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)
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Index

Breaking down the Visitor pattern

As part of the Behavioral family of design patterns, the Visitor pattern is all about adding new features without changing existing structures or class hierarchies. This approach is ideal when you want to apply new requirements to pre-existing objects or when dealing with legacy code (or systems) that can’t be directly modified for one reason or another. The Visitor pattern is useful when:

  • You need to add new behaviors (i.e., operations or algorithms) to existing objects without changing the object’s class.
  • You want to perform operations on a set of unrelated objects that don’t share the same interfaces or parent classes.
  • You want to group related sets of behaviors or algorithms that can be applied to a set of objects without adding unrelated behaviors to classes that don’t need them.

Sometimes, the party-guest-visiting analogy isn’t concrete enough to visualize, even though the pattern...