void SaveNexusProcessed::appendEventListData(std::vector<T> events,
size_t offset, double *tofs,
float *weights,
float *errorSquareds,
int64_t *pulsetimes) {
// Do nothing if there are no events.
if (events.empty())
return;
typename std::vector<T>::const_iterator it;
typename std::vector<T>::const_iterator it_end = events.end();
size_t i = offset;
// Fill the C-arrays with the fields from all the events, as requested.
for (it = events.begin(); it != it_end; it++) {
if (tofs)
tofs[i] = it->tof();
if (weights)
weights[i] = static_cast<float>(it->weight());
if (errorSquareds)
errorSquareds[i] = static_cast<float>(it->errorSquared());
if (pulsetimes)
pulsetimes[i] = it->pulseTime().totalNanoseconds();
i++;
}
}
void UnaryOperation::unaryOperationEventHelper(std::vector<T> &wevector) {
typename std::vector<T>::iterator it;
for (it = wevector.begin(); it < wevector.end(); ++it) {
double yout, eout;
// Call the abstract function, passing in the current values
performUnaryOperation(it->tof(), it->weight(),
std::sqrt(it->errorSquared()), yout, eout);
it->m_weight = static_cast<float>(yout);
it->m_errorSquared = static_cast<float>(eout * eout);
}
}
void NexusFileIO::writeEventListData( std::vector<T> events, bool writeTOF, bool writePulsetime, bool writeWeight, bool writeError) const
{
// Do nothing if there are no events.
if (events.empty())
return;
size_t num = events.size();
double * tofs = new double[num];
double * weights = new double[num];
double * errorSquareds = new double[num];
int64_t * pulsetimes = new int64_t[num];
typename std::vector<T>::const_iterator it;
typename std::vector<T>::const_iterator it_end = events.end();
size_t i = 0;
// Fill the C-arrays with the fields from all the events, as requested.
for (it = events.begin(); it != it_end; it++)
{
if (writeTOF) tofs[i] = it->tof();
if (writePulsetime) pulsetimes[i] = it->pulseTime().totalNanoseconds();
if (writeWeight) weights[i] = it->weight();
if (writeError) errorSquareds[i] = it->errorSquared();
i++;
}
// Write out all the required arrays.
int dims_array[1] = { static_cast<int>(num) };
// In this mode, compressing makes things extremely slow! Not to be used for managed event workspaces.
bool compress = true; //(num > 100);
if (writeTOF)
NXwritedata("tof", NX_FLOAT64, 1, dims_array, (void *)(tofs), compress);
if (writePulsetime)
NXwritedata("pulsetime", NX_INT64, 1, dims_array, (void *)(pulsetimes), compress);
if (writeWeight)
NXwritedata("weight", NX_FLOAT32, 1, dims_array, (void *)(weights), compress);
if (writeError)
NXwritedata("error_squared", NX_FLOAT32, 1, dims_array, (void *)(errorSquareds), compress);
// Free mem.
delete [] tofs;
delete [] weights;
delete [] errorSquareds;
delete [] pulsetimes;
}
size_t ConvToMDEventsWS::convertEventList(size_t workspaceIndex) {
const Mantid::DataObjects::EventList &el =
m_EventWS->getEventList(workspaceIndex);
size_t numEvents = el.getNumberEvents();
if (numEvents == 0)
return 0;
// create local unit conversion class
UnitsConversionHelper localUnitConv(m_UnitConversion);
uint32_t detID = m_detID[workspaceIndex];
uint16_t runIndexLoc = m_RunIndex;
std::vector<coord_t> locCoord(m_Coord);
// set up unit conversion and calculate up all coordinates, which depend on
// spectra index only
if (!m_QConverter->calcYDepCoordinates(locCoord, workspaceIndex))
return 0; // skip if any y outsize of the range of interest;
localUnitConv.updateConversion(workspaceIndex);
//
// allocate temporary buffers for MD Events data
// MD events coordinates buffer
std::vector<coord_t> allCoord;
std::vector<float> sig_err; // array for signal and error.
std::vector<uint16_t> run_index; // Buffer for run index for each event
std::vector<uint32_t> det_ids; // Buffer of det Id-s for each event
allCoord.reserve(this->m_NDims * numEvents);
sig_err.reserve(2 * numEvents);
run_index.reserve(numEvents);
det_ids.reserve(numEvents);
// This little dance makes the getting vector of events more general (since
// you can't overload by return type).
typename std::vector<T> const *events_ptr;
getEventsFrom(el, events_ptr);
const typename std::vector<T> &events = *events_ptr;
// Iterators to start/end
typename std::vector<T>::const_iterator it = events.begin();
typename std::vector<T>::const_iterator it_end = events.end();
it = events.begin();
for (; it != it_end; it++) {
double val = localUnitConv.convertUnits(it->tof());
double signal = it->weight();
double errorSq = it->errorSquared();
if (!m_QConverter->calcMatrixCoord(val, locCoord, signal, errorSq))
continue; // skip ND outside the range
sig_err.push_back(float(signal));
sig_err.push_back(float(errorSq));
run_index.push_back(runIndexLoc);
det_ids.push_back(detID);
allCoord.insert(allCoord.end(), locCoord.begin(), locCoord.end());
}
// Add them to the MDEW
size_t n_added_events = run_index.size();
m_OutWSWrapper->addMDData(sig_err, run_index, det_ids, allCoord,
n_added_events);
return n_added_events;
}
void ConvertToDiffractionMDWorkspace::convertEventList(int workspaceIndex, EventList & el)
{
size_t numEvents = el.getNumberEvents();
MDEvents::MDBoxBase<MDEvents::MDLeanEvent<3>,3> * box = ws->getBox();
// Get the position of the detector there.
const std::set<detid_t>& detectors = el.getDetectorIDs();
if (!detectors.empty())
{
// Get the detector (might be a detectorGroup for multiple detectors)
// or might return an exception if the detector is not in the instrument definition
IDetector_const_sptr det;
try
{
det = m_inWS->getDetector(workspaceIndex);
}
catch (Exception::NotFoundError &)
{
this->failedDetectorLookupCount++;
return;
}
// Vector between the sample and the detector
V3D detPos = det->getPos() - samplePos;
// Neutron's total travelled distance
double distance = detPos.norm() + l1;
// Detector direction normalized to 1
V3D detDir = detPos / detPos.norm();
// The direction of momentum transfer in the inelastic convention ki-kf
// = input beam direction (normalized to 1) - output beam direction (normalized to 1)
V3D Q_dir_lab_frame = beamDir - detDir;
// Multiply by the rotation matrix to convert to Q in the sample frame (take out goniometer rotation)
// (or to HKL, if that's what the matrix is)
V3D Q_dir = mat * Q_dir_lab_frame;
// For speed we extract the components.
coord_t Q_dir_x = coord_t(Q_dir.X()); coord_t Q_dir_y = coord_t(Q_dir.Y());
coord_t Q_dir_z = coord_t(Q_dir.Z());
// For lorentz correction, calculate sin(theta))^2
double sin_theta_squared = 0;
if (LorentzCorrection)
{
// Scattering angle = 2 theta = angle between neutron beam direction and the detector (scattering) direction
// The formula for Lorentz Correction is sin(theta), i.e. sin(half the scattering angle)
double theta = detDir.angle(beamDir) / 2.0;
sin_theta_squared = sin(theta);
sin_theta_squared = sin_theta_squared * sin_theta_squared; // square it
}
/** Constant that you divide by tof (in usec) to get wavenumber in ang^-1 :
* Wavenumber (in ang^-1) = (PhysicalConstants::NeutronMass * distance) / ((tof (in usec) * 1e-6) * PhysicalConstants::h_bar) * 1e-10; */
const double wavenumber_in_angstrom_times_tof_in_microsec =
(PhysicalConstants::NeutronMass * distance * 1e-10) / (1e-6 * PhysicalConstants::h_bar);
//PARALLEL_CRITICAL( convert_tester_output ) { std::cout << "Spectrum " << el.getSpectrumNo() << " beamDir = " << beamDir << " detDir = " << detDir << " Q_dir = " << Q_dir << " conversion factor " << wavenumber_in_angstrom_times_tof_in_microsec << std::endl; }
//g_log.information() << wi << " : " << el.getNumberEvents() << " events. Pos is " << detPos << std::endl;
//g_log.information() << Q_dir.norm() << " Qdir norm" << std::endl;
// This little dance makes the getting vector of events more general (since you can't overload by return type).
typename std::vector<T> * events_ptr;
getEventsFrom(el, events_ptr);
typename std::vector<T> & events = *events_ptr;
// Iterators to start/end
typename std::vector<T>::iterator it = events.begin();
typename std::vector<T>::iterator it_end = events.end();
for (; it != it_end; it++)
{
// Get the wavenumber in ang^-1 using the previously calculated constant.
coord_t wavenumber = coord_t(wavenumber_in_angstrom_times_tof_in_microsec / it->tof());
// Q vector = K_final - K_initial = wavenumber * (output_direction - input_direction)
coord_t center[3] = {Q_dir_x * wavenumber, Q_dir_y * wavenumber, Q_dir_z * wavenumber};
// Check that the event is within bounds
if (center[0] < m_extentsMin[0] || center[0] >= m_extentsMax[0]) continue;
if (center[1] < m_extentsMin[1] || center[1] >= m_extentsMax[1]) continue;
if (center[2] < m_extentsMin[2] || center[2] >= m_extentsMax[2]) continue;
if (LorentzCorrection)
{
//double lambda = 1.0/wavenumber;
// (sin(theta))^2 / wavelength^4
float correct = float( sin_theta_squared * wavenumber*wavenumber*wavenumber*wavenumber );
// Push the MDLeanEvent but correct the weight.
box->addEvent( MDE(float(it->weight()*correct), float(it->errorSquared()*correct*correct), center) );
}
else
{
// Push the MDLeanEvent with the same weight
box->addEvent( MDE(float(it->weight()), float(it->errorSquared()), center) );
}
}
// Clear out the EventList to save memory
if (ClearInputWorkspace)
{
// Track how much memory you cleared
size_t memoryCleared = el.getMemorySize();
// Clear it now
el.clear();
// For Linux with tcmalloc, make sure memory goes back, if you've cleared 200 Megs
MemoryManager::Instance().releaseFreeMemoryIfAccumulated(memoryCleared, (size_t)2e8);
}
}
prog->reportIncrement(numEvents, "Adding Events");
}