130 lines
3.2 KiB
C++
130 lines
3.2 KiB
C++
/*
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* This file is part of the Owl Positioning System (OwlPS) project.
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* It is subject to the copyright notice and license terms in the
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* COPYRIGHT.t2t file found in the top-level directory of this
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* distribution and at
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* https://code.lm7.fr/mcy/owlps/src/master/COPYRIGHT.t2t
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* No part of the OwlPS Project, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms
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* contained in the COPYRIGHT.t2t file; the COPYRIGHT.t2t file must be
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* distributed along with this file, either separately or by replacing
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* this notice by the COPYRIGHT.t2t file's contents.
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*/
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#include "capturepoint.hh"
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#include "stock.hh"
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#include "posexcept.hh"
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using namespace std ;
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/* *** Operations *** */
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double CapturePoint::friis_constant_term() const
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{
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double wavelength =
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static_cast<double>(PosUtil::LIGHT_SPEED) / frequency ;
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return antenna_gain + 20 * log10(wavelength) - 20 * log10(4 * M_PI) ;
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}
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/**
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* @param trx The transmitter CP.
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* @returns The percentage of calibration packets sent by `trx` and
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* received by the CP.
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* @returns 0 if no packet were received from `trx.`
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*/
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float CapturePoint::
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received_calibration_from_cp(const CapturePoint &trx) const
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{
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if (this == &trx)
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return 100 ;
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// If no reference point is associated with trx, no CP received
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// any calibration from it:
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const ReferencePoint *ref_trx ;
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try
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{
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ref_trx = &Stock::get_reference_point(trx.coordinates) ;
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}
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catch (element_not_found &e)
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{
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return 0 ;
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}
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// Check if trx sent a calibration request:
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const vector<CalibrationRequest*> &ref_requests =
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ref_trx->get_requests(trx.mac_addr) ;
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if (ref_requests.empty())
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return 0 ;
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// Count the number of messages sent by trx and the number of
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// messages actually received by the CP:
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unsigned int
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received_packets = 0,
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expected_packets = 0 ;
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for (auto cr = ref_requests.begin() ; cr != ref_requests.end() ; ++cr)
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{
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const Measurement *const measurement =
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(*cr)->get_measurement(mac_addr) ;
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if (! measurement)
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continue ;
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received_packets += measurement->get_nb_ss() ;
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expected_packets += (*cr)->get_nb_packets() ;
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}
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if (expected_packets == 0)
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return 0 ;
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// Compute the score (percent):
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float score = received_packets * 100.0 / expected_packets ;
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return score ;
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}
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/* *** Operators *** */
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CapturePoint& CapturePoint::operator=(const CapturePoint &source)
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{
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if (this == &source)
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return *this ;
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this->WifiDevice::operator=(source) ;
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coordinates = source.coordinates ;
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frequency = source.frequency ;
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friis_index = source.friis_index ;
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return *this ;
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}
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bool CapturePoint::operator==(const CapturePoint &source) const
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{
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if (this == &source)
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return true ;
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return
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this->WifiDevice::operator==(source) &&
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coordinates == source.coordinates &&
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frequency == source.frequency &&
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friis_index == source.friis_index ;
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}
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ostream &operator<<(ostream &os, const CapturePoint &cp)
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{
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os
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<< "Coordinates: " << cp.coordinates << '\n'
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<< "Frequency: " << cp.frequency << " Hz" << '\n'
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<< "Friis index: " << cp.friis_index << '\n'
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<< static_cast<WifiDevice>(cp) ;
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return os ;
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}
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