Minkowski sum boundary surfaces of 3D-objects

  • Authors:
  • Martin Peternell;Tibor Steiner

  • Affiliations:
  • Institute of Discrete Mathematics and Geometry, University of Technology Vienna, Wiedner Hauptstraíe 8-10, 1040 Wien, Austria;Institute of Discrete Mathematics and Geometry, University of Technology Vienna, Wiedner Hauptstraíe 8-10, 1040 Wien, Austria

  • Venue:
  • Graphical Models
  • Year:
  • 2007

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Abstract

Given two objects A and B with piecewise smooth boundary we discuss the computation of the boundary @C of the Minkowski sum A+B. This boundary surface @C is part of the envelope when B is moved by translations defined by vectors a@?A, or vice versa. We present an efficient algorithm working for dense point clouds or for triangular meshes. Besides this the global self-intersections of the boundary @C are detected and resolved. Additionally we point to some relations between Minkowski sums and kinematics, and compute local quadratic approximations of the envelope.