C++ (Cpp) Instrument_const_sptr::getReferenceFrameの例

コード例 #1

ファイル: SpecularReflectionAlgorithm.cpp プロジェクト: mantidproject/mantid

/**
 * Calculate the twoTheta angle from the detector and sample locations.
 * @return: twoTheta
 */
double SpecularReflectionAlgorithm::calculateTwoTheta() const {
  MatrixWorkspace_sptr inWS = this->getProperty("InputWorkspace");

  const std::string analysisMode = this->getProperty("AnalysisMode");

  Instrument_const_sptr instrument = inWS->getInstrument();

  IComponent_const_sptr detector =
      this->getDetectorComponent(inWS, analysisMode == pointDetectorAnalysis);

  IComponent_const_sptr sample = this->getSurfaceSampleComponent(instrument);

  const V3D detSample = detector->getPos() - sample->getPos();

  boost::shared_ptr<const ReferenceFrame> refFrame =
      instrument->getReferenceFrame();

  const double upoffset = refFrame->vecPointingUp().scalar_prod(detSample);
  const double beamoffset =
      refFrame->vecPointingAlongBeam().scalar_prod(detSample);

  const double twoTheta = std::atan2(upoffset, beamoffset) * 180 / M_PI;

  return twoTheta;
}