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| GI'98 Online Papers |
Active Implicit Surface for Animation
Abstract
This paper introduces a new model of deformable surfaces
designed for animation, which we call active implicit surfaces.
The underlying idea is to animate a potential
field defined by discrete values stored in a grid, rather than directly
animating a surface.
This surface, defined as an iso-potential of the field,
has the ability to follow a given object using
a snake-like strategy. Surface tension and other characteristics such
as constant surface area or constant volume may be added
to this model. The implicit
formulation allows the surface to easily experience
topology changes during simulation.
We present an optimized implementation: computations are
restricted to a close neighborhood around the surface.
Applications range from the coating of
deformable materials simulated by particle systems (the surface hides the
granularity of the underlying model) to the generation of metamorphosis
between shapes that may not have the same topology.
The Paper
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