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

  Program:   Visualization Toolkit
  Module:    vtkEnSightGoldReader.h

  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.

=========================================================================*/
// .NAME vtkEnSightGoldReader - class to read EnSight Gold files
// .SECTION Description
// vtkEnSightGoldReader is a class to read EnSight Gold files into vtk.
// Because the different parts of the EnSight data can be of various data
// types, this reader produces multiple outputs, one per part in the input
// file.
// All variable information is being stored in field data.  The descriptions
// listed in the case file are used as the array names in the field data.
// For complex vector variables, the description is appended with _r (for the
// array of real values) and _i (for the array if imaginary values).  Complex
// scalar variables are stored as a single array with 2 components, real and
// imaginary, listed in that order.
// .SECTION Caveats
// You must manually call Update on this reader and then connect the rest
// of the pipeline because (due to the nature of the file format) it is
// not possible to know ahead of time how many outputs you will have or
// what types they will be.
// This reader can only handle static EnSight datasets (both static geometry
// and variables).
// .SECTION Thanks
// Thanks to Yvan Fournier for providing the code to support nfaced elements.

#ifndef __vtkEnSightGoldReader_h
#define __vtkEnSightGoldReader_h

#include "vtkEnSightReader.h"


class vtkMultiBlockDataSet;

class VTK_IO_EXPORT vtkEnSightGoldReader : public vtkEnSightReader
{
public:
  static vtkEnSightGoldReader *New();
  vtkTypeMacro(vtkEnSightGoldReader, vtkEnSightReader);
  virtual void PrintSelf(ostream& os, vtkIndent indent);

protected:
  vtkEnSightGoldReader();
  ~vtkEnSightGoldReader();

  // Description:
  // Read the geometry file.  If an error occurred, 0 is returned; otherwise 1.
  virtual int ReadGeometryFile(const char* fileName, int timeStep,
    vtkMultiBlockDataSet *output);

  // Description:
  // Read the measured geometry file.  If an error occurred, 0 is returned;
  // otherwise 1.
  virtual int ReadMeasuredGeometryFile(const char* fileName, int timeStep,
    vtkMultiBlockDataSet *output);

  // Description:
  // Read scalars per node for this dataset.  If an error occurred, 0 is
  // returned; otherwise 1.  If there will be more than one component in
  // the data array, it is assumed that 0 is the first component added.
  virtual int ReadScalarsPerNode(const char* fileName, const char* description,
    int timeStep, vtkMultiBlockDataSet *output,
    int measured = 0,
    int numberOfComponents = 1,
    int component = 0);

  // Description:
  // Read vectors per node for this dataset.  If an error occurred, 0 is
  // returned; otherwise 1.
  virtual int ReadVectorsPerNode(const char* fileName, const char* description,
    int timeStep, vtkMultiBlockDataSet *output,
    int measured = 0);

  // Description:
  // Read tensors per node for this dataset.  If an error occurred, 0 is
  // returned; otherwise 1.
  virtual int ReadTensorsPerNode(const char* fileName, const char* description,
    int timeStep, vtkMultiBlockDataSet *output);

  // Description:
  // Read scalars per element for this dataset.  If an error occurred, 0 is
  // returned; otherwise 1.  If there will be more than one componenet in the
  // data array, it is assumed that 0 is the first component added.
  virtual int ReadScalarsPerElement(const char* fileName, const char* description,
    int timeStep, vtkMultiBlockDataSet *output,
    int numberOfComponents = 1,
    int component = 0);

  // Description:
  // Read vectors per element for this dataset.  If an error occurred, 0 is
  // returned; otherwise 1.
  virtual int ReadVectorsPerElement(const char* fileName, const char* description,
    int timeStep, vtkMultiBlockDataSet *output);

  // Description:
  // Read tensors per element for this dataset.  If an error occurred, 0 is
  // returned; otherwise 1.
  virtual int ReadTensorsPerElement(const char* fileName, const char* description,
    int timeStep, vtkMultiBlockDataSet *output);

  // Description:
  // Read an unstructured part (partId) from the geometry file and create a
  // vtkUnstructuredGrid output.  Return 0 if EOF reached. Return -1 if
  // an error occurred.
  virtual int CreateUnstructuredGridOutput(int partId,
    char line[256],
    const char* name,
    vtkMultiBlockDataSet *output);

  // Description:
  // Read a structured part from the geometry file and create a
  // vtkStructuredGrid output.  Return 0 if EOF reached.
  virtual int CreateStructuredGridOutput(int partId,
    char line[256],
    const char* name,
    vtkMultiBlockDataSet *output);

  // Description:
  // Read a structured part from the geometry file and create a
  // vtkRectilinearGrid output.  Return 0 if EOF reached.
  int CreateRectilinearGridOutput(int partId, char line[256], const char* name,
    vtkMultiBlockDataSet *output);

  // Description:
  // Read a structured part from the geometry file and create a
  // vtkImageData output.  Return 0 if EOF reached.
  int CreateImageDataOutput(int partId, char line[256], const char* name,
    vtkMultiBlockDataSet *output);

  // Description:
  // Set/Get the Model file name.
  vtkSetStringMacro(GeometryFileName);
  vtkGetStringMacro(GeometryFileName);

  // Description:
  // Set/Get the Measured file name.
  vtkSetStringMacro(MeasuredFileName);
  vtkGetStringMacro(MeasuredFileName);

  // Description:
  // Set/Get the Match file name.
  vtkSetStringMacro(MatchFileName);
  vtkGetStringMacro(MatchFileName);

  // Description:
  // Skip next line in file if the 'undef' or 'partial' keyword was
  // specified after a sectional keyword
  int CheckForUndefOrPartial(const char *line);

  int NodeIdsListed;
  int ElementIdsListed;

  //BTX
  class UndefPartialInternal;
  // Description:
  // Handle the undef / partial support for EnSight gold
  UndefPartialInternal* UndefPartial;
  //ETX

  //BTX
  class FileOffsetMapInternal;
  FileOffsetMapInternal *FileOffsets;
  //ETX

private:
  vtkEnSightGoldReader(const vtkEnSightGoldReader&);  // Not implemented.
  void operator=(const vtkEnSightGoldReader&);  // Not implemented.
};

#endif