Incremental collision-free feathering for animated surfaces

摘要

We present a system for efficiently dressing animated 3D models with feathers. While there have been several works on generating static feathers, few methods can incrementally adjust the feathers when the model is animated. Our system makes several important improvements to achieve the goal. We first propose a simple yet effective algorithm to sample the roots based on the orientation field, as the distribution of feather roots has a great impact on the final look. To enable reordering the roots during animation, we analyze and improve the definition of the growth priority. Finally, we propose a method to incrementally adjust minimal feathers to collision-free for each frame of animation. Our system is easy to implement, and the results show that it is efficient and robust.