Computer Animation Rick Parent Computer Animation Algorithms and Techniques Figure Animation.

Computer AnimationRick Parent

Computer AnimationAlgorithms and Techniques

Figure Animation

Vitrual Human Representation

Body ModelingGeometric representationlevel of detail DoFsaccessories: hair, clothesrigid v. flexible

Activitiesupper body tasks: reaching, graspinglocomotion: walking, runningbody language: stance, gestures

Secondary motionupper body tasks: reaching, graspinglocomotion: walking, runningbody language: stance, gestures

Body Modeling - Geometry

Polygonal representations

Subdivision surfaces

Implicit surfaces

Body scan

http://www.cyberware.com/

Animation– Rigid Links

Use FK or IK to animate

Hierarchical animation

Interpolate between key frames

Animation – Skeleton Driven

http://www.emeraldinsight.com/journals.htm?articleid=1532798&show=html

Animation – Skeleton Driven

Animation– Layered Approach

Reaching

Modeling the armThe shoulder jointThe handCoordinated movementObstaclesStrength

Modeling the Arm

Also used is 3-2-2 DoF

Modeling the Arm

Determine plane of motion (3 DoF)then 1-1 DoF armThen 2/3 DoF wrist

Modeling the Shoulder

Reaching

Approximating Human Reaching Volumes Using Inverse KinematicsI. Rodrígueza, M. Peinadoa, R. Boulicb, D. Meziatainma@aut.uah.es, manupg@aut.uah.es, ronan.boulic@epfl.ch, meziat@

Modeling the Hand

Grasping

Grasp planning for digital humansFaisal Amer Goussous, U. of Iowa

Reaching – close v. distantExtended grasping behavior for Autonomous Human AgentsR. Max, R. Boulic, D. Thalmann

Mechanics of locomotion

walk cycle v. run cycle

Pelvic transportPelvic rotationPelvic TiltKnee flexionAnkle and toe joints

Anatomy of the Walk

Anatomy of the Run

Pelvic transport

Pelvic rotation over foot

Pelvic rotation around hips

Motion of pelvic

Pelvic tilt

Knee bend to allow tilt

Ankle and Toe bend

Walk Data

Using Dynamics in the Walk

facial animation

Expressions v. speech

facial animationParameterized facial attributues

Blend shapes

Muscle modelssurface musclesdeep muscles

Performance (or data) driveninstrumented (mocap system)video

http://www.youtube.com/watch?v=uQJ7gwG0G5g

Parameterized Facial features

Facial blend shapes

Facial muscle model

Surface muscle model

Geometry-based Muscle Modeling for Facial AnimationKolja K¨ahler J¨org Haber Hans-Peter Seidel

“computer animation” facial

http://www.youtube.com/watch?v=uQJ7gwG0G5g

“computer animation” facial

coarticulation

Text to speech

Audio to speech

prosody

Phonemes to mouth shapes (visemes)

Break down to phonemes

http://www.youtube.com/watch?v=fxADT-kZNrA

Dressing the Figure

Cloth and clothingSimple drapingClothesModeling dynamicsCollision detection and response

Dressing the Figure

Angular springs

Dressing the Figure

Complexity100,000 strands

Collisions

Shadowing

ReflectionsDesign hairstyle

Animate hair

Populate head with hair

Hair types

http://run.usc.edu/cs599-s10/hair/c33-hair-sig07.pdf

Hair – Hierarchy

A Survey on Hair Modeling: Styling, Simulation, and RenderingKelly Ward, Florence Bertails, Tae-Yong Kim, Stephen R. Marschner, Marie-Paule Cani, and Ming C. Lin,

Computer Animation Rick Parent Computer Animation Algorithms and Techniques Figure Animation.

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