Out now!
2D SHADER
DEVELOPMENT
PROCEDURAL TEXTURE MANIPULATION
Make your games unique in a world full of lookalikes by leveraging the power of shaders.
Procedural Texture Manipulation is the third in a series of 4 books and will teach you techniques you can use to draw and modify textures with code.
Table of Contents

Introduction to the series
 Motivation for the series
 I use Unity, why should I bother learning shader programming at all?
 Who are these books for?
 I need help! What can I do?
 Downloading the source code for the book
 Introduction to Procedural Texture Manipulation

Drawing with math: Lines, Functions, and Rectangles

The basics
 Step
 Smoothstep
 Plotting functions

Basic shapes
 Line
 Rectangles
 Circle
 Triangles and nside polygons

Transformations
 Scaling
 Translation
 Rotating
 Composition of basic shapes
 Combining shapes
 Subtracting shapes
 Masking
 Composition

Exercise 1
 Add thickness to
plot
 Add softness to
plot
 Create a rotated soft rectangle
 Add thickness to

The basics

Image deformations

Basic
uv
deformations Starting point
 Translate
 Scale (Zoom)
 Stretch
 Translate overflow fix
 Rotate
 Deforming with trigonometric functions
 Chroma aberration, playing with RGBA channels

Tampering with the resolution
quantization  Resolution change

Using masks

Handrolled masks
 Masks using RGB channels

Handrolled masks
 Exercise 2

Basic

Animating deformations
 Using masks in animation
 Easing
 Exercise 3
 Where to go now
 Acknowledgements
 Credits

Exercise 1 Solution

Add thickness to
plot
 Add softness to
plot
 Create a rotated soft rectangle
 Add softness to

Add thickness to
 Exercise 2 Solution

Exercise 3 Solution
 Flag pole
 Static Crowie
 Animating Crowie

Appendix I: Gallery of Shaping (Easing) Functions
 Step and Smoothstep
fmod
(Modulo, or remainder) Fractional part
 Ceil / Floor
 Power of
n
clamp

Appendix II: Signed Distance Fields
 Circle
 Square
 Composition of Distance Fields

Appendix III: Polar Coordinates
 Going back to cartesian coordinates
 Appendix IV: Quantization