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85 lines
2.5 KiB
85 lines
2.5 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkGenericPointIterator.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkGenericPointIterator - iterator used to traverse points
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// .SECTION Description
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// This class (and subclasses) are used to iterate over points. Use it
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// only in conjunction with vtkGenericDataSet (i.e., the adaptor framework).
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//
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// Typical use is:
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// <pre>
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// vtkGenericDataSet *dataset;
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// vtkGenericPointIterator *it = dataset->NewPointIterator();
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// for (it->Begin(); !it->IsAtEnd(); it->Next());
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// {
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// x=it->GetPosition();
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// }
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// </pre>
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#ifndef __vtkGenericPointIterator_h
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#define __vtkGenericPointIterator_h
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#include "vtkObject.h"
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class VTK_FILTERING_EXPORT vtkGenericPointIterator : public vtkObject
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{
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public:
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// Description:
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// Standard VTK construction and type macros.
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vtkTypeRevisionMacro(vtkGenericPointIterator,vtkObject);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Move iterator to first position if any (loop initialization).
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virtual void Begin() = 0;
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// Description:
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// Is the iterator at the end of traversal?
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virtual int IsAtEnd() = 0;
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// Description:
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// Move the iterator to the next position in the list.
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// \pre not_off: !IsAtEnd()
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virtual void Next() = 0;
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// Description:
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// Get the coordinates of the point at the current iterator position.
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// \pre not_off: !IsAtEnd()
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// \post result_exists: result!=0
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virtual double *GetPosition() = 0;
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// Description:
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// Get the coordinates of the point at the current iterator position.
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// \pre not_off: !IsAtEnd()
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// \pre x_exists: x!=0
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virtual void GetPosition(double x[3]) = 0;
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// Description:
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// Return the unique identifier for the point, could be non-contiguous.
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// \pre not_off: !IsAtEnd()
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virtual vtkIdType GetId() = 0;
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protected:
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// Description:
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// Destructor.
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vtkGenericPointIterator();
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virtual ~vtkGenericPointIterator();
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private:
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vtkGenericPointIterator(const vtkGenericPointIterator&); // Not implemented.
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void operator=(const vtkGenericPointIterator&); // Not implemented.
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};
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#endif
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