Character Animation Human Movement

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Character AnimationHuman Movement

• Computer Animation SS2008

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Walk Cycle

• Action can be ...
• Computed dynamically
• A cycle of poses (keyframes)?
• Sampled
• Individual poses are not always statically stable

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Walk Cycle
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Walk Cycle
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Walk CyclePelvic Transport

• Pelvis is supported by the stance leg at various
  points during the stance phase

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Walk CyclePelvic Rotation

• Pelvis rotates about vertical axis centered at
  the stance leg
• This helps to lengthen the stride

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Walk CyclePelvic List

• To reduce the amount of lift, the pelvis lists
  (tilts) by rotating in the coronal plane

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Walk CycleKnee Flexion

• Bending the knee joint (flexion) allows the swing
  leg to safely pass over the floor and avoid
  contact

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Walk CycleAnkle Toe Joints

• Ankle bends as foot is placed
• Toe joints bend just before liftoff

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Run Cycle
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Run Cycle
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Run Cycle

• Here's an example of the run cycle animated
• Watch how sometimes both feet are off the ground

http//www.erain.com/img/RunCycle.swf
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Comparison

• Rise and fall of body identical
• Greater body tilt in run cycle
• At least one foot on surface at all times for
  walk cycle, but not for run cycle