dox/IO/vtkAVSucdReader.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkAVSucdReader.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 __vtkAVSucdReader_h
#define __vtkAVSucdReader_h

#include "vtkUnstructuredGridAlgorithm.h"

class vtkIntArray;
class vtkFloatArray;
class vtkIdTypeArray;
class vtkDataArraySelection;

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


  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);


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


  vtkGetMacro(NumberOfCells,int);


  vtkGetMacro(NumberOfNodes,int);


  vtkGetMacro(NumberOfNodeFields,int);


  vtkGetMacro(NumberOfCellFields,int);


  vtkGetMacro(NumberOfFields,int);


  vtkGetMacro(NumberOfNodeComponents,int);
  vtkGetMacro(NumberOfCellComponents,int);


  void SetByteOrderToBigEndian();
  void SetByteOrderToLittleEndian();
  const char *GetByteOrderAsString();

  vtkSetMacro(ByteOrder, int);
  vtkGetMacro(ByteOrder, int);


  int GetNumberOfPointArrays();
  int GetNumberOfCellArrays();
  const char* GetPointArrayName(int index);
  const char* GetCellArrayName(int index);
  int GetPointArrayStatus(const char* name);
  int GetCellArrayStatus(const char* name);
  void SetPointArrayStatus(const char* name, int status);  
  void SetCellArrayStatus(const char* name, int status);

  void DisableAllCellArrays();
  void EnableAllCellArrays();
  void DisableAllPointArrays();
  void EnableAllPointArrays();

  // get min and max value for the index-th value of a cell component
  // index varies from 0 to (veclen - 1)
  void GetCellDataRange(int cellComp, int index, float *min, float *max);

  // get min and max value for the index-th value of a node component
  // index varies from 0 to (veclen - 1)
  void GetNodeDataRange(int nodeComp, int index, float *min, float *max);

protected:
  vtkAVSucdReader();
  ~vtkAVSucdReader();
  int RequestInformation(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);

  char *FileName;
  int BinaryFile;

  int NumberOfNodes;
  int NumberOfCells;
  int NumberOfNodeFields;
  int NumberOfNodeComponents;
  int NumberOfCellComponents;
  int NumberOfCellFields;
  int NumberOfFields;
  int NlistNodes;

  ifstream *FileStream;

  vtkDataArraySelection* PointDataArraySelection;
  vtkDataArraySelection* CellDataArraySelection;

  int DecrementNodeIds;
  int ByteOrder;
  int GetLabel(char *string, int number, char *label);
  //BTX
  enum
  {
    FILE_BIG_ENDIAN=0,
    FILE_LITTLE_ENDIAN=1
  };
  enum UCDCell_type
  {
    PT    = 0,
    LINE  = 1,
    TRI   = 2,
    QUAD  = 3,
    TET   = 4,
    PYR   = 5,
    PRISM = 6,
    HEX   = 7
  };

  struct DataInfo {
    long foffset; // offset in binary file
    int  veclen;  // number of components in the node or cell variable
    float min[3]; // pre-calculated data minima (max size 3 for vectors)
    float max[3]; // pre-calculated data maxima (max size 3 for vectors)
  };
  //ETX

  DataInfo *NodeDataInfo;
  DataInfo *CellDataInfo;

private:
  void ReadFile(vtkUnstructuredGrid *output);
  void ReadGeometry(vtkUnstructuredGrid *output);
  void ReadNodeData(vtkUnstructuredGrid *output);
  void ReadCellData(vtkUnstructuredGrid *output);

  int ReadFloatBlock(int n, float *block);
  int ReadIntBlock(int n, int *block);
  void ReadXYZCoords(vtkFloatArray *coords);
  void ReadBinaryCellTopology(vtkIntArray *material, int *types, 
                              vtkIdTypeArray *listcells);
  void ReadASCIICellTopology(vtkIntArray *material, vtkUnstructuredGrid *output);

  vtkAVSucdReader(const vtkAVSucdReader&);  // Not implemented.
  void operator=(const vtkAVSucdReader&);  // Not implemented.
};

#endif

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