vtkCachingInterpolatedVelocityField.h

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

  Program:   Visualization Toolkit
  Module:    vtkCachingInterpolatedVelocityField.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 vtkCachingInterpolatedVelocityField_h
#define vtkCachingInterpolatedVelocityField_h

#include "vtkFiltersFlowPathsModule.h" // For export macro
#include "vtkFunctionSet.h"
#include "vtkSmartPointer.h" // this is allowed

#include <vector> // we need them

class vtkDataSet;
class vtkDataArray;
class vtkPointData;
class vtkGenericCell;
class vtkAbstractCellLocator;

//---------------------------------------------------------------------------
class IVFDataSetInfo;
//---------------------------------------------------------------------------
class IVFCacheList : public std::vector< IVFDataSetInfo > {};
//---------------------------------------------------------------------------

class VTKFILTERSFLOWPATHS_EXPORT vtkCachingInterpolatedVelocityField : public vtkFunctionSet
{
public:
  vtkTypeMacro(vtkCachingInterpolatedVelocityField,vtkFunctionSet);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static vtkCachingInterpolatedVelocityField *New();


  int FunctionValues(double* x, double* f) override;
  virtual int InsideTest(double* x);

  virtual void SetDataSet(int I, vtkDataSet* dataset, bool staticdataset, vtkAbstractCellLocator *locator);


  vtkGetStringMacro(VectorsSelection);
  void SelectVectors(const char *fieldName)
    {this->SetVectorsSelection(fieldName);}

  void SetLastCellInfo(vtkIdType c, int datasetindex);

  void ClearLastCellInfo();


  int GetLastWeights(double* w);
  int GetLastLocalCoordinates(double pcoords[3]);


  vtkGetMacro(CellCacheHit, int);
  vtkGetMacro(DataSetCacheHit, int);
  vtkGetMacro(CacheMiss, int);

protected:
  vtkCachingInterpolatedVelocityField();
 ~vtkCachingInterpolatedVelocityField() override;

  vtkGenericCell          *TempCell;
  int                      CellCacheHit;
  int                      DataSetCacheHit;
  int                      CacheMiss;
  int                      LastCacheIndex;
  int                      LastCellId;
  IVFDataSetInfo          *Cache;
  IVFCacheList          CacheList;
  char                    *VectorsSelection;

  std::vector<double>   Weights;

  vtkSetStringMacro(VectorsSelection);

  // private versions which work on the passed dataset/cache
  // these do the real computation
  int FunctionValues(IVFDataSetInfo *cache, double *x, double *f);
  int InsideTest(IVFDataSetInfo *cache, double* x);

  friend class vtkTemporalInterpolatedVelocityField;

  void FastCompute(IVFDataSetInfo *cache, double f[3]);
  bool InterpolatePoint(vtkPointData *outPD, vtkIdType outIndex);
  bool InterpolatePoint(vtkCachingInterpolatedVelocityField *inCIVF,
                        vtkPointData *outPD, vtkIdType outIndex);
  vtkGenericCell *GetLastCell();

private:
  vtkCachingInterpolatedVelocityField(const vtkCachingInterpolatedVelocityField&) = delete;
  void operator=(const vtkCachingInterpolatedVelocityField&) = delete;
};

//---------------------------------------------------------------------------

// IVFDataSetInfo
#ifndef DOXYGEN_SHOULD_SKIP_THIS
//

//
class IVFDataSetInfo
{
public:
  vtkSmartPointer<vtkDataSet>             DataSet;
  vtkSmartPointer<vtkAbstractCellLocator> BSPTree;
  vtkSmartPointer<vtkGenericCell>         Cell;
  double                                  PCoords[3];
  float                                  *VelocityFloat;
  double                                 *VelocityDouble;
  double                                  Tolerance;
  bool                                    StaticDataSet;
  IVFDataSetInfo();
  IVFDataSetInfo(const IVFDataSetInfo &ivfci);
  IVFDataSetInfo &operator=(const IVFDataSetInfo &ivfci);
  void SetDataSet(vtkDataSet *data, char *velocity, bool staticdataset, vtkAbstractCellLocator *locator);
  //
  static const double TOLERANCE_SCALE;
};

//

//

#endif /* DOXYGEN_SHOULD_SKIP_THIS */

#endif