mirror of https://github.com/CGAL/cgal
144 lines
3.5 KiB
C++
144 lines
3.5 KiB
C++
// Copyright (c) 2020 GeometryFactory (France).
|
|
// All rights reserved.
|
|
//
|
|
// This file is part of CGAL (www.cgal.org).
|
|
//
|
|
// $URL$
|
|
// $Id$
|
|
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
|
|
//
|
|
// Author(s) : Simon Giraudot
|
|
|
|
#ifndef CGAL_ORTHTREE_TRAITS_2_H
|
|
#define CGAL_ORTHTREE_TRAITS_2_H
|
|
|
|
#include <CGAL/license/Orthtree.h>
|
|
|
|
#include <CGAL/Dimension.h>
|
|
#include <CGAL/Bbox_2.h>
|
|
|
|
namespace CGAL
|
|
{
|
|
|
|
/*!
|
|
\ingroup PkgOrthtreeTraits
|
|
|
|
The class `Orthtree_traits_2` can be used as a template parameter of
|
|
the `Orthtree` class.
|
|
|
|
\tparam GeomTraits model of `Kernel`.
|
|
|
|
\cgalModels{OrthtreeTraits}
|
|
\sa `CGAL::Quadtree`
|
|
\sa `CGAL::Orthtree_traits_3`
|
|
\sa `CGAL::Orthtree_traits_d`
|
|
*/
|
|
template <typename GeomTraits>
|
|
struct Orthtree_traits_2
|
|
{
|
|
public:
|
|
|
|
/// \name Types
|
|
/// @{
|
|
|
|
typedef Dimension_tag<2> Dimension; ///< Dimension type.
|
|
typedef Bbox_2 Bbox_d; ///< Bounding box type.
|
|
typedef typename GeomTraits::FT FT; ///< Number type.
|
|
typedef typename GeomTraits::Point_2 Point_d; ///< Point type.
|
|
typedef typename GeomTraits::Circle_2 Sphere_d; ///< Sphere type.
|
|
typedef typename GeomTraits::Cartesian_const_iterator_2 Cartesian_const_iterator_d; ///< An iterator over the %Cartesian coordinates.
|
|
typedef std::array<FT, Dimension::value> Array; ///< Array type.
|
|
|
|
/*!
|
|
* \brief Two directions along each axis in Cartesian space, relative to a node.
|
|
*
|
|
* Directions are mapped to numbers as 2-bit integers.
|
|
*
|
|
* The first bit indicates the axis (0 = x, 1 = y),
|
|
* the second bit indicates the direction along that axis (0 = -, 1 = +).
|
|
*
|
|
* The following diagram may be a useful reference:
|
|
*
|
|
* 3 *
|
|
* |
|
|
* | y+
|
|
* | *
|
|
* 0 *------+------* 1 |
|
|
* | |
|
|
* | +-----* x+
|
|
* |
|
|
* * 2
|
|
*
|
|
* This lookup table may also be helpful:
|
|
*
|
|
* | Direction | bitset | number | Enum |
|
|
* | --------- | ------ | ------ | ----- |
|
|
* | `-x` | 00 | 0 | LEFT |
|
|
* | `+x` | 01 | 1 | RIGHT |
|
|
* | `-y` | 10 | 2 | DOWN |
|
|
* | `+y` | 11 | 3 | UP |
|
|
*/
|
|
enum Adjacency
|
|
{
|
|
LEFT,
|
|
RIGHT,
|
|
DOWN,
|
|
UP
|
|
};
|
|
|
|
#ifdef DOXYGEN_RUNNING
|
|
/*!
|
|
Functor with an operator to construct a `Point_d` from an `Array` object.
|
|
*/
|
|
typedef unspecified_type Construct_point_d_from_array;
|
|
#else
|
|
struct Construct_point_d_from_array
|
|
{
|
|
Point_d operator() (const Array& array) const
|
|
{
|
|
return Point_d (array[0], array[1]);
|
|
}
|
|
};
|
|
#endif
|
|
|
|
|
|
#ifdef DOXYGEN_RUNNING
|
|
/*!
|
|
Functor with an operator to construct a `Bbox_d` from two `Array` objects (coordinates of minimum and maximum points).
|
|
*/
|
|
typedef unspecified_type Construct_bbox_d;
|
|
#else
|
|
struct Construct_bbox_d
|
|
{
|
|
Bbox_d operator() (const Array& min,
|
|
const Array& max) const
|
|
{
|
|
return Bbox_d (min[0], min[1], max[0], max[1]);
|
|
}
|
|
};
|
|
#endif
|
|
|
|
/// @}
|
|
|
|
/// \name Operations
|
|
/// @{
|
|
|
|
/*!
|
|
Function used to construct an object of type `Construct_point_d_from_array`.
|
|
*/
|
|
Construct_point_d_from_array construct_point_d_from_array_object() const
|
|
{ return Construct_point_d_from_array(); }
|
|
|
|
/*!
|
|
Function used to construct an object of type `Construct_bbox_d`.
|
|
*/
|
|
Construct_bbox_d construct_bbox_d_object() const
|
|
{ return Construct_bbox_d(); }
|
|
|
|
/// @}
|
|
};
|
|
|
|
}
|
|
|
|
#endif // CGAL_ORTHTREE_TRAITS_2_H
|