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// $Id: TiaraVisEventAction.cc,v 1.4 2006/06/29 15:45:52 gunter Exp $
// GEANT4 tag $Name:  $
//
// 

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#include "TiaraVisEventAction.hh"


#include "G4Event.hh"
#include "G4EventManager.hh"
#include "G4HCofThisEvent.hh"
#include "G4TrajectoryContainer.hh"
#include "G4Trajectory.hh"
#include "G4VVisManager.hh"
#include "G4SDManager.hh"
#include "G4UImanager.hh"
#include "G4ios.hh"
#include "G4UnitsTable.hh"
#include "G4Polyline.hh"
#include "G4Colour.hh"
#include "G4VisAttributes.hh"
#include "TiaraCellScorerStore.hh"

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TiaraVisEventAction::TiaraVisEventAction():
  fScorerStore(0)
{
}

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TiaraVisEventAction::~TiaraVisEventAction()
{
}

void TiaraVisEventAction::Clear() {
  
}



void TiaraVisEventAction::BeginOfEventAction(const G4Event* )
{
}

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void TiaraVisEventAction::
SetScorerStore(TiaraCellScorerStore *scorerStore){
  fScorerStore = scorerStore;
}

void TiaraVisEventAction::EndOfEventAction(const G4Event* evt)
{
  
  if (fScorerStore) {
    fScorerStore->EndOfEventAction();
  }

  if (G4VVisManager::GetConcreteInstance()) {
    G4TrajectoryContainer* trajectoryContainer(0);
    trajectoryContainer = evt->GetTrajectoryContainer();
    G4int n_trajectories = 0;
    if (trajectoryContainer) {
      n_trajectories = trajectoryContainer->entries();
    }

    for (G4int i=0; i<n_trajectories; i++)  { 

      G4Trajectory* trj = 0;
      trj = dynamic_cast<G4Trajectory*>((*trajectoryContainer)[i]);
      if (trj) {
	G4bool charged(false);
	charged = std::fabs(trj->GetCharge()) > 0;
	DrawTrajectory(*trj);
      }
      else {
	G4cerr << " TiaraVisEventAction::EndOfEventAction: failed to dynamic cast to G4Trajectory!" << G4endl;
      }
    }
  }
}  

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///////////////////////////////////////////////
void TiaraVisEventAction::DrawTrajectory(G4Trajectory &trj) const
///////////////////////////////////////////////
{

   G4VVisManager* pVVisManager = G4VVisManager::GetConcreteInstance();
   G4ThreeVector pos;

   G4ParticleDefinition* pdf = trj.GetParticleDefinition();
   G4String ParticleName(pdf->GetParticleName());
   G4double PDGCharge(pdf->GetPDGCharge());


   G4Polyline pPolyline;
   for (int i = 0; i < trj.GetPointEntries() ; i++) {
     G4VTrajectoryPoint* trjPoint = trj.GetPoint(i);
       pos = trjPoint->GetPosition();
     pPolyline.push_back( pos );
   }
   
   G4Colour colour;
   if (ParticleName == "proton") {
     colour = G4Colour(1,0,1); // magenta
     }
   else if (ParticleName == "neutron") {
     colour = G4Colour(0,1,1); // cyan
   }
   else if (ParticleName == "gamma") {
     colour = G4Colour(1,1,0); // yellow
   }
   else {
     if(PDGCharge<0.) 
       colour = G4Colour(1.,0.,0.); // red
     else if(PDGCharge>0.) 
       colour = G4Colour(0.,0.,1.); // blue
     else 
       colour = G4Colour(0.,1.,0.); // green
   }
   G4VisAttributes attribs(colour);
   pPolyline.SetVisAttributes(attribs);
   if(pVVisManager) {
     pVVisManager->Draw(pPolyline);
   }
}