A Hybrid Physics-Based Subdivision Technique Using Coupled Dynamic and Subdivision Parameters

Sumantro Ray, Hong Qin

Abstract: The last few decades have seen enormous progress in both geometric subdivision, and physics-based simulation techniques. Mesh-based dynamic systems often require both subdivision and physical simulation for realistic and accurate results. However, the simulation parameters have been independent of the subdivision parameters, and vice-versa. This paper attempts to bridge this gap. We propose a hybrid approach that combines the physics-based simulation techniques and geometric subdivision algorithms, and demonstrate a mass-spring based system with physics-based butterfly subdivision. The initial subdivision coefficients are extracted using the physical properties of the base (L/sub 0/) mesh. Latter subdivision steps generate both the geometric and physical properties of the subdivided (L/sub k/) mesh. This approach conserves mass, center of gravity, linear momentum and external force, and minimizes the distance between the L/sub k/ and L/sub k+1/ meshes, at any time step. Our approach is general, efficient, and serve as a foundation for many applications in many fields.