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// $Id: DetectorConstruction.cc,v 1.1 2007/11/16 14:29:33 kmura Exp $
// $Name:  $
//
// ====================================================================
//   DetectorConstruction.cc
//
//                                   2007 Q
// ====================================================================
#include "DetectorConstruction.hh"
#include "VoxelParam.hh"
#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVParameterised.hh"
#include "VoxelSD.hh"
#include "G4VisAttributes.hh"

typedef G4LogicalVolume G4LV;
typedef G4PVPlacement G4PVP;
typedef G4VisAttributes G4VA;

// ====================================================================
//
// class description
//
// ====================================================================

////////////////////////////////////////////
DetectorConstruction::DetectorConstruction()
////////////////////////////////////////////
{
}

/////////////////////////////////////////////
DetectorConstruction::~DetectorConstruction()
/////////////////////////////////////////////
{
}

////////////////////////////////////////////////////
G4VPhysicalVolume* DetectorConstruction::Construct()
////////////////////////////////////////////////////
{
  G4NistManager* nistManager= G4NistManager::Instance();
  G4VisAttributes* va;

  // ==============================================================
  // world volume
  // ==============================================================
  const G4double DXYZ_WORLD= 200.*cm;
  G4Box* sld_world= new G4Box("world", 
                              DXYZ_WORLD/2., DXYZ_WORLD/2., DXYZ_WORLD/2.);

  G4Material* vacuum= nistManager-> FindOrBuildMaterial("G4_Galactic");
  G4LV* lv_world= new G4LogicalVolume(sld_world, vacuum, "world");
  G4PVP* world= new G4PVPlacement(0, G4ThreeVector(), "AREA", 
                                  lv_world, 0, false, 0);
  // vis. attributes
  va= new G4VA(G4Color(1.,1.,1.));
  va-> SetVisibility(false);
  lv_world-> SetVisAttributes(va);
  
  // ==============================================================
  // water phantom
  // ==============================================================
  const G4double DXY_PHANTOM= 20.*cm;
  const G4double DZ_PHANTOM= 50.*cm;

  G4Box* sld_phantom= new G4Box("phantom", 
                                DXY_PHANTOM/2., DXY_PHANTOM/2., DZ_PHANTOM/2.);

  G4Material* water= nistManager-> FindOrBuildMaterial("G4_WATER");
  G4LV* lv_phantom= new G4LogicalVolume(sld_phantom, 
                                        water, "phantom");

  va= new G4VA(G4Color(0.,1.,1.));
  lv_phantom-> SetVisAttributes(va);
  
  new G4PVP(0, G4ThreeVector(), lv_phantom, "phantom", lv_world, false, 0);

  // --------------------------------------------------------------
  // voxel planes
  const G4double DXY_VXP= 20.*cm;
  const G4double DZ_VXP= 1.*mm;

  G4Box* sld_vxp= new G4Box("vxplane", DXY_VXP/2., DXY_VXP/2., DZ_VXP/2.);
  G4LV* lv_vxp= new G4LV(sld_vxp, water, "vxplane");

  va= new G4VA(G4Color(1.,0.,0.));
  va-> SetVisibility(false);
  lv_vxp-> SetVisAttributes(va);

  for (G4int iz=0; iz<500; iz++) {
    G4double z0= -DZ_PHANTOM/2. + (iz+0.5)*DZ_VXP;
    new G4PVP(0, G4ThreeVector(0.,0.,z0), 
              lv_vxp, "vxplane", lv_phantom,
              false, 1000+iz);
  }

  // --------------------------------------------------------------
  // voxel parameterized

  G4Box* sld_voxel= new G4Box("voxel",1.,1.,1.); // dummy
  G4LV* lv_voxel= new G4LV(sld_voxel, water, "voxel");
  lv_voxel-> SetSensitiveDetector(new VoxelSD("voxel"));

  va= new G4VA(G4Color(0.,1.,1.));
  va-> SetVisibility(false);
  lv_voxel-> SetVisAttributes(va);

  const G4int nvoxels= 100*100;
  new G4PVParameterised("voxle", lv_voxel, lv_vxp,
                        kUndefined, nvoxels, new VoxelParam());


  return world;
}