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CGAL 6.0.1 - 2D and 3D Linear Geometry Kernel
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Kernel::PowerSideOfOrientedPowerSphere_3 Concept Reference

Definition

Operations

A model of this concept must provide:

Oriented_side operator() (const Kernel::Weighted_point_3 &p, const Kernel::Weighted_point_3 &q, const Kernel::Weighted_point_3 &r, const Kernel::Weighted_point_3 &s, const Kernel::Weighted_point_3 &t) const
 Let {z(p,q,r,s)}^{(w)} be the power sphere of the weighted points (p,q,r,s).
 

Member Function Documentation

◆ operator()()

Oriented_side Kernel::PowerSideOfOrientedPowerSphere_3::operator() ( const Kernel::Weighted_point_3 &  p,
const Kernel::Weighted_point_3 &  q,
const Kernel::Weighted_point_3 &  r,
const Kernel::Weighted_point_3 &  s,
const Kernel::Weighted_point_3 &  t 
) const

Let {z(p,q,r,s)}^{(w)} be the power sphere of the weighted points (p,q,r,s).

Returns

  • ON_ORIENTED_BOUNDARY if t is orthogonal to {z(p,q,r,s)}^{(w)},
  • ON_NEGATIVE_SIDE if t lies outside the oriented sphere of center z(p,q,r,s) and radius \sqrt{ w_{z(p,q,r,s)}^2 + w_t^2 } (which is equivalent to \Pi({t}^{(w)},{z(p,q,r,s)}^{(w)}) > 0 ),
  • ON_POSITIVE_SIDE if t lies inside this oriented sphere.

The order of the points p, q, r and s is important, since it determines the orientation of the implicitly constructed power sphere.

Precondition
p, q, r, s are not coplanar.

If all the points have a weight equal to 0, then power_side_of_oriented_power_sphere_3(p,q,r,s,t) = side_of_oriented_sphere(p,q,r,s,t).