Efficient 2D Simulation on Moving 3D Surfaces
Dieter Morgenroth, Stefan Reinhardt, Bernhard Eberhardt, Daniel Weiskopf
THE 19TH ANNUAL SYMPOSIUM ON COMPUTER ANIMATION
Abstract:
We present a method to simulate fluid flow on evolving surfaces, e.g., an oil film on a water surface. Given an animatedsurface (e.g., extracted from a particle-based fluid simulation) in three-dimensional space, we add a second simulation on thisbase animation. In general, we solve a partial differential equation (PDE) on a level set surface obtained from the animatedinput surface. The properties of the input surface are transferred to a sparse volume data structure that is then used for thesimulation. We introduce one-way coupling strategies from input properties to our simulation and we add conservation of massand momentum to existing methods that solve a PDE in a narrow-band using the Closest Point Method. In this way, we efficiently compute high-resolution 2D simulations on coarse input surfaces. Our approach helps visual effects creators easily integrate aworkflow to simulate material flow on evolving surfaces into their existing production pipeline.
Bibtex:
@article{Morgenroth:2020:MovingSurface,
author = {Dieter Morgenroth and Stefan Reinhardt and Bernhard Eberhardt and Daniel Weiskopf},
title = {Efficient 2D Simulation on Moving 3D Surfaces},
year = {2020},
booktitle = {Computer Graphics Forum},
volume = {39},
number = {8},
pages = {},
}
Acknowledgments:
We want to thank Mariusz Wesierski for his help in setting up theriver simulation and his support in all Houdini questions. This workis partly supported by “Kooperatives Promotionskolleg Digital Media” at Stuttgart Media University and the University of Stuttgart.
Paper:
Source Code:
https://github.com/dimo3d/Cappucino
Supplemental Video:
Presentation Video: