/**
* Method rewrites Reco Signal to Phys Signal.
* Time of Signal set to time of the Leading Signal Channel at the lowest threshold.
* Other fields are set to -1, quality fields set to 0.
*/
JPetPhysSignal SignalTransformer::createPhysSignal(const JPetRecoSignal& recoSignal)
{
JPetPhysSignal physSignal;
physSignal.setRecoSignal(recoSignal);
physSignal.setPhe(-1.0);
physSignal.setQualityOfPhe(0.0);
physSignal.setQualityOfTime(0.0);
physSignal.setRecoFlag(recoSignal.getRecoFlag());
std::vector<JPetSigCh> leadingSigChVec = recoSignal.getRawSignal().getPoints(
JPetSigCh::Leading, JPetRawSignal::ByThrValue
);
physSignal.setTime(leadingSigChVec.at(0).getValue());
return physSignal;
}
JPetPhysSignal JPetSimplePhysSignalReco::createPhysSignal(JPetRecoSignal& recoSignal)
{
// create a Phys Signal
JPetPhysSignal physSignal;
// use the values from Reco Signal to set the physical properties of signal
// here, a dummy example - much more sophisticated procedures should go here
physSignal.setPhe( recoSignal.getCharge() * 1.0 + 0.0 );
physSignal.setQualityOfPhe(1.0);
// in the previous module (C2) we have reconstructed one time at arbitrary
// threshold - now we retrieve it by getting a map of times vs. thresholds,
// and taking its first (and only) element by the begin() iterator. We get
// an std::pair, where first is the threshold value, and second is time.
double time = recoSignal.getRecoTimesAtThreshold().begin()->second;
// -----------------------------------------------------------
//
// Estimate the time of the signal based on raw signal samples
JPetRawSignal rawSignal = recoSignal.getRawSignal();
if (rawSignal.getNumberOfPoints(JPetSigCh::Leading) >= 2
&& rawSignal.getNumberOfPoints(JPetSigCh::Trailing) >= 2) {
// get number of points on leading edge
int iNumPoints = rawSignal.getNumberOfPoints(JPetSigCh::Leading);
std::vector<JPetSigCh> leadingPoints = rawSignal.getPoints(
JPetSigCh::Leading, JPetRawSignal::ByThrValue);
// create vectors
vector<float> vecTime(iNumPoints);
vector<float> vecVolt(iNumPoints);
for (int j = 0; j < iNumPoints; j++) {
vecTime(j) = leadingPoints.at(j).getValue();
vecVolt(j) = leadingPoints.at(j).getThreshold();
}
// To evaluate time below parameters should be specified:
// the parameter alfa of the below expression need to be specified:
// vecVolt = a(t - vecTime)^(alfa);
// Here alfa is fixed for the linear case.
// Caution! alfa has to be an integer and positive value, negative values are ignored.
int alfa = getAlpha();
// thr_sel specifies the threshold level to read the time value,
// and with thr_sel the below equation may be solved:
// thr_sel = a(t - time)^(alfa);
// Caution! thr_sel has to negative, and for positive values the program will set thr_sel equal to 0.
float thr_sel = getThresholdSel();
// The evaluation of time based on alfa and thr_sel
assert(thr_sel < 0);
assert(alfa > 0);
time = static_cast<double>(polynomialFit(vecTime, vecVolt, alfa, thr_sel));
}
// ------------------------------------------------------------
physSignal.setTime(time);
physSignal.setQualityOfTime(1.0);
// store the original JPetRecoSignal in the PhysSignal as a processing history
physSignal.setRecoSignal(recoSignal);
return physSignal;
}