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vtkXMLUnstructuredDataReader.h

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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 =========================================================================*/
00029 #ifndef __vtkXMLUnstructuredDataReader_h
00030 #define __vtkXMLUnstructuredDataReader_h
00031 
00032 #include "vtkXMLDataReader.h"
00033 
00034 class vtkCellArray;
00035 class vtkIdTypeArray;
00036 class vtkPointSet;
00037 class vtkUnsignedCharArray;
00038 
00039 class VTK_IO_EXPORT vtkXMLUnstructuredDataReader : public vtkXMLDataReader
00040 {
00041 public:
00042   vtkTypeRevisionMacro(vtkXMLUnstructuredDataReader,vtkXMLDataReader);
00043   void PrintSelf(ostream& os, vtkIndent indent);  
00044   
00046   virtual vtkIdType GetNumberOfPoints();
00047   
00049   virtual vtkIdType GetNumberOfCells();
00050   
00055   void SetupUpdateExtent(int piece, int numberOfPieces, int ghostLevel);
00056   
00057 protected:
00058   vtkXMLUnstructuredDataReader();
00059   ~vtkXMLUnstructuredDataReader();
00060   
00061   vtkPointSet* GetOutputAsPointSet();
00062   vtkXMLDataElement* FindDataArrayWithName(vtkXMLDataElement* eParent,
00063                                            const char* name);
00064   vtkIdTypeArray* ConvertToIdTypeArray(vtkDataArray* a);
00065   vtkUnsignedCharArray* ConvertToUnsignedCharArray(vtkDataArray* a);
00066   
00067   // Pipeline execute data driver.  Called by vtkXMLReader.
00068   void ReadXMLData();
00069   
00070   virtual void SetupEmptyOutput();
00071   virtual void GetOutputUpdateExtent(int& piece, int& numberOfPieces,
00072                                      int& ghostLevel)=0;
00073   virtual void SetupOutputTotals();
00074   virtual void SetupNextPiece();
00075   void SetupPieces(int numPieces);
00076   void DestroyPieces();
00077   
00078   void SetupOutputInformation();
00079   void SetupOutputData();
00080   int ReadPiece(vtkXMLDataElement* ePiece);
00081   int ReadPieceData();
00082   int ReadCellArray(vtkIdType numberOfCells, vtkIdType totalNumberOfCells,
00083                     vtkXMLDataElement* eCells, vtkCellArray* outCells);
00084   
00085   // Read a data array whose tuples coorrespond to points.
00086   int ReadArrayForPoints(vtkXMLDataElement* da, vtkDataArray* outArray);
00087   
00088   // The update request.
00089   int UpdatePiece;
00090   int UpdateNumberOfPieces;
00091   int UpdateGhostLevel;
00092   
00093   // The range of pieces from the file that will form the UpdatePiece.
00094   int StartPiece;
00095   int EndPiece;
00096   vtkIdType TotalNumberOfPoints;
00097   vtkIdType TotalNumberOfCells;
00098   vtkIdType StartPoint;
00099   
00100   // The Points element for each piece.
00101   vtkXMLDataElement** PointElements;
00102   vtkIdType* NumberOfPoints;
00103   
00104 private:
00105   vtkXMLUnstructuredDataReader(const vtkXMLUnstructuredDataReader&);  // Not implemented.
00106   void operator=(const vtkXMLUnstructuredDataReader&);  // Not implemented.
00107 };
00108 
00109 #endif