← ArchivePaper2022
Gravity Preloading for Maintaining Hair Shape Using the Simulator as a Closed-Box Function
Optimization algorithm that preloads hair rest shapes to compensate for gravitational sag, preserving the groomed design shape during simulation.
Abstract
In animation, hair styles can often be modeled without the consideration of physics. One of the side effects of this workflow is that external forces such as gravity will deform the groom from the designed shape when simulated. We present a simple optimization algorithm that preloads the rest shape to compensate for the external forces to maintain the groom shape during simulation. The algorithm provides artistic control over how much force is compensated for at each vertex.
How to read this
- Category
- Method: a hair rest-shape preloading algorithm
- Contributions
- An optimization that preloads the hair rest shape so simulated gravity does not deform the groomed design
- Per-vertex artistic control over how much external force is compensated
- Context
- Sits in the production hair-simulation lineage (related to The Art and Technology of Hair Simulation in Disney's Moana), addressing the shape-preservation problem where physics pulls a groom away from its artist-designed shape.Builds on: The Art and Technology of Hair Simulation in Disney's Moana
- Correctness
- Framed around treating the simulator as a closed-box function, so it should transfer across solvers, but the abstract reports no numbers; a reader should keep in mind it targets gravitational sag specifically and that compensation is a tuned, artist-controlled choice rather than a guaranteed physical inverse.
- Clarity
- Accessible and short; a first pass conveys the preloading idea, a second pass is needed for the optimization formulation.
- How to read it
- Read the problem framing and the closed-box optimization setup first; do a second pass only if you need the per-vertex compensation math to reimplement it.
Built upon by
Nothing yet.
Related work
- Rest Shape Optimization for Sag-Free Discrete Elastic Rods 2025 / CGF
- Anisotropic Elastoplasticity for Cloth, Knit and Hair Frictional Contact 2017 / TOG
- Scriptable Character FX Solution 2019 / DigiPro
- Hair Emoting with Style Guides in Turning Red 2022 / SIGGRAPH
Keywords
This page summarises the entry and links to its original source. The archive never hosts or redistributes the publication itself.Show it in the full archive list →