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Unity 2017 Game Optimization

You're reading from   Unity 2017 Game Optimization Optimize all aspects of Unity performance

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Product type Paperback
Published in Nov 2017
Publisher
ISBN-13 9781788392365
Length 376 pages
Edition 2nd Edition
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Author (1):
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Chris Dickinson Chris Dickinson
Author Profile Icon Chris Dickinson
Chris Dickinson
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Table of Contents (10) Chapters Close

Preface 1. Pursuing Performance Problems FREE CHAPTER 2. Scripting Strategies 3. The Benefits of Batching 4. Kickstart Your Art 5. Faster Physics 6. Dynamic Graphics 7. Virtual Velocity and Augmented Acceleration 8. Masterful Memory Management 9. Tactical Tips and Tricks

Consider caching Transform changes


The Transform Component stores data only relative to its own parent. This means that accessing and modifying a Transform Component's position, rotation, and/or scale properties can potentially result in a lot of unanticipated matrix multiplication calculations to generate the correct Transform representation for the object through its parent Transforms. The deeper the object is in the Hierarchy window, the more calculations are needed to determine the final result. 

However, this also means that using localPosition, localRotation, and localScale have a relatively trivial cost associated with them, since these are the values stored directly in the given Transform and can be retrieved without any additional matrix multiplication. Therefore, these local property values should be used whenever possible.

Unfortunately, changing our mathematical calculations from world-space to local-space can over-complicate what were originally simple (and solved) problems, so...

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