Fixed rotation matrix

src/ffi_ZDC.cpp

@@ -76,7 +76,7 @@ static Ref_t createDetector(Detector& desc, xml_h e, SensitiveDetector sens)
 
   DetElement   det(detName, detID);
   Volume       motherVol = desc.pickMotherVolume(det);
-  Transform3D  tr(RotationZYX(rot.z(), rot.y(), rot.x()), Position(pos.x(), pos.y(), pos.z()));
+  Transform3D  tr(RotationZYX(rot.z(), -rot.y(), rot.x()), Position(pos.x(), pos.y(), pos.z()));
   PlacedVolume detPV = motherVol.placeVolume(detVol, tr);
   detPV.addPhysVolID("system", detID);
   det.setPlacement(detPV);