E-Book Overview
A Specification (Version 2.0 - October 22, 2004)Editor (version 1.1): Chris FrazierEditor (versions 1.2-1.5): Jon LeechEditors (version 2.0): Jon Leech and Pat Brown1992-2004 Silicon Graphics, Inc. - 382 p.
This document describes the OpenGL graphics system: what it is, how it acts, and what is required to implement it. We assume that the reader has at least a rudi-mentary understanding of computer graphics. This means familiarity with the es-sentials of computer graphics algorithms as well as familiarity with basic graphics hardware and associated terms.
E-Book Content
R The OpenGL Graphics System: A Specification (Version 2.0 - October 22, 2004) Mark Segal Kurt Akeley Editor (version 1.1): Chris Frazier Editor (versions 1.2-1.5): Jon Leech Editors (version 2.0): Jon Leech and Pat Brown c 1992-2004 Silicon Graphics, Inc. Copyright This document contains unpublished information of Silicon Graphics, Inc. This document is protected by copyright, and contains information proprietary to Silicon Graphics, Inc. Any copying, adaptation, distribution, public performance, or public display of this document without the express written consent of Silicon Graphics, Inc. is strictly prohibited. The receipt or possession of this document does not convey any rights to reproduce, disclose, or distribute its contents, or to manufacture, use, or sell anything that it may describe, in whole or in part. U.S. Government Restricted Rights Legend Use, duplication, or disclosure by the Government is subject to restrictions set forth in FAR 52.227.19(c)(2) or subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or in similar or successor clauses in the FAR or the DOD or NASA FAR Supplement. Unpublished rights reserved under the copyright laws of the United States. Contractor/manufacturer is Silicon Graphics, Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043. OpenGL is a registered trademark of Silicon Graphics, Inc. Unix is a registered trademark of The Open Group. The ”X” device and X Windows System are trademarks of The Open Group. Contents 1 2 Introduction 1.1 Formatting of Optional Features . . . . 1.2 What is the OpenGL Graphics System? 1.3 Programmer’s View of OpenGL . . . . 1.4 Implementor’s View of OpenGL . . . . 1.5 Our View . . . . . . . . . . . . . . . . 1.6 Companion Documents . . . . . . . . . . . . . . . OpenGL Operation 2.1 OpenGL Fundamentals . . . . . . . . . . 2.1.1 Floating-Point Computation . . . 2.2 GL State . . . . . . . . . . . . . . . . . . 2.3 GL Command Syntax . . . . . . . . . . . 2.4 Basic GL Operation . . . . . . . . . . . . 2.5 GL Errors . . . . . . . . . . . . . . . . . 2.6 Begin/End Paradigm . . . . . . . . . . . 2.6.1 Begin and End . . . . . . . . . . 2.6.2 Polygon Edges . . . . . . . . . . 2.6.3 GL Commands within Begin/End 2.7 Vertex Specification . . . . . . . . . . . . 2.8 Vertex Arrays . . . . . . . . . . . . . . . 2.9 Buffer Objects . . . . . . . . . . . . . . . 2.9.1 Vertex Arrays in Buffer Objects . 2.9.2 Array Indices in Buffer Objects . 2.10 Rectangles . . . . . . . . . . . . . . . . . 2.11 Coordinate Transformations . . . . . . . 2.11.1 Controlling the Viewport . . . . . 2.11.2 Matrices . . . . . . . . . . . . . . 2.11.3 Normal Transformation . . . . . . i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .