《iPhone 3D 编程》第一章：快速入门指南

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内容：《iPhone 3D 编程》第一章：快速入门指南

原文地址：http://ofps.oreilly.com/titles/9780596804824/chquick.html 译文地址：http://blog.csdn.net/favormm/article/details/6888328

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第一章：快速入门指南

        在本章，将从零基础开始，教你学会编写第一个应用程序。这个应用程序就是”HelloArrow”, 它绘制了一个箭头符号， 并能随着朝向的改变而旋转。你将学会如何用OpenGL ES 的API来绘制箭头，而OpenGL ES只是iPhone所支持的图形技术中的一种，于是在开始开发之前你可能会有困惑，哪一门图形技术是你所需要的？其实并没有明显的区分，某一技术是iPhone专有的，而某一技术归属于Mac OX开发的。

        苹果公司把iPhone的公有API架构为四层：Cocoa Touch, Media Services, Core Services, and CoreOS,使其简单明了。Mac OS X的架构则的许多延伸，但是任然可以笼统的分为四层，如图1.1。