rm last use of GisasDirection::zReflected

Base/Vector/GisasDirection.h

@@ -39,8 +39,6 @@ public:
     //! Returns Cartesian 3D vector, where alpha, phi parameterize declination away from (r,0,0)
     R3 declinationVector(double r) const;
 
-    GisasDirection zReflected() const { return {-m_alpha, m_phi}; }
-
 private:
     double m_alpha; //!< declination in +z direction
     double m_phi;   //!< declination in -y direction

GUI/Model/Device/InstrumentItems.cpp

@@ -505,7 +505,7 @@ std::shared_ptr<Instrument> Instrument2DItem::createInstrument() const
 {
     auto beam = beamItem()->createBeam();
     auto detector = detectorItem()->createDetector();
-    detector->setDetectorNormal(beam->direction().zReflected().declinationVector(1));
+    detector->setDetectorNormal(beam->ki());
 
     return std::make_shared<Instrument>(beam, *detector);
 }
@@ -516,7 +516,7 @@ ScatteringSimulation* Instrument2DItem::createScatteringSimulation(const MultiLa
     beam->setPolarization(m_polarization);
     auto detector = detectorItem()->createDetector();
     detector->setAnalyzer(m_analyzerDirection, m_analyzerEfficiency, m_analyzerTotalTransmission);
-    detector->setDetectorNormal(beam->direction().zReflected().declinationVector(1));
+    detector->setDetectorNormal(beam->ki());
 
     auto* result = new ScatteringSimulation(*beam, sample, *detector);
     return result;
@@ -528,7 +528,7 @@ OffspecSimulation* Instrument2DItem::createOffspecSimulation(const MultiLayer& s
     beam->setPolarization(m_polarization);
     auto detector = detectorItem()->createDetector();
     detector->setAnalyzer(m_analyzerDirection, m_analyzerEfficiency, m_analyzerTotalTransmission);
-    detector->setDetectorNormal(beam->direction().zReflected().declinationVector(1));
+    detector->setDetectorNormal(beam->ki());
 
     auto* result = new OffspecSimulation(*beam, sample, *detector);
     return result;