Hermite interpolation by hypocycloids and epicycloids with rational offsets

  • Authors:
  • Zbyněk Šír;Bohumír Bastl;Miroslav Lávička

  • Affiliations:
  • University of West Bohemia, Faculty of Applied Sciences, Department of Mathematics, Univerzitní 8, 301 00 Plzeň, Czech Republic;University of West Bohemia, Faculty of Applied Sciences, Department of Mathematics, Univerzitní 8, 301 00 Plzeň, Czech Republic;University of West Bohemia, Faculty of Applied Sciences, Department of Mathematics, Univerzitní 8, 301 00 Plzeň, Czech Republic

  • Venue:
  • Computer Aided Geometric Design
  • Year:
  • 2010

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Abstract

We show that all rational hypocycloids and epicycloids are curves with Pythagorean normals and thus have rational offsets. Then, exploiting the convolution properties and (implicit) support function representation of these curves, we design an efficient algorithm for G^1 Hermite interpolation with their arcs. We show that for all regular data, there is a unique interpolating hypocycloidal or epicycloidal arc of the given canonical type.