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ACM Transactions on Graphics (TOG), Volume 27 Issue 4, October 2008

Parallel algorithms for approximation of distance maps on parametric surfaces
Ofir Weber, Yohai S. Devir, Alexander M. Bronstein, Michael M. Bronstein, Ron Kimmel
Article No.: 104
DOI: 10.1145/1409625.1409626

We present an efficient O(n) numerical algorithm for first-order approximation of geodesic distances on geometry images, where n is the number of points on the surface. The structure of our algorithm allows efficient implementation...

Geometric skinning with approximate dual quaternion blending
Ladislav Kavan, Steven Collins, Jiří Žára, Carol O'Sullivan
Article No.: 105
DOI: 10.1145/1409625.1409627

Skinning of skeletally deformable models is extensively used for real-time animation of characters, creatures and similar objects. The standard solution, linear blend skinning, has some serious drawbacks that require artist intervention....

Logarithmic perspective shadow maps
D. Brandon Lloyd, Naga K. Govindaraju, Cory Quammen, Steven E. Molnar, Dinesh Manocha
Article No.: 106
DOI: 10.1145/1409625.1409628

We present a novel shadow map parameterization to reduce perspective aliasing artifacts for both point and directional light sources. We derive the aliasing error equations for both types of light sources in general position. Using these equations...

A survey of spatial deformation from a user-centered perspective
James Gain, Dominique Bechmann
Article No.: 107
DOI: 10.1145/1409625.1409629

The spatial deformation methods are a family of modeling and animation techniques for indirectly reshaping an object by warping the surrounding space, with results that are similar to molding a highly malleable substance. They have the virtue of...