Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Hands-On C++ Game Animation Programming

You're reading from   Hands-On C++ Game Animation Programming Learn modern animation techniques from theory to implementation with C++ and OpenGL

Arrow left icon
Product type Paperback
Published in Jun 2020
Publisher Packt
ISBN-13 9781800208087
Length 368 pages
Edition 1st Edition
Languages
Tools
Concepts
Arrow right icon
Author (1):
Arrow left icon
Gabor Szauer Gabor Szauer
Author Profile Icon Gabor Szauer
Gabor Szauer
Arrow right icon
View More author details
Toc

Table of Contents (17) Chapters Close

Preface 1. Chapter 1: Creating a Game Window 2. Chapter 2: Implementing Vectors FREE CHAPTER 3. Chapter 3: Implementing Matrices 4. Chapter 4: Implementing Quaternions 5. Chapter 5: Implementing Transforms 6. Chapter 6: Building an Abstract Renderer 7. Chapter 7: Exploring the glTF File Format 8. Chapter 8: Creating Curves, Frames, and Tracks 9. Chapter 9: Implementing Animation Clips 10. Chapter 10: Mesh Skinning 11. Chapter 11: Optimizing the Animation Pipeline 12. Chapter 12: Blending between Animations 13. Chapter 13: Implementing Inverse Kinematics 14. Chapter 14: Using Dual Quaternions for Skinning 15. Chapter 15: Rendering Instanced Crowds 16. Other Books You May Enjoy

Reading data from textures

This section explores how animation data stored in textures can be retrieved in a shader. In this section, you will learn how to sample the texture and what sampler states should be used when sampling the texture.

Once the data is in the right format, sampling it becomes the next challenge. The glTexImage2D function expects normalized uv coordinates and returns a normalized value. On the other hand, the texelFetch function can be used to sample a texture using pixel coordinates and return the raw data at those coordinates.

The texelFetch glsl takes three arguments: a sampler, an ivec2, and an integer. ivec2 is the x and y coordinates of the pixel being sampled, in pixel space. The last integer is the mip level to use, which, for this chapter, will always be 0.

A mipmap is a chain of progressively lower resolution versions of the same image. When a mip level is scaled down, data is lost. This data loss alters the contents of the animation. Avoid...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime