Simulating Cartoon Style Animation Stephen Chenney, Mark Pingel, Rob Iverson, Marcin Szymanski

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Simulating Cartoon Style AnimationStephen
Chenney, Mark Pingel, Rob Iverson, Marcin
Szymanski

• Presented by Andrea Tartaro

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Squash and Stretch
Traditional animation example
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Luxo, Jr. Squash and Stretch
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Lasseters Principles of Animation

• Squash and Stretch
• Timing
• Anticipation
• Staging
• Follow through and overlapping action
• Straight ahead action and pose-to-pose action
• Slow in and out
• Arcs
• Exaggeration
• Secondary Action
• Appeal
• Personality

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The System
Stylistic deformation
Ballistic motion simulator
Collision detection mechanism
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Cartoon Simulation

• Gravity
• Restitution (lost energy)
• Max Stretch
• Min Squash
• Stretch Rate
• Squash Rate

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Cartoon Physics Algorithm

• Two modes
• Free-space
• Collision
• Update free space objects
• Compute collision interpolation parameters
• Update all objects involved in collisions

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Special Cases

• Coming to reset
• Simultaneous collisions

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Limitations

• Only convex polygonal models
• Only one moving object
• Collision must be between one deformable object
  and a fixed object

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Applications

• Interactive Entertainment/ Games
• Animation interfaces for novices
• Aids to traditional animation
• Storyboarding animation?

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