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res:
bibo_abstract:
- Sweeping a collection of figures in the Euclidean plane with a straight line is
one of the novel algorithmic paradigms that have emerged in the field of computational
geometry. In this paper we demonstrate the advantages of sweeping with a topological
line that is not necessarily straight. We show how an arrangement of n lines in
the plane can be swept over in O(n2) time and O(n) space by a such a line. In
the process each element, i.e., vertex, edge, or region, is visited once in a
consistent ordering. Our technique makes use of novel data structures which exhibit
interesting amortized complexity behavior; the result is an algorithm that improves
upon all its predecessors either in the space or the time bounds, as well as being
eminently practical. Numerous applications of the technique to problems in computational
geometry are givenâ€”many through the use of duality transforms. Examples include
solving visibility problems, detecting degeneracies in configurations, computing
the extremal shadows of convex polytopes, and others. Even though our basic technique
solves a planar problem, its applications include several problems in higher dimensions.@eng
bibo_authorlist:
- foaf_Person:
foaf_givenName: Herbert
foaf_name: Herbert Edelsbrunner
foaf_surname: Edelsbrunner
foaf_workInfoHomepage: http://www.librecat.org/personId=3FB178DA-F248-11E8-B48F-1D18A9856A87
orcid: 0000-0002-9823-6833
- foaf_Person:
foaf_givenName: Leonidas
foaf_name: Guibas, Leonidas J
foaf_surname: Guibas
bibo_doi: 10.1016/0022-0000(89)90038-X
bibo_issue: '1'
bibo_volume: 38
dct_date: 1989^xs_gYear
dct_publisher: Elsevier@
dct_title: Topologically sweeping an arrangement@
...