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Efficient Simulation of Example-Based Materials
Christian Schumacher, Bernhard Thomaszewski, Stelian Coros, Sebastian Martin, Robert W. Sumner, Markus H. Gross
Example-based material simulation system enabling artists to specify target deformation examples that guide realistic elastic behavior.
Abstract
We present a method for efficiently simulating art-directable example-based deformable materials, where an artist supplies a set of example poses that define a subspace of desirable deformations via linear interpolation. The central idea is to represent both input examples and interpolated poses using an incompatible representation of disconnected elements, expressed in a rotation-free reference frame, which lets us interpolate elements individually and bypass the costly geometry reconstruction required by prior example-based elastic materials. We extend the approach to thin shells using edge lengths and dihedral angles, and introduce a formulation of example-based plasticity for both solids and shells. We further explore control mechanisms such as explicit weight control and velocity-dependent activation of example poses.
How to read this
- Category
- Method: example-based (art-directable) deformable-material simulation
- Contributions
- Represents input examples and interpolated poses with disconnected elements in a rotation-free frame, avoiding costly geometry reconstruction
- Extends the approach to thin shells via edge lengths and dihedral angles, plus an example-based plasticity formulation for solids and shells
- Adds control mechanisms such as explicit weight control and velocity-dependent activation of example poses
- Context
- Builds on example-based elastic material methods, recasting the representation to make interpolation cheaper; relates generally to art-directed deformation and elastic-energy simulation.
- Correctness
- The efficiency gain hinges on the incompatible disconnected-element representation that bypasses reconstruction, and behavior is defined by a subspace of artist examples via linear interpolation, so plausibility outside the supplied example span is not guaranteed and remains an art-direction choice.
- Clarity
- Conceptually clear with a strong central idea; a first pass conveys the disconnected-element trick, a second pass is needed for the shell and plasticity formulations.
- How to read it
- First pass for the representation idea and why it avoids reconstruction; second pass on the shell extension and plasticity if you work on directable elastic materials.
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- Multi-Resolution Isotropic Strain Limiting 2010 / SIGGRAPH Asia
Keywords
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