//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
#include "LXeTrajectory.hh"
#include "G4TrajectoryPoint.hh"
#include "G4Trajectory.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleTypes.hh"
#include "G4ThreeVector.hh"
#include "G4Polyline.hh"
#include "G4Circle.hh"
#include "G4Colour.hh"
#include "G4VisAttributes.hh"
#include "G4VVisManager.hh"
#include "G4Polymarker.hh"

G4Allocator<LXeTrajectory> LXeTrajectoryAllocator;

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
LXeTrajectory::LXeTrajectory()
  :G4Trajectory(),wls(false),drawit(false),forceNoDraw(false),forceDraw(false)
{
  particleDefinition=0;
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
LXeTrajectory::LXeTrajectory(const G4Track* aTrack)
  :G4Trajectory(aTrack),wls(false),drawit(false)
{
  particleDefinition=aTrack->GetDefinition();
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
LXeTrajectory::LXeTrajectory(LXeTrajectory &right)
  :G4Trajectory(right),wls(right.wls),drawit(right.drawit)
{
  particleDefinition=right.particleDefinition;
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
LXeTrajectory::~LXeTrajectory()
{

}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
void LXeTrajectory::DrawTrajectory() const
{
  // Invoke the default implementation in G4VTrajectory...
  G4VTrajectory::DrawTrajectory();
  // ... or override with your own code here.
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
void LXeTrajectory::DrawTrajectory(G4int i_mode) const{
  //Taken from G4VTrajectory and modified to select colours based on particle
  //type and to selectively eliminate drawing of certain trajectories.

  if(!forceDraw && (!drawit || forceNoDraw))
    return;
 
  // If i_mode>=0, draws a trajectory as a polyline and, if i_mode!=0,
  // adds markers - yellow circles for step points and magenta squares
  // for auxiliary points, if any - whose screen size in pixels is
  // given by std::abs(i_mode)/1000.  E.g: i_mode = 5000 gives easily
  // visible markers.
  
  G4VVisManager* pVVisManager = G4VVisManager::GetConcreteInstance();
  if (!pVVisManager) return;
 
  const G4double markerSize = std::abs(i_mode)/1000;
  G4bool lineRequired (i_mode >= 0);
  G4bool markersRequired (markerSize > 0.);
  
  G4Polyline trajectoryLine;
  G4Polymarker stepPoints;
  G4Polymarker auxiliaryPoints;
  
  for (G4int i = 0; i < GetPointEntries() ; i++) {
    G4VTrajectoryPoint* aTrajectoryPoint = GetPoint(i);
    const std::vector<G4ThreeVector>* auxiliaries
      = aTrajectoryPoint->GetAuxiliaryPoints();
    if (auxiliaries) {
      for (size_t iAux = 0; iAux < auxiliaries->size(); ++iAux) {
	const G4ThreeVector pos((*auxiliaries)[iAux]);
	if (lineRequired) {
	  trajectoryLine.push_back(pos);
	}
	if (markersRequired) {
	  auxiliaryPoints.push_back(pos);
	}
      }
    }
    const G4ThreeVector pos(aTrajectoryPoint->GetPosition());
    if (lineRequired) {
      trajectoryLine.push_back(pos);
    }
    if (markersRequired) {
      stepPoints.push_back(pos);
    }
  }
  
  if (lineRequired) {
    G4Colour colour;
    
    if(particleDefinition==G4OpticalPhoton::OpticalPhotonDefinition()){ 
      if(wls) //WLS photons are red
	colour = G4Colour(1.,0.,0.);
      else{ //Scintillation and Cerenkov photons are green
	colour = G4Colour(0.,1.,0.);
      }
    }
    else //All other particles are blue
      colour = G4Colour(0.,0.,1.);
    
    G4VisAttributes trajectoryLineAttribs(colour);
    trajectoryLine.SetVisAttributes(&trajectoryLineAttribs);
    pVVisManager->Draw(trajectoryLine);
  }
  if (markersRequired) {
    auxiliaryPoints.SetMarkerType(G4Polymarker::squares);
    auxiliaryPoints.SetScreenSize(markerSize);
    auxiliaryPoints.SetFillStyle(G4VMarker::filled);
    G4VisAttributes auxiliaryPointsAttribs(G4Colour(0.,1.,1.));  // Magenta
    auxiliaryPoints.SetVisAttributes(&auxiliaryPointsAttribs);
    pVVisManager->Draw(auxiliaryPoints);
    
    stepPoints.SetMarkerType(G4Polymarker::circles);
    stepPoints.SetScreenSize(markerSize);
    stepPoints.SetFillStyle(G4VMarker::filled);
    G4VisAttributes stepPointsAttribs(G4Colour(1.,1.,0.));  // Yellow.
    stepPoints.SetVisAttributes(&stepPointsAttribs);
    pVVisManager->Draw(stepPoints);
  }
}