use new c'tor in Py export

Sim/Export/SimulationToPython.cpp

@@ -148,26 +148,12 @@ std::string defineDetector(const IDetector& detector)
         result << ")\n";
     } else if (const auto* const det = dynamic_cast<const FlatDetector*>(&detector)) {
         result << "\n";
-        result << indent() << "detector = ba.FlatDetector(" << det->xSize() << ", "
-               << Py::Fmt::printDouble(det->width()) << ", " << det->ySize() << ", "
-               << Py::Fmt::printDouble(det->height()) << ")\n";
-        if (det->getDetectorArrangment() == FlatDetector::X) {
-            result << indent() << "detector.setPerpendicularToSampleX("
-                   << Py::Fmt::printDouble(det->getDistance()) << ", "
-                   << Py::Fmt::printDouble(det->getU0()) << ", "
-                   << Py::Fmt::printDouble(det->getV0()) << ")\n";
-        } else if (det->getDetectorArrangment() == FlatDetector::T) {
-            result << indent() << "detector.setPerpendicularToDirectBeam("
-                   << Py::Fmt::printDouble(det->getDistance()) << ", "
-                   << Py::Fmt::printDouble(det->getU0()) << ", "
-                   << Py::Fmt::printDouble(det->getV0()) << ")\n";
-        } else if (det->getDetectorArrangment() == FlatDetector::R) {
-            result << indent() << "detector.setPerpendicularToReflectedBeam("
-                   << Py::Fmt::printDouble(det->getDistance()) << ", "
-                   << Py::Fmt::printDouble(det->getU0()) << ", "
-                   << Py::Fmt::printDouble(det->getV0()) << ")\n";
-        } else
-            ASSERT_NEVER; // unknown alignment
+        result << indent() << "detector = ba.FlatDetector(" << det->xSize() << ", " << det->ySize()
+               << ", " << Py::Fmt::printDouble(det->width()) << ", "
+               << Py::Fmt::printDouble(det->height()) << ", beam, ba.FlatDetector."
+               << det->normalName() << ", " << Py::Fmt::printDouble(det->getDistance()) << ", " << 0
+               << ", " << 0 << ", " << 0 << ", " << det->getU0() - det->width() / 2 << ", "
+               << det->getV0() - det->height() / 2 << ")\n";
     } else
         ASSERT_NEVER; // unknown detector
     if (detector.hasExplicitRegionOfInterest()) {