Book Image

Learning Design Patterns with Unity

By : Harrison Ferrone
Book Image

Learning Design Patterns with Unity

By: Harrison Ferrone

Overview of this book

Struggling to write maintainable and clean code for your Unity games? Look no further! Learning Design Patterns with Unity empowers you to harness the fullest potential of popular design patterns while building exciting Unity projects. Through hands-on game development, you'll master creational patterns like Prototype to efficiently spawn enemies and delve into behavioral patterns like Observer to create reactive game mechanics. 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 2023 book, the way you develop Unity games will change. You'll emerge not just as a more skilled Unity developer, but as a well-rounded software engineer equipped with industry-leading design patterns.
Table of Contents (23 chapters)
21
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22
Index

Breaking down the Prototype pattern

As part of the creational family of design patterns, the Prototype pattern gives us control over how we make copies of common base objects, making it effective when:

  • A system needs to be independent of how its objects are created, composed, and represented.
  • The objects you’re creating need to be specified at runtime.
  • You want to avoid parallel class hierarchies of factories and objects.
  • You want to specify the kind of objects you’re creating by defining a prototypical instance and copying it.

A useful mental model for this scenario is a photocopier (remember those?), shown in Figure 3.1. If we had a memo to pass around the office, it wouldn’t be efficient to create a new memo for each employee; instead, we’d simply duplicate the original memo and hand out copies (or use email, whichever ends up being faster).

Diagram  Description automatically generated

Figure 3.1: Photocopy machine example

Rather than spending...