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vtkImageIterator.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkImageIterator.h,v $
00005 
00006   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
00007   All rights reserved.
00008   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00039 #ifndef __vtkImageIterator_h
00040 #define __vtkImageIterator_h
00041 
00042 #include "vtkSystemIncludes.h"
00043 class vtkImageData;
00044 
00045 template<class DType>
00046 class vtkImageIterator 
00047 {
00048 public:        
00049   typedef DType *SpanIterator;
00050   
00052   vtkImageIterator(vtkImageData *id, int *ext);
00053 
00055   void NextSpan();
00056 
00058 
00059   SpanIterator BeginSpan()
00060     {
00061       return this->Pointer;
00062     }
00064 
00066 
00067   SpanIterator EndSpan()
00068     {
00069       return this->SpanEndPointer;
00070     }
00072     
00074 
00075   int IsAtEnd()
00076     {
00077     return (this->Pointer >= this->EndPointer);
00078     }
00080 
00081 protected:
00082   DType *Pointer;
00083   DType *SpanEndPointer;
00084   DType *SliceEndPointer;
00085   DType *EndPointer;
00086   int    Increments[3];
00087   int    ContinuousIncrements[3];
00088 };
00089 
00090 #ifdef VTK_NO_EXPLICIT_TEMPLATE_INSTANTIATION
00091 #include "vtkImageIterator.txx"
00092 #endif 
00093 
00094 #endif