You're reading from Learning Design Patterns with Unity

Product type Book

Published in May 2024

Publisher Packt

ISBN-13 9781805120285

Pages 676 pages

Edition 1st Edition

Languages

Concepts

Game Design

Author (1):

Harrison Ferrone

Table of Contents (23) Chapters

Preface

1. Priming the System

2. Managing Access with the Singleton Pattern

3. Spawning Enemies with the Prototype Pattern

4. Creating Items with the Factory Method Pattern

5. Building a Crafting System with the Abstract Factory Pattern

6. Assembling Support Characters with the Builder Pattern

7. Managing Performance and Memory with Object Pooling

8. Binding Actions with the Command Pattern

9. Decoupling Systems with the Observer Pattern

10. Controlling Behavior with the State Pattern

11. Adding Features with the Visitor Pattern

12. Swapping Algorithms with the Strategy Pattern

13. Making Monsters with the Type Object Pattern

14. Taking Data Snapshots with the Memento Pattern

15. Dynamic Upgrades with the Decorator Pattern

16. Converting Incompatible Classes with the Adapter Pattern

17. Simplifying Subsystems with the Façade Pattern

18. Generating Terrains with the Flyweight Pattern

19. Global Access with the Service Locator Pattern

20. The Road Ahead

21. Other Books You May Enjoy

22. Index

Strategies the Unity way

When it comes to adapting the Strategy pattern to Unity, your first instinct may very well be to jump right into MonoBehaviours.

While this is perfectly fine for the context class, attaching individual concrete strategies as components on a GameObject and passing them to a context class gets a little messy. That’s not to say you can’t do it that way, but ScriptableObjects shine in this kind of delegation capacity, especially when the strategies need data injected into them from the context and when the strategies have specific data they need to store.

Going the ScriptableObject route also opens possibilities for in-game testing, emergent design, and creating a variety of strategies as assets that you can drag and drop in the Editor. The starter project already has three characters in the scene, which makes it a perfect fit for applying different behavior strategies at runtime.