2D Shader Development

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.

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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 n-side 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
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
- Resolution change
- Using masks
  - Hand-rolled masks
    - Masks using RGB channels
- Exercise 2
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
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

Table of Contents