vtkClosestPointStrategy.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkClosestPointStrategy.h
 
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef vtkClosestPointStrategy_h
#define vtkClosestPointStrategy_h
 
#include "vtkCell.h"                  //inline SelectCell
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkFindCellStrategy.h"
#include "vtkGenericCell.h" //inline SelectCell
#include "vtkPointSet.h"    //inline SelectCell
 
#include <set> // For tracking visited cells
 
class vtkIdList;
class vtkAbstractPointLocator;
 
class VTKCOMMONDATAMODEL_EXPORT vtkClosestPointStrategy : public vtkFindCellStrategy
{
public:
  static vtkClosestPointStrategy* New();
 
 
  vtkTypeMacro(vtkClosestPointStrategy, vtkFindCellStrategy);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  int Initialize(vtkPointSet* ps) override;
 
  vtkIdType FindCell(double x[3], vtkCell* cell, vtkGenericCell* gencell, vtkIdType cellId,
    double tol2, int& subId, double pcoords[3], double* weights) override;
 
 
  virtual void SetPointLocator(vtkAbstractPointLocator*);
  vtkGetObjectMacro(PointLocator, vtkAbstractPointLocator);
 
  vtkCell* SelectCell(vtkPointSet* self, vtkIdType cellId, vtkCell* cell, vtkGenericCell* gencell);
 
protected:
  vtkClosestPointStrategy();
  ~vtkClosestPointStrategy() override;
 
  std::set<vtkIdType> VisitedCells;
  vtkIdList* PointIds;
  vtkIdList* Neighbors;
  vtkIdList* CellIds;
  vtkIdList* NearPointIds;
 
  vtkAbstractPointLocator* PointLocator;
  bool OwnsLocator; // was the locator specified? or taken from associated point set
 
private:
  vtkClosestPointStrategy(const vtkClosestPointStrategy&) = delete;
  void operator=(const vtkClosestPointStrategy&) = delete;
};
 
// Handle cases where starting cell is provided or not
inline vtkCell* vtkClosestPointStrategy::SelectCell(
  vtkPointSet* self, vtkIdType cellId, vtkCell* cell, vtkGenericCell* gencell)
{
  if (!cell)
  {
    if (gencell)
    {
      self->GetCell(cellId, gencell);
      cell = gencell;
    }
    else
    {
      cell = self->GetCell(cellId);
    }
  }
  return cell;
}
 
#endif