G4TrajectoryDrawerUtils.cc

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//
// Jane Tinslay, John Allison, Joseph Perl November 2005
//
#include "G4TrajectoryDrawerUtils.hh"
#include "G4Colour.hh"
#include "G4Polyline.hh"
#include "G4Polymarker.hh"
#include "G4VTrajectory.hh"
#include "G4VTrajectoryPoint.hh"
#include "G4VisAttributes.hh"
#include "G4VisTrajContext.hh"
#include "G4VVisManager.hh"
#include "G4UIcommand.hh"
#include "G4AttValue.hh"

namespace G4TrajectoryDrawerUtils {

  enum TimesValidity {InvalidTimes, ValidTimes};

  TimesValidity GetPointsAndTimes
  (const G4VTrajectory& traj,
   const G4VisTrajContext& context,
   G4Polyline& trajectoryLine,
   G4Polymarker& auxiliaryPoints,
   G4Polymarker& stepPoints,
   std::vector<G4double>& trajectoryLineTimes,
   std::vector<G4double>& auxiliaryPointTimes,
   std::vector<G4double>& stepPointTimes)
  {
    TimesValidity validity = InvalidTimes;
    if (context.GetTimeSliceInterval()) validity = ValidTimes;

    // Memory for last trajectory point position for auxiliary point
    // time interpolation algorithm.  There are no auxiliary points
    // for the first trajectory point, so its initial value is
    // immaterial.
    G4ThreeVector lastTrajectoryPointPosition;

    // Keep positions.  Don't store unless first or different.
    std::vector<G4ThreeVector> positions;

    for (G4int iPoint=0; iPoint<traj.GetPointEntries(); iPoint++) {

      G4VTrajectoryPoint* aTrajectoryPoint = traj.GetPoint(iPoint);
      const G4ThreeVector& trajectoryPointPosition =
  aTrajectoryPoint->GetPosition();

      // Only store if first or if different
      if (positions.size() == 0 ||
    trajectoryPointPosition != positions[positions.size()-1]) {

  // Pre- and Post-Point times from the trajectory point...
  G4double trajectoryPointPreTime = -std::numeric_limits<double>::max();
  G4double trajectoryPointPostTime = std::numeric_limits<double>::max();

  if (context.GetTimeSliceInterval() && validity == ValidTimes) {

    std::vector<G4AttValue>* trajectoryPointAttValues =
      aTrajectoryPoint->CreateAttValues();
    if (!trajectoryPointAttValues) {
      static G4bool warnedNoAttValues = false;
      if (!warnedNoAttValues) {
        G4cout <<
  "*************************************************************************"
  "\n*  WARNING: G4TrajectoryDrawerUtils::GetPointsAndTimes: no att values."
  "\n*************************************************************************"
         << G4endl;
        warnedNoAttValues = true;
      }
      validity = InvalidTimes;
    } else {
      G4bool foundPreTime = false, foundPostTime = false;
      for (std::vector<G4AttValue>::iterator i =
       trajectoryPointAttValues->begin();
     i != trajectoryPointAttValues->end(); ++i) {
        if (i->GetName() == "PreT") {
    trajectoryPointPreTime =
      G4UIcommand::ConvertToDimensionedDouble(i->GetValue());
    foundPreTime = true;
        }
        if (i->GetName() == "PostT") {
    trajectoryPointPostTime =
      G4UIcommand::ConvertToDimensionedDouble(i->GetValue());
    foundPostTime = true;
        }
      }
      if (!foundPreTime || !foundPostTime) {
        static G4bool warnedTimesNotFound = false;
        if (!warnedTimesNotFound) {
    G4cout <<
  "*************************************************************************"
  "\n*  WARNING: G4TrajectoryDrawerUtils::GetPointsAndTimes: times not found."
  "\n You need to specify \"/vis/scene/add/trajectories rich\""
  "\n*************************************************************************"
           << G4endl;
    warnedTimesNotFound = true;
        }
        validity = InvalidTimes;
      }
    }
          delete trajectoryPointAttValues;  // (Must be deleted after use.)
  }

  const std::vector<G4ThreeVector>* auxiliaries
    = aTrajectoryPoint->GetAuxiliaryPoints();
  if (0 != auxiliaries) {
    for (size_t iAux=0; iAux<auxiliaries->size(); ++iAux) {
      const G4ThreeVector& auxPointPosition = (*auxiliaries)[iAux];
      if (positions.size() == 0 ||
    auxPointPosition != positions[positions.size()-1]) {
        // Only store if first or if different
        positions.push_back(trajectoryPointPosition);
        trajectoryLine.push_back(auxPointPosition);
        auxiliaryPoints.push_back(auxPointPosition);
        if (validity == ValidTimes) {
    // Interpolate time for auxiliary points...
    G4double s1 =
      (auxPointPosition - lastTrajectoryPointPosition).mag();
    G4double s2 =
      (trajectoryPointPosition - auxPointPosition).mag();
    G4double t = trajectoryPointPreTime +
      (trajectoryPointPostTime - trajectoryPointPreTime) *
      (s1 / (s1 + s2));
    trajectoryLineTimes.push_back(t);
    auxiliaryPointTimes.push_back(t);
        }
      }
    }
  }

  positions.push_back(trajectoryPointPosition);
  trajectoryLine.push_back(trajectoryPointPosition);
  stepPoints.push_back(trajectoryPointPosition);
  if (validity == ValidTimes) {
    trajectoryLineTimes.push_back(trajectoryPointPostTime);
    stepPointTimes.push_back(trajectoryPointPostTime);
  }
        lastTrajectoryPointPosition = trajectoryPointPosition;
      }
    }
    return validity;    
  }

  static void SliceLine(G4double timeIncrement,
      G4Polyline& trajectoryLine,
      std::vector<G4double>& trajectoryLineTimes)
  {
    // Assumes valid arguments from GetPoints and GetTimes.

    G4Polyline newTrajectoryLine;
    std::vector<G4double> newTrajectoryLineTimes;

    newTrajectoryLine.push_back(trajectoryLine[0]);
    newTrajectoryLineTimes.push_back(trajectoryLineTimes[0]);
    size_t lineSize = trajectoryLine.size();
    if (lineSize > 1) {
      for (size_t i = 1; i < trajectoryLine.size(); ++i) {
  G4double deltaT = trajectoryLineTimes[i] - trajectoryLineTimes[i - 1];
  if (deltaT > 0.) {
    G4double practicalTimeIncrement = 
      std::max(timeIncrement, deltaT / 100.);
    for (G4double t =
     (int(trajectoryLineTimes[i - 1]/practicalTimeIncrement) + 1) *
     practicalTimeIncrement;
         t <= trajectoryLineTimes[i];
         t += practicalTimeIncrement) {
      G4ThreeVector pos = trajectoryLine[i - 1] +
        (trajectoryLine[i] - trajectoryLine[i - 1]) *
        ((t - trajectoryLineTimes[i - 1]) / deltaT);
      newTrajectoryLine.push_back(pos);
      newTrajectoryLineTimes.push_back(t);
    }
  }
  newTrajectoryLine.push_back(trajectoryLine[i]);
  newTrajectoryLineTimes.push_back(trajectoryLineTimes[i]);
      }
    }

    trajectoryLine = newTrajectoryLine;
    trajectoryLineTimes = newTrajectoryLineTimes;
  }

  static void DrawWithoutTime(const G4VisTrajContext& myContext,
            G4Polyline& trajectoryLine,
            G4Polymarker& auxiliaryPoints,
            G4Polymarker& stepPoints)
  {
    // Draw without time slice information

    G4VVisManager* pVVisManager = G4VVisManager::GetConcreteInstance();
    if (0 == pVVisManager) return;
    
    if (myContext.GetDrawLine() && myContext.GetLineVisible()) {
      G4VisAttributes trajectoryLineAttribs(myContext.GetLineColour());
      trajectoryLineAttribs.SetLineWidth(myContext.GetLineWidth());
      trajectoryLine.SetVisAttributes(&trajectoryLineAttribs);

      pVVisManager->Draw(trajectoryLine);
    }
  
    if (myContext.GetDrawAuxPts() && myContext.GetAuxPtsVisible()
        && (auxiliaryPoints.size() > 0)) {
      auxiliaryPoints.SetMarkerType(myContext.GetAuxPtsType());
      auxiliaryPoints.SetSize(myContext.GetAuxPtsSizeType(), myContext.GetAuxPtsSize());
      auxiliaryPoints.SetFillStyle(myContext.GetAuxPtsFillStyle());

      G4VisAttributes auxiliaryPointsAttribs(myContext.GetAuxPtsColour());  
      auxiliaryPoints.SetVisAttributes(&auxiliaryPointsAttribs);

      pVVisManager->Draw(auxiliaryPoints);
    }
  
    if (myContext.GetDrawStepPts() && myContext.GetStepPtsVisible()
        && (stepPoints.size() > 0)) {
      stepPoints.SetMarkerType(myContext.GetStepPtsType());
      stepPoints.SetSize(myContext.GetStepPtsSizeType(), myContext.GetStepPtsSize());
      stepPoints.SetFillStyle(myContext.GetStepPtsFillStyle());

      G4VisAttributes stepPointsAttribs(myContext.GetStepPtsColour()); 
      stepPoints.SetVisAttributes(&stepPointsAttribs);

      pVVisManager->Draw(stepPoints);
    }
  }

  static void DrawWithTime(const G4VisTrajContext& myContext,
         G4Polyline& trajectoryLine,
         G4Polymarker& auxiliaryPoints,
         G4Polymarker& stepPoints,
         std::vector<G4double>& trajectoryLineTimes,
         std::vector<G4double>& auxiliaryPointTimes,
         std::vector<G4double>& stepPointTimes)
  {
    // Draw with time slice information

    G4VVisManager* pVVisManager = G4VVisManager::GetConcreteInstance();
    if (0 == pVVisManager) return;

    if (myContext.GetDrawLine() && myContext.GetLineVisible()) {
      G4VisAttributes trajectoryLineAttribs(myContext.GetLineColour());
      trajectoryLineAttribs.SetLineWidth(myContext.GetLineWidth());

      for (size_t i = 1; i < trajectoryLine.size(); ++i ) {
  G4Polyline slice;
  slice.push_back(trajectoryLine[i -1]);
  slice.push_back(trajectoryLine[i]);
  trajectoryLineAttribs.SetStartTime(trajectoryLineTimes[i - 1]);
  trajectoryLineAttribs.SetEndTime(trajectoryLineTimes[i]);
  slice.SetVisAttributes(&trajectoryLineAttribs);
  pVVisManager->Draw(slice);
      }
    }

    if (myContext.GetDrawAuxPts() && myContext.GetAuxPtsVisible()
        && (auxiliaryPoints.size() > 0)) {
      G4VisAttributes auxiliaryPointsAttribs(myContext.GetAuxPtsColour());  

      for (size_t i = 0; i < auxiliaryPoints.size(); ++i ) {
  G4Polymarker point;
  point.push_back(auxiliaryPoints[i]);
  point.SetMarkerType(myContext.GetAuxPtsType());
  point.SetSize(myContext.GetAuxPtsSizeType(), myContext.GetAuxPtsSize());
  point.SetFillStyle(myContext.GetAuxPtsFillStyle());
  auxiliaryPointsAttribs.SetStartTime(auxiliaryPointTimes[i]);
  auxiliaryPointsAttribs.SetEndTime(auxiliaryPointTimes[i]);
  point.SetVisAttributes(&auxiliaryPointsAttribs);
  pVVisManager->Draw(point);
      }
    }

    if (myContext.GetDrawStepPts() && myContext.GetStepPtsVisible()
        && (stepPoints.size() > 0)) {
      G4VisAttributes stepPointsAttribs(myContext.GetStepPtsColour()); 

      for (size_t i = 0; i < stepPoints.size(); ++i ) {
  G4Polymarker point;
  point.push_back(stepPoints[i]);
  point.SetMarkerType(myContext.GetStepPtsType());
  point.SetSize(myContext.GetStepPtsSizeType(), myContext.GetStepPtsSize());
  point.SetFillStyle(myContext.GetStepPtsFillStyle());
  stepPointsAttribs.SetStartTime(stepPointTimes[i]);
  stepPointsAttribs.SetEndTime(stepPointTimes[i]);
  point.SetVisAttributes(&stepPointsAttribs);
  pVVisManager->Draw(point);
      }
    }
  }

  void DrawLineAndPoints(const G4VTrajectory& traj, const G4VisTrajContext& context) 
  {
    // Return if don't need to do anything
    if (!context.GetDrawLine() && !context.GetDrawAuxPts() && !context.GetDrawStepPts()) return;
    
    // Get points and times (times are returned only if time-slicing
    // is requested).
    G4Polyline trajectoryLine;
    G4Polymarker stepPoints;
    G4Polymarker auxiliaryPoints;
    std::vector<G4double> trajectoryLineTimes;
    std::vector<G4double> stepPointTimes;
    std::vector<G4double> auxiliaryPointTimes;

    TimesValidity validity = GetPointsAndTimes
      (traj, context,
       trajectoryLine, auxiliaryPoints, stepPoints,
       trajectoryLineTimes, auxiliaryPointTimes, stepPointTimes);
    
    if (validity == ValidTimes) {

      SliceLine(context.GetTimeSliceInterval(),
    trajectoryLine, trajectoryLineTimes);

      DrawWithTime(context,
       trajectoryLine, auxiliaryPoints, stepPoints,
       trajectoryLineTimes, auxiliaryPointTimes, stepPointTimes);

    } else {

      DrawWithoutTime(context, trajectoryLine, auxiliaryPoints, stepPoints);

    }
  }
}