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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkHyperTreeGridExtractGhostCells
* @brief Extract ghost cells from the input HTG and untag them as ghost
*
* In practice, the input HTG is shallow copied, and every cell is masked unless it is ghost.
* Coarse cells are shown if any of their leaves is ghost.
*
* The input ghost cell array is renamed and no longer considered as a ghost type array.
*
* @sa vtkHyperTreeGridRemoveGhostCells
*/
#ifndef vtkHyperTreeGridExtractGhostCells_h
#define vtkHyperTreeGridExtractGhostCells_h
#include "vtkFiltersHyperTreeModule.h" // For export macro
#include "vtkHyperTreeGridAlgorithm.h"
#include "vtkNew.h" // To instantiate the mask array
VTK_ABI_NAMESPACE_BEGIN
class vtkBitArray;
class vtkUnsignedCharArray;
class vtkHyperTreeGridNonOrientedCursor;
class VTKFILTERSHYPERTREE_EXPORT vtkHyperTreeGridExtractGhostCells
: public vtkHyperTreeGridAlgorithm
{
public:
static vtkHyperTreeGridExtractGhostCells* New();
vtkTypeMacro(vtkHyperTreeGridExtractGhostCells, vtkHyperTreeGridAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Set / Get the name of the ghost cell array in the output.
*/
vtkSetStringMacro(OutputGhostArrayName);
vtkGetStringMacro(OutputGhostArrayName);
///@}
protected:
vtkHyperTreeGridExtractGhostCells();
~vtkHyperTreeGridExtractGhostCells() override = default;
/**
* Main routine to hide or show cells based on their ghost type
*/
int ProcessTrees(vtkHyperTreeGrid*, vtkDataObject*) override;
/**
* Recursively process the tree to mask non-ghost cells.
* Return true if at least one leaf if ghost.
*/
bool RecursivelyMaskNonGhost(vtkHyperTreeGridNonOrientedCursor*);
private:
char* OutputGhostArrayName = nullptr;
vtkNew<vtkBitArray> OutMask;
vtkBitArray* InMask = nullptr;
vtkUnsignedCharArray* InGhost = nullptr;
vtkHyperTreeGridExtractGhostCells(const vtkHyperTreeGridExtractGhostCells&) = delete;
void operator=(const vtkHyperTreeGridExtractGhostCells&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif /* vtkHyperTreeGridExtractGhostCells */
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