vtkAVSucdReader.h

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

  Program:   Visualization Toolkit
  Module:    vtkAVSucdReader.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.

=========================================================================*/
#ifndef vtkAVSucdReader_h
#define vtkAVSucdReader_h

#include "vtkIOGeometryModule.h" // For export macro
#include "vtkUnstructuredGridAlgorithm.h"

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

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


  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);


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


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

  char *FileName;
  vtkTypeBool BinaryFile;

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

  ifstream *FileStream;

  vtkDataArraySelection* PointDataArraySelection;
  vtkDataArraySelection* CellDataArraySelection;

  int ByteOrder;
  int GetLabel(char *string, int number, char *label);

  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)
  };

  DataInfo *NodeDataInfo;
  DataInfo *CellDataInfo;

private:
  struct idMapping;

  void ReadFile(vtkUnstructuredGrid *output);
  void ReadGeometry(vtkUnstructuredGrid *output,
                    idMapping& nodeMap,
                    idMapping& cellMap);
  void ReadNodeData(vtkUnstructuredGrid *output, const idMapping& nodeMap);
  void ReadCellData(vtkUnstructuredGrid *output, const idMapping& cellMap);

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

  vtkAVSucdReader(const vtkAVSucdReader&) = delete;
  void operator=(const vtkAVSucdReader&) = delete;
};

#endif