31-Issue 5

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https://diglib.eg.org/handle/10.2312/174

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Browsing 31-Issue 5 by Subject "Computational geometry and object modeling"

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    Time-Discrete Geodesics in the Space of Shells
    (The Eurographics Association and Blackwell Publishing Ltd., 2012) Heeren, Behrend; Rumpf, Martin; Wardetzky, Max; Wirth, Benedikt; Eitan Grinspun and Niloy Mitra
    Building on concepts from continuum mechanics, we offer a computational model for geodesics in the space of thin shells, with a metric that reflects viscous dissipation required to physically deform a thin shell. Different from previous work, we incorporate bending contributions into our deformation energy on top of membrane distortion terms in order to obtain a physically sound notion of distance between shells, which does not require additional smoothing. Our bending energy formulation depends on the so-called relative Weingarten map, for which we provide a discrete analogue based on principles of discrete differential geometry. Our computational results emphasize the strong impact of physical parameters on the evolution of a shell shape along a geodesic path.