Titre : Tools for Liquid Control in Computer Graphics
Jury : Pierre Poulin, Liam Paull, Bernhard Thomaszewski.
Lieu : AA 3195
Date : Vendredi le 31 Août à 10h00
Physics-based animation can lead to systems with very complex and realistic behavior,
for example scenes involving pieces of cloth, fires, ropes, liquids, etc. However, providing
user control over physics-based animations is a daunting task. Among physical
models, fluid simulation brings up particularly difficult problems to the control process
because of the complexity and non linearity of the Navier-Stokes equations. Although
many methods and tools have been developed to convincingly simulate fluids, too few
methods provide efficient and intuitive ways to give a targeted behavior to a fluid. However
and in many cases, being able to control a fluid in order to make it behave according
to an intention is crucial to enhance the artistic process.
This document describes the PhD research we have done so far, whose main axis is
to introduce new artist-friendly ways of controlling liquid simulations. As part of our
first project, we have developed a system enabling animators to control particle-based
liquid simulations using precomputed patches of animation stored in a database. In this
system, liquid located in a control area is subjected to forces modifying its behavior in
order to locally reproduce the template instantiated by the animator. Temporary particles
can efficiently correct the density error between liquid and template regardless
of the surrounding environment. A 2D proof of concept showing some promising interactive
results has been implemented on CPU. Even if our control scheme leads to a
relatively small overhead, interactive frame rate can be maintained only for coarse or
small-scale simulations. Indeed and for high resolutions, the simulation itself becomes
too expensive. After extending the method to 3D liquids and as part of a second project,
we would like to develop a method to efficiently constrain a high-resolution liquid from
a low-resolution one in order to complete our first project. A generic optimization-based
formulation of particle-based liquid control applicable to several use cases will also be
investigated as part of a third project.
In the end, we hope that our contributions to this difficult, yet crucial field will steer
new fundamental and applied research to help animators to create even more astonishing
liquid animated visual effects.
Vous êtes cordialement invité.
Détails de l'événement
Event date: Friday 31 August 2018 10:00 to 00:00
Location: 3195, Pavillon André-Aisenstadt, 2920, Chemin de la Tour, Montréal, Canada
Price: Free $