DocumentCode :
3168650
Title :
Fast collision detection among multiple moving spheres
Author :
Kim, Dong-Jin ; Guibas, Leonidas J. ; Shin, Sung-Yong
Author_Institution :
Dept. of Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fYear :
1997
fDate :
5-6 Jun 1997
Firstpage :
1
Lastpage :
7
Abstract :
The paper presents an event driven approach that efficiently detects collisions among multiple moving spheres of uniform radius. We divide the space containing the spheres into uniform subspaces of cell structure. Each sphere intersecting a subspace is tested against the others intersecting the same subspace for possible collisions. We identify three types of events to detect the sequence of all collisions during our simulation: collision, entering, and leaving. The first type of events is due to actual collisions, and the other two types occur when spheres move from subspace to subspace. By tracing all such events in the order of their occurring times, we are able to simulate n moving spheres with proper collision response in O(nc log n+ne log n) time with O(n) space after O(n log n) time preprocessing, where nc and ne are the number of actual collisions and that of entering and leaving events during the simulation, respectively. Since ne depends on the size of subspaces, we adopt the collision model from kinetic theory for molecular gas (Feynmann et al., 1963) to determine the subspace size that minimizes simulation time. Experimental results show that collision detection can be done in linear time in n over a large range
Keywords :
computational geometry; computer animation; digital simulation; position control; actual collisions; cell structure; collision model; collision response; event driven approach; fast collision detection; kinetic theory; linear time; molecular gas; multiple moving spheres; preprocessing time; simulation; subspace size; uniform radius; uniform subspaces; Computational modeling; Computer science; Computer simulation; Discrete event simulation; Event detection; Kinetic theory; Object detection; Solid modeling; Space technology; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Animation '97
Conference_Location :
Geneva
ISSN :
1087-4844
Print_ISBN :
0-8186-7984-0
Type :
conf
DOI :
10.1109/CA.1997.601033
Filename :
601033
Link To Document :
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