vtkParticleReader.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkParticleReader.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.

=========================================================================*/
#ifndef __vtkParticleReader_h
#define __vtkParticleReader_h

#include "vtkPolyDataAlgorithm.h"

#define VTK_FILE_BYTE_ORDER_BIG_ENDIAN 0
#define VTK_FILE_BYTE_ORDER_LITTLE_ENDIAN 1


class VTK_IO_EXPORT vtkParticleReader : public vtkPolyDataAlgorithm
{
public:
  static vtkParticleReader *New();
  vtkTypeRevisionMacro(vtkParticleReader,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);   


  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);


  void SetDataByteOrderToBigEndian();
  void SetDataByteOrderToLittleEndian();
  int GetDataByteOrder();
  void SetDataByteOrder(int);
  const char *GetDataByteOrderAsString();


  vtkSetMacro(SwapBytes,int);
  int GetSwapBytes() {return this->SwapBytes;}
  vtkBooleanMacro(SwapBytes,int);
  

  vtkSetMacro(HasScalar,int);
  vtkGetMacro(HasScalar,int);
  vtkBooleanMacro(HasScalar,int);


  vtkSetClampMacro(FileType, int, FILE_TYPE_IS_UNKNOWN, FILE_TYPE_IS_BINARY);
  vtkGetMacro(FileType, int);
  void SetFileTypeToUnknown() {this->SetFileType(FILE_TYPE_IS_UNKNOWN);}
  void SetFileTypeToText() {this->SetFileType(FILE_TYPE_IS_TEXT);}
  void SetFileTypeToBinary() {this->SetFileType(FILE_TYPE_IS_BINARY);}


  vtkSetClampMacro(DataType, int, VTK_FLOAT, VTK_DOUBLE);
  vtkGetMacro(DataType, int);
  void SetDataTypeToFloat() {this->SetDataType(VTK_FLOAT);}
  void SetDataTypeToDouble() {this->SetDataType(VTK_DOUBLE);}


protected:
  vtkParticleReader();
  ~vtkParticleReader();

  void OpenFile();

  char *FileName;
  ifstream *File;

  int RequestInformation(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  

  int ProduceOutputFromTextFileDouble(vtkInformationVector *outputVector);
  int ProduceOutputFromTextFileFloat(vtkInformationVector *outputVector);


  int ProduceOutputFromBinaryFileDouble(vtkInformationVector *outputVector);
  int ProduceOutputFromBinaryFileFloat(vtkInformationVector *outputVector);

  int DetermineFileType();
  
  void DoProgressUpdate( size_t & bytesRead, size_t & fileLength );

  //BTX

  enum FILE_TYPE { FILE_TYPE_IS_UNKNOWN = 0, 
    FILE_TYPE_IS_TEXT, FILE_TYPE_IS_BINARY };
  //ETX
  
  int HasScalar;

  int FileType;
  // Description:
  // Used to specify the data type.
  int DataType;


  size_t Alliquot;
  // Description:
  // Count of the number of alliquots processed.
  size_t Count;

  int SwapBytes;
  size_t NumberOfPoints;

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

#endif

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