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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkExplodeDataSet
* @brief Explode input dataset according to a cell scalar isovalue criteria.
*
* vtkExplodeDataSet creates a vtkPartitionedDataSetCollection containing
* isovalue partitions: each partition of the output contains cells that share
* the same value for the given cell array.
*
* Output is a vtkPartitionedDataSetCollection where leaves are vtkUnstructuredGrid,
* unless input is a vtkPolyData, then leaves stay vtkPolyData.
*
* PointData and CellData are forwarded accordingly.
*
* It is similar to a vtkMultiThreshold, configured to extract every single
* value of the input array.
*
* It comes in replacement of vtkSplitByCellScalarFilter to use
* vtkPartitionedDataSetCollection instead of vtkMultiBlockDataSet as output.
* Also, vtkExplodeDataSet relies internally on vtkExtractCells to generate
* output datasets. This benefits from SMPTools threading acceleration.
*
* @sa vtkExtractCells, vtkMultiThreshold
*/
#ifndef vtkExplodeDataSet_h
#define vtkExplodeDataSet_h
#include "vtkFiltersGeneralModule.h" // For export macro
#include "vtkPartitionedDataSetCollectionAlgorithm.h"
VTK_ABI_NAMESPACE_BEGIN
class vtkDataSet;
class vtkIdList;
class vtkPointSet;
class VTKFILTERSGENERAL_EXPORT vtkExplodeDataSet : public vtkPartitionedDataSetCollectionAlgorithm
{
public:
static vtkExplodeDataSet* New();
vtkTypeMacro(vtkExplodeDataSet, vtkPartitionedDataSetCollectionAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
protected:
vtkExplodeDataSet();
~vtkExplodeDataSet() override = default;
int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
/**
* Accepts vtkDataSet as input.
*/
int FillInputPortInformation(int port, vtkInformation* info) override;
private:
vtkExplodeDataSet(const vtkExplodeDataSet&) = delete;
void operator=(const vtkExplodeDataSet&) = delete;
/**
* Fill the idsByValue map: for each value in scalars, list all of input cells that
* matches this value.
*/
std::map<double, vtkSmartPointer<vtkIdList>> GetIdListsByValue(vtkDataArray* scalars);
/**
* Create a partition from input cells and given points.
* If input is a vtkPolyData, returns a vtkPolyData. Otherwise returns a vtkUnstructuredGrid.
* Caller is responsible for deletion.
*/
vtkPointSet* CreatePartition(vtkDataSet* input, vtkIdList* partCellIds);
};
VTK_ABI_NAMESPACE_END
#endif
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