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///////////////////////////////////////////////////////////////////////////
//
// Process describing a straw tube radiator of X-ray transition radiation.
// Thicknesses of plates and gas gaps are gamma distributed.
// We suppose that:
// formation zone ~ mean thickness << absorption length
// for each material and in the range 1-100 keV. This allows us to simplify
// interference effects in radiator stack (GetStackFactor method).
//
// History:
// 22.04.05 V. Grichine, first version
// 28.09.07, V.Ivanchenko general cleanup without change of algorithms
//

#ifndef G4StrawTubeXTRadiator_h
#define G4StrawTubeXTRadiator_h 1

#include "globals.hh"
#include "G4LogicalVolume.hh"
#include "G4Material.hh"
#include "G4VXTRenergyLoss.hh"

class G4SandiaTable;

class G4StrawTubeXTRadiator : public G4VXTRenergyLoss
{
 public:
  explicit G4StrawTubeXTRadiator(
    G4LogicalVolume* anEnvelope, G4Material*, G4Material*, G4double, G4double,
    G4Material*, G4bool unishut = false,
    const G4String& processName = "StrawTubeXTRadiator");
  ~G4StrawTubeXTRadiator();

  // Auxiliary functions for plate/gas material parameters
  G4double GetMediumFormationZone(G4double, G4double, G4double);
  void ComputeMediumPhotoAbsCof();
  G4double GetMediumLinearPhotoAbs(G4double);
  G4complex GetMediumComplexFZ(G4double, G4double, G4double);

  G4double GetStackFactor(G4double energy, G4double gamma,
                          G4double varAngle) override;

  void ProcessDescription(std::ostream&) const override;
  void DumpInfo() const override { ProcessDescription(G4cout); };

 protected:
  G4SandiaTable* fMediumPhotoAbsCof;

  G4double fSigma3;

  G4int fMatIndex3;
};

#endif