Computer animation Hair

1. Computer animation Hair • “A Survey on Hair Modeling: Styling, Simulation, and Rendering,” K. Ward, F. Bertails, T.-Y. Kim S. Marschner, M.-P. Cani, M. Lin

2. Shape – handle various hair styles Motion – dynamic grouping and splitting of hair clusters, collision of hairs, seconday motion due to head motion User Control – over hair style, properties Properites – coarse v. fine, dry v. wet, stiff v. loose, oily v. clean, hair strand types

3. Shape – handle various hair styles Distribute strands Create hair styles

4. Distribute strands

5. Conform strands to head

6. Work with clusters of hair strands

7. Multi-resolution techniques

8. Use fluid flow to define hair strand ‘paths’

9. Constraints for complex hair styles Vector field

10. From photographs Capture local orientations

11. Comparison of shaping techniques

12. Procedurally generate style Pseudo-random Semi-automatic

13. Physically based method Energy minimization Hair dynamics

14. Allow common hair solon operations Wetting, Blow-drying, etc.

15. Hair simulation Mechanics: curl, elasticity, cross section

16. Hair strand chain of rigid links v. spring-dampers

18. Comparison of simulation techniques

19. Particle physics Fluid dynamics

20. Use guide strands for animation Then interpolate for dense hair model

21. Hair strips to represent hair clusters

23. Level of detail representation for animation

24. Adaptive clusters, merge and split

25. Hair rendering