/** Execute the algorithm for a EventWorkspace input
* @param ws :: EventWorkspace
*/
void SmoothNeighbours::execEvent(Mantid::DataObjects::EventWorkspace_sptr ws) {
m_progress->resetNumSteps(inWS->getNumberHistograms(), 0.5, 1.0);
// Get some stuff from the input workspace
const size_t numberOfSpectra = outWI;
const int YLength = static_cast<int>(inWS->blocksize());
EventWorkspace_sptr outWS;
// Make a brand new EventWorkspace
outWS = boost::dynamic_pointer_cast<EventWorkspace>(
API::WorkspaceFactory::Instance().create(
"EventWorkspace", numberOfSpectra, YLength + 1, YLength));
// Copy geometry over.
API::WorkspaceFactory::Instance().initializeFromParent(*ws, *outWS, false);
// Ensure thread-safety
outWS->sortAll(TOF_SORT, nullptr);
this->setProperty("OutputWorkspace",
boost::dynamic_pointer_cast<MatrixWorkspace>(outWS));
// Go through all the output workspace
PARALLEL_FOR_IF(Kernel::threadSafe(*ws, *outWS))
for (int outWIi = 0; outWIi < int(numberOfSpectra); outWIi++) {
PARALLEL_START_INTERUPT_REGION
// Create the output event list (empty)
EventList &outEL = outWS->getSpectrum(outWIi);
// Which are the neighbours?
std::vector<weightedNeighbour> &neighbours = m_neighbours[outWIi];
std::vector<weightedNeighbour>::iterator it;
for (it = neighbours.begin(); it != neighbours.end(); ++it) {
size_t inWI = it->first;
// if(sum)outEL.copyInfoFrom(*ws->getSpectrum(inWI));
double weight = it->second;
// Copy the event list
EventList tmpEL = ws->getSpectrum(inWI);
// Scale it
tmpEL *= weight;
// Add it
outEL += tmpEL;
}
// Copy the single detector ID (of the center) and spectrum number from the
// input workspace
// if (!sum) outEL.copyInfoFrom(*ws->getSpectrum(outWIi));
m_progress->report("Summing");
PARALLEL_END_INTERUPT_REGION
}
PARALLEL_CHECK_INTERUPT_REGION
// Give the 0-th X bins to all the output spectra.
outWS->setAllX(inWS->binEdges(0));
if (expandSumAllPixels)
spreadPixels(outWS);
}
void EQSANSTofStructure::execEvent(
Mantid::DataObjects::EventWorkspace_sptr inputWS, double threshold,
double frame_offset, double tof_frame_width, double tmp_frame_width,
bool frame_skipping) {
const size_t numHists = inputWS->getNumberHistograms();
Progress progress(this, 0.0, 1.0, numHists);
// Get the nominal sample-to-detector distance (in mm)
Mantid::Kernel::Property *prop =
inputWS->run().getProperty("sample_detector_distance");
auto dp = dynamic_cast<Mantid::Kernel::PropertyWithValue<double> *>(prop);
if (!dp) {
throw std::runtime_error("sample_detector_distance log not found.");
}
const double SDD = *dp / 1000.0;
// Loop through the spectra and apply correction
PARALLEL_FOR1(inputWS)
for (int64_t ispec = 0; ispec < int64_t(numHists); ++ispec) {
IDetector_const_sptr det;
try {
det = inputWS->getDetector(ispec);
} catch (Exception::NotFoundError &) {
g_log.warning() << "Workspace index " << ispec
<< " has no detector assigned to it - discarding\n";
// 'continue' statement moved outside catch block because Mac Intel
// compiler has a problem with it being here in an openmp block.
}
if (!det)
continue;
// Get the flight path from the sample to the detector pixel
const V3D samplePos = inputWS->getInstrument()->getSample()->getPos();
const V3D scattered_flight_path = det->getPos() - samplePos;
// Sample-to-source distance
const V3D sourcePos = inputWS->getInstrument()->getSource()->getPos();
const V3D SSD = samplePos - sourcePos;
double tof_factor =
(SSD.norm() + scattered_flight_path.norm()) / (SSD.norm() + SDD);
PARALLEL_START_INTERUPT_REGION
// Get the pointer to the output event list
std::vector<TofEvent> &events = inputWS->getSpectrum(ispec).getEvents();
std::vector<TofEvent>::iterator it;
std::vector<TofEvent> clean_events;
for (it = events.begin(); it < events.end(); ++it) {
double newtof = it->tof();
newtof += frame_offset;
// Correct for the scattered neutron flight path
if (flight_path_correction)
newtof /= tof_factor;
while (newtof < threshold)
newtof += tmp_frame_width;
// Remove events that don't fall within the accepted time window
double rel_tof = newtof - frame_tof0;
double x = (static_cast<int>(floor(rel_tof * 10)) %
static_cast<int>(floor(tof_frame_width * 10))) *
0.1;
if (x < low_tof_cut || x > tof_frame_width - high_tof_cut) {
continue;
}
// At this point the events in the second frame are still off by a frame
if (frame_skipping && rel_tof > tof_frame_width)
newtof += tof_frame_width;
clean_events.emplace_back(newtof, it->pulseTime());
}
events.clear();
events.reserve(clean_events.size());
for (it = clean_events.begin(); it < clean_events.end(); ++it) {
events.push_back(*it);
}
progress.report("TOF structure");
PARALLEL_END_INTERUPT_REGION
}
PARALLEL_CHECK_INTERUPT_REGION
}