Last modified
February 29, 2000

  Seminar Abstract
Center for Data Intensive Computing



Physics-Based Modeling For Visual Computing Applications

Recently, Physics-based modeling and design has emerged as a new inter-disciplinary paradigm that marries geometric modeling with applied Mathematics, computational Physics, and Finite Element Method. Physics-based modeling techniques integrate geometric attributes, material properties, and dynamic behaviors for a large variety of geometric shapes. In particular, physics-based modeling evolves the shape geometry and its underlying parameters via intuitive force-based manipulation and constraint enforcement according to the principles of Lagrangian mechanics. In this talk, the speaker will motivate the physics-based modeling methodology, present the latest research advances of several projects conducted by his group, and demonstrate their various visual computing applications in geometric modeling, engineering design, finite element analysis, interactive graphics, scientific visualization, human-computer interface, imaging technologies for medicine, and virtual environments. First, the speaker will present a novel haptic approach for direct manipulation of physics-based spline objects. The new method permits designers to interactively sculpt virtual material with a standard haptic device, and feel the physically realistic presence of spline objects with force feedback throughout the design process. A video demonstration will illustrate various haptic sculpting tools that support point, normal, and curvature operations. Second, the speaker will discuss a new subdivision-based finite element method. Subdivision has been extensively used to model smooth shapes of arbitrary topology in the limit. The speaker and his research team has integrated physics-based modeling techniques with geometric subdivision methodology and proposed an unified approach for arbitrary subdivision schemes. This dynamic framework permits users to directly manipulate the limit surface via "force" tools. Third, the speaker will outline other on-going research efforts of his group if time permits. It is our hope that this integrated approach can be valuable to the BNL-CDIC mission and its on-going projects.

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