CS 4731: Computer Graphics Lecture 1: Introduction Emmanuel Agu.

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Presentation transcript:

CS 4731: Computer Graphics Lecture 1: Introduction Emmanuel Agu

About This Course Course about Computer Graphics NOT a course in OpenGL OpenGL only used as example Concerned with how to build graphics tools Concerned with underlying mathematics Concerned with underlying data structures Concerned with underlying algorithms This course is a lot of work: Requires extensive coding You will really know C++ when done

Syllabus Summary 2 Exams (50%), 5 Projects (50%) Will use openGL Code base provided: miniGL Required to extend miniGL functionality Write code on any platform. Must run on CCC machines Can work in pairs, unique projects All slides, material on class website

Homeworks Many phases to homework: Understanding/design/coding/debugging/tesing Encouraged to work together Must only hand in your own work Cheating: Heavily frowned on Immediate NR in the course Advice: Come to class Keep up with the reading Make sure you understand before coding Homework 1 on website tomorrow

What is Computer Graphics Use a computer to create pictures Started early ’60s: Ivan Sutherland (MIT) SIGGRAPH conference: started 1969, 30,000 annually SIGGRAPH 2003: San Diego 18,000 Tools to make a picture Hardware tools Software tools

Tools Hardware tools Output devices: Video monitors, printers Input devices:Mouse/trackball, pen/drawing tablet, keyboard Software tools Operating system Editor Compiler Debugger

Motivation for CG Appealing pictures produced Humans respond better to pictorial information Human brain recognizes visual patterns “If it looks right, it is right”, Jim Blinn, CG pioneer

Reasons to study CG Better information presentation Job in computer graphics (games, movies, etc) New medium for artistic expression Communicate ideas better Get a grade??

Uses of Computer Graphics Art, entertainment, publishing: movies, TV, books, magazines, games Courtesy: Pixar.com,Quake3world.com

Uses of Computer Graphics Image processing: alter images, remove noise

Uses of Computer Graphics Process monitoring: large systems or plants Courtesy: Dataviews.de

Uses of Computer Graphics Display simulations: flight simulators, virtual worlds Courtesy: Evans and Sutherland

Uses of Computer Graphics Computer-aided design: architecture, electric circuit design Courtesy: cadalog.com

Uses of Computer Graphics Scientific analysis and visualization: molecular biology, weather, matlab, Mandelbrot set Courtesy: Human Brain Project, Denmark

CG use example Animated movies Toy story Finding Nemo Special effects Terminator 3 Matrix Reloaded

Elements of CG Polylines: connected straight lines (edges, vertices) Text: font, typeface Filled regions: colors, patterns Raster images: pixels have values (pixmap)

Computer Graphics Functions/routines to draw line or circle, etc Elaborate: pull-down menus, 3D coordinate system, etc Previously device-dependent Difficult to port Error Prone Now device-independent libraries APIs: OpenGL, DirectX, java3D

References Hill, Chapter 1