OpenGL Programming Guide Programming Guide > Chapter 1 Chapter 1 Introduction to OpenGL Chapter Objectives After reading this chapter, you'll be able to do the following: Appreciate in general terms what OpenGL does Identify different levels of rende…
openGL是一个强大的底层图形库,其命令最初的时候使用C语言实现的.openGL定义了一个图形程序接口,常用于制作处理三维图像,功能强大,调用方便,在图像处理十分受欢迎. 实现图形主要使用的是openGL的一个工具包:GLUT. GLUT (pronounced like the glut in gluttony) is the OpenGL Utility Toolkit, a window system independent toolkit for writing OpenGL prog…
Modern OpenGL用Shader拾取VBO内单一图元的思路和实现(3) 到上一篇为止,拾取一个VBO里的单个图元的问题已经彻底解决了.那么来看下一个问题:一个场景里可能会有多个VBO,此时每个VBO的gl_VertexID都是从0开始的,那么如何区分不同VBO里的图元呢? 指定起始编号 其实办法很简单.举个例子,士兵站成一排进行报数,那么每个士兵所报的数值都不同:这时又来了一排士兵,需要两排都进行报数,且每个士兵所报的数值都不同,怎么办?让第二排士兵从第一排所报的最后一个数值后面接着报就…
A Simple OpenGL Shader Example II eryar@163.com Abstract. The OpenGL Shading Language syntax comes from the C family of programming languages. Tokes, identifiers, semicolons, nesting with curly braces, control-flow, and many key words look like C. GL…
This function load a LithTech *.dtx texture file and convert to OpenGL pixel format, compressed support. Use FileSystem interface. :D #pragma pack(1) struct DtxHeader { unsigned int iResType; int iVersion; unsigned short usWidth; unsigned short usHei…
Update 10/24/12: If you’d like a new version of this tutorial fully updated for iOS 6 and Xcode 4.5, check out iOS 5 by Tutorials Second Edition! Note from Ray: This is the fourth iOS 5 tutorial in the iOS 5 Feast! This tutorial is a free preview cha…