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An Optimal Algorithm for Minimum-Link Rectilinear Paths in Triangulated Rectilinear Domains
SUNY Stony Brook, NY 11794 USA.
Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
Google, Switzerland.
Utah State University, UT 84322 USA.
2015 (English)In: Automata, Languages, and Programming, Pt I, SPRINGER-VERLAG BERLIN , 2015, Vol. 9134, 947-959 p.Conference paper (Refereed)
Abstract [en]

We present a new algorithm for finding minimum-link rectilinear paths among h rectilinear obstacles with a total of n vertices in the plane. After the plane is triangulated, for any point s, our algorithm builds an O(n)-size data structure in O(n+h log h) time, such that given any query point t, we can compute a minimum-link rectilinear path from s to t in O(log n + k) time, where k is the number of edges of the path, and the query time is O(log n) if we only want to know the value k. The previously best algorithm solves the problem in O(n log n) time.

Place, publisher, year, edition, pages
SPRINGER-VERLAG BERLIN , 2015. Vol. 9134, 947-959 p.
Lecture Notes in Computer Science, ISSN 0302-9743 (print), 1611-3349 (online) ; 9134
National Category
Civil Engineering
URN: urn:nbn:se:liu:diva-123168DOI: 10.1007/978-3-662-47672-7_77ISI: 000364317700077ISBN: 978-3-662-47672-7; 978-3-662-47671-0OAI: diva2:877269
42nd International Colloquium on Automata, Languages and Programming (ICALP)
Available from: 2015-12-06 Created: 2015-12-04 Last updated: 2015-12-06

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Polishchuk, Valentin
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Communications and Transport SystemsFaculty of Science & Engineering
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