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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkEnSight6Reader.h,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.

=========================================================================*/
// .NAME vtkEnSight6Reader - class to read EnSight6 files
// .SECTION Description
// vtkEnSight6Reader is a class to read EnSight6 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).

#ifndef __vtkEnSight6Reader_h
#define __vtkEnSight6Reader_h

#include "vtkEnSightReader.h"

class vtkMultiBlockDataSet;
class vtkIdTypeArray;
class vtkPoints;

class VTK_IO_EXPORT vtkEnSight6Reader : public vtkEnSightReader
{
public:
  static vtkEnSight6Reader *New();
  vtkTypeRevisionMacro(vtkEnSight6Reader, vtkEnSightReader);
  virtual void PrintSelf(ostream& os, vtkIndent indent);
  
protected:
  vtkEnSight6Reader();
  ~vtkEnSight6Reader();
  
  // 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 scalars array, we assume that 0 is the first component added to the array.
  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 component in the
  // scalars array, we assume that 0 is the first component added to the array.
  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.
  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
  // vtkStructuredGridOutput.  Return 0 if EOF reached.
  virtual int CreateStructuredGridOutput(int partId, 
                                         char line[256],
                                         const char* name,
                                         vtkMultiBlockDataSet *output);
  
  // global list of points for the unstructured parts of the model
  int NumberOfUnstructuredPoints;
  vtkPoints* UnstructuredPoints;
  vtkIdTypeArray* UnstructuredNodeIds; // matching of node ids to point ids
private:
  vtkEnSight6Reader(const vtkEnSight6Reader&);  // Not implemented.
  void operator=(const vtkEnSight6Reader&);  // Not implemented.
};

#endif