#ifndef _OWLPS_POSITIONING_MULTILATERATIONMETHOD_HH_
#define _OWLPS_POSITIONING_MULTILATERATIONMETHOD_HH_

class AccessPoint ;

#include "point3d.hh"

#include <boost/tr1/unordered_map.hpp>

/// Super-class of all multilateration methods
/**
 * The source data is a list of access points associated with the
 * distances to the mobile. These distances are estimated using a
 * MultilaterationAlgorithm.
 */
class MultilaterationMethod
{
public:
  MultilaterationMethod(void) {}
  virtual ~MultilaterationMethod(void) {}

  /// Selects a point in 3D space
  virtual Point3D multilaterate(
    const std::tr1::unordered_map<AccessPoint*, float> &ap_distances) = 0 ;

  /// Selects a point in 2D space, given its vertical coordinate (z)
  virtual Point3D multilaterate_2d(
    const std::tr1::unordered_map<AccessPoint*, float> &ap_distances,
    float z) = 0 ;
} ;

#endif // _OWLPS_POSITIONING_MULTILATERATIONMETHOD_HH_