Planar Embeddings of Graphs with Specified Edge Lengths

  • Sergio Cabello
  • Erik D. Demaine
  • Günter Rote
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2912)

Abstract

We consider the problem of finding a planar embedding of a (planar) graph with a prescribed Euclidean length on every edge. There has been substantial previous work on the problem without the planarity restrictions, which has close connections to rigidity theory, and where it is easy to see that the problem is NP-hard. In contrast, we show that the problem is tractable—indeed, solvable in linear time on a real RAM—for planar embeddings of planar 3-connected triangulations, even if the outer face is not a triangle. This result is essentially tight: the problem becomes NP-hard if we consider instead planar embeddings of planar 3-connected infinitesimally rigid graphs, a natural relaxation of triangulations in this context.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Sergio Cabello
    • 1
  • Erik D. Demaine
    • 2
  • Günter Rote
    • 3
  1. 1.Institute of Information and Computing SciencesUniversiteit UtrechtUtrechtThe Netherlands
  2. 2.MIT Laboratory for Computer Science200 Technology SquareCambridgeUSA
  3. 3.Institut für InformatikFreie Universität BerlinBerlinGermany

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