Historical Perspective Perception of Images in Motion Conventional Animation Early Disney Stop Motion History of Computer Animation Perception Positive afterimage: imprint of image in the visual system just viewed (look into flash of a camera) Our brain sees a sequence of images as motion persistence of vision: lower limit for continuous viewing flicker rate: rate of playback in order to achieve continuous illusion (depends on lighting, viewing distance etc.) flicker: perception of continuous imagery fails playback rate: (related to flicker) number of images displayed per second motion blur: movement is too quick to track. Doesn’t come automatically in animation strobing: too fast movement of object in animation, where motion blur in not considered sampling rate: (related to strobing) number of different images per second not every displayed frame needs to be re-drawn/rendered from scratch Convential Animation – Early Hand-drawn, 2D images George Melies (1896) – multiple exposure and stop-motion – make objects (dis)appear, change shape Pioneers in film animation: Emile Cohl, J. Stuart Blackton – animation of smoke (special FX) in 1900 – first animated cartoon in 1906 Winsor McCay – first celebrated animator – 1911 - Little Nemo – 1914 - Gertie the Dinosaur VAN EATON GALLERIES, SHERMAN OAKS, CA – redrew each complete image and filmed individually – early cartoons included live action with animated characters (rotoscope) John Bray – major technical developments – patents of techniques – 1914: use of translucent cels (compositing of multiple layers) – peg system for registration (simplify panning - parallel movement of camera to drawings) From Bray’s studios: – Max Fleischer (Betty Boop) – Paul Terry (Terrytoons) – George Stallings (Tom and Jerry) – Walter Lantz (Woody Woodpecker, Chilly Willy) Convential Animation: Disney Walt Disney – many technical innovations – advancing the art form – storyboard to review – pencil sketches to review motion – first sound - Steamboat Willie (1928) Major innovation - multiplane camera (p8, Parent) – each plane moves in 6 directions – camera can move closer or farther – more effective zoom – illusion of depth and a 3D sense – motion blur (camera lens stays open) Disney created unique personalities – Mickey Mouse, Pluto, Goofy, … – mind of the character is the driving force developed mood pieces: Fantasia (1940) Convential Animation - Stop Motion 1930s - proliferation of animation studios Willis O’Brian - King Kong (1933) Ray Harryhausen - Mighty Joe Young (1949), Jason and the Argonauts (1963), Sindbad and the Eye of the Tiger (1977), Clash of the Titans (1981) Tim Burton - Nightmare Before Christmas (1993), James and the Giant Peach (1996) Nick Park (clay-mation) - Wallace and Gromit (1992-1995) Computer Graphics & Animation (Excerpts from an online resource http://accad.osu.edu/~waynec/history/timeline.html ) 1941 First U.S. regular TV broadcast 1953 NTSC broadcast code 1961 Spacewars, 1st video game, developed by Steve Russell at MIT for the PDP-1 1963 Sketchpad developed beginning in 1961 by Ivan Sutherland at MIT is unveiled Source: Sun Microsystems Roberts hidden line algorithm (MIT) 1964 Electronic character generator 1967 Steven Coons publishes his surface patch "little red book" 1968 Intel founded Evans & Sutherland, Houston Instrument, founded 1969 SIGGRAPH formed (began as special interest committee in 1967 by Sam Matsa and Andy vanDam) 1971 Gouraud shading (Henri Gouraud, Continuous Shading of Curved Surfaces) 1972 C language developed by Ritchie Newell, Newell and Sancha visible surface algorithm (A Solution to the Hidden Surface Problem.) video game Pong developed for Atari Source: Atari Rich Riesenfeld (Syracuse) introduces bsplines for geometric design 1974 z-buffer developed by Ed Catmull (University of Utah) 1975 Phong shading - Bui-Toung Phong (University of Utah) fractals - Benoit Mandelbrot (IBM) Bill Gates starts Microsoft 1976 N. Burtnyk , M. Wein, Interactive skeleton techniques for enhancing motion dynamics in key frame animation Jim Blinn develops reflectance and environment mapping (University of Utah) 1977 Apple Computer incorporated Frank Crow introduces antialiasing Jim Blinn introduces a new illumination model that considers surface "facets" Larry Cuba produces Death Star simulation for Star Wars using Grass at UICC developed by Tom DeFanti at Ohio State 1978 Bump mapping introduced (Blinn) (Simulation of wrinkled surfaces) 1980 Turner Whitted of Bell Labs publishes ray tracing paper Disney contracts Abel, III, MAGI and DE for computer graphics for the movie Tron 1981 REYES renderer written at LucasFilm 1982 Jim Clark founds Silicon Graphics Inc. Sun Microsystems founded (SUN := Stanford University Network) Skeleton Animation System (SAS) developed at CGRG at Ohio State (Dave Zeltzer) Tom Brighham develops morphing (NYIT) Adobe founded by John Warnock AutoDesk founded; AutoCAD released 1983 Particle systems (William T. Reeves Lucasfilm) Non-Uniform Rational B-Splines (NURBS) introduced by Tiller (Note: this date is somewhat misleading, since the concept built on the work of Vesprille (1975), Riesenfeld (1973), Knapp (1979), Coons (1968) and Forrest (1972)) 1984 Wavefront Technologies is the first commercially available 3D software package (founded by Mark Sylvester, Larry Barels and Bill Kovacs) Distributed ray tracing introduced by Lucasfilm (Robert L. Cook, Thomas Porter and Loren Carpenter.) Cook shading model (Lucasfilm) (Robert L. Cook) Radiosity born - Cornell University (Cindy M. Goral, Kenneth E. Torrence, Donald P. Greenberg and Bennett Battaile) John Lasseter joins Lucasfilm Lucasfilms introduces motion blur effects Porter and Duff compositing algorithm (Lucasfilm) (Thomas Porter and Tom Duff) 1985 Perlin's noise functions introduced (Ken Perlin) 1986 Pixar purchased from Lucasfilm by Steve Jobs Luxo Jr. nominated for Oscar (first CGI film to be nominated - Pixar) 1987 GIF format (CompuServe), JPEG format (Joint Photographic Experts Group) Reynolds' flocking behavior algorithm (Symbolics) (Craig W Reynolds) Source: Craig Reynolds 1988 Disney and Pixar develop CAPS (Computer Animation Paint System) (academy technical award in 1992) 1989 mental ray renderer released (integrated with Wavefront (1992), Softimage (1993), Maya (2002)) PIXAR starts marketing RenderMan 1990 3D Studio (AutoDesk) 1991 World Wide Web (CERN) 1992 OpenGL (SGI) released 1995 Wavefront and Alias merge 1998 Alias Maya released 2001 Microsoft xBox and Nintendo Gamecube released 2003 Alias/Wavefront becomes Alias 2004 Cmpt 466 …..