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// Authors: S. Guatelli and M. G. Pia, INFN Genova, Italy
// 
// Based on code developed by the undergraduate student G. Guerrieri 
// Note: this is a preliminary beta-version of the code; an improved 
// version will be distributed in the next Geant4 public release, compliant
// with the design in a forthcoming publication, and subject to a 
// design and code review.
//
#include "G4MIRDBrain.hh"
#include "globals.hh"
#include "G4SDManager.hh"
#include "G4VisAttributes.hh"
#include "G4Ellipsoid.hh"
#include "G4ThreeVector.hh"
#include "G4VPhysicalVolume.hh"
#include "G4RotationMatrix.hh"
#include "G4Material.hh"
#include "G4LogicalVolume.hh"
#include "G4HumanPhantomMaterial.hh"
#include "G4VPhysicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4HumanPhantomColour.hh"

G4MIRDBrain::G4MIRDBrain()
{
}

G4MIRDBrain::~G4MIRDBrain()
{

}

G4VPhysicalVolume* G4MIRDBrain::Construct(const G4String& volumeName,G4VPhysicalVolume* mother,  
					       const G4String& colourName, G4bool wireFrame,G4bool sensitivity)
{
  G4cout << "Construct " << volumeName << G4endl;
 G4HumanPhantomMaterial* material = new G4HumanPhantomMaterial();
 G4Material* soft = material -> GetMaterial("soft_tissue");
 delete material;

 G4double ax = 6. * cm;
 G4double by= 9. * cm;
 G4double cz = 6.5 * cm;

 G4Ellipsoid* brain = new G4Ellipsoid("Brain", ax, by, cz);
 

  G4LogicalVolume* logicBrain =  new G4LogicalVolume(brain, soft, 
						     "logical" + volumeName,
						     0, 0, 0);
  
  // Define rotation and position here!
  G4VPhysicalVolume* physBrain = new G4PVPlacement(0,
						   G4ThreeVector(0.*cm, 0.*cm, 8.75 * cm),
						   "physicalBrain",
						   logicBrain,
						   mother,
						   false,
						   0, true);
  // Sensitive Body Part
  if (sensitivity==true)
  { 
    G4SDManager* SDman = G4SDManager::GetSDMpointer();
    logicBrain->SetSensitiveDetector( SDman->FindSensitiveDetector("BodyPartSD") );
  }


  // Visualization Attributes
  // G4VisAttributes* BrainVisAtt = new G4VisAttributes(G4Colour(0.41,0.41,0.41));
  G4HumanPhantomColour* colourPointer = new G4HumanPhantomColour();
  G4Colour colour = colourPointer -> GetColour(colourName);
  
  G4VisAttributes* BrainVisAtt = new G4VisAttributes(colour);
  BrainVisAtt->SetForceSolid(wireFrame);
  BrainVisAtt->SetLineWidth(0.7* mm);
  logicBrain->SetVisAttributes(BrainVisAtt);

  // Testing Brain Volume
  G4double BrainVol = logicBrain->GetSolid()->GetCubicVolume();
  G4cout << "Volume of Brain = " << BrainVol/cm3 << " cm^3" << G4endl;
  
  // Testing Brain Material
  G4String BrainMat = logicBrain->GetMaterial()->GetName();
  G4cout << "Material of Brain = " << BrainMat << G4endl;
  
  // Testing Density
  G4double BrainDensity = logicBrain->GetMaterial()->GetDensity();
  G4cout << "Density of Material = " << BrainDensity*cm3/g << " g/cm^3" << G4endl;

  // Testing Mass
  G4double BrainMass = (BrainVol)*BrainDensity;
  G4cout << "Mass of Brain = " << BrainMass/gram << " g" << G4endl;

  
  return physBrain;
}