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

Defining character states

In our game, the entity that will transition between states the most is our racing bike. It's under the player's control; it interacts with almost every element in the environment, including obstacles and enemy drones. Therefore, it will never stay in the same state for long. 

The following diagram showcases a shortlist of finite states for our bike:

Figure 5.2 – Diagram illustrating the finite states of the bike

And now let's define some expected behaviors for some of the listed states:

  • Stop: In this state, the bike is not moving. Its current speed is at zero. Its gears are set to neutral. If we decide that the engine should be on, but running in idle mode in that state, we could have an animation of the chassis of the bike vibrating to show that the motor is running.
  • Start: In this state, the bike moves at full speed, and the wheels turn to match the forward motion.
  • Turn: In the turning state, the bike turns to the left or...