OpenSceneGraph3.0编程指南：高级3D技术解析

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"OpenSceneGraph3.0Cookbook PDF是一本关于OpenSceneGraph 3的数字文档，由Rui Wang和Xuelei Qian撰写，旨在教授高级3D编程技术。这本书由Packt Publishing出版，提供了80多个食谱来展示如何使用OpenSceneGraph API进行3D图形编程。" OpenSceneGraph (OSG) 是一个开源的高性能3D图形库，它提供了一整套用于创建交互式3D应用的工具和功能。OpenSceneGraph 3.0 Cookbook 是针对这个库的实践指南，适合已经对基础3D编程有一定了解并希望深入掌握OSG的开发者。书中包含的80多个“食谱”代表了具体的代码示例和解决方案，覆盖了从基本操作到复杂技术的广泛话题。这本书可能涵盖以下关键知识点： 1. **OpenSceneGraph基础**：介绍OSG的核心概念，如场景图、节点、几何对象、材质和纹理等，以及如何构建和管理3D场景。 2. **渲染与视图控制**：讲解如何设置相机视角，实现视口分割，以及处理光照和阴影效果，还包括高级渲染技术如多重采样抗锯齿和后期处理特效。 3. **动画与交互**：讨论如何实现动态物体、骨骼动画和角色运动，以及如何通过鼠标和键盘事件进行用户交互。 4. **性能优化**：介绍内存管理和渲染性能提升策略，如批处理、LOD（细节层次）和空间划分结构。 5. **扩展与插件**：讲解如何编写自定义节点、行为和渲染算法，以及如何利用OSG的插件系统来集成第三方库。 6. **网络与多线程**：讨论如何在分布式环境中使用OSG，实现网络同步和多线程渲染。 7. **物理模拟**：介绍如何集成物理引擎，实现逼真的碰撞检测和物理行为。 8. **高级3D技术**：可能包括复杂的着色器语言GLSL的应用，高级纹理技术，以及立体视觉和增强现实的相关内容。 9. **实例项目**：书中的食谱会通过实际案例展示如何将这些技术应用到实际项目中，帮助读者巩固理论知识并提高实践能力。通过阅读这本Cookbook，读者不仅可以深入了解OpenSceneGraph的高级特性，还能获得解决实际问题的技巧和经验。不论是对游戏开发、科学可视化，还是虚拟现实应用感兴趣的开发者，都能从中受益。然而，由于这本书是2012年出版的，部分API和技术可能已经更新，读者在使用时可能需要结合最新的OSG版本进行适应和调整。

Preface

During the last 12 years, OpenSceneGraph, which is one of the best 3D graphics programming

interfaces in the world, has grown up so rapidly that it has already become the industry's

leading open source scene graph technology. The latest distribution, OpenSceneGraph 3.0,

now runs on all Microsoft Windows platforms, Apple Mac OS X, iOS (including iPhone and

iPad), GNU/Linux, Android, IRIX, Solaris, HP-UX, AIX, and FreeBSD operating systems, with

the efforts of 464 contributors around the world, and over 5,000 developers of the osg-users

mailing list/forum and diverse and growing communities.

In the year 2010, I wrote the book "OpenSceneGraph 3.0 Beginner’s Guide” with the help

of Dr. Xuelei Qian. It was published by Packt Publishing, and could help the readers gain

an overview of scene graphs and the basic concepts in OpenSceneGraph. But one book is

far less than enough, especially for those who want to continuously study this high-quality

library in depth and play with some state-of-art techniques. So the book "OpenSceneGraph

3 Cookbook” comes onto the scene, with over 80 recipes demonstrating how to make use of

some advanced API features and create programs for industrial demands.

In this book, we will work on different goals, which originate from actual projects and

customer needs, and try to make use of the cutting-edge graphics techniques, or integrate

with other famous and stable libraries to satisfy various multi-level and multi-aspect demands.

Some of the recipes are too long and too complicated to t into any of the chapters, so

they will only appear in the source code package, which can be downloaded from the Packt

website, or the author's Github repository as described later.

What this book covers

Chapter 1, Customizing OpenSceneGraph, introduces some advance topics about the

conguration and compilation, including build steps on mobile devices and the automatic

generation of the API documentation.

Chapter 2, Designing the Scene Graph, explains the management of scene graph, as well as

the implementation of user-node functionalities in various ways.

Preface

Chapter 3, Editing Geometry Models, shows how to create polygonal meshes and make them

animated. It also introduces some solutions for modifying existing geometric properties.

Chapter 4, Manipulating the View, discusses the topics of multi-screen and multi-view

rendering, and the camera manipulation using input devices such as the joysticks.

Chapter 5, Animating Everything, introduces almost all kinds of real-time animation

implementations as well as the integration of physics engines.

Chapter 6, Designing Creative Effects, discusses some cutting-edge techniques about

realistic rendering with GPU and shaders. It also demonstrates a common way to create

post-processing framework for complicated scene effects.

Chapter 7, Visualizing the World, is a totally independent chapter that demonstrates the

generation of landscape pieces and even the entire earth, using VirtualPlanetBuilder.

Chapter 8, Managing Massive Amounts of Data, shows some advanced ways to manage

massive data in OpenSceneGraph applications, with the help of some modern hardware

features such as occlusion query and draw instancing.

Chapter 9, Integrating with GUI, covers the integration of OpenSceneGraph and other graphics

user interfaces (GUI), including 2D and 3D widgets, mobile programs, and web browsers.

Chapter 10, Miscellaneous Discussion in Depth, introduces a few complicated demands that a

developer may face in actual situations, and provides in-depth solutions for them. This chapter

is not present in the book but is available as a free download at the following link: http://

www.packtpub.com/sites/default/files/downloads/6884_Chapter10.pdf

What you need for this book

To use this book, you will need a graphic card with robust OpenGL support, with the latest

OpenGL device driver installed from your graphics hardware vendor.

You will need to download OpenSceneGraph 3.0.1 from http://www.openscenegraph.

org

. Some recipes may require the latest developer version. The CMake utility is also

necessary for compiling OpenSceneGraph and the source code of this book. You may

download it from http://www.cmake.org/.

You will also need a working compiler which transforms C++ source code into executable les.

Some recommended ones include: gcc (on Unices), XCode (on Mac OS X), and mingw32 and

Visual Studio (on Windows).

Preface

Reader feedback

Feedback from our readers is always welcome. Let us know what you think about this

book—what you liked or may have disliked. Reader feedback is important for us to

develop titles that you really get the most out of.

To send us general feedback, simply send an e-mail to feedback@packtpub.com, and

mention the book title through the subject of your message.

If there is a topic that you have expertise in and you are interested in either writing or

contributing to a book, see our author guide on www.packtpub.com/authors.

Customer support

Now that you are the proud owner of a Packt book, we have a number of things to help you to

get the most from your purchase.

Downloading the example code

You can download the example code les for all Packt books you have purchased from

your account at http://www.packtpub.com. If you purchased this book elsewhere,

you can visit http://www.packtpub.com/support and register to have the les

e-mailed directly to you.

You can also download the latest version of the source code package at the author's GitHub

repository https://github.com/xarray/osgRecipes. All recipes of this book are

included in this link, as well as more OSG-related examples written by the author and

other contributors.

Errata

Although we have taken every care to ensure the accuracy of our content, mistakes do

happen. If you nd a mistake in one of our books—maybe a mistake in the text or the

code—we would be grateful if you would report this to us. By doing so, you can save other

readers from frustration and help us improve subsequent versions of this book. If you nd

any errata, please report them by visiting http://www.packtpub.com/support,

selecting your book, clicking on the errata submission form link, and entering the details

of your errata. Once your errata are veried, your submission will be accepted and the errata

will be uploaded to our website, or added to any list of existing errata, under the Errata section

of that title.

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