Narrowing Down Algorithms

Modeling

• Transition between different Levels-of-Detail (LODs) or Wisps

1. Strands (highest) --> Clusters --> Strips (lowest)
2. Use (a modified) Adaptive Wisp Tree (AWT) to facilitate transitions

• Interpolation of sparse guide hairs (points connected by curves) to create density

1. Guide hairs grown based on scalp geometry
2. Guide hairs loaded from a file

Animating

• Particle dynamics (treat control points of guide hairs like particles)

1. Verlet integration
2. Runge-Kutta integration

• Collision detection using a polygonal mesh boundary around the head

Rendering

• Anisotropic reflections

1. Marschner model
2. Look-up textures

• Opacity shadow maps