Summary
In this chapter, we address the problem of robust point-location in a generalized d-dimensional Voronoi diagram. The exact point location requires the solution for expressions of degree four. A natural question is what can be done using expression of smaller degree. We apply polyhedral metrics for this task. In general dimensions two Minkowski metrics can be used: L 1 (Manhattan metric) and L ∞ (supremum metric). The approximation factor is \(\sqrt d\) and the computation uses expressions of degree one.
We also show that a polygonal metric can be applied in two dimensions. The computation involves only \(O(\lg k)\) calls of the algorithm ESSA for detecting the sign of a sum using floating-point arithmetic.
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Bereg, S., Gavrilova, M.L., Zhang, Y. (2009). Robust Point-Location in Generalized Voronoi Diagrams. In: Gavrilova, M.L. (eds) Generalized Voronoi Diagram: A Geometry-Based Approach to Computational Intelligence. Studies in Computational Intelligence, vol 158. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85126-4_13
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DOI: https://doi.org/10.1007/978-3-540-85126-4_13
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