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)
1
Sections 1: Fundamentals
5
Section 2: Core Patterns
16
Section 3: Alternative Patterns
20
About Packt

Benefits and drawbacks of the Visitor pattern

I've written a short list of the benefits and drawbacks of using this pattern.

The following are the benefits:

  • Open/Closed: You can add new behaviors that can work with objects of different classes without modifying them directly. This approach follows the object-oriented programming principle of Open/Closed that states that entities should be open for extension but closed for modification.
  •  Single Responsibility: The Visitor pattern can adhere to the single responsibility principle in the sense you can have an object (visitable) that holds the data and another object (visitor) is responsible for introducing specific behaviors.

The following are some of the potential drawbacks:

  • Accessibility: Visitors could lack the necessary access to specific private fields and methods of the elements that they are visiting. Therefore, we might need to expose more public properties in our classes than we usually would if we didn't use the...