Exemplo n.º 1
0
/**
 * Gets the eFixed value from the workspace using the instrument parameters.
 *
 * @param ws Pointer to the workspace
 * @return eFixed value
 */
double IndirectTab::getEFixed(Mantid::API::MatrixWorkspace_sptr ws) {
  Mantid::Geometry::Instrument_const_sptr inst = ws->getInstrument();
  if (!inst)
    throw std::runtime_error("No instrument on workspace");

  // Try to get the parameter form the base instrument
  if (inst->hasParameter("Efixed"))
    return inst->getNumberParameter("Efixed")[0];

  // Try to get it form the analyser component
  if (inst->hasParameter("analyser")) {
    std::string analyserName = inst->getStringParameter("analyser")[0];
    auto analyserComp = inst->getComponentByName(analyserName);

    if (analyserComp && analyserComp->hasParameter("Efixed"))
      return analyserComp->getNumberParameter("Efixed")[0];
  }

  throw std::runtime_error("Instrument has no efixed parameter");
}
Exemplo n.º 2
0
/**
 * Attempt to extract an instrument double parameter from a specified
 * instrument.
 *
 * @param instrument    The instrument to extract the parameter from.
 * @param parameterName The name of the parameter to extract.
 *
 * @return              The extracted parameter if it is found, else
 *                      boost::none.
 */
boost::optional<double> CalculatePaalmanPings::getInstrumentParameter(
    Mantid::Geometry::Instrument_const_sptr instrument,
    const std::string &parameterName) {

  if (instrument->hasParameter(parameterName)) {
    const auto parameterValue = QString::fromStdString(
        instrument->getStringParameter(parameterName)[0]);
    return parameterValue.toDouble();
  }
  return boost::none;
}