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// Author: P. Arce
// History: 30.11.07  First version
//*******************************************************
//
// DicomDetectorConstruction.hh :
//	- Start the building of the geometry
//	- Initialisation of materials
//      - Creation of the world 
//	- Reading of the DICOM data
//*******************************************************

#ifndef DicomDetectorConstruction_h
#define DicomDetectorConstruction_h 1

#include "globals.hh"
#include "G4VUserDetectorConstruction.hh"
#include "DicomPatientZSliceHeader.hh"

class G4Material;
class G4Box;
class G4LogicalVolume;

class DicomDetectorConstruction : public G4VUserDetectorConstruction
{
public:

  DicomDetectorConstruction();
  ~DicomDetectorConstruction();

  G4VPhysicalVolume* Construct();
  // trigger the construction of the geometry

protected:
  void InitialisationOfMaterials();
  // create the original materials

  void ReadPatientData();
  // read the DICOM files describing the patient

  void ReadPatientDataFile(const G4String& fname);
  // read one of the DICOM files describing the patient (usually one per Z slice). Build a DicomPatientZSliceHeader for each file

  void MergeZSliceHeaders();
  // merge the slice headers of all the files

  G4Material* BuildMaterialWithChangingDensity( const G4Material* origMate, float density, G4String newMateName );
  // build a new material if the density of the voxel is different to the other voxels

  G4String ftoa(float flo);
  // convert a float to a string

  void ConstructPatientContainer();
  virtual void ConstructPatient() = 0;
  // construct the patient volumes. This method should be implemented for each of the derived classes

protected:
  G4Material* air;

  // World ...
  G4Box* world_solid;
  G4LogicalVolume* world_logic;
  G4VPhysicalVolume* world_phys;

  G4Box* container_solid;
  G4LogicalVolume* container_logic;
  G4VPhysicalVolume* container_phys;

  G4int fNoFiles; // number of DICOM files
  std::vector<G4Material*> fOriginalMaterials;  // list of original materials 
  std::vector<G4Material*> fMaterials;  // list of new materials created to distinguish different density voxels that have the same original materials
  size_t* fMateIDs; // index of material of each voxel

  std::map<G4int,G4double> fDensityDiffs; // Density difference to distinguish material for each original material (by index)
 
  std::vector<DicomPatientZSliceHeader*> fZSliceHeaders; // list of z slice header (one per DICOM files)
  DicomPatientZSliceHeader* fZSliceHeaderMerged; // z slice header resulted from merging all z slice headers

  G4int nVoxelX, nVoxelY, nVoxelZ;
  G4double voxelHalfDimX,  voxelHalfDimY, voxelHalfDimZ;
};

#endif