Construction of Virtual Rheological Objects Computable in Realtime

Abstract

We describe virtual rheological objects computable in realtime. Deformable soft objects such as food and tissue show both elastic and plastic properties, which are referred to as rheological objects. Construction of virtual rheological objects has not been, however, established yet. In this article, we construct virtual rheological objects, which are applicable to realtime presentation of deformation and force of rheological objects. First, we formulate three-element model to describe the rheological deformation using a truss model. Second, applying an extended penalty method, we maintain the topology of the truss model and describe the interaction among objects. Next, we demonstrate coherent description of rheological objects, elastic objects, and viscoplastic objects. Finally, we demonstrate the realtime computation of virtual rheological objects.