Book Image

Game Development Patterns with Unity 2021 - Second Edition

By : David Baron
Book Image

Game Development Patterns with Unity 2021 - Second Edition

By: David Baron

Overview of this book

This book is written for every game developer ready to tackle the bigger picture and start working with advanced programming techniques and design patterns in Unity. Game Development Patterns with Unity 2021 is an introduction to the core principles of reusable software patterns and how to employ them to build components efficiently. In this second edition, you'll tackle design patterns with the help of a practical example; a playable racing game prototype where you’ll get to apply all your newfound knowledge. Notable updates also include a game design document (GDD), a Unity programming primer, and the downloadable source code of a complete prototype. Your journey will start by learning about overall design of the core game mechanics and systems. You’ll discover tried-and-tested software patterns to code essential components of a game in a structured manner, and start using classic design patterns to utilize Unity's unique API features. As you progress, you'll also identify the negative impacts of bad architectural decisions and understand how to overcome them with simple but effective practices. By the end of this Unity book, the way you develop Unity games will change – you’ll adapt a more structured, scalable, and optimized process that will help you take the next step in your career.
Table of Contents (22 chapters)
Sections 1: Fundamentals
Section 2: Core Patterns
Section 3: Alternative Patterns
About Packt

Understanding the Singleton pattern

As its name implies, the Singleton pattern's primary goal is to guarantee singularity. This approach means if a class implements this pattern correctly, once initialized, it will have only one instance of itself in memory during runtime. This mechanism can be helpful when you have a class that manages a system that needs to be globally accessible from a singular and consistent entry point.

The design of the Singleton is quite simple. When you implement a Singleton class, it becomes responsible for making sure there's only a single occurrence of itself in memory. Once a Singleton detects an instance of an object of the same type as itself, it will destroy it immediately. Therefore, it's pretty ruthless and doesn't tolerate any competition. The following diagram illustrates the process to a certain degree:

Figure 4.1 – UML diagram of the Singleton pattern

The most important takeaway from this description of the Singleton...