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IO/vtkXMLUnstructuredDataReader.h

00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkXMLUnstructuredDataReader.h,v $
00005   Language:  C++
00006 
00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
00008   All rights reserved.
00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00010 
00011      This software is distributed WITHOUT ANY WARRANTY; without even 
00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00013      PURPOSE.  See the above copyright notice for more information.
00014 
00015 =========================================================================*/
00039 #ifndef __vtkXMLUnstructuredDataReader_h
00040 #define __vtkXMLUnstructuredDataReader_h
00041 
00042 #include "vtkXMLDataReader.h"
00043 
00044 class vtkCellArray;
00045 class vtkIdTypeArray;
00046 class vtkPointSet;
00047 class vtkUnsignedCharArray;
00048 
00049 class VTK_IO_EXPORT vtkXMLUnstructuredDataReader : public vtkXMLDataReader
00050 {
00051 public:
00052   vtkTypeRevisionMacro(vtkXMLUnstructuredDataReader,vtkXMLDataReader);
00053   void PrintSelf(ostream& os, vtkIndent indent);  
00054   
00056   virtual vtkIdType GetNumberOfPoints();
00057   
00059   virtual vtkIdType GetNumberOfCells();
00060   
00065   void SetupUpdateExtent(int piece, int numberOfPieces, int ghostLevel);
00066   
00067 protected:
00068   vtkXMLUnstructuredDataReader();
00069   ~vtkXMLUnstructuredDataReader();
00070   
00071   vtkPointSet* GetOutputAsPointSet();
00072   vtkXMLDataElement* FindDataArrayWithName(vtkXMLDataElement* eParent,
00073                                            const char* name);
00074   vtkIdTypeArray* ConvertToIdTypeArray(vtkDataArray* a);
00075   vtkUnsignedCharArray* ConvertToUnsignedCharArray(vtkDataArray* a);
00076   
00077   // Pipeline execute data driver.  Called by vtkXMLReader.
00078   void ReadXMLData();
00079   
00080   virtual void SetupEmptyOutput();
00081   virtual void GetOutputUpdateExtent(int& piece, int& numberOfPieces,
00082                                      int& ghostLevel)=0;
00083   virtual void SetupOutputTotals();
00084   virtual void SetupNextPiece();
00085   void SetupPieces(int numPieces);
00086   void DestroyPieces();
00087   
00088   void SetupOutputInformation();
00089   void SetupOutputData();
00090   int ReadPiece(vtkXMLDataElement* ePiece);
00091   int ReadPieceData();
00092   int ReadCellArray(vtkIdType numberOfCells, vtkIdType totalNumberOfCells,
00093                     vtkXMLDataElement* eCells, vtkCellArray* outCells);
00094   
00095   // Read a data array whose tuples coorrespond to points.
00096   int ReadArrayForPoints(vtkXMLDataElement* da, vtkDataArray* outArray);
00097   
00098   // The update request.
00099   int UpdatePiece;
00100   int UpdateNumberOfPieces;
00101   int UpdateGhostLevel;
00102   
00103   // The range of pieces from the file that will form the UpdatePiece.
00104   int StartPiece;
00105   int EndPiece;
00106   vtkIdType TotalNumberOfPoints;
00107   vtkIdType TotalNumberOfCells;
00108   vtkIdType StartPoint;
00109   
00110   // The Points element for each piece.
00111   vtkXMLDataElement** PointElements;
00112   vtkIdType* NumberOfPoints;
00113   
00114 private:
00115   vtkXMLUnstructuredDataReader(const vtkXMLUnstructuredDataReader&);  // Not implemented.
00116   void operator=(const vtkXMLUnstructuredDataReader&);  // Not implemented.
00117 };
00118 
00119 #endif