/usr/include/siscone/vicinity.h is in libsiscone-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. //
// For more details, see http://projects.hepforge.org/siscone //
// //
// Copyright (c) 2006 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:: 123 $//
// $Date:: 2007-03-01 02:52:16 +0100 (Thu, 01 Mar 2007) $//
///////////////////////////////////////////////////////////////////////////////
#ifndef __VICINITY_H__
#define __VICINITY_H__
#include <vector>
#include <list>
#include "momentum.h"
#include "defines.h"
#include "quadtree.h"
namespace siscone{
/**
* \class Cvicinity_inclusion
* \brief a class to keep track of inclusion status in cone and in cocircular region
* while using minimal resources
*/
class Cvicinity_inclusion {
public:
/// default ctor
Cvicinity_inclusion() : cone(false), cocirc(false) {}
bool cone; ///< flag for particle inclusion in the cone
bool cocirc; ///< flag for particle inclusion in the border
};
/**
* \class Cvicinity_elm
* \brief element in the vicinity of a parent.
*
* class used to manage one points in the vicinity
* of a parent point.
*/
class Cvicinity_elm{
public:
/// pointer to the second borderline particle
Cmomentum *v;
/// variable to tell if the particle is inside or outside the cone
Cvicinity_inclusion *is_inside;
// centre variables
double eta; ///< eta coordinate of the center
double phi; ///< phi coordinate of the center
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<Cvicinity_elm * > cocircular;
};
/// ordering pointers to Cvicinity_elm
bool ve_less(Cvicinity_elm *ve1, Cvicinity_elm *ve2);
/**
* \class Cvicinity
* \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 Cvicinity{
public:
/// default constructor
Cvicinity();
/// constructor with initialisation (see set_particle_list)
Cvicinity(std::vector<Cmomentum> &_particle_list);
/// default destructor
~Cvicinity();
/**
* set the particle_list
* \param _particle_list list of particles (type Cmomentum)
*/
void set_particle_list(std::vector<Cmomentum> &_particle_list);
/**
* build the vicinity list from the list of points.
* \param _parent reference particle
* \param _VR vicinity radius
*/
void build(Cmomentum *_parent, double _VR);
// cone kinematical information
Cmomentum *parent; ///< parent vector
double VR; ///< radius of the vicinity
double VR2; ///< squared radius of the vicinity
double R; ///< normal radius
double R2; ///< squared normal radius
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<Cmomentum> plist; ///< the list of particles
std::vector<Cvicinity_inclusion> pincluded; ///< the inclusion state of particles
Cvicinity_elm *ve_list; ///< list of vicinity elements built from particle list (size=2*n)
#ifdef USE_QUADTREE_FOR_STABILITY_TEST
Cquadtree *quadtree; ///< quadtree used for final stability tests
#endif
// vicinity information
std::vector<Cvicinity_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(Cmomentum *v);
// internal variables
double pcx; ///< parent centre (eta)
double pcy; ///< parent centre (phi)
};
}
#endif
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