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CS 4731: Computer Graphics Lecture 1: Introduction

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

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CS 4731: Computer Graphics Lecture 1: Introduction

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  1. CS 4731: Computer GraphicsLecture 1: Introduction Emmanuel Agu

  2. 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

  3. 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

  4. 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

  5. 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

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

  7. 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

  8. 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??

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

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

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

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

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

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

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

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

  17. 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

  18. References • Hill, Chapter 1

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