libvtk6-dev 6.3.0+dfsg1-11build1 / usr / include / vtk-6.3 / vtkXMLUniformGridAMRReader.h

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

  Program:   ParaView
  Module:    vtkXMLUniformGridAMRReader.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html 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 vtkXMLUniformGridAMRReader - Reader for amr datasets (vtkOverlappingAMR
// or vtkNonOverlappingAMR).
// .SECTION Description
// vtkXMLUniformGridAMRReader reads the VTK XML data files for all types of amr
// datasets including vtkOverlappingAMR, vtkNonOverlappingAMR and the legacy
// vtkHierarchicalBoxDataSet. The reader uses information in the file to
// determine what type of dataset is actually being read and creates the
// output-data object accordingly.
//
// This reader can only read files with version 1.1 or greater.
// Older versions can be converted to the newer versions using
// vtkXMLHierarchicalBoxDataFileConverter.

#ifndef vtkXMLUniformGridAMRReader_h
#define vtkXMLUniformGridAMRReader_h

#include "vtkIOXMLModule.h" // For export macro
#include "vtkXMLCompositeDataReader.h"
#include "vtkSmartPointer.h" // needed for vtkSmartPointer.

class vtkOverlappingAMR;
class vtkUniformGridAMR;

class VTKIOXML_EXPORT vtkXMLUniformGridAMRReader :
  public vtkXMLCompositeDataReader
{
public:
  static vtkXMLUniformGridAMRReader* New();
  vtkTypeMacro(vtkXMLUniformGridAMRReader,vtkXMLCompositeDataReader);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // This reader supports demand-driven heavy data reading i.e. downstream
  // pipeline can request specific blocks from the AMR using
  // vtkCompositeDataPipeline::UPDATE_COMPOSITE_INDICES() key in
  // RequestUpdateExtent() pass. However, when down-stream doesn't provide any
  // specific keys, the default behavior can be setup to read at-most N levels
  // by default. The number of levels read can be set using this method.
  // Set this to 0 to imply no limit. Default is 0.
  vtkSetMacro(MaximumLevelsToReadByDefault, unsigned int);
  vtkGetMacro(MaximumLevelsToReadByDefault, unsigned int);

protected:
  vtkXMLUniformGridAMRReader();
  ~vtkXMLUniformGridAMRReader();

  // Description:
  // This method is used by CanReadFile() to check if the reader can read an XML
  // with the primary element with the given name. Default implementation
  // compares the name with the text returned by this->GetDataSetName().
  // Overridden to support all AMR types.
  virtual int CanReadFileWithDataType(const char* dsname);

  // Description:
  // Read the top-level element from the file.  This is always the
  // VTKFile element.
  // Overridden to read the "type" information specified in the XML. The "type"
  // attribute helps us identify the output data type.
  virtual int ReadVTKFile(vtkXMLDataElement* eVTKFile);

  // Description:
  // Read the meta-data from the AMR from the file. Note that since
  // ReadPrimaryElement() is only called when the filename changes, we are
  // technically not supporting time-varying AMR datasets in this format right
  // now.
  virtual int ReadPrimaryElement(vtkXMLDataElement* ePrimary);

  // Description:
  // Overridden to create an output data object based on the type in the file.
  // Since this reader can handle all subclasses of vtkUniformGrid, we need to
  // check in the file to decide what type to create.
  virtual int RequestDataObject(vtkInformation *request,
    vtkInformationVector **inputVector, vtkInformationVector *outputVector);

  // Description:
  // Overridden to put vtkOverlappingAMR in the pipeline if
  // available/applicable.
  virtual int RequestInformation(vtkInformation *request,
    vtkInformationVector **inputVector, vtkInformationVector *outputVector);

  // Get the name of the data set being read.
  virtual const char* GetDataSetName();

  // Read the XML element for the subtree of a the composite dataset.
  // dataSetIndex is used to rank the leaf nodes in an inorder traversal.
  virtual void ReadComposite(vtkXMLDataElement* element,
    vtkCompositeDataSet* composite, const char* filePath,
    unsigned int &dataSetIndex);

  // Read the vtkDataSet (a leaf) in the composite dataset.
  virtual vtkDataSet* ReadDataset(vtkXMLDataElement* xmlElem, const char* filePath);

  vtkSmartPointer<vtkOverlappingAMR> Metadata;
  unsigned int MaximumLevelsToReadByDefault;

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

  char* OutputDataType;
  vtkSetStringMacro(OutputDataType);
};

#endif

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