Distance computation for canal surfaces using cone-sphere bounding volumes

  • Authors:
  • Yanpeng Ma;Changhe Tu;Wenping Wang

  • Affiliations:
  • School of Computer Science and Technology, Shandong University, Jinan, China;School of Computer Science and Technology, Shandong University, Jinan, China;University of Hong Kong, Hong Kong, China

  • Venue:
  • Computer Aided Geometric Design
  • Year:
  • 2012

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Abstract

A canal surface is the envelope of a one-parameter set of moving spheres. We present an accurate and efficient method for computing the distance between two canal surfaces using a set of cone-spheres as bounding volumes. For two canal surfaces, we use the distances between their bounding cone-spheres to approximate their distance; the accuracy of this approximation is improved progressively by subdividing the canal surfaces into more segments and using more cone-spheres to bound the segments, until a pre-specified threshold is reached. Experimental comparisons show that our method is more efficient than Lee et al.@?s method (Lee et al., 2007).