vtkStaticPointLocator2D.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkStaticPointLocator2D.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 vtkStaticPointLocator2D_h
#define vtkStaticPointLocator2D_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkAbstractPointLocator.h"

class vtkIdList;
struct vtkBucketList2D;


class VTKCOMMONDATAMODEL_EXPORT vtkStaticPointLocator2D : public vtkAbstractPointLocator
{
public:
  static vtkStaticPointLocator2D *New();


  vtkTypeMacro(vtkStaticPointLocator2D,vtkAbstractPointLocator);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkSetClampMacro(NumberOfPointsPerBucket,int,1,VTK_INT_MAX);
  vtkGetMacro(NumberOfPointsPerBucket,int);


  vtkSetVector2Macro(Divisions,int);
  vtkGetVectorMacro(Divisions,int,2);

  // Re-use any superclass signatures that we don't override.
  using vtkAbstractPointLocator::FindClosestPoint;
  using vtkAbstractPointLocator::FindClosestNPoints;
  using vtkAbstractPointLocator::FindPointsWithinRadius;
  using vtkAbstractPointLocator::GetBounds;

  vtkIdType FindClosestPoint(const double x[3]) override;


  vtkIdType FindClosestPointWithinRadius(
    double radius, const double x[3], double& dist2) override;
  virtual vtkIdType FindClosestPointWithinRadius(double radius, const double x[3],
                                                 double inputDataLength,
                                                 double& dist2);

  void FindClosestNPoints(int N, const double x[3], vtkIdList *result) override;

  void FindPointsWithinRadius(double R, const double x[3],
                              vtkIdList *result) override;

  int IntersectWithLine(double a0[3], double a1[3], double tol, double& t,
                        double lineX[3], double ptX[3], vtkIdType &ptId);



  double FindCloseNBoundedPoints(int N, const double x[3], vtkIdList *result);

  void MergePoints(double tol, vtkIdType *mergeMap);


  void Initialize() override;
  void FreeSearchStructure() override;
  void BuildLocator() override;

  vtkIdType GetNumberOfPointsInBucket(vtkIdType bNum);

  void GetBucketIds(vtkIdType bNum, vtkIdList *bList);


  vtkSetClampMacro(MaxNumberOfBuckets,vtkIdType,1000,VTK_ID_MAX);
  vtkGetMacro(MaxNumberOfBuckets,vtkIdType);

  bool GetLargeIds() {return this->LargeIds;}


  void GetBounds(double *bounds) override
  {
    bounds[0] = this->Bounds[0];
    bounds[1] = this->Bounds[1];
    bounds[2] = this->Bounds[2];
    bounds[3] = this->Bounds[3];
  }


  virtual double *GetSpacing() { return this->H; }
  virtual void GetSpacing(double spacing[3])
  { spacing[0] = this->H[0]; spacing[1] = this->H[1]; spacing[2] = 0.0; }


  void GetBucketIndices(const double *x, int ij[2]) const;
  vtkIdType GetBucketIndex(const double *x) const;

  void GenerateRepresentation(int level, vtkPolyData *pd) override;

protected:
  vtkStaticPointLocator2D();
  ~vtkStaticPointLocator2D() override;

  int NumberOfPointsPerBucket; // Used with AutomaticOn to control subdivide
  int Divisions[2]; // Number of sub-divisions in x-y directions
  double H[2]; // Width of each bucket in x-y directions
  vtkBucketList2D *Buckets; // Lists of point ids in each bucket
  vtkIdType MaxNumberOfBuckets; // Maximum number of buckets in locator
  bool LargeIds; //indicate whether integer ids are small or large

private:
  vtkStaticPointLocator2D(const vtkStaticPointLocator2D&) = delete;
  void operator=(const vtkStaticPointLocator2D&) = delete;

};

#endif