Issue No. 04 - July/August (2002 vol. 22)
Daniel Nixon , Quest Computing
Richard Lobb , University of Auckland
<p>Soft objects are those everyday objects that deform significantly in response to their normal environment. Examples include cushions, plasticine and balloons filled with treacle. We present a new physically based model for animating soft objects. The model consists of two components: an elastic surface and a compressible fluid. The surface is represented as a mass spring system. The fluid is modelled using finite difference approximations to the Navier-Stokes equations of fluid flow. Unlike models that use implicit surfaces, surface tension is a natural feature of the model. Furthermore, the model avoids the problem of volume variation that is inherent in implicit surface animation. We illustrate the behavior of the soft object in environments with gravity and collisions with planes.</p>
Soft Object, modeling, animation, fluid model.
D. Nixon and R. Lobb, "A Fluid-Based Soft-Object Model," in IEEE Computer Graphics and Applications, vol. 22, no. , pp. 68-75, 2002.