

  1. What is MonoBehaviour?
  2. The Start method
  3. The Update method
  4. Awake vs Start
  5. SerializeField and public
  6. Summary - MonoBehaviour

7 Transform

  1. What is Transform?
  2. Changing position
  3. Moving with Translate
  4. Changing rotation
  5. Local vs world space
  6. Summary - Transform

8 Input

  1. The Input class
  2. Axis input
  3. Mouse input
  4. The new Input System
  5. Movement vector
  6. Summary - Input

9 Physics (Rigidbody/Collider)

  1. What is a Rigidbody?
  2. What is a Collider?
  3. Applying force with AddForce
  4. Collision events
  5. Trigger events
  6. Summary - Physics

10 2D Sprite

  1. What is a Sprite?
  2. SpriteRenderer
  3. Sprite import settings
  4. Sprite sorting
  5. Preparing sprite animation
  6. Summary - 2D Sprite

11 Godot basics

  1. The Godot editor
  2. A new project
  3. The scene tree
  4. The Node concept
  5. Saving the project
  6. Summary - Godot basics

12 GDScript

  1. What is GDScript?
  2. extends and variables
  3. Function definition
  4. Output with print
  5. Type hints
  6. Summary - GDScript

13 Node and Scene

  1. Node2D and Sprite2D
  2. Saving a scene
  3. Scene instance
  4. The _ready method
  5. The _process method
  6. Summary - Node and Scene

14 Beginner final

  1. Challenge 1: Print a score
  2. Challenge 2: Movement vector
  3. Challenge 3: Godot ready
  4. Challenge 4: Collision log
  5. Challenge 5: Final synthesis