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Introduction to Computer Graphics
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Introduction to Computer Graphics

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  1. Introduction to Computer Graphics • Syllabus Handout • Goal of Course • Software - C/C++, OpenGL • Hardware - Unix, Windows, NT, Mac • Who you are and what you want from the course 480/580 Lecture 1

  2. Definition of Computer Graphics • Computer aided synthesis of pictures from non-pictoral form • Subfields and related fields Symbols Structures Images Signals 480/580 Lecture 1

  3. Reasons for CG • User can take in more information • Tables versus graphs • Easy to make changes • Circuit design • Can simulate • Auto design • Flight simulators - http://berkelium.com/OpenGL/flight.html • Can do the impossible • Not obey the laws of physics – ILM’s “Come Home” • http://www.ilmcp.com/home_index.html • Captain Kirk and USS Enterprise travel through spiral interior of DNA molecule 480/580 Lecture 1

  4. Motivations for Development • Manufacturing industry • CAD/CAM - http://www.cadsystems.com/profiles/0106_virtualplant.html • 777 design – http://www.boeing.com/commercial/777family/cdfacts.html • Circuit design and layout - http://www.automationstudio.com/ • Flight Simulators • Initial single biggest motivator for realism • Training – simulated crash vs. actual crash • Simulate combat – 5 missions • Realism – on ground simulators • In plane goggles and runway 2000 feet up • Low level flight – cactus spines 480/580 Lecture 1

  5. More motivations • Motion Picture Industry • TRON, Star Wars, Twister, Perfect Storm, Jurassic Park III - http://cgw.pennnet.com/Articles/Article_Display.cfm?Section=Articles&Subsection=Display&ARTICLE_ID=108471 • Amazingly difficult to produce • Toy Story • SGI hardware • Pixar software and production techniques • James and the Giant Peach • 14.5 min of CG animation • 9 months of work by Sony Pictures Image Works team 480/580 Lecture 1

  6. More motivations • Video Games - http://graphics.stanford.edu/ • Music Videos • Morphing – transform one object into another - http://graphics.stanford.edu/cgi-bin/alumni/tolis/personal/getpage.cgi?morph.html • Presentation Graphics • Videos, 35 mm slides, transparencies, reports • Bar charts, line graphs, surface graphs, pie charts • Computer Art • Paintbrush programs • Graphics tablet (digitizer) • Stylus (brush shapes, sizes, colors) • http://cgw.pennnet.com/Articles/Article_Display.cfm?Section=Articles&Subsection=Display&ARTICLE_ID=108502 • Commercial art • Fine art 480/580 Lecture 1

  7. More Motivations • Education and Training • Computer generated models • Simulators - http://www.virtual-u.org/ • Virtual education - http://online.phoenix.edu/ • Visualization • Business visualization • View data sets • Scientific visualization • Genomics - http://www.neurophys.wisc.edu/~cozzi/2cb.html • Computer vision - http://www.vasc.ri.cmu.edu/demos/facedemo.html 480/580 Lecture 1

  8. Why so Hard? • Computationally expensive • Still developing new algorithms for realism • Regular objects easy • Surface of revolution • Surface texture • Toys vs people • Orange vs ping pong ball • Texture mapping 480/580 Lecture 1

  9. Why so Hard, cont. • Imperfections • Blemishes – woodwork in Toy Story • Reflectivity • Plastic versus rainbow • Matt surfaces versus specular surfaces • Motion • Model by hand – animators and key frames • Model by physical equations • Motion capture • http://cgw.pennnet.com/Articles/Article_Display.cfm?Section=Articles&Subsection=Display&ARTICLE_ID=108465 • Fur, Fire, Fern Fun • Dynamic systems - http://cgw.pennnet.com/Articles/Article_Display.cfm?Section=Articles&Subsection=Display&ARTICLE_ID=108473 • “grow” the processes – particle systems, etc 480/580 Lecture 1