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Rectilinear link diameter and radius in a rectilinear polygonal domain

par Arseneva, Elena;Chiu, Man Kwun;Korman, Matias ;Markovic, Aleksandar;Okamoto, Yoshio;Ooms, Aurélien ;Van Renssen, André;Roeloffzen, Marcel
Référence Computational geometry, 92, 101685
Publication Publié, 2021-01

Article révisé par les pairs

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Résumé :

We study the computation of the diameter and radius under the rectilinear link distance within a rectilinear polygonal domain of n vertices and h holes. We introduce a graph of oriented distances to encode the distance between pairs of points of the domain. This helps us transform the problem so that we can search through the candidates more efficiently. Our algorithm computes both the diameter and the radius in O(min⁡(nω,n2+nhlog⁡h+χ2)) time, where ω<2.373 denotes the matrix multiplication exponent and χ∈Ω(n)∩O(n2) is the number of edges of the graph of oriented distances. We also provide an alternative algorithm for computing the diameter that runs in O(n2log⁡n) time.