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