Book Image

Unity 2017 Game Optimization - Second Edition

By : Chris Dickinson
Book Image

Unity 2017 Game Optimization - Second Edition

By: Chris Dickinson

Overview of this book

Unity is an awesome game development engine. Through its massive feature-set and ease-of-use, Unity helps put some of the best processing and rendering technology in the hands of hobbyists and professionals alike. This book shows you how to make your games fly with the recent version of Unity 2017, and demonstrates that high performance does not need to be limited to games with the biggest teams and budgets. Since nothing turns gamers away from a game faster than a poor user-experience, the book starts by explaining how to use the Unity Profiler to detect problems. You will learn how to use stopwatches, timers and logging methods to diagnose the problem. You will then explore techniques to improve performance through better programming practices. Moving on, you will then learn about Unity’s built-in batching processes; when they can be used to improve performance, and their limitations. Next, you will import your art assets using minimal space, CPU and memory at runtime, and discover some underused features and approaches for managing asset data. You will also improve graphics, particle system and shader performance with a series of tips and tricks to make the most of GPU parallel processing. You will then delve into the fundamental layers of the Unity3D engine to discuss some issues that may be difficult to understand without a strong knowledge of its inner-workings. The book also introduces you to the critical performance problems for VR projects and how to tackle them. By the end of the book, you will have learned to improve the development workflow by properly organizing assets and ways to instantiate assets as quickly and waste-free as possible via object pooling.
Table of Contents (17 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback
Software and Hardware List

Draw Calls

Before we discuss Dynamic Batching and Static Batching independently, let's first understand the problems that they are both trying to solve within the Rendering Pipeline. We will try to keep fairly light on the technicalities as we will explore this topic in greater detail in Chapter 6, Dynamic Graphics.

The primary goal of these batching methods is to reduce the number of Draw Calls required to render all objects in the current view. At its most basic form, a Draw Call is a request sent from the CPU to the GPU asking it to draw an object.


Draw Call is the common industry vernacular for this process, although they are sometimes referred to as SetPass Calls in Unity, since some low-level methods are named as such. Think of it as configuring options before initiating the current rendering pass. We will refer to them as Draw Calls throughout the remainder of this book.

Before a Draw Call can be requested, several tasks need to be completed. Firstly, mesh and texture data must be...