/**
* A map detector ID and Q ranges
* This method looks unnecessary as it could be calculated on the fly but
* the parallelization means that lazy instantation slows it down due to the
* necessary CRITICAL sections required to update the cache. The Q range
* values are required very frequently so the total time is more than
* offset by this precaching step
*/
void SofQW2::initThetaCache(API::MatrixWorkspace_const_sptr workspace)
{
const size_t nhist = workspace->getNumberHistograms();
m_thetaPts = std::vector<double>(nhist);
size_t ndets(0);
double minTheta(DBL_MAX), maxTheta(-DBL_MAX);
for(int64_t i = 0 ; i < (int64_t)nhist; ++i) //signed for OpenMP
{
m_progress->report("Calculating detector angles");
IDetector_const_sptr det;
try
{
det = workspace->getDetector(i);
// Check to see if there is an EFixed, if not skip it
try
{
m_EmodeProperties.getEFixed(det);
}
catch(std::runtime_error&)
{
det.reset();
}
}
catch(Kernel::Exception::NotFoundError&)
{
// Catch if no detector. Next line tests whether this happened - test placed
// outside here because Mac Intel compiler doesn't like 'continue' in a catch
// in an openmp block.
}
// If no detector found, skip onto the next spectrum
if( !det || det->isMonitor() )
{
m_thetaPts[i] = -1.0; // Indicates a detector to skip
}
else
{
++ndets;
const double theta = workspace->detectorTwoTheta(det);
m_thetaPts[i] = theta;
if( theta < minTheta )
{
minTheta = theta;
}
else if( theta > maxTheta )
{
maxTheta = theta;
}
}
}
m_thetaWidth = (maxTheta - minTheta)/static_cast<double>(ndets);
g_log.information() << "Calculated detector width in theta=" << (m_thetaWidth*180.0/M_PI) << " degrees.\n";
}
/**
* Function that retrieves the two-theta and azimuthal angles from a given
* detector. It then looks up the nearest neighbours. Using those detectors,
* it calculates the two-theta and azimuthal angle widths.
* @param workspace : the workspace containing the needed detector information
*/
void SofQW3::getValuesAndWidths(API::MatrixWorkspace_const_sptr workspace)
{
// Trigger a build of the nearst neighbors outside the OpenMP loop
const int numNeighbours = 4;
const size_t nHistos = workspace->getNumberHistograms();
g_log.debug() << "Number of Histograms: " << nHistos << std::endl;
this->m_theta = std::vector<double>(nHistos);
this->m_thetaWidths = std::vector<double>(nHistos);
this->m_phi = std::vector<double>(nHistos);
this->m_phiWidths = std::vector<double>(nHistos);
for (size_t i = 0; i < nHistos; ++i)
{
m_progress->report("Calculating detector angular widths");
DetConstPtr detector = workspace->getDetector(i);
g_log.debug() << "Current histogram: " << i << std::endl;
specid_t inSpec = workspace->getSpectrum(i)->getSpectrumNo();
SpectraDistanceMap neighbours = workspace->getNeighboursExact(inSpec,
numNeighbours,
true);
g_log.debug() << "Current ID: " << inSpec << std::endl;
// Convert from spectrum numbers to workspace indices
double thetaWidth = -DBL_MAX;
double phiWidth = -DBL_MAX;
// Find theta and phi widths
double theta = workspace->detectorTwoTheta(detector);
double phi = detector->getPhi();
specid_t deltaPlus1 = inSpec + 1;
specid_t deltaMinus1 = inSpec - 1;
specid_t deltaPlusT = inSpec + this->m_detNeighbourOffset;
specid_t deltaMinusT = inSpec - this->m_detNeighbourOffset;
for (SpectraDistanceMap::iterator it = neighbours.begin();
it != neighbours.end(); ++it)
{
specid_t spec = it->first;
g_log.debug() << "Neighbor ID: " << spec << std::endl;
if (spec == deltaPlus1 || spec == deltaMinus1 ||
spec == deltaPlusT || spec == deltaMinusT)
{
DetConstPtr detector_n = workspace->getDetector(spec - 1);
double theta_n = workspace->detectorTwoTheta(detector_n);
double phi_n = detector_n->getPhi();
double dTheta = std::fabs(theta - theta_n);
double dPhi = std::fabs(phi - phi_n);
if (dTheta > thetaWidth)
{
thetaWidth = dTheta;
//g_log.debug() << "Current ThetaWidth: " << thetaWidth << std::endl;
}
if (dPhi > phiWidth)
{
phiWidth = dPhi;
//g_log.debug() << "Current PhiWidth: " << phiWidth << std::endl;
}
}
}
this->m_theta[i] = theta;
this->m_phi[i] = phi;
this->m_thetaWidths[i] = thetaWidth;
this->m_phiWidths[i] = phiWidth;
}
}
/** method does preliminary calculations of the detectors positions to convert
results into k-dE space ;
and places the results into static cash to be used in subsequent calls to this
algorithm */
void PreprocessDetectorsToMD::processDetectorsPositions(
const API::MatrixWorkspace_const_sptr &inputWS,
DataObjects::TableWorkspace_sptr &targWS) {
g_log.information()
<< "Preprocessing detector locations in a target reciprocal space\n";
//
Geometry::Instrument_const_sptr instrument = inputWS->getInstrument();
// this->pBaseInstr = instrument->baseInstrument();
//
Geometry::IComponent_const_sptr source = instrument->getSource();
Geometry::IComponent_const_sptr sample = instrument->getSample();
if ((!source) || (!sample)) {
g_log.error() << " Instrument is not fully defined. Can not identify "
"source or sample\n";
throw Kernel::Exception::InstrumentDefinitionError(
"Instrument not sufficiently defined: failed to get source and/or "
"sample");
}
// L1
try {
double L1 = source->getDistance(*sample);
targWS->logs()->addProperty<double>("L1", L1, true);
g_log.debug() << "Source-sample distance: " << L1 << std::endl;
} catch (Kernel::Exception::NotFoundError &) {
throw Kernel::Exception::InstrumentDefinitionError(
"Unable to calculate source-sample distance for workspace",
inputWS->getTitle());
}
// Instrument name
std::string InstrName = instrument->getName();
targWS->logs()->addProperty<std::string>(
"InstrumentName", InstrName,
true); // "The name which should unique identify current instrument");
targWS->logs()->addProperty<bool>("FakeDetectors", false, true);
// get access to the workspace memory
auto &sp2detMap = targWS->getColVector<size_t>("spec2detMap");
auto &detId = targWS->getColVector<int32_t>("DetectorID");
auto &detIDMap = targWS->getColVector<size_t>("detIDMap");
auto &L2 = targWS->getColVector<double>("L2");
auto &TwoTheta = targWS->getColVector<double>("TwoTheta");
auto &Azimuthal = targWS->getColVector<double>("Azimuthal");
auto &detDir = targWS->getColVector<Kernel::V3D>("DetDirections");
// Efixed; do we need one and does one exist?
double Efi = targWS->getLogs()->getPropertyValueAsType<double>("Ei");
float *pEfixedArray(nullptr);
const Geometry::ParameterMap &pmap = inputWS->constInstrumentParameters();
if (m_getEFixed)
pEfixedArray = targWS->getColDataArray<float>("eFixed");
// check if one needs to generate masked detectors column.
int *pMasksArray(nullptr);
if (m_getIsMasked)
pMasksArray = targWS->getColDataArray<int>("detMask");
//// progress message appearance
size_t div = 100;
size_t nHist = targWS->rowCount();
Mantid::API::Progress theProgress(this, 0, 1, nHist);
//// Loop over the spectra
uint32_t liveDetectorsCount(0);
for (size_t i = 0; i < nHist; i++) {
sp2detMap[i] = std::numeric_limits<uint64_t>::quiet_NaN();
detId[i] = std::numeric_limits<int32_t>::quiet_NaN();
detIDMap[i] = std::numeric_limits<uint64_t>::quiet_NaN();
L2[i] = std::numeric_limits<double>::quiet_NaN();
TwoTheta[i] = std::numeric_limits<double>::quiet_NaN();
Azimuthal[i] = std::numeric_limits<double>::quiet_NaN();
// detMask[i] = true;
// get detector or detector group which corresponds to the spectra i
Geometry::IDetector_const_sptr spDet;
try {
spDet = inputWS->getDetector(i);
} catch (Kernel::Exception::NotFoundError &) {
continue;
}
// Check that we aren't dealing with monitor...
if (spDet->isMonitor())
continue;
// if masked detectors state is not used, masked detectors just ignored;
bool maskDetector = spDet->isMasked();
if (m_getIsMasked)
*(pMasksArray + liveDetectorsCount) = maskDetector ? 1 : 0;
else if (maskDetector)
continue;
// calculate the requested values;
sp2detMap[i] = liveDetectorsCount;
detId[liveDetectorsCount] = int32_t(spDet->getID());
detIDMap[liveDetectorsCount] = i;
L2[liveDetectorsCount] = spDet->getDistance(*sample);
double polar = inputWS->detectorTwoTheta(spDet);
double azim = spDet->getPhi();
TwoTheta[liveDetectorsCount] = polar;
Azimuthal[liveDetectorsCount] = azim;
double sPhi = sin(polar);
double ez = cos(polar);
double ex = sPhi * cos(azim);
double ey = sPhi * sin(azim);
detDir[liveDetectorsCount].setX(ex);
detDir[liveDetectorsCount].setY(ey);
detDir[liveDetectorsCount].setZ(ez);
// double sinTheta=sin(0.5*polar);
// this->SinThetaSq[liveDetectorsCount] = sinTheta*sinTheta;
// specific code which should work and makes sense
// for indirect instrument but may be deployed on any code with Ei property
// defined;
if (pEfixedArray) {
try {
Geometry::Parameter_sptr par = pmap.getRecursive(spDet.get(), "eFixed");
if (par)
Efi = par->value<double>();
} catch (std::runtime_error &) {
}
// set efixed for each existing detector
*(pEfixedArray + liveDetectorsCount) = static_cast<float>(Efi);
}
liveDetectorsCount++;
if (i % div == 0)
theProgress.report(i, "Preprocessing detectors");
}
targWS->logs()->addProperty<uint32_t>("ActualDetectorsNum",
liveDetectorsCount, true);
theProgress.report();
g_log.information() << "Finished preprocessing detector locations. Found: "
<< liveDetectorsCount << " detectors out of: " << nHist
<< " histograms\n";
}
