mirror of https://github.com/CGAL/cgal
108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
// Copyright (c) 2002 Utrecht University (The Netherlands).
|
|
// All rights reserved.
|
|
//
|
|
// This file is part of CGAL (www.cgal.org); you may redistribute it under
|
|
// the terms of the Q Public License version 1.0.
|
|
// See the file LICENSE.QPL distributed with CGAL.
|
|
//
|
|
// Licensees holding a valid commercial license may use this file in
|
|
// accordance with the commercial license agreement provided with the software.
|
|
//
|
|
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
|
|
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
//
|
|
// $Source$
|
|
// $Revision$ $Date$
|
|
// $Name$
|
|
//
|
|
// Authors : Hans Tangelder (<hanst@cs.uu.nl>)
|
|
|
|
|
|
|
|
#ifndef CGAL_EUCLIDEAN_DISTANCE_H
|
|
#define CGAL_EUCLIDEAN_DISTANCE_H
|
|
#include <CGAL/Kd_tree_rectangle.h>
|
|
|
|
namespace CGAL {
|
|
|
|
template <class Point>
|
|
class Euclidean_distance {
|
|
|
|
public:
|
|
|
|
typedef typename Kernel_traits<Point>::Kernel::FT NT;
|
|
|
|
private:
|
|
|
|
unsigned int the_dimension;
|
|
|
|
public:
|
|
|
|
// default constructor
|
|
Euclidean_distance() {
|
|
Point p;
|
|
the_dimension=p.dimension();
|
|
assert(the_dimension>0);
|
|
}
|
|
|
|
|
|
|
|
Euclidean_distance(const int d) : the_dimension(d) {}
|
|
|
|
~Euclidean_distance() {}
|
|
|
|
inline NT distance(const Point& q, const Point& p) const {
|
|
NT distance = NT(0);
|
|
for (unsigned int i = 0; i < the_dimension; ++i)
|
|
distance += (q[i]-p[i])*(q[i]-p[i]);
|
|
return distance;
|
|
}
|
|
|
|
|
|
inline NT min_distance_to_queryitem(const Point& q,
|
|
const Kd_tree_rectangle<NT>& r) const {
|
|
NT distance = NT(0);
|
|
for (unsigned int i = 0; i < the_dimension; ++i) {
|
|
if (q[i] < r.min_coord(i))
|
|
distance +=
|
|
(r.min_coord(i)-q[i])*(r.min_coord(i)-q[i]);
|
|
if (q[i] > r.max_coord(i))
|
|
distance +=
|
|
(q[i]-r.max_coord(i))*(q[i]-r.max_coord(i));
|
|
|
|
};
|
|
return distance;
|
|
}
|
|
|
|
inline NT max_distance_to_queryitem(const Point& q,
|
|
const Kd_tree_rectangle<NT>& r) const {
|
|
NT distance=NT(0);
|
|
for (unsigned int i = 0; i < the_dimension; ++i) {
|
|
if (q[i] <= (r.min_coord(i)+r.max_coord(i))/NT(2.0))
|
|
distance += (r.max_coord(i)-q[i])*(r.max_coord(i)-q[i]);
|
|
else
|
|
distance += (q[i]-r.min_coord(i))*(q[i]-r.min_coord(i));
|
|
};
|
|
return distance;
|
|
}
|
|
|
|
inline NT new_distance(NT dist, NT old_off, NT new_off,
|
|
int cutting_dimension) const {
|
|
|
|
NT new_dist = dist + new_off*new_off - old_off*old_off;
|
|
return new_dist;
|
|
}
|
|
|
|
inline NT transformed_distance(NT d) const {
|
|
return d*d;
|
|
}
|
|
|
|
inline NT inverse_of_transformed_distance(NT d) const {
|
|
return CGAL::sqrt(d);
|
|
}
|
|
|
|
}; // class Euclidean_distance
|
|
|
|
} // namespace CGAL
|
|
#endif // EUCLIDEAN_DISTANCE_H
|