/usr/include/siscone/spherical/vicinity.h is in libsiscone-spherical-dev 2.0.6-1.
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///////////////////////////////////////////////////////////////////////////////
// File: vicinity.h //
// Description: header file for particle vicinity (Cvicinity class) //
// This file is part of the SISCone project. //
// WARNING: this is not the main SISCone trunk but //
// an adaptation to spherical coordinates //
// For more details, see http://projects.hepforge.org/siscone //
// //
// Copyright (c) 2006-2008 Gavin Salam and Gregory Soyez //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation; either version 2 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program; if not, write to the Free Software //
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA //
// //
// $Revision:: 255 $//
// $Date:: 2008-07-12 17:40:35 +0200 (Sat, 12 Jul 2008) $//
///////////////////////////////////////////////////////////////////////////////
#ifndef __SPH_VICINITY_H__
#define __SPH_VICINITY_H__
#include <siscone/vicinity.h>
#include <vector>
#include <list>
#include "momentum.h"
#include <siscone/defines.h>
#ifdef USE_QUADTREE_FOR_STABILITY_TEST
#include <siscone/quadtree.h>
#endif
namespace siscone_spherical{
/**
* \class CSphvicinity_elm
* \brief element in the vicinity of a parent.
*
* class used to manage one points in the vicinity
* of a parent point.
*/
class CSphvicinity_elm{
public:
/// pointer to the second borderline particle
CSphmomentum *v;
/// variable to tell if the particle is inside or outside the cone
siscone::Cvicinity_inclusion *is_inside;
// centre variables
CSph3vector centre; ///< direction of the centre
double angle; ///< angle with parent
bool side; ///< true if angle on the positive side, false otherwise
double cocircular_range; ///< amount by which the angle can be varied while
///< maintaining this point within co-circularity margin
/// list of elements co-circular with this one
/// NB: empty list uses less mem than vector
std::list<CSphvicinity_elm * > cocircular;
};
/// ordering pointers to CSphvicinity_elm
bool ve_less(CSphvicinity_elm *ve1, CSphvicinity_elm *ve2);
/**
* \class CSphvicinity
* \brief list of element in the vicinity of a parent.
*
* class used to manage the points which are in the vicinity
* of a parent point.
*/
class CSphvicinity{
public:
/// default constructor
CSphvicinity();
/// constructor with initialisation (see set_particle_list)
CSphvicinity(std::vector<CSphmomentum> &_particle_list);
/// default destructor
~CSphvicinity();
/**
* set the particle_list
* \param _particle_list list of particles (type CSphmomentum)
*/
void set_particle_list(std::vector<CSphmomentum> &_particle_list);
/**
* build the vicinity list from the list of points.
* \param _parent reference particle
* \param _VR vicinity radius
*/
void build(CSphmomentum *_parent, double _VR);
// cone kinematical information
CSphmomentum *parent; ///< parent vector
double VR; ///< radius of the vicinity
double VR2; ///< squared radius of the vicinity
double cosVR; ///< cosine of the radius of the vicinity
double R; ///< normal radius
double R2; ///< squared normal radius
double tan2R; ///< squared tangent of the normal radius
double D2_R; ///< euclidian distance (squared) corresp. to the arc R
double inv_R_EPS_COCIRC; ///< R / EPSILON_COCIRCULAR
double inv_R_2EPS_COCIRC; ///< R / (2*EPSILON_COCIRCULAR)
// particle list information
int n_part; ///< number of particles
std::vector<CSphmomentum> plist; ///< the list of particles
/// the inclusion state of particles
std::vector<siscone::Cvicinity_inclusion> pincluded;
CSphvicinity_elm *ve_list; ///< list of vicinity elements built from particle list (size=2*n)
#ifdef USE_QUADTREE_FOR_STABILITY_TEST
siscone::Cquadtree *quadtree; ///< quadtree used for final stability tests
#endif
// vicinity information
std::vector<CSphvicinity_elm*> vicinity; ///< list of points in parent's vicinity
unsigned int vicinity_size; ///< number of elements in vicinity
protected:
/**
* append a particle to the 'vicinity' list after
* having tested it and computed the angular-ordering quantities
* \param v vector to test
*/
void append_to_vicinity(CSphmomentum *v);
// internal variables
CSph3vector parent_centre; ///< parent centre
CSph3vector angular_dir1; ///< main direction to measure angles
CSph3vector angular_dir2; ///< second direction to measure angles (sign)
};
}
#endif
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