Unityshader秘籍：打造惊艳视觉效果

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《Unity Shaders and Effects Cookbook》是一本由Kenny Lammers编著的专业书籍，专为Unity开发人员量身打造。该书旨在帮助读者深入了解并掌握如何利用Unity中的Shader和屏幕效果提升项目的视觉表现力，使其呈现出惊艳的效果。Shader在Unity中扮演着关键角色，它们是游戏引擎中的程序化图形处理技术，允许开发者直接在GPU上编写图形逻辑，从而实现高度定制化的渲染和视觉效果。书中涵盖了丰富的内容，包括但不限于以下几个方面： 1. **Shader基础知识**：介绍了Unity的Shader系统，特别是ShaderLab语言，这是一种基于GLSL（OpenGL Shading Language）的简化版本，适合Unity开发环境。读者将学习如何创建基本材质、贴图和光照模型，以及如何通过Shader控制物体的表面属性如颜色、透明度和反射。 2. **高级Shader技术**：深入探讨了更复杂的Shader技术，如顶点后处理、像素着色器的优化、实时粒子系统、体积光和屏幕空间效果等，这些技术有助于实现逼真的物理效果和动画。 3. **视觉艺术与设计**：书中不仅涉及技术层面，还讨论了如何结合艺术设计原则来创作出吸引人的视觉效果，包括色彩理论、纹理设计和性能优化策略。 4. **实战项目**：书中包含一系列实际项目，让读者能够将所学知识应用于实践中，通过解决实际问题来巩固技能。 5. **版权与法律注意事项**：在享用和分享这本书时，强调了版权法的重要性，确保所有内容的合法使用，并提醒读者关于复制、存储和传播的限制。《Unity Shaders and Effects Cookbook》是一本既实用又富有深度的教程，对于希望提升Unity项目视觉表现的开发人员来说，无论是初级用户还是经验丰富的专业人士，都能从中获得宝贵的知识和灵感。通过本书的学习，开发者可以提升项目质量，为玩家带来更加沉浸式的游戏体验。

Preface

Errata

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Diffuse Shading

To achieve a basic diffuse lighting model, we will have to create a Shader that will include an

emissive color, an ambient color, and the total light accumulated from all light sources. The

following recipes show you how to build up a complete diffuse lighting model, and also show

some various industry tricks that come in handy for creating more complicated diffuse models

using only textures.

By the end of this chapter you will have learned how to build basic Shaders that perform

basic operations. Armed with this knowledge, you will be able to create just about any

Surface Shader.

Creating a basic Surface Shader

As we progress further into the recipes in this book, it is important that you know how to set

up your workspace in Unity, so that you can work efciently, and without any pain. If you are

already quite familiar with creating Shaders and setting up Materials in Unity 4, you may skip

this recipe. It is here to ensure that newcomers to surface shading in Unity 4 can work with

the rest of the recipes.

Getting ready

To get started with this recipe, you will need to have Unity 4 running, and must have created a

new project. There will also be a Unity project included with this cookbook, so you can use that

one as well and simply add your own custom Shaders to it, as you step through each recipe.

With that completed, you are now ready to step into the wonderful world of real-time shading!

How to do it…

Before getting into our rst Shader, let's create a small scene for us to work with. This can be

done by going to GameObject | Create Other in the Unity editor. From there you can create

a plane, to act as a ground, a couple of spheres, to which we will apply our Shader, and a

directional light to give the scene some light. With our scene generated, we can move onto

the Shader writing steps:

1. In the Project tab in your Unity editor, right-click on the Assets folder and select

Create | Folder.

If you are using the Unity project that came with the cookbook,

you can skip to step 4.

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