精通Android的OpenGL ES编程

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"Pro_OpenGL_ES_for_Android 英文非扫描版" 本书是关于OpenGL ES在Android平台上的应用的专业指南，旨在帮助读者深入理解并熟练掌握OpenGL ES的使用，从而在Android设备上创建高性能的图形应用程序。OpenGL ES是OpenGL的一个轻量级版本，专为嵌入式系统设计，如智能手机和平板电脑，用于处理2D和3D图形。书中的内容涵盖了计算机图形学的基础，从早期的发展到现代技术的演变。作者首先介绍了计算机图形学的历史，然后逐步引导读者进入数学基础，这是理解图形编程的关键。这些数学概念包括向量、矩阵运算，以及在3D空间中进行坐标变换的基础知识。在深入到3D图形之前，书本还讨论了2D图形的处理，这是很多游戏和应用程序的基础。接着，作者详细讲解了如何添加光照效果，这是使3D模型看起来更真实的关键步骤。纹理贴图章节则介绍了如何应用图像到3D模型表面，以增加细节和视觉吸引力。 "Will It Blend?"章节可能涉及混合模式和透明度处理，这对于创建复杂的场景和动画至关重要。"Well-Rendered Miscellany"章节则涵盖了一些高级话题，可能包括渲染优化、错误处理和调试技巧，这些都是开发高效图形应用时需要考虑的因素。随着内容的推进，作者在第10章引入了OpenGL ES 2.0和着色器的概念，这是OpenGL ES的一个重大进步，允许开发者编写更复杂的图形处理代码，实现更强大的图形效果。最后，性能优化和相关主题的讨论，帮助开发者理解如何最大化利用硬件资源，提供流畅的用户体验。此外，书中还包括了对技术审阅者的介绍、致谢部分，以及一个详细的索引，方便读者查找特定的主题。这个非扫描版的电子书使得阅读和导航更加便捷，读者可以通过书签和目录快速定位到所需的内容。 "Pro_OpenGL_ES_for_Android"是一本全面而深入的教程，适合希望在Android平台上开发图形密集型应用的开发者，无论是初学者还是有经验的程序员，都能从中受益。通过学习本书，读者可以掌握创建引人入胜的2D和3D图形应用所需的全部技能。

CHAPTER 1: Computer Graphics: From Then to Now

A Spotty History of Computer Graphics

To say that 3D is all the rage today is at best an understatement. Although forms of “3D” imagery go

back to more than a century ago, it seems that it has finally come of age. First let’s look at what 3D is

and what it is not.

3D in Hollywood

In 1982 Disney released Tron, the first movie to widely use computer graphics depicting life inside a

video game. Although the movie was a critical and financial flop, it would eventually join the ranks of

cult favorites right up there with The Rocky Horror Picture Show. Hollywood had taken the bite out of

the apple, and there was no turning back.

Stretching back to the 1800s, what we call “3D” today was more commonly referred to as stereo

vision. Popular Victorian-era stereopticons would be found in many parlors of the day. Consider this

technology an early Viewmaster. The user would hold the stereopticon up to their face with a stereo

photograph slipped into the far end and see a view of some distant land, but in stereo rather than a flat

2D picture. Each eye would see only one half of the card, which carried two nearly identical photos

taken only a couple of inches apart.

Stereovision is what gives us the notion of a depth component to our field of view. Our two eyes

deliver two slightly different images to the brain that then interprets them in a way that we understand

as depth perception. A single image will not have that effect. Eventually this moved to movies, with a

brief and unsuccessful dalliance as far back as 1903 (the short L’arrivée du Train is said to have had

viewers running from the theater to avoid the train that was clearly heading their way) and a

resurgence in the early 1950s, with Bwana Devil being perhaps the best known.

The original form of 3D movies generally used the “anaglyph” technique that required the viewers to

wear cheap plastic glasses with a red filter over one eye and a blue one over the other. Polarizing

systems were incorporated in the early 1950s and permitted color movies to be seen in stereo, and

they are still very much the same as today. Afraid that television would kill off the movie industry,

Hollywood needed some gimmick that was impossible on television in order to keep selling tickets, but

because both the cameras and the projectors required were much too impractical and costly, the form

fell out of favor, and the movie industry struggled along just fine.

With the advent of digital projection systems in the 1990s and fully rendered films such as Toy Story,

stereo movies and eventually television finally became both practical and affordable enough to move it

beyond the gimmick stage. In particular, full-length 3D animated features (Toy Story being the first)

made it a no-brainer to convert to stereo. All one needed to do was simply rerender the entire film but

from a slightly different viewpoint. This is where stereo and 3D computer graphics merge.

CHAPTER 1: Computer Graphics: From Then to Now

University of Utah

Recruited by the University of Utah in 1968 to work in its computer science program, Sutherland

naturally concentrated on graphics. Over the course of the next few years, many computer graphics

visionaries in training would pass through the university’s labs.

Ed Catmull, for example, loved classic animation but was frustrated by his inability to draw—a

requirement for artists back in those days as it would appear. Sensing that computers might be a

pathway to making movies, Catmull produced the first-ever computer animation, which was of his

hand opening and closing. This clip would find its way into the 1976 film Future World.

During that time he would pioneer two major computer graphics innovations: texture mapping and

bicubic surfaces. The former could be used to add complexity to simple forms by using images of

texture instead of having to create texture and roughness using discrete points and surfaces, as

shown in Figure 1–5. The latter is used to generate algorithmically curved surfaces that are much

more efficient than the traditional polygon meshes.

Figure 1–5.

Saturn with and without texture

Catmull would eventually find his way to Lucasfilm and, later, Pixar and eventually serve as president

of Disney Animation Studios where he could finally make the movies he wanted to see. Not a bad gig.

Many others of the top names in the industry would likewise pass through the gates of University of

Utah and the influence of Sutherland:

 John Warnock, who would be instrumental in developing a device-independent

means of displaying and printing graphics called PostScript and the Portable

Document Format (PDF) and would be cofounder of Adobe.

 Jim Clark, founder of Silicon Graphics that would supply Hollywood with some of

the best graphics workstations of the day and create the 3D framework now

known as OpenGL. After SGI he cofounded Netscape Communications, which

would lead us into the land of the World Wide Web.

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精通Android的OpenGL ES编程

( Pro OpenGL ES for Android Part2.zip )

Android OpenGL ES简明学习资料

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Pro OpenGL ES for Android

Pro Opengl Es for Android 代码

Android 3D游戏开发书籍(Pro_Android_Games)

pro-opengl-es-for-android:Mike Smithwick和Mayank Verma的“适用于Android的Pro OpenGL ES”的源代码-android source code

Pro_Android_Games%28code%29.zip

Apress.Pro OpenGL ES for Android.2012

Apress.Pro.OpenGL.ES.for.Android.2012

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