/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkEnSight6Reader.cxx,v $

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkEnSight6Reader.h"

#include "vtkCellData.h"
#include "vtkCharArray.h"
#include "vtkFloatArray.h"
#include "vtkIdList.h"
#include "vtkIdTypeArray.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
#include "vtkRectilinearGrid.h"
#include "vtkStructuredGrid.h"
#include "vtkStructuredPoints.h"
#include "vtkUnstructuredGrid.h"


#include <assert.h>
#include <ctype.h>
#include <vtkstd/string>

vtkCxxRevisionMacro(vtkEnSight6Reader, "$Revision: 1.57 $");
vtkStandardNewMacro(vtkEnSight6Reader);

//----------------------------------------------------------------------------
vtkEnSight6Reader::vtkEnSight6Reader()
{
  this->NumberOfUnstructuredPoints = 0;
  this->UnstructuredPoints = vtkPoints::New();
  this->UnstructuredNodeIds = NULL;
}

//----------------------------------------------------------------------------
vtkEnSight6Reader::~vtkEnSight6Reader()
{
  if (this->UnstructuredNodeIds)
    {
    this->UnstructuredNodeIds->Delete();
    this->UnstructuredNodeIds = NULL;
    }
  this->UnstructuredPoints->Delete();
  this->UnstructuredPoints = NULL;
}

//----------------------------------------------------------------------------
int vtkEnSight6ReaderRead1(const char *line, const char *, int *pointId,
                           float *point1, float *point2, float *point3)
{
  int numEntries;
#ifdef __CYGWIN__  
  // most cygwins are busted in sscanf, this is a work around
  numEntries = 0;
  char *dup = strdup(line);
  dup[8] = '\0';
  numEntries += sscanf(dup,"%8d",pointId);
  dup[8] = line[8];
  dup[20] = '\0';
  numEntries += sscanf(dup+8,"%12e",point1);
  dup[20] = line[20];
  dup[32] = '\0';
  numEntries += sscanf(dup+20,"%12e",point2);
  dup[32] = line[32];
  numEntries += sscanf(dup+32,"%12e",point3);  
  free(dup);
#else
  numEntries = sscanf(line, " %8d %12e %12e %12e", pointId, point1, point2, point3);
#endif
  return numEntries;
}

int vtkEnSight6ReaderRead2(const char *line, const char *,
                           float *point1, float *point2, float *point3)
{
  int numEntries;
#ifdef __CYGWIN__  
  // most cygwins are busted in sscanf, this is a work around
  numEntries = 0;
  char *dup = strdup(line);
  dup[12] = '\0';
  numEntries += sscanf(dup,"%12e",point1);
  dup[12] = line[12];
  dup[24] = '\0';
  numEntries += sscanf(dup+12,"%12e",point2);
  dup[24] = line[24];
  numEntries += sscanf(dup+24,"%12e",point3);  
  free(dup);
#else
  numEntries = sscanf(line, " %12e %12e %12e", point1, point2, point3);
#endif
  return numEntries;
}

int vtkEnSight6ReaderRead3(const char *line, const char *,
                           float *point1, float *point2, float *point3,
                           float *point4, float *point5, float *point6)
{
  int numEntries;
#ifdef __CYGWIN__  
  // most cygwins are busted in sscanf, this is a work around
  numEntries = 0;
  char *dup = strdup(line);
  dup[12] = '\0';
  numEntries += sscanf(dup,"%12e",point1);
  dup[12] = line[12];
  dup[24] = '\0';
  numEntries += sscanf(dup+12,"%12e",point2);
  dup[24] = line[24];
  dup[36] = '\0';
  numEntries += sscanf(dup+24,"%12e",point3);  
  dup[36] = line[36];
  dup[48] = '\0';
  numEntries += sscanf(dup+36,"%12e",point4);  
  dup[48] = line[48];
  dup[60] = '\0';
  numEntries += sscanf(dup+48,"%12e",point5);  
  dup[60] = line[60];
  numEntries += sscanf(dup+60,"%12e",point6);  
  free(dup);
#else
  numEntries = sscanf(line, " %12e %12e %12e %12e %12e %12e", 
         point1, point2, point3, point4, point5, point6);
#endif
  return numEntries;
}

int vtkEnSight6ReaderRead4(const char *line, float *point1)
{
  int numEntries;
#ifdef __CYGWIN__  
  // most cygwins are busted in sscanf, this is a work around
  numEntries = 0;
  char *dup = strdup(line);
  dup[12] = '\0';
  numEntries += sscanf(dup,"%12e",point1);
  free(dup);
#else
  numEntries = sscanf(line,"%12e",point1);
#endif
  return numEntries;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadGeometryFile(const char* fileName, int timeStep)
{
  char line[256], subLine[256];
  int partId;
  int lineRead;
  int pointId;
  float point[3];
  int i, j;
  int pointIdsListed;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("A GeometryFileName must be specified in the case file.");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to geometry file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }
  
  this->ReadLine(line);
  
  if (sscanf(line, " %*s %s", subLine) == 1)
    {
    if (strcmp(subLine, "Binary") == 0)
      {
      vtkErrorMacro("This is a binary data set. Try "
                    << "vtkEnSight6BinaryReader.");
      return 0;
      }
    }
  
  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line);
      }
    
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadNextDataLine(line);
      }
    this->ReadLine(line);
    }
  
  // Skip description line.  Using ReadLine instead of
  // ReadNextDataLine because the description line could be blank.
  this->ReadLine(line);
  
  // Read the node id and element id lines.
  this->ReadLine(line);
  sscanf(line, " %*s %*s %s", subLine);
  if (strcmp(subLine, "given") == 0)
    {
    this->UnstructuredNodeIds = vtkIdTypeArray::New();
    pointIdsListed = 1;
    }
  else if (strcmp(subLine, "ignore") == 0)
    {
    pointIdsListed = 1;
    }
  else
    {
    pointIdsListed = 0;
    }
  
  this->ReadNextDataLine(line);
  
  this->ReadNextDataLine(line); // "coordinates"
  this->ReadNextDataLine(line);
  this->NumberOfUnstructuredPoints = atoi(line);
  this->UnstructuredPoints->Allocate(this->NumberOfUnstructuredPoints);
  int *tmpIds = new int[this->NumberOfUnstructuredPoints];

  int maxId = 0;
  int entries;
  for (j = 0; j < this->NumberOfUnstructuredPoints; j++)
    {
    this->ReadNextDataLine(line);
    if (pointIdsListed)
      {
      // point ids listed
      entries = vtkEnSight6ReaderRead1(line, " %8d %12e %12e %12e", 
                                       &pointId, &point[0],
                                       &point[1], &point[2]);
      assert( entries == 4 );
      if (this->UnstructuredNodeIds)
        {
        tmpIds[j] = pointId;
        if (pointId > maxId)
          {
          maxId = pointId;
          }
        }
      this->UnstructuredPoints->InsertNextPoint(point);
      }
    else
      {
      entries = vtkEnSight6ReaderRead2(line, "%12e%12e%12e", 
                                       &point[0], &point[1], &point[2]);
      assert( entries == 3 );
      this->UnstructuredPoints->InsertNextPoint(point);
      }
    }
  
  if (this->UnstructuredNodeIds)
    {
    this->UnstructuredNodeIds->SetNumberOfComponents(1);
    this->UnstructuredNodeIds->SetNumberOfTuples(maxId);
    this->UnstructuredNodeIds->FillComponent(0, -1);
    
    for (j = 0; j < this->NumberOfUnstructuredPoints; j++)
      {
      this->UnstructuredNodeIds->InsertValue(tmpIds[j]-1, j);
      }
    }
  delete [] tmpIds;
  
  lineRead = this->ReadNextDataLine(line); // "part"
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    this->NumberOfGeometryParts++;
    sscanf(line, " part %d", &partId);
    partId--; // EnSight starts #ing at 1.
    int realId = this->InsertNewPartId(partId);

    this->ReadLine(line); // part description line
    char *name = strdup(line);
    this->ReadNextDataLine(line);
    
    if (strncmp(line, "block", 5) == 0)
      {
      lineRead = this->CreateStructuredGridOutput(realId, line, name);
      }
    else
      {
      lineRead = this->CreateUnstructuredGridOutput(realId, line, name);
      }
    free(name);
    }
  
  delete this->IS;
  this->IS = NULL;
  if (this->UnstructuredNodeIds)
    {
      this->UnstructuredNodeIds->Delete();
      this->UnstructuredNodeIds = NULL;
    }

  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadMeasuredGeometryFile(const char* fileName, int timeStep)
{
  char line[256], subLine[256];
  vtkPoints *newPoints;
  int i;
  vtkIdType id;
  int tempId;
  float coords[3];
 
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("A MeasuredFileName must be specified in the case file.");
    return 0;
    }

  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to measured geometry file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }
  

  this->ReadLine(line);
  
  if (sscanf(line, " %*s %s", subLine) == 1)
    {
    if (strcmp(subLine, "Binary") == 0)
      {
      vtkErrorMacro("This is a binary data set. Try "
                    << "vtkEnSight6BinaryReader.");
      return 0;
      }
    }
  
  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line);
      }
    
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    this->ReadLine(line);
    }
  
  this->ReadLine(line); // "particle coordinates"
  this->ReadLine(line);
  this->NumberOfMeasuredPoints = atoi(line);
  
  this->NumberOfNewOutputs++;
  
  if (this->GetOutput(this->NumberOfGeometryParts) == NULL)
    {
    vtkDebugMacro("creating new measured geometry output");
    vtkPolyData* pd = vtkPolyData::New();
    this->SetNthOutput(this->NumberOfGeometryParts, pd);
    pd->Delete();
    }
  else if ( ! this->GetOutput(this->NumberOfGeometryParts)->IsA("vtkPolyData"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }
  
  vtkPolyData *pd = vtkPolyData::SafeDownCast( 
      this->GetOutput( this->NumberOfGeometryParts) );
  pd->Allocate(this->NumberOfMeasuredPoints);
    
  newPoints = vtkPoints::New();
  newPoints->Allocate(this->NumberOfMeasuredPoints);
    
  for (i = 0; i < this->NumberOfMeasuredPoints; i++)
    {
    this->ReadLine(line);
#ifdef NDEBUG
    vtkEnSight6ReaderRead1(line, " %8d %12e %12e %12e", 
                           &tempId, &coords[0],
                           &coords[1], &coords[2]);
#else
    int entries = vtkEnSight6ReaderRead1(line, " %8d %12e %12e %12e", 
                                         &tempId, &coords[0],
                                         &coords[1], &coords[2]);
    assert( entries == 4 );
#endif
    id = tempId;
    newPoints->InsertNextPoint(coords);
    pd->InsertNextCell(VTK_VERTEX, 1, &id);
    }
  
  pd->SetPoints( newPoints );
  
  newPoints->Delete();
  
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadScalarsPerNode(const char* fileName,
                                          const char* description,
                                          int timeStep, int measured,
                                          int numberOfComponents,
                                          int component)
{
  char line[256];
  char tempLine[256];
  int partId, numPts, i, j;
  vtkFloatArray *scalars;
  int numLines, moreScalars;
  float scalarsRead[6];
  vtkDataSet *output;
  int entries;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL ScalarPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to scalar per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadLine(line); // skip the description line

  this->ReadNextDataLine(line); // 1st data line or part #
  if (strncmp(line, "part", 4) != 0)
    {
    int allocatedScalars = 0;
    // There are 6 values per line, and one scalar per point.
    if (!measured)
      {
      numPts = this->UnstructuredPoints->GetNumberOfPoints();
      }
    else
      {
      numPts = this->GetOutput(this->NumberOfGeometryParts)->
        GetNumberOfPoints();
      }
    numLines = numPts / 6;
    moreScalars = numPts % 6;
    if (component == 0)
      {
      scalars = vtkFloatArray::New();
      scalars->SetNumberOfTuples(numPts);
      scalars->SetNumberOfComponents(numberOfComponents);
      scalars->Allocate(numPts * numberOfComponents);
      allocatedScalars = 1;
      }
    else
      {
      // It does not matter which unstructured part we get the point data from
      // because it is the same for all of them.
      partId = this->UnstructuredPartIds->GetId(0);
      scalars = static_cast<vtkFloatArray*>(this->GetOutput(partId)->
                  GetPointData()->GetArray(description));
      }
    for (i = 0; i < numLines; i++)
      {
      entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e",
                                       &scalarsRead[0], &scalarsRead[1],
                                       &scalarsRead[2], &scalarsRead[3],
                                       &scalarsRead[4], &scalarsRead[5]);
      assert( entries == 6 );                                       
      for (j = 0; j < 6; j++)
        {
        scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);        
        }
      this->ReadNextDataLine(line);
      }
    strcpy(tempLine, "");
    for (j = 0; j < moreScalars; j++)
      {
      entries = vtkEnSight6ReaderRead4(line+j*12,&scalarsRead[j]);
      assert( entries == 1 );
      scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);
      }
    if (moreScalars != 0)
      {
      this->ReadLine(line);
      }
    if (!measured)
      {
      for (i = 0; i < this->UnstructuredPartIds->GetNumberOfIds(); i++)
        {
        partId = this->UnstructuredPartIds->GetId(i);
        output = this->GetOutput(partId);
        if (component == 0)
          {
          scalars->SetName(description);
          output->GetPointData()->AddArray(scalars);
          if (!output->GetPointData()->GetScalars())
            {
            output->GetPointData()->SetScalars(scalars);
            }
          }
        else
          {
          output->GetPointData()->AddArray(scalars);
          }
        }
      }
    else
      {
      scalars->SetName(description);
      output = this->GetOutput(this->NumberOfGeometryParts);
      output->GetPointData()->AddArray(scalars);
      if (!output->GetPointData()->GetScalars())
        {
        output->GetPointData()->SetScalars(scalars);
        }
      }
    if(allocatedScalars)
      {
      scalars->Delete();
      }
    }  

  // scalars for structured parts
  while (strncmp(line, "part", 4) == 0)
    {
    int allocatedScalars = 0;
    sscanf(line, " part %d", &partId);
    partId--;  // EnSight starts #ing at 1.
    int realId = this->InsertNewPartId(partId);

    output = this->GetOutput(realId);
    this->ReadNextDataLine(line); // block
    numPts = output->GetNumberOfPoints();
    numLines = numPts / 6;
    moreScalars = numPts % 6;
    if (component == 0)
      {
      scalars = vtkFloatArray::New();
      scalars->SetNumberOfTuples(numPts);
      scalars->SetNumberOfComponents(numberOfComponents);
      scalars->Allocate(numPts * numberOfComponents);
      allocatedScalars = 1;
      }
    else
      {
      scalars = (vtkFloatArray*)(output->GetPointData()->
                                 GetArray(description)); 
      }
    for (i = 0; i < numLines; i++)
      {
      this->ReadNextDataLine(line);
      entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &scalarsRead[0],
             &scalarsRead[1], &scalarsRead[2], &scalarsRead[3],
             &scalarsRead[4], &scalarsRead[5]);
      assert( entries == 6 );
      for (j = 0; j < 6; j++)
        {
        scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);        
        }
      }
    this->ReadNextDataLine(line);
    strcpy(tempLine, "");
    for (j = 0; j < moreScalars; j++)
      {
      entries = vtkEnSight6ReaderRead4(line+j*12,&scalarsRead[j]);
      assert( entries == 1 );
      scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);
      }
    if (component == 0)
      {
      scalars->SetName(description);
      output->GetPointData()->AddArray(scalars);
      if (!output->GetPointData()->GetScalars())
        {
        output->GetPointData()->SetScalars(scalars);
        }
      }
    else
      {
      output->GetPointData()->AddArray(scalars);
      }
    this->ReadNextDataLine(line);
    if(allocatedScalars)
      {
      scalars->Delete();
      }
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadVectorsPerNode(const char* fileName,
                                          const char* description,
                                          int timeStep, int measured)
{
  char line[256];
  char tempLine[256];
  int partId, numPts, i, j, k;
  vtkFloatArray *vectors;
  int numLines, moreVectors;
  float vector1[3], vector2[3], values[6];
  vtkDataSet *output;
  int entries;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL VectorPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to vector per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadLine(line); // skip the description line

  this->ReadNextDataLine(line); // 1st data line or part #
  if (strncmp(line, "part", 4) != 0)
    {
    // There are 6 values per line, and 3 values (or 1 vector) per point.
    if (!measured)
      {
      numPts = this->UnstructuredPoints->GetNumberOfPoints();
      }
    else
      {
      numPts = this->GetOutput(this->NumberOfGeometryParts)->
        GetNumberOfPoints();
      }
    numLines = numPts / 2;
    moreVectors = ((numPts * 3) % 6) / 3;
    vectors = vtkFloatArray::New();
    vectors->SetNumberOfTuples(numPts);
    vectors->SetNumberOfComponents(3);
    vectors->Allocate(numPts*3);
    for (i = 0; i < numLines; i++)
      {
      entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e",
             &vector1[0], &vector1[1],
             &vector1[2], &vector2[0], 
             &vector2[1], &vector2[2]);
      assert( entries == 6 );
      vectors->InsertTuple(i*2, vector1);
      vectors->InsertTuple(i*2 + 1, vector2);
      this->ReadNextDataLine(line);
      }
    strcpy(tempLine, "");
    for (j = 0; j < moreVectors; j++)
      {
      entries = vtkEnSight6ReaderRead4(line+j*36,&vector1[0]);
      assert( entries == 1 );
      entries = vtkEnSight6ReaderRead4(line+j*36+12,&vector1[1]);
      assert( entries == 1 );
      entries = vtkEnSight6ReaderRead4(line+j*36+24,&vector1[2]);
      assert( entries == 1 );
      vectors->InsertTuple(i*2 + j, vector1);
      }
    if (moreVectors != 0)
      {
      this->ReadLine(line);
      }
    if (!measured)
      {
      for (i = 0; i < this->UnstructuredPartIds->GetNumberOfIds(); i++)
        {
        partId = this->UnstructuredPartIds->GetId(i);
        vectors->SetName(description);
        output = this->GetOutput(partId);
        output->GetPointData()->AddArray(vectors);
        if (!output->GetPointData()->GetVectors())
          {
          output->GetPointData()->SetVectors(vectors);
          }
        }
      }
    else
      {
      vectors->SetName(description);
      output = this->GetOutput(this->NumberOfGeometryParts);
      output->GetPointData()->AddArray(vectors);
      if (!output->GetPointData()->GetVectors())
        {
        output->GetPointData()->SetVectors(vectors);
        }
      }
    vectors->Delete();
    }

  // vectors for structured parts
  while (strncmp(line, "part", 4) == 0)
    {
    sscanf(line, " part %d", &partId);
    partId--;
    int realId = this->InsertNewPartId(partId);

    output = this->GetOutput(realId);
    numPts = output->GetNumberOfPoints();
    numLines = numPts / 6;
    moreVectors = numPts % 6;
    vectors = vtkFloatArray::New();
    vectors->SetNumberOfTuples(numPts);
    vectors->SetNumberOfComponents(3);
    vectors->Allocate(numPts*3);

    for (k = 0; k < 3; k++)
      {
      for (i = 0; i < numLines; i++)
        {
        this->ReadNextDataLine(line);
        entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &values[0], &values[1],
               &values[2], &values[3], &values[4], &values[5]);
        assert( entries == 6 );
        for (j = 0; j < 6; j++)
          {
          vectors->InsertComponent(i*6 + j, k, values[j]);
          }
        }
      
      if (moreVectors)
        {
        this->ReadNextDataLine(line);
        strcpy(tempLine, "");
        for (j = 0; j < moreVectors; j++)
          {
          entries = vtkEnSight6ReaderRead4(line+j*12,&values[j]);
          assert( entries == 1 );
          vectors->InsertComponent(i*6 + j, k, values[j]);
          }
        }
      }
    vectors->SetName(description);
    output->GetPointData()->AddArray(vectors);
    if (!output->GetPointData()->GetVectors())
      {
      output->GetPointData()->SetVectors(vectors);
      }
    vectors->Delete();
    
    this->ReadNextDataLine(line);
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadTensorsPerNode(const char* fileName,
                                          const char* description,
                                          int timeStep)
{
  char line[256];
  char tempLine[256];
  int partId, numPts, i, j, k;
  vtkFloatArray *tensors;
  int numLines, moreTensors;
  float tensor[6], values[6];
  int lineRead;
  vtkDataSet *output;
  int entries;

  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL TensorSymmPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to tensor symm per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadLine(line); // skip the description line

  lineRead = this->ReadNextDataLine(line); // 1st data line or part #
  if (strncmp(line, "part", 4) != 0)
    {
    // There are 6 values per line, and 6 values (or 1 tensor) per point.
    numPts = this->UnstructuredPoints->GetNumberOfPoints();
    numLines = numPts;
    tensors = vtkFloatArray::New();
    tensors->SetNumberOfTuples(numPts);
    tensors->SetNumberOfComponents(6);
    tensors->Allocate(numPts*6);
    for (i = 0; i < numLines; i++)
      {
      entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &tensor[0], &tensor[1],
             &tensor[2], &tensor[3], &tensor[4], &tensor[5]);
      assert( entries == 6 );
      tensors->InsertTuple(i, tensor);
      lineRead = this->ReadNextDataLine(line);
      }

    for (i = 0; i < this->UnstructuredPartIds->GetNumberOfIds(); i++)
      {
      partId = this->UnstructuredPartIds->GetId(i);
      tensors->SetName(description);
      this->GetOutput(partId)->GetPointData()->AddArray(tensors);
      }
    tensors->Delete();
    }

  // vectors for structured parts
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    sscanf(line, " part %d", &partId);
    partId--;
    int realId = this->InsertNewPartId(partId);
    this->ReadNextDataLine(line); // block
    output = this->GetOutput(realId);
    numPts = output->GetNumberOfPoints();
    numLines = numPts / 6;
    moreTensors = numPts % 6;
    tensors = vtkFloatArray::New();
    tensors->SetNumberOfTuples(numPts);
    tensors->SetNumberOfComponents(6);
    tensors->Allocate(numPts*6);

    for (k = 0; k < 6; k++)
      {
      for (i = 0; i < numLines; i++)
        {
        this->ReadNextDataLine(line);
        entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &values[0], &values[1],
               &values[2], &values[3], &values[4], &values[5]);
        assert( entries == 6 );
        for (j = 0; j < 6; j++)
          {
          tensors->InsertComponent(i*6 + j, k, values[j]);
          }
        }
      
      if (moreTensors)
        {
        this->ReadNextDataLine(line);
        strcpy(tempLine, "");
        for (j = 0; j < moreTensors; j++)
          {
          entries = vtkEnSight6ReaderRead4(line+j*12,&values[j]);
          assert( entries == 1 );
          tensors->InsertComponent(i*6 + j, k, values[j]);
          }
        }
      }
    tensors->SetName(description);
    output->GetPointData()->AddArray(tensors);
    tensors->Delete();
    lineRead = this->ReadNextDataLine(line);
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadScalarsPerElement(const char* fileName, 
                                             const char* description,
                                             int timeStep,
                                             int numberOfComponents,
                                             int component)
{
  char line[256];
  int partId, numCells, numCellsPerElement, i, j, idx;
  vtkFloatArray *scalars;
  int lineRead, elementType;
  float scalarsRead[6];
  int numLines, moreScalars;
  vtkDataSet *output;
  int entries;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL ScalarPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to scalars per element file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadLine(line); // skip the description line
  lineRead = this->ReadNextDataLine(line); // "part"
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    sscanf(line, " part %d", &partId);
    partId--; // EnSight starts #ing with 1.
    int realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numCells = output->GetNumberOfCells();
    this->ReadNextDataLine(line); // element type or "block"
    if (component == 0)
      {
      scalars = vtkFloatArray::New();
      scalars->SetNumberOfTuples(numCells);
      scalars->SetNumberOfComponents(numberOfComponents);
      scalars->Allocate(numCells * numberOfComponents);
      }
    else
      {
      scalars = (vtkFloatArray*)(output->GetCellData()->GetArray(description));
      }
    
    // need to find out from CellIds how many cells we have of this element
    // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
    if (strcmp(line, "block") == 0)
      {
      numLines = numCells / 6;
      moreScalars = numCells % 6;
      for (i = 0; i < numLines; i++)
        {
        this->ReadNextDataLine(line);
        entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &scalarsRead[0],
               &scalarsRead[1], &scalarsRead[2], &scalarsRead[3],
               &scalarsRead[4], &scalarsRead[5]);
        assert( entries == 6 );
        for (j = 0; j < 6; j++)
          {
          scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);
          }
        }
      lineRead = this->ReadNextDataLine(line);
      
      if (moreScalars)
        {
        for (j = 0; j < moreScalars; j++)
          {
          entries = vtkEnSight6ReaderRead4(line+j*12,&scalarsRead[j]);
          assert( entries == 1 );
          scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);
          }
        }
      }
    else 
      {
      while (lineRead && strncmp(line, "part", 4) != 0)
        {
        elementType = this->GetElementType(line);
        if (elementType < 0)
          {
          vtkErrorMacro("invalid element type");
          delete this->IS;
          this->IS = NULL;
          return 0;
          }
        idx = this->UnstructuredPartIds->IsId(partId);
        numCellsPerElement = this->GetCellIds(idx, elementType)->GetNumberOfIds();
        numLines = numCellsPerElement / 6;
        moreScalars = numCellsPerElement % 6;
        for (i = 0; i < numLines; i++)
          {
          this->ReadNextDataLine(line);
          entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &scalarsRead[0],
                 &scalarsRead[1], &scalarsRead[2], &scalarsRead[3],
                 &scalarsRead[4], &scalarsRead[5]);
          assert( entries == 6 );
          for (j = 0; j < 6; j++)
            {
            scalars->InsertComponent(this->GetCellIds(idx, elementType)->
                                     GetId(i*6 + j), component,
                                     scalarsRead[j]);
            }
          }
        if (moreScalars)
          {
          this->ReadNextDataLine(line);
          for (j = 0; j < moreScalars; j++)
            {
            vtkEnSight6ReaderRead4(line+j*12,&scalarsRead[j]);
            scalars->InsertComponent(this->GetCellIds(idx, elementType)->
                                     GetId(i*6 + j), component,
                                     scalarsRead[j]);
            }
          }
        lineRead = this->ReadNextDataLine(line);
        } // end while
      } // end else
    if (component == 0)
      {
      scalars->SetName(description);
      output->GetCellData()->AddArray(scalars);
      if (!output->GetCellData()->GetScalars())
        {
        output->GetCellData()->SetScalars(scalars);
        }
      scalars->Delete();
      }
    else
      {
      output->GetCellData()->AddArray(scalars);
      }
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadVectorsPerElement(const char* fileName,
                                             const char* description,
                                             int timeStep)
{
  char line[256];
  int partId, numCells, numCellsPerElement, i, j, k, idx;
  vtkFloatArray *vectors;
  int lineRead, elementType;
  float values[6], vector1[3], vector2[3];
  int numLines, moreVectors;
  vtkDataSet *output;
  int entries;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL VectorPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to vector per element file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadLine(line); // skip the description line
  lineRead = this->ReadNextDataLine(line); // "part"
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    vectors = vtkFloatArray::New();
    sscanf(line, " part %d", &partId);
    partId--; // EnSight starts #ing with 1.
    int realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numCells = output->GetNumberOfCells();
    this->ReadNextDataLine(line); // element type or "block"
    vectors->SetNumberOfTuples(numCells);
    vectors->SetNumberOfComponents(3);
    vectors->Allocate(numCells*3);
    
    // need to find out from CellIds how many cells we have of this element
    // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
    if (strcmp(line, "block") == 0)
      {
      numLines = numCells / 6;
      moreVectors = numCells % 6;
      
      for (k = 0; k < 3; k++)
        {
        for (i = 0; i < numLines; i++)
          {
          this->ReadNextDataLine(line);
          entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &values[0],
                 &values[1], &values[2], &values[3], &values[4], &values[5]);
          assert( entries == 6 );
          for (j = 0; j < 6; j++)
            {
            vectors->InsertComponent(i*6 + j, k, values[j]);
            }
          }
        if (moreVectors)
          {
          this->ReadNextDataLine(line);
          for (j = 0; j < moreVectors; j++)
            {
            vtkEnSight6ReaderRead4(line+j*12,&values[j]);
            vectors->InsertComponent(i*6 + j, k, values[j]);
            }
          }
        }
      lineRead = this->ReadNextDataLine(line);
      }
    else 
      {
      while (lineRead && strncmp(line, "part", 4) != 0)
        {
        elementType = this->GetElementType(line);
        if (elementType < 0)
          {
          vtkErrorMacro("invalid element type");
          delete this->IS;
          this->IS = NULL;
          return 0;
          }
        idx = this->UnstructuredPartIds->IsId(partId);
        numCellsPerElement = this->GetCellIds(idx, elementType)->GetNumberOfIds();
        numLines = numCellsPerElement / 2;
        moreVectors = ((numCellsPerElement*3) % 6) / 3;
        
        for (i = 0; i < numLines; i++)
          {
          this->ReadNextDataLine(line);
          entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &vector1[0],
                 &vector1[1], &vector1[2], &vector2[0], &vector2[1],
                 &vector2[2]);
          assert( entries == 6 );
          vectors->InsertTuple(this->GetCellIds(idx, elementType)->GetId(2*i),
                               vector1);
          vectors->InsertTuple(this->GetCellIds(idx, elementType)->GetId(2*i + 1),
                               vector2);
          }
        if (moreVectors)
          {
          this->ReadNextDataLine(line);
          for (j = 0; j < moreVectors; j++)
            {
            vtkEnSight6ReaderRead4(line+j*36,&vector1[0]);
            vtkEnSight6ReaderRead4(line+j*36+12,&vector1[1]);
            vtkEnSight6ReaderRead4(line+j*36+24,&vector1[2]);
            vectors->InsertTuple(this->GetCellIds(idx, elementType)->
                                 GetId(2*i + j), vector1);
            }
          }
        lineRead = this->ReadNextDataLine(line);
        } // end while
      } // end else
    vectors->SetName(description);
    output->GetCellData()->AddArray(vectors);
    if (!output->GetCellData()->GetVectors())
      {
      output->GetCellData()->SetVectors(vectors);
      }
    vectors->Delete();
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::ReadTensorsPerElement(const char* fileName,
                                             const char* description,
                                             int timeStep)
{
  char line[256];
  int partId, numCells, numCellsPerElement, i, j, k, idx;
  vtkFloatArray *tensors;
  int lineRead, elementType;
  float values[6], tensor[6];
  int numLines, moreTensors;
  vtkDataSet *output;
  int entries;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL TensorPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to tensor per element file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadLine(line); // skip the description line
  lineRead = this->ReadNextDataLine(line); // "part"
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    tensors = vtkFloatArray::New();
    sscanf(line, " part %d", &partId);
    partId--; // EnSight starts #ing with 1.
    int realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numCells = output->GetNumberOfCells();
    this->ReadNextDataLine(line); // element type or "block"
    tensors->SetNumberOfTuples(numCells);
    tensors->SetNumberOfComponents(6);
    tensors->Allocate(numCells*6);
    
    // need to find out from CellIds how many cells we have of this element
    // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
    if (strcmp(line, "block") == 0)
      {
      numLines = numCells / 6;
      moreTensors = numCells % 6;
      
      for (k = 0; k < 6; k++)
        {
        for (i = 0; i < numLines; i++)
          {
          this->ReadNextDataLine(line);
          entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &values[0],
                 &values[1], &values[2], &values[3], &values[4], &values[5]);
          assert( entries == 6 );
          for (j = 0; j < 6; j++)
            {
            tensors->InsertComponent(i*6 + j, k, values[j]);
            }
          }
        if (moreTensors)
          {
          this->ReadNextDataLine(line);
          for (j = 0; j < moreTensors; j++)
            {
            vtkEnSight6ReaderRead4(line+j*12,&values[j]);
            tensors->InsertComponent(i*6 + j, k, values[j]);
            }
          }
        }
      lineRead = this->ReadNextDataLine(line);
      }
    else 
      {
      while (lineRead && strncmp(line, "part", 4) != 0)
        {
        elementType = this->GetElementType(line);
        if (elementType < 0)
          {
          vtkErrorMacro("invalid element type");
          delete this->IS;
          this->IS = NULL;
          return 0;
          }
        idx = this->UnstructuredPartIds->IsId(partId);
        numCellsPerElement = this->GetCellIds(idx, elementType)->GetNumberOfIds();
        numLines = numCellsPerElement;
        
        for (i = 0; i < numLines; i++)
          {
          this->ReadNextDataLine(line);
          entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &tensor[0],
                 &tensor[1], &tensor[2], &tensor[3], &tensor[4], &tensor[5]);
          assert( entries == 6 );
          tensors->InsertTuple(this->GetCellIds(idx, elementType)->GetId(i),
                               tensor);
          }
        lineRead = this->ReadNextDataLine(line);
        } // end while
      } // end else
    tensors->SetName(description);
    output->GetCellData()->AddArray(tensors);
    tensors->Delete();
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::CreateUnstructuredGridOutput(int partId,
                                                    char line[256],
                                                    const char* name)
{
  int lineRead = 1;
  char subLine[256];
  int i, j;
  vtkIdType *nodeIds;
  int *intIds;
  int numElements;
  int idx, cellId, cellType, testId;
  
  this->NumberOfNewOutputs++;
  
  if (this->GetOutput(partId) == NULL)
    {
    vtkDebugMacro("creating new unstructured output");
    vtkUnstructuredGrid* ugrid = vtkUnstructuredGrid::New();
    this->SetNthOutput(partId, ugrid);
    ugrid->Delete();
 
    this->UnstructuredPartIds->InsertNextId(partId);
    }
  else if ( ! this->GetOutput(partId)->IsA("vtkUnstructuredGrid"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }
  
  vtkUnstructuredGrid* output = vtkUnstructuredGrid::SafeDownCast(
    this->GetOutput(partId));

  vtkCharArray* nmArray = vtkCharArray::New();
  nmArray->SetName("Name");
  size_t len = strlen(name);
  nmArray->SetNumberOfTuples(static_cast<vtkIdType>(len)+1);
  char* copy = nmArray->GetPointer(0);
  memcpy(copy, name, len);
  copy[len] = '\0';
  output->GetFieldData()->AddArray(nmArray);
  nmArray->Delete();

  // Clear all cell ids from the last execution, if any.
  idx = this->UnstructuredPartIds->IsId(partId);
  for (i = 0; i < 16; i++)
    {
    this->GetCellIds(idx, i)->Reset();
    }
  
  output->Allocate(1000);
  
  while(lineRead && strncmp(line, "part", 4) != 0)
    {
    if (strncmp(line, "point", 5) == 0)
      {
      vtkDebugMacro("point");
      
      nodeIds = new vtkIdType[1];        
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (sscanf(line, " %*s %s", subLine) == 1)
          {
          // element ids listed
          // EnSight ids start at 1
          if (this->UnstructuredNodeIds)
            {
            nodeIds[0] =
              this->UnstructuredNodeIds->GetValue(atoi(subLine) - 1);
            }
          else
            {
            nodeIds[0] = atoi(subLine) - 1;
            }
          }
        else
          {
          if (this->UnstructuredNodeIds)
            {
            nodeIds[0] = this->UnstructuredNodeIds->GetValue(atoi(line) - 1);
            }
          else
            {
            nodeIds[0] = atoi(line) - 1;
            }
          }
        cellId = output->InsertNextCell(VTK_VERTEX, 1, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::POINT)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      }
    else if (strncmp(line, "bar2", 4) == 0)
      {
      vtkDebugMacro("bar2");
      
      nodeIds = new vtkIdType[2];
      intIds = new int[2];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (sscanf(line, " %*d %d %d", &intIds[0], &intIds[1]) != 2)
          {
          sscanf(line, " %d %d", &intIds[0], &intIds[1]);
          }
        for (j = 0; j < 2; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 2; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 2; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_LINE, 2, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::BAR2)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "bar3", 4) == 0)
      {
      vtkDebugMacro("bar3");
      vtkDebugMacro("Only vertex nodes of this element will be read.");
      nodeIds = new vtkIdType[2];
      intIds = new int[2];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (sscanf(line, " %*d %d %*d %d", &intIds[0], &intIds[1]) != 2)
          {
          sscanf(line, " %d %*d %d", &intIds[0], &intIds[1]);
          }
        for (j = 0; j < 2; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 2; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 2; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_LINE, 2, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::BAR3)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "tria3", 5) == 0 ||
             strncmp(line, "tria6", 5) == 0)
      {
      if (strncmp(line, "tria6", 5) == 0)
        {
        vtkDebugMacro("tria6");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::TRIA6;
        }
      else
        {
        vtkDebugMacro("tria3");
        cellType = vtkEnSightReader::TRIA3;
        }
      
      nodeIds = new vtkIdType[3];
      intIds = new int[3];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (!(sscanf(line, " %*d %d %d %d", &intIds[0], &intIds[1],
                     &intIds[2]) == 3 &&
              cellType == vtkEnSightReader::TRIA3) &&
            !(sscanf(line, " %*d %d %d %d %*d %*d %d", &intIds[0], &intIds[1],
                     &intIds[2], &testId) == 4 &&
              cellType == vtkEnSightReader::TRIA6))
          {
          sscanf(line, " %d %d %d", &intIds[0], &intIds[1], &intIds[2]);
          }
        for (j = 0; j < 3; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 3; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 3; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_TRIANGLE, 3, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "quad4", 5) == 0 ||
             strncmp(line, "quad8", 5) == 0)
      {
      if (strncmp(line, "quad8", 5) == 0)
        {
        vtkDebugMacro("quad8");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::QUAD8;
        }
      else
        {
        vtkDebugMacro("quad4");
        cellType = vtkEnSightReader::QUAD4;
        }
      
      nodeIds = new vtkIdType[4];
      intIds = new int[4];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (!(sscanf(line, " %*d %d %d %d %d", &intIds[0], &intIds[1],
                     &intIds[2], &intIds[3]) == 4 &&
              cellType == vtkEnSightReader::QUAD4) &&
            !(sscanf(line, " %*d %d %d %d %d %*d %*d %*d %d", &intIds[0],
                     &intIds[1], &intIds[2], &intIds[3], &testId) == 5 &&
              cellType == vtkEnSightReader::QUAD8))
          {
          sscanf(line, " %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
                 &intIds[3]);
          }
        for (j = 0; j < 4; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 4; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 4; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_QUAD, 4, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "tetra4", 6) == 0 ||
             strncmp(line, "tetra10", 7) == 0)
      {
      if (strncmp(line, "tetra10", 7) == 0)
        {
        vtkDebugMacro("tetra10");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::TETRA10;
        }
      else
        {
        vtkDebugMacro("tetra4");
        cellType = vtkEnSightReader::TETRA4;
        }
      
      nodeIds = new vtkIdType[4];
      intIds = new int[4];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (!(sscanf(line, " %*d %d %d %d %d", &intIds[0], &intIds[1],
                     &intIds[2], &intIds[3]) == 4 &&
              cellType == vtkEnSightReader::TETRA4) &&
            !(sscanf(line, " %*d %d %d %d %d %*d %*d %*d %*d %*d %d",
                     &intIds[0], &intIds[1], &intIds[2], &intIds[3],
                     &testId) == 5 &&
              cellType == vtkEnSightReader::TETRA10))
          {
          sscanf(line, " %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
                 &intIds[3]);
          }
        for (j = 0; j < 4; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 4; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 4; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_TETRA, 4, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "pyramid5", 8) == 0 ||
             strncmp(line, "pyramid13", 9) == 0)
      {
      if (strncmp(line, "pyramid13", 9) == 0)
        {
        vtkDebugMacro("pyramid13");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::PYRAMID13;
        }
      else
        {
        vtkDebugMacro("pyramid5");
        cellType = vtkEnSightReader::PYRAMID5;
        }

      nodeIds = new vtkIdType[5];
      intIds = new int[5];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (!(sscanf(line, " %*d %d %d %d %d %d", &intIds[0], &intIds[1],
                     &intIds[2], &intIds[3], &intIds[4]) == 5 &&
              cellType == vtkEnSightReader::PYRAMID5) &&
            !(sscanf(line, " %*d %d %d %d %d %d %*d %*d %*d %*d %*d %*d %*d %d",
                     &intIds[0], &intIds[1], &intIds[2], &intIds[3],
                     &intIds[4], &testId) == 6 &&
              cellType == vtkEnSightReader::PYRAMID13))
          {
          sscanf(line, " %d %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
                 &intIds[3], &intIds[4]);
          }
        for (j = 0; j < 5; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 5; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 5; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_PYRAMID, 5, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "hexa8", 5) == 0 ||
             strncmp(line, "hexa20", 6) == 0)
      {
      if (strncmp(line, "hexa20", 6) == 0)
        {
        vtkDebugMacro("hexa20");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::HEXA20;
        }
      else
        {
        vtkDebugMacro("hexa8");
        cellType = vtkEnSightReader::HEXA8;
        }
      
      nodeIds = new vtkIdType[8];
      intIds = new int[8];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (!(sscanf(line, " %*d %d %d %d %d %d %d %d %d", &intIds[0],
                     &intIds[1], &intIds[2], &intIds[3], &intIds[4],
                     &intIds[5], &intIds[6], &intIds[7]) == 8 &&
              cellType == vtkEnSightReader::HEXA8) &&
            !(sscanf(line, " %*d %d %d %d %d %d %d %d %d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %d",
                     &intIds[0], &intIds[1], &intIds[2], &intIds[3],
                     &intIds[4], &intIds[5], &intIds[6], &intIds[7],
                     &testId) == 9 &&
              cellType == vtkEnSightReader::HEXA20))
          {
          sscanf(line, " %d %d %d %d %d %d %d %d", &intIds[0], &intIds[1],
                 &intIds[2], &intIds[3], &intIds[4], &intIds[5],
                 &intIds[6], &intIds[7]);
          }
        for (j = 0; j < 8; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 8; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 8; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_HEXAHEDRON, 8, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "penta6", 6) == 0 ||
             strncmp(line, "penta15", 7) == 0)
      {
      if (strncmp(line, "penta15", 7) == 0)
        {
        vtkDebugMacro("penta15");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::PENTA15;
        }
      else
        {
        vtkDebugMacro("penta6");
        cellType = vtkEnSightReader::PENTA6;
        }
      
      nodeIds = new vtkIdType[6];
      intIds = new int[6];
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      lineRead = this->ReadNextDataLine(line);
      
      for (i = 0; i < numElements; i++)
        {
        if (!(sscanf(line, " %*d %d %d %d %d %d %d", &intIds[0],
                     &intIds[1], &intIds[2], &intIds[3], &intIds[4],
                     &intIds[5]) == 6 &&
              cellType == vtkEnSightReader::PENTA6) &&
            !(sscanf(line, " %*d %d %d %d %d %d %d %*d %*d %*d %*d %*d %*d %*d %*d %d",
                     &intIds[0], &intIds[1], &intIds[2], &intIds[3],
                     &intIds[4], &intIds[5], &testId) == 7 &&
              cellType == vtkEnSightReader::PENTA15))
          {
          sscanf(line, " %d %d %d %d %d %d", &intIds[0], &intIds[1],
                 &intIds[2], &intIds[3], &intIds[4], &intIds[5]);
          }
        for (j = 0; j < 6; j++)
          {
          intIds[j]--;
          }
        if (this->UnstructuredNodeIds)
          {
          for (j = 0; j < 6; j++)
            {
            intIds[j] = this->UnstructuredNodeIds->GetValue(intIds[j]);
            }
          }
        for (j = 0; j < 6; j++)
          {
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_WEDGE, 6, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "END TIME STEP", 13) == 0)
      {
      break;
      }
    }

  output->SetPoints(this->UnstructuredPoints);

  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSight6Reader::CreateStructuredGridOutput(int partId,
                                                  char line[256],
                                                  const char* name)
{
  char subLine[256];
  char formatLine[256], tempLine[256];
  int lineRead = 1;
  int iblanked = 0;
  int dimensions[3];
  int i, j;
  vtkPoints *points = vtkPoints::New();
  double point[3];
  int numPts, numLines, moreCoords, moreBlanking;
  float coords[6];
  int iblanks[10];
  int entries;
  
  this->NumberOfNewOutputs++;
  
  if (this->GetOutput(partId) == NULL)
    {
    vtkDebugMacro("creating new structured grid output");
    vtkStructuredGrid* sgrid = vtkStructuredGrid::New();
    this->SetNthOutput(partId, sgrid);
    sgrid->Delete();
    }
  else if ( ! this->GetOutput(partId)->IsA("vtkStructuredGrid"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }
  
  vtkStructuredGrid* output = vtkStructuredGrid::SafeDownCast(
    this->GetOutput(partId));    

  vtkCharArray* nmArray =  vtkCharArray::New();
  nmArray->SetName("Name");
  size_t len = strlen(name);
  nmArray->SetNumberOfTuples(static_cast<vtkIdType>(len)+1);
  char* copy = nmArray->GetPointer(0);
  memcpy(copy, name, len);
  copy[len] = '\0';
  output->GetFieldData()->AddArray(nmArray);
  nmArray->Delete();

  if (sscanf(line, " %*s %s", subLine) == 1)
    {
    if (strcmp(subLine, "iblanked") == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadNextDataLine(line);
  sscanf(line, " %d %d %d", &dimensions[0], &dimensions[1], &dimensions[2]);
  output->SetDimensions(dimensions);
  output->SetWholeExtent(
    0, dimensions[0]-1, 0, dimensions[1]-1, 0, dimensions[2]-1);
  numPts = dimensions[0] * dimensions[1] * dimensions[2];
  points->Allocate(numPts);
  
  numLines = numPts / 6; // integer division
  moreCoords = numPts % 6;
  
  for (i = 0; i < numLines; i++)
    {
    this->ReadNextDataLine(line);
    entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &coords[0], &coords[1],
           &coords[2], &coords[3], &coords[4], &coords[5]);
    assert( entries == 6 );
    for (j = 0; j < 6; j++)
      {
      points->InsertNextPoint(coords[j], 0.0, 0.0);
      }
    }
  if (moreCoords != 0)
    {
    this->ReadNextDataLine(line);
    for (j = 0; j < moreCoords; j++)
      {
      vtkEnSight6ReaderRead4(line+j*12,&coords[j]);
      points->InsertNextPoint(coords[j], 0.0, 0.0);
      }
    }
  for (i = 0; i < numLines; i++)
    {
    this->ReadNextDataLine(line);
    entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &coords[0], &coords[1],
           &coords[2], &coords[3], &coords[4], &coords[5]);
    assert( entries == 6 );
    for (j = 0; j < 6; j++)
      {
      points->GetPoint(i*6+j, point);
      points->SetPoint(i*6+j, point[0], 
                       static_cast<double>(coords[j]), point[2]);
      }
    }
  if (moreCoords != 0)
    {
    this->ReadNextDataLine(line);
    for (j = 0; j < moreCoords; j++)
      {
      vtkEnSight6ReaderRead4(line+j*12,&coords[j]);
      points->GetPoint(i*6+j, point);
      points->SetPoint(i*6+j, point[0], 
                       static_cast<double>(coords[j]), point[2]);
      }
    }
  for (i = 0; i < numLines; i++)
    {
    this->ReadNextDataLine(line);
    entries = vtkEnSight6ReaderRead3(line, " %12e %12e %12e %12e %12e %12e", &coords[0], &coords[1],
           &coords[2], &coords[3], &coords[4], &coords[5]);
    assert( entries == 6 );
    for (j = 0; j < 6; j++)
      {
      points->GetPoint(i*6+j, point);
      points->SetPoint(i*6+j, point[0], point[1], 
                       static_cast<double>(coords[j]));
      }
    }
  if (moreCoords != 0)
    {
    this->ReadNextDataLine(line);
    for (j = 0; j < moreCoords; j++)
      {
      vtkEnSight6ReaderRead4(line+j*12,&coords[j]);
      points->GetPoint(i*6+j, point);
      points->SetPoint(i*6+j, point[0], point[1], 
                       static_cast<double>(coords[j]));
      }
    }
  
  numLines = numPts / 10;
  moreBlanking = numPts % 10;
  output->SetPoints(points);
  if (iblanked)
    {
    for (i = 0; i < numLines; i++)
      {
      this->ReadNextDataLine(line);
      sscanf(line, " %d %d %d %d %d %d %d %d %d %d", &iblanks[0], &iblanks[1],
             &iblanks[2], &iblanks[3], &iblanks[4], &iblanks[5], &iblanks[6],
             &iblanks[7], &iblanks[8], &iblanks[9]);
      for (j = 0; j < 10; j++)
        {
        if (!iblanks[j])
          {
          output->BlankPoint(i*numLines+j);
          }
        }
      }
    if (moreBlanking != 0)
      {
      this->ReadNextDataLine(line);
      strcpy(formatLine, "");
      strcpy(tempLine, "");
      for (j = 0; j < moreBlanking; j++)
        {
        strcat(formatLine, " %d");
        sscanf(line, formatLine, &iblanks[j]);
        if (!iblanks[j])
          {
          output->BlankPoint(i*numLines+j);
          }
        strcat(tempLine, " %*d");
        strcpy(formatLine, tempLine);
        }
      }
    }
  
  points->Delete();
  // reading next line to check for EOF
  lineRead = this->ReadNextDataLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
void vtkEnSight6Reader::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
}
