Before we get started, there are a few things that you'll need. Grab a snack, a bottle of water, or a cup of coffee. Besides that, you'll need a PC (Windows or Mac) with Unity 2018 installed.

You don't need a super powerful computer rig. While Unity can be a beast that can render complex scenes, and VR manufacturers like Oculus have published recommended specifications for PC hardware, you can actually get by with less; even a laptop will do for the projects in this book.

To get Unity, go to https://store.unity.com, select Personal, and download the installer. The free Personal version is fine.

We also optionally use the Blender open source project for 3D modeling. This book isn't about Blender, but we'll use it if you want. To get Blender, go to https://www.blender.org/download/ and follow the instructions for your platform.

Access to a virtual reality head-mounted display (HMD) is strongly recommended in order to try out your builds and get first-hand experience of the projects developed in this book. Although not entirely required, you can use the emulation modes while working in Unity. Depending on your platform, you may need to install additional development tools. Chapter 3, VR Build and Run, goes into details of what you need for each device and platform, including SteamVr, Oculus Rift, Windows MR, GearVR, Oculus Go, Google Daydream, and others.

That should just about do it—a PC, the Unity software, a VR device, other tools described in Chapter 3, VR Build and Run, and we're good to go! Oh, some projects will be more complete if you download the associated assets from the Packt website, as follows.

You can download the project assets and example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Unity-Virtual-Reality-Projects-Second-Edition. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https: //www.packtpub.com/sites/default/files/downloads/B08826_UnityVirtualRealityProjectsSecondEdition_ColorImages.pdf.

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

void Update () {
Transform camera = Camera.main.transform;
Ray ray;
RaycastHit hit;
GameObject hitObject; 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

 using UnityEngine;
using UnityEngine.Networking;
public class AvatarMultiplayer : NetworkBehaviour
{
public override void OnStartLocalPlayer()
{
GameObject camera = Camera.main.gameObject;
transform.parent = camera.transform;
transform.localPosition = Vector3.zero;
GetComponent<OvrAvatar>().enabled = false;
}
} 

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."