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VIST 375

VIST 375. Foundations Visualization 11/9/16 Notes. Animation. Computer Assisted Computer Based Conventional drawn, cel, clay, paper, pin grid,. Conventional Animation. History Pencil and paper - drawn animation Stop Motion - physical models Cel Animation

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VIST 375

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  1. VIST 375 Foundations Visualization 11/9/16 Notes Visualization Laboratory, Texas A&M University

  2. Animation • Computer Assisted • Computer Based • Conventional • drawn, cel, clay, paper, pin grid,... Visualization Laboratory, Texas A&M University

  3. Conventional Animation • History • Pencil and paper - drawn animation • Stop Motion - physical models • Cel Animation • Background and transparent layers • Animation stand Visualization Laboratory, Texas A&M University

  4. Animation Process • Story • Story Board & color schemes • Character Design & Pose Sheets • Soundtrack - establishes timing • Animatic - timed storyboard • Story Reel - animatic plus soundtrack Visualization Laboratory, Texas A&M University

  5. Cel Animation Process • Rough animation • Exposure sheets • Lead animators - Key Frames • Inbetweeners • Ink and paint cels • Camera work with animation stand Visualization Laboratory, Texas A&M University

  6. 2D Animation • Computer Assisted Animation Systems • Ink and Paint (image based) • pencil drawings, scan, clean, paint • ‘Tweening’ (line based) • interactive drawing, line interpolation • Virtual Animation Stand • infinite layers, exposure sheet driven Visualization Laboratory, Texas A&M University

  7. Virtual Animation Stand • Camera Zoom In, Out • Background Image • pan, scroll • Infinite composited layers • animated element per layer • Exposure sheet driven • all specifics for each frame Visualization Laboratory, Texas A&M University

  8. 3D Animation Systems • What can be “animated?” • most any time varying attribute • Camera Control • Hierarchical models • Kinematics • Dynamics Visualization Laboratory, Texas A&M University

  9. What can be ‘animated?’ • Scene Object Motions • position, articulation, orientation, ... • Visibility - on/off • Surface Color and “Texture” • Light Sources • position, color, directionality, ... • Camera Parameters Visualization Laboratory, Texas A&M University

  10. Camera Control • Select “lens” • field of view, depth of field, … • Position & orientation of camera • Camera motion • linear, splines, ... Visualization Laboratory, Texas A&M University

  11. Stop Motion Animation • Incremental physical object movements • models, armatures, … • Example “Claymation” • Single frame camera shutter • Camera positioning • Physical lighting • “Rocking” between frames • use of video capture cards Visualization Laboratory, Texas A&M University

  12. Kinematics • Key Pose • Joint Angles Interpolation • linear, ease-in/out, splines • Forward Kinematics • angles for all joints at each key frame • Inverse Kinematics • manipulate “end effectors” • solve for the others (may use constraints) Visualization Laboratory, Texas A&M University

  13. Dynamics • Simulate Physical Behavior • Include “Mass” • Include “Forces” • gravity, friction, ... • Animate by Controlling “Forces” • Constraints (varying forces) • Collisions Visualization Laboratory, Texas A&M University

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