What is ECS?
- Game Development course
- Expert
- Lesson 19/47
- 4 min
Learn the Entity Component System architecture.
What Is ECS?
Entity Component System (ECS) is an architecture that separates game objects into data and behavior. An Entity represents an object, a Component stores its data, and a System processes that data. This separation makes it easier to manage large numbers of game objects.
Entity: Player
Components:
Position
Health
SpeedAn Entity belongs to an Archetype group based on its combination of Components.
The Relationship Between Entity and Archetype
An Entity does not carry game object data by itself; that data is stored in Component elements. Entities with the same combination of Components are grouped under the same Archetype. For example, two Entities with Position and Health components can belong to the same group.
Archetype A:
Position
Health
Archetype B:
Position
SpeedWhen the Component combination changes, an Entity can move to a different Archetype group.
Practice Print ECS Concepts to the Console
Create a MonoBehaviour class named ECSIntroduction. In the Start method, print the three core concepts of ECS architecture separately to the console: Entity, Component, and System.
Starter code
using UnityEngine;
public class ECSIntroduction : MonoBehaviour
{
void Start()
{
// Üç ECS kavramını ayrı ayrı yazdır
}
}Sample solution
using UnityEngine;
public class ECSIntroduction : MonoBehaviour
{
void Start()
{
Debug.Log("Entity");
Debug.Log("Component");
Debug.Log("System");
}
}Expected output
Entity Component System
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Which core concept represents a game object in ECS architecture?
- System
- Entity Correct answer
- Archetype
- Compiler
Explanation: An Entity represents the identity of a game object in ECS architecture. Its data is stored in Component elements.
2 Identify Entity Components
Entity: Enemy
Components:
Position
____Entity: Enemy
Components:
Position
HealthExplanation: Health is a data component that the Enemy Entity can have.
3 ECS Architecture Concepts
| Term | Meaning |
|---|---|
Entity |
Represents the identity of a game object |
Component |
Stores data belonging to an object |
System |
Processes component data |
Archetype |
Defines a component combination |