OpenGL Graphics. What Is OpenGL? 1. C-Based graphics framework. 2. Open specification. 3. State machine. 4. Rendering pipeline. 5. A whole load of maths.

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Presentation transcript:

OpenGL Graphics

What Is OpenGL? 1. C-Based graphics framework. 2. Open specification. 3. State machine. 4. Rendering pipeline. 5. A whole load of maths.

OpenGL Version History OpenGL 1.x - Graphics Courses - Fixed Functionality Pipeline OpenGL 2.x - Fixed Functionality Pipeline - Programmable Pipeline OpenGL 3.x - Programmable Pipeline (Only!)

gl.h Most basic, low level API functions. glu.h Functions here are for convienance and use gl.h. glut.h A quick, cross-platform way of drawing to the screen.

glew.h Allows easy access to OpenGL extensions. glTools.h A set of convenient functions to get yourself going with the new OpenGL.

Open Specification Multiple companies. Multiple platforms. Multiple programming languages.

State Machine glEnable() glDisable() glEnableClientState() glDisableClientState() glBegin() glEnd()

Rendering Pipeline

Maths Geometry Coordinates Vectors Matricies

Demo

Reading Toby Howard's "Green OpenGL Guide". OpenGL SuperBible 4th Edition OpenGL SuperBible 5th Edition OpenGL Programming Guide

Questions?

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