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A compact piecewise-linear Voronoi diagram for convex sites in the plane, or, Simple paths in a complex world

University of British Columbia

In the plane, the post-office problem, which asks for the closest site to a query site, and retraction motion planning, which asks for a one-dimensional retract of the free space of a robot, are both classically solved by computing a Voronoi diagram. When the sites are k disjoint convex sets, we give a compact representation of the Voronoi diagram, using 0(k) line segments, that is sufficient for logarithmic time post-office location queries and motion planning. If these sets are polygons with n total vertices given in standard representations, we compute this diagram optimally in 0(k log n) deterministic time for the Euclidean metric and in 0(k log n log m) deterministic time for the convex distance function defined by a convex m-gon.

Thesis/Dissertation

application/pdf

2008-09-15

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http://hdl.handle.net/2429/2000

Computer Science

University of British Columbia

UBCV

DSpace