vtkAppendPolyData.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkAppendPolyData_h
#define vtkAppendPolyData_h

#include "vtkFiltersCoreModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
#include "vtkWrappingHints.h" // For VTK_MARSHALAUTO

VTK_ABI_NAMESPACE_BEGIN
class vtkCellArray;
class vtkDataArray;
class vtkPoints;
class vtkPolyData;

class VTKFILTERSCORE_EXPORT VTK_MARSHALAUTO vtkAppendPolyData : public vtkPolyDataAlgorithm
{
public:
  static vtkAppendPolyData* New();

  vtkTypeMacro(vtkAppendPolyData, vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkSetMacro(UserManagedInputs, vtkTypeBool);
  vtkGetMacro(UserManagedInputs, vtkTypeBool);
  vtkBooleanMacro(UserManagedInputs, vtkTypeBool);


  vtkGetMacro(UseImplicitArray, bool);
  vtkSetMacro(UseImplicitArray, bool);
  vtkBooleanMacro(UseImplicitArray, bool);

  void AddInputData(vtkPolyData*);

  void RemoveInputData(vtkPolyData*);


  vtkPolyData* GetInput(int idx);
  vtkPolyData* GetInput() { return this->GetInput(0); }

  void SetNumberOfInputs(int num);

  // Set Nth input, should only be used when UserManagedInputs is true.
  void SetInputConnectionByNumber(int num, vtkAlgorithmOutput* input);
  void SetInputDataByNumber(int num, vtkPolyData* ds);


  vtkSetMacro(ParallelStreaming, vtkTypeBool);
  vtkGetMacro(ParallelStreaming, vtkTypeBool);
  vtkBooleanMacro(ParallelStreaming, vtkTypeBool);


  vtkSetMacro(OutputPointsPrecision, int);
  vtkGetMacro(OutputPointsPrecision, int);

  int ExecuteAppend(vtkPolyData* output, vtkPolyData* inputs[], int numInputs)
    VTK_SIZEHINT(inputs, numInputs);

  struct PolyDataOffsets
  {
    PolyDataOffsets(const std::vector<vtkPolyData*>& datasets);

    vtkIdType TotalNumberOfPoints = 0;
    vtkIdType TotalNumberOfCells = 0;
    vtkIdType TotalNumberOfVerts = 0;
    vtkIdType TotalNumberOfVertsConnectivity = 0;
    vtkIdType TotalNumberOfLines = 0;
    vtkIdType TotalNumberOfLinesConnectivity = 0;
    vtkIdType TotalNumberOfPolys = 0;
    vtkIdType TotalNumberOfPolysConnectivity = 0;
    vtkIdType TotalNumberOfStrips = 0;
    vtkIdType TotalNumberOfStripsConnectivity = 0;
    std::vector<vtkIdType> PointOffsets;
    std::vector<vtkIdType> VertOffsets;
    std::vector<vtkIdType> VertConnectivityOffsets;
    std::vector<vtkIdType> LineOffsets;
    std::vector<vtkIdType> LineConnectivityOffsets;
    std::vector<vtkIdType> PolyOffsets;
    std::vector<vtkIdType> PolyConnectivityOffsets;
    std::vector<vtkIdType> StripOffsets;
    std::vector<vtkIdType> StripConnectivityOffsets;
  };

  static void AppendCellData(const PolyDataOffsets& stats, const std::vector<vtkPolyData*>& inputs,
    vtkPolyData* output, bool useImplicit);

protected:
  vtkAppendPolyData();
  ~vtkAppendPolyData() override;

  // Flag for selecting parallel streaming behavior
  vtkTypeBool ParallelStreaming;
  int OutputPointsPrecision;

  // Usual data generation method
  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
  int RequestUpdateExtent(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
  int FillInputPortInformation(int, vtkInformation*) override;

private:
  // hide the superclass' AddInput() from the user and the compiler
  void AddInputData(vtkDataObject*)
  {
    vtkErrorMacro(<< "AddInput() must be called with a vtkPolyData not a vtkDataObject.");
  }

  void AppendPoints(
    const PolyDataOffsets& stats, const std::vector<vtkPolyData*>& inputs, vtkPolyData* output);

  void AppendCells(
    const PolyDataOffsets& stats, const std::vector<vtkPolyData*>& inputs, vtkPolyData* output);

  vtkTypeBool UserManagedInputs;

  bool UseImplicitArray = false;

  vtkAppendPolyData(const vtkAppendPolyData&) = delete;
  void operator=(const vtkAppendPolyData&) = delete;
};

VTK_ABI_NAMESPACE_END
#endif