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2D and 3D games

Learn the differences between 2D and 3D games and their approaches.

2D Games

2D games are created in a two-dimensional world. Object positions in this world are generally represented using horizontal and vertical axes. Characters and objects are often represented by two-dimensional images called sprites.

   Y
   ↑
   |
   |   ● Character
   |
   +----------→ X

Platform and puzzle games can be developed using a 2D approach.

3D Games

3D games are created in a three-dimensional world. Objects have three position axes: horizontal, vertical, and depth. Characters, buildings, and environment objects are often built using three-dimensional geometric models called meshes.

       Z (Depth)
      /
     ● Character
    /
   +----------→ X
   |
   |
   ↓ Y

With a 3D approach, objects can be viewed from different angles and create a sense of depth.

Practice Print the Type of a 2D Object

To identify a character's visual type in a 2D game, assign the value sprite to the objectType variable and print it.

Starter code

Player.cs
// 2D karakterin görsel türü
const objectType = "";
// Nesne türünü ekrana yazdır

Sample solution

Player.cs
// 2D karakterin görsel türü
const objectType = "sprite";
console.log(objectType);

Expected output

sprite

Questions and answers

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

1 Which element is commonly used to represent a character's visual appearance in a 2D game?

  • Three-dimensional camera
  • Audio file
  • Sprite Correct answer
  • Mesh

Explanation: A sprite is a two-dimensional image that represents characters and other visual objects in 2D games.

2 Identify the Three-Dimensional Model

Question 
const objectType = "____";
console.log(objectType);
Answer 
const objectType = "mesh";
console.log(objectType);

Explanation: A mesh represents the geometric structure of three-dimensional objects.

3 2D and 3D Concepts

Term Meaning
2D Two-dimensional game approach
3D Three-dimensional game approach
Sprite Two-dimensional visual
Mesh Three-dimensional geometric model

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