paraview-dev 5.0.1+dfsg1-4 / usr / include / paraview / vtkPNetCDFPOPReader.h

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

  Program:   Visualization Toolkit
  Module:    vtPkNetCDFPOPReader.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 vtkPNetCDFPOPReader - read NetCDF files in parallel with MPI
// .Author Ross Miller 03.14.2011
// .SECTION Description
// vtkNetCDFPOPReader is a source object that reads NetCDF files.
// It should be able to read most any NetCDF file that wants to output a
// rectilinear grid.  The ordering of the variables is changed such that
// the NetCDF x, y, z directions correspond to the vtkRectilinearGrid
// z, y, x directions, respectively.  The striding is done with
// respect to the vtkRectilinearGrid ordering.  Additionally, the
// z coordinates of the vtkRectilinearGrid are negated so that the
// first slice/plane has the highest z-value and the last slice/plane
// has the lowest z-value.

#ifndef vtkPNetCDFPOPReader_h
#define vtkPNetCDFPOPReader_h

#include "vtkIOParallelNetCDFModule.h" // For export macro
#include "vtkRectilinearGridAlgorithm.h"

class vtkDataArraySelection;
class vtkCallbackCommand;
class vtkMPIController;
class vtkPNetCDFPOPReaderInternal;

class VTKIOPARALLELNETCDF_EXPORT vtkPNetCDFPOPReader : public vtkRectilinearGridAlgorithm
{
public:
  vtkTypeMacro(vtkPNetCDFPOPReader,vtkRectilinearGridAlgorithm);
  static vtkPNetCDFPOPReader *New();
  void PrintSelf(ostream& os, vtkIndent indent);

  //Description:
  //The file to open
  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);

  //Description:
  //Enable subsampling in i,j and k dimensions in the vtkRectilinearGrid
  vtkSetVector3Macro(Stride, int);
  vtkGetVector3Macro(Stride, int);

  // Description:
  // Variable array selection.
  virtual int GetNumberOfVariableArrays();
  virtual const char *GetVariableArrayName(int idx);
  virtual int GetVariableArrayStatus(const char *name);
  virtual void SetVariableArrayStatus(const char *name, int status);

  // Description:
  // Set ranks that will actually open and read the netCDF files.  Pass in
  // null to chose reasonable defaults)
  void SetReaderRanks(vtkIdList*);

  // Set/Get the vtkMultiProcessController which will handle communications
  // for the parallel rendering.
  vtkGetObjectMacro(Controller, vtkMPIController);
  void SetController(vtkMPIController *controller);

protected:
  vtkPNetCDFPOPReader();
  ~vtkPNetCDFPOPReader();

  int RequestData(vtkInformation*,vtkInformationVector**,
                  vtkInformationVector*);
  virtual int RequestInformation(vtkInformation* request,
                                 vtkInformationVector** inputVector,
                                 vtkInformationVector* outputVector);

  // Helper function for RequestData:  Reads part of the netCDF
  // file and sends sub-arrays to all ranks that need that data
  int ReadAndSend( vtkInformation* outInfo, int varID);

  // Returns the MPI rank of the process that should read the specified depth
  int ReaderForDepth( unsigned depth);

  bool IsReaderRank();
  bool IsFirstReaderRank();

  static void SelectionModifiedCallback(vtkObject *caller, unsigned long eid,
                                        void *clientdata, void *calldata);

  static void EventCallback(vtkObject* caller, unsigned long eid,
                            void* clientdata, void* calldata);

  vtkCallbackCommand* SelectionObserver;

  char *FileName;
  char *OpenedFileName;
  vtkSetStringMacro(OpenedFileName);

  int NCDFFD; //netcdf file descriptor

  int Stride[3];

  vtkMPIController *Controller;

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

  vtkPNetCDFPOPReaderInternal* Internals;
};
#endif

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