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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkGenericPointIterator
* @brief iterator used to traverse points
*
* 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 "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"
VTK_ABI_NAMESPACE_BEGIN
class VTKCOMMONDATAMODEL_EXPORT vtkGenericPointIterator : public vtkObject
{
public:
///@{
/**
* Standard VTK construction and type macros.
*/
vtkTypeMacro(vtkGenericPointIterator, vtkObject);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@}
/**
* Move iterator to first position if any (loop initialization).
*/
virtual void Begin() = 0;
/**
* Is the iterator at the end of traversal?
*/
virtual vtkTypeBool IsAtEnd() = 0;
/**
* Move the iterator to the next position in the list.
* \pre not_off: !IsAtEnd()
*/
virtual void Next() = 0;
/**
* Get the coordinates of the point at the current iterator position.
* \pre not_off: !IsAtEnd()
* \post result_exists: result!=0
*/
virtual double* GetPosition() = 0;
/**
* 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;
/**
* Return the unique identifier for the point, could be non-contiguous.
* \pre not_off: !IsAtEnd()
*/
virtual vtkIdType GetId() = 0;
protected:
///@{
/**
* Destructor.
*/
vtkGenericPointIterator();
~vtkGenericPointIterator() override;
///@}
private:
vtkGenericPointIterator(const vtkGenericPointIterator&) = delete;
void operator=(const vtkGenericPointIterator&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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