Book Image

Unity 2021 Cookbook - Fourth Edition

By : Shaun Ferns
Book Image

Unity 2021 Cookbook - Fourth Edition

By: Shaun Ferns

Overview of this book

If you are a Unity developer looking to explore the newest features of Unity 2021 and recipes for advanced challenges, then this fourth edition of Unity Cookbook is here to help you. With this cookbook, you’ll work through a wide variety of recipes that will help you use the essential features of the Unity game engine to their fullest potential. You familiarize yourself with shaders and Shader Graph before exploring animation features to enhance your skills in building games. As you progress, you will gain insights into Unity's latest editor, which will help you in laying out scenes, tweaking existing apps, and building custom tools for augmented reality and virtual reality (AR/VR) experiences. The book will also guide you through many Unity C# gameplay scripting techniques, teaching you how to communicate with database-driven websites and process XML and JSON data files. By the end of this Unity book, you will have gained a comprehensive understanding of Unity game development and built your development skills. The easy-to-follow recipes will earn a permanent place on your bookshelf for reference and help you build better games that stay true to your vision.
Table of Contents (15 chapters)
Free Chapter
2
Responding to User Events for Interactive UIs
3
Inventory and Advanced UIs
6
2D Animation and Physics
13
Advanced Topics - Gizmos, Automated Testing, and More
15
Virtual and Augmented Reality (VR/AR)

Automatically inferring the number of inventory slots based on the number of GameObjects tagged Star

Rather than having to manually change the NUM_INVENTORY_SLOTS Integer constant in the PlayerInventoryDisplay script class to match the number of GameObjects that have been created in the scene for the player to collect, let's have our script count how many GameObjects are tagged Star, and then use this to size and populate our array of references to inventory UI panel slots.

We just need to change from a constant to a variable for our array size and set that variable before anything else in our Awake() method. The GameObject.FindGameObjectsWithTag("Star") statement gets an array of references to all GameObjects tagged with Star, and its length is the array size we want:

  1. Replace the C# PlayerInventoryDisplay script class in the player-SpaceGirl GameObject with the following code:
using UnityEngine; 
using System.Collections;...