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2D Shader Development 01 Foundations 1st edition by Francisco Tufro B07BGYF7F8

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ISBN 10: B07BGYF7F8

Author: Francisco Tufro

Our games need to look unique. There’s nothing we can do to fight that. Good artists are great at creating amazing characters and environments but programmers can open a whole new world of possibilities and customization by leveraging the power of shaders.

About Foundations

This book is the first in a series of 4 books and will provide you with the basic understanding of what a shader is, why we need them, how colors are represented, how to display a texture on screen, and how to mix colors using blending modes.

About the series

In the past few years, while working on Nubarron, I got really frustrated about the lack of information on how to design shader effects in 2D. Most of the books and tutorials are about 3D, and one may thing that transfering that knowledge to 2D is easy. Well.. not really.

I found out that there is a sub-set of basic techniques that are pretty useful in 2D, and don’t require you to learn a lot of the 3D stuff, specially lighting models, the first thing that every shader tutorial/book talks about.

The series is aimed at independent game developers that want to make their own 2D games visually unique. You’ll need some understanding on programming. If you can code your own logic in C# scripts inside Unity you’re good to go.

If you haven’t coded a game in the past it’s likely that these books are not for you. I suggest you take an introductory Unity course first, work on some prototypes until you’re comfortable with programming and then read the books.

The series will help you differentiate your games from others that use nothing but built-in shaders, make use of the GPU to generate movement and effects on static sprites, generate full-screen effects and learn techniques to do illumination on 2D scenes.

2D Shader Development 01 Foundations 1st Table of contents:

  1. Introduction

1.1 Motivation for the Series
1.2 Why Learn Shader Programming with Unity?
1.3 Target Audience
1.4 Getting Help
1.5 Series Overview: – 1.5.1 Foundations – 1.5.2 Illumination & Shadows – 1.5.3 Procedural Texture Manipulation – 1.5.4 Full-Screen Effects
1.6 Accessing the Source Code for Exercises

2. 2D Illumination

2.1 Importance of Illumination
2.2 Static Illumination Techniques
– 2.2.1 Additive Blending for Lighting – 2.2.2 Particle Effects – 2.2.3 Multiply Blending for Shadows – 2.2.4 Limitations of Static Illumination
2.3 Exercise 1: Implement Static Lighting and Shadows
2.4 Conclusion on Static Lighting

3. Dynamic Local Ambient Lights

3.1 Creating 2D Light Sources
– 3.1.1 Ambient, Directional, and Point Lights – 3.1.2 Building Light Prefabs – 3.1.3 Object Coloring and Culling Notes – 3.1.4 Full Shader Code for Ambient Lighting
3.2 Applying TextureWithAmbientLight Shader to Characters
– 3.2.1 Adjusting Gradient with _Threshold and _Smoothness
3.3 Exercise 2: Directional Lights Implementation
3.4 Point Lights and Interpolation
3.5 Conclusion on Local Ambient Lighting

4. Screen-Space Automatic Rim Lights

4.1 Alpha-Only Rendering
– 4.1.1 Scene Setup and RenderTexture – 4.1.2 Alpha Channel Rendering
4.2 Normal Map Generation
– 4.2.1 Image Blurring and Normal Map Creation
4.3 Exercise 3: Implementing Screen-Space Rim Lighting
4.4 Conclusion on Rim Lighting

5. Dynamic Lights with Normal Mapping

5.1 Requirements and Math for Normal Mapping
5.2 Normal Map Generation in Shaders
5.3 Using Unity’s Built-In Lights
5.4 Exercise 4: Normal Map Application
5.5 Conclusion on Normal Mapped Lighting

6. Additional Resources

6.1 Next Steps in the Series
– 6.1.1 Procedural Texture Manipulation – 6.1.2 Full-Screen Effects
6.2 Further Learning: Online Resources and Books

7. Acknowledgements & Credits

7.1 Solution to Exercises
– 7.1.1 Exercise 1: Static Illumination and Shadows – 7.1.2 Exercise 2: Directional Lights – 7.1.3 Exercise 3: RimLights Shader Implementation – 7.1.4 Exercise 4: Normal Mapping with Angle Control

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