vtkContourHelper.h

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

#include "vtkCellArray.h"         // For complete type required by vtkNew
#include "vtkCellData.h"          // For complete type required by vtkNew
#include "vtkDeprecation.h"       // For VTK_DEPRECATED_IN_9_7_0
#include "vtkFiltersCoreModule.h" // For export macro
#include "vtkWeakPointer.h"       // For vtkWeakPointer
#include "vtkWrappingHints.h"     // For VTK_MARSHALAUTO

VTK_ABI_NAMESPACE_BEGIN
class vtkIncrementalPointLocator;
class vtkCellArray;
class vtkPointData;
class vtkCellData;
class vtkCell;
class vtkDataArray;

class VTKFILTERSCORE_EXPORT VTK_MARSHALAUTO vtkContourHelper
{
public:
  VTK_DEPRECATED_IN_9_7_0(
    "Use vtkContourHelper(vtkIncrementalPointLocator*, vtkCellArray*, vtkCellArray*, "
    "vtkCellArray*, vtkPointData*, vtkCellData*, vtkPointData*, vtkCellData*, bool) instead.")
  vtkContourHelper(vtkIncrementalPointLocator* locator, vtkCellArray* outVerts,
    vtkCellArray* outLines, vtkCellArray* outPolys, vtkPointData* inPd, vtkCellData* inCd,
    vtkPointData* outPd, vtkCellData* outCd, int trisEstimatedSize, bool outputTriangles);

  vtkContourHelper(vtkIncrementalPointLocator* locator, vtkCellArray* outVerts,
    vtkCellArray* outLines, vtkCellArray* outPolys, vtkPointData* inPd, vtkCellData* inCd,
    vtkPointData* outPd, vtkCellData* outCd, bool outputTriangles);
  ~vtkContourHelper() = default;

  void Contour(vtkCell* cell, double value, vtkDataArray* cellScalars, vtkIdType cellId);

private:
  vtkContourHelper(const vtkContourHelper&) = delete;
  vtkContourHelper& operator=(const vtkContourHelper&) = delete;

  void InitializeTempContainers();

  // Filled upon construction
  vtkWeakPointer<vtkIncrementalPointLocator> Locator;
  vtkWeakPointer<vtkCellArray> OutVerts;
  vtkWeakPointer<vtkCellArray> OutLines;
  vtkWeakPointer<vtkCellArray> OutPolys;
  vtkWeakPointer<vtkPointData> InPd;
  vtkWeakPointer<vtkCellData> InCd;
  vtkWeakPointer<vtkPointData> OutPd;
  vtkWeakPointer<vtkCellData> OutCd;
  bool OutputTriangles = false;

  // Temporary containers reused per helper instance.
  vtkNew<vtkCellArray> TempTris;
  vtkNew<vtkCellData> TempTriData;
  bool TempContainersInitialized = false;
};

VTK_ABI_NAMESPACE_END
#endif
// VTK-HeaderTest-Exclude: vtkContourHelper.h