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vtkImageIterateFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkImageIterateFilter.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 =========================================================================*/
00030 #ifndef __vtkImageIterateFilter_h
00031 #define __vtkImageIterateFilter_h
00032 
00033 
00034 #include "vtkImageToImageFilter.h"
00035 
00036 class VTK_IMAGING_EXPORT vtkImageIterateFilter : public vtkImageToImageFilter
00037 {
00038 public:
00039   vtkTypeRevisionMacro(vtkImageIterateFilter,vtkImageToImageFilter);
00040   void PrintSelf(ostream& os, vtkIndent indent);
00041 
00043 
00045   vtkGetMacro(Iteration,int);
00046   vtkGetMacro(NumberOfIterations,int);  
00048 
00049   void ComputeInputUpdateExtents( vtkDataObject *output );
00050   //BTX
00051   void ComputeInputUpdateExtent( int [6], int [6] )
00052     { vtkErrorMacro( << "ComputeInputUpdateExtent should be implemented in subclass" );};
00053   //ETX
00054 
00055 protected:
00056   vtkImageIterateFilter();
00057   ~vtkImageIterateFilter();
00058 
00059   // Superclass API. Sets defaults, then calls 
00060   // ExecuteInformation(vtkImageData *inData, vtkImageData *outData)
00061   // for each iteration
00062   void ExecuteInformation();
00063   // Called for each iteration (differs from superclass in arguments).
00064   // You should override this method if needed.
00065   virtual void ExecuteInformation(vtkImageData *inData, vtkImageData *outData);
00066   
00067   // Superclass API: Calls Execute(vtkImageData *inData, vtkImageData *outData)
00068   // for each iteration.
00069   void ExecuteData(vtkDataObject *output);
00070   virtual void IterativeExecuteData(vtkImageData *in, vtkImageData *out) = 0;
00071   
00072   // Replaces "EnlargeOutputUpdateExtent"
00073   virtual void AllocateOutputScalars(vtkImageData *outData);
00074   
00075   // Allows subclass to specify the number of iterations  
00076   virtual void SetNumberOfIterations(int num);
00077   
00078   // for filters that execute multiple times.
00079   int NumberOfIterations;
00080   int Iteration;
00081   // A list of intermediate caches that is created when 
00082   // is called SetNumberOfIterations()
00083   vtkImageData **IterationData;
00084   
00085   // returns correct vtkImageDatas based on current iteration.
00086   vtkImageData *GetIterationInput();
00087   vtkImageData *GetIterationOutput();
00088 private:
00089   vtkImageIterateFilter(const vtkImageIterateFilter&);  // Not implemented.
00090   void operator=(const vtkImageIterateFilter&);  // Not implemented.
00091 };
00092 
00093 #endif
00094 
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