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In addition to the requirements described in the concept DelaunayTriangulationTraits_3, the geometric traits class of a Delaunay triangulation plugged in a basic alpha shape with fixed alpha value provides the following.
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CGAL::Comparison_result or Uncertain<CGAL::Comparison_result>
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An object constructor able to compare the squared radius of the smallest circumscribing sphere of either four, three, two or one point(s) with a given value of alpha. It provides: Comparison_result operator()(Point_3,Point_3,Point_3,Point_3) Comparison_result operator()(Point_3,Point_3,Point_3) Comparison_result operator()(Point_3,Point_3) Comparison_result operator()(Point_3)
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Default constructor.
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