Title
Variational sphere set approximation for solid objects
Abstract
We approximate a solid object represented as a triangle mesh by a bounding set of spheres having minimal summed volume outside the object. We show how outside volume for a single sphere can be computed using a simple integration over the object’s triangles. We then minimize the total outside volume over all spheres in the set using a variant of iterative Lloyd clustering that splits the mesh points into sets and bounds each with an outside volume-minimizing sphere. The resulting sphere sets are tighter than those of previous methods. In experiments comparing against a state-of-the-art alternative (adaptive medial axis), our method often requires half as many spheres, or fewer, to obtain the same error, under a variety of error metrics including total outside volume, shadowing fidelity, and proximity measurement.
Year
DOI
Venue
2006
10.1007/s00371-006-0052-0
The Visual Computer
Keywords
Field
DocType
Variational approximation,Solid objects,Shadow,Collision detection
Shadow,Mathematical optimization,Collision detection,Medial axis,Bounding sphere,SPHERES,Cluster analysis,Mathematics,Triangle mesh,Bounding overwatch
Journal
Volume
Issue
ISSN
22
9
0178-2789
Citations 
PageRank 
References 
26
1.31
18
Authors
7
Name
Order
Citations
PageRank
Rui Wang148933.21
Kun Zhou23690159.79
John Snyder32579172.17
Xin-Guo Liu442527.49
Hujun Bao52801174.65
Qunsheng Peng61193101.63
Baining Guo73970194.91