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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright (c) Sandia Corporation
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkExtractUserDefinedPiece
* @brief Return user specified piece with ghost cells
*
*
* Provided a function that determines which cells are zero-level
* cells ("the piece"), this class outputs the piece with the
* requested number of ghost levels. The only difference between
* this class and the class it is derived from is that the
* zero-level cells are specified by a function you provide,
* instead of determined by dividing up the cells based on cell Id.
*
* @sa
* vtkExtractUnstructuredGridPiece
*/
#ifndef vtkExtractUserDefinedPiece_h
#define vtkExtractUserDefinedPiece_h
#include "vtkExtractUnstructuredGridPiece.h"
#include "vtkFiltersParallelModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class VTKFILTERSPARALLEL_EXPORT vtkExtractUserDefinedPiece : public vtkExtractUnstructuredGridPiece
{
public:
vtkTypeMacro(vtkExtractUserDefinedPiece, vtkExtractUnstructuredGridPiece);
static vtkExtractUserDefinedPiece* New();
void PrintSelf(ostream& os, vtkIndent indent) override;
typedef int (*UserDefFunc)(vtkIdType cellID, vtkUnstructuredGrid* grid, void* constantData);
// Set the function used to identify the piece. The function should
// return 1 if the cell is in the piece, and 0 otherwise.
void SetPieceFunction(UserDefFunc func)
{
this->InPiece = func;
this->Modified();
}
// Set constant data to be used by the piece identifying function.
void SetConstantData(void* data, int len);
// Get constant data to be used by the piece identifying function.
// Return the length of the data buffer.
int GetConstantData(void** data);
// The function should return 1 if the cell
// is in the piece, and 0 otherwise.
protected:
vtkExtractUserDefinedPiece();
~vtkExtractUserDefinedPiece() override;
int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
void ComputeCellTagsWithFunction(
vtkIntArray* tags, vtkIdList* pointOwnership, vtkUnstructuredGrid* input);
private:
vtkExtractUserDefinedPiece(const vtkExtractUserDefinedPiece&) = delete;
void operator=(const vtkExtractUserDefinedPiece&) = delete;
void* ConstantData;
int ConstantDataLen;
UserDefFunc InPiece;
};
VTK_ABI_NAMESPACE_END
#endif
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