We present a hybrid direct and projective iterative algorithm for simulating hair. The algorithm is fast, stable, visually accurate, uses a comprehensive elasticity model with a well defined continuum limit. The low resolution simulation is a good predictor of higher resolution results which we attribute to our novel treatment of bending and twisting forces. Timesteps may be as large a single step for each frame of 24 Hz animation. The treatment of collisions is implicit and does not introduce any artificial strain or forces.

Research Paper for Efficient and Stable Approach to Elasticity an Collisions for Hair Animation