Human Figure Animation

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Presentation transcript:

Human Figure Animation CSE 3541 Matt Boggus

Virtual Human Representation Additional geometric modeling topics Face modeling and animation Hair Cloth

Body Modeling - Geometry Polygonal representations

Body Modeling - Geometry

Body Modeling - Geometry Subdivision surfaces ; CSE 5543 – geometric modeling

Split

Animation– Rigid Links Hierarchical animation Use FK or IK to animate Interpolate between key frames

Facial animation Parameterized facial attributues Blend shapes Muscle models surface muscles deep muscles Performance (or data) driven instrumented (mocap system) video capture

Parameterized Facial features Also see http://www.facegen.com/

Interpolate between 3D models Facial blend shapes Interpolate between 3D models Another (older) example http://www.youtube.com/watch?v=8dS0dcULRBA

Facial muscle model

Surface muscle model Geometry-based Muscle Modeling for Facial Animation Kolja K¨ahler J¨org Haber Hans-Peter Seidel

Hair and fur

MODELING, ANIMATION, AND RENDERING Hair Complexity 100,000 strands Collisions Populate head with hair Shadowing Design hairstyle Reflections Animate hair Hair types STRANDS AND HAIR MODELING, ANIMATION, AND RENDERING SIGGRAPH 2007 Course Notes

Hair - mesh

Hair – linkages and springs

Hair – particle tracing/strands Figures from http://en.wikipedia.org/wiki/Particle_system

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

Cloth

“Techniques for Animating Cloth” M. Yalcin, C. Yildiz

Total energy = repel + stretch + shear + bend + gravity

Additional Slides

Smooth Geometry Implicit surfaces – geometry exists where function evaluates to 0 Metaballs example Raycast or Marching Cubes to construct geometry

Fur rendering Real-Time Fur over Arbitrary Surfaces

Fur

Reaching and grasping

Modeling the Arm Also used is 3-2-2 DoF

Modeling the Arm Determine plane of motion (3 DoF) Use a 1-1 DoF arm

Modeling the Hand

Grasping Grasp planning for digital humans Faisal Amer Goussous, U. of Iowa

Locomotion

Anatomy of the Walk

Anatomy of the Run

Ankle and Toe bend