vtkHyperStreamline.h

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

  Program:   Visualization Toolkit
  Module:    vtkHyperStreamline.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 vtkHyperStreamline_h
#define vtkHyperStreamline_h

#include "vtkFiltersGeneralModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"

#define VTK_INTEGRATE_FORWARD 0
#define VTK_INTEGRATE_BACKWARD 1
#define VTK_INTEGRATE_BOTH_DIRECTIONS 2

#define VTK_INTEGRATE_MAJOR_EIGENVECTOR 0
#define VTK_INTEGRATE_MEDIUM_EIGENVECTOR 1
#define VTK_INTEGRATE_MINOR_EIGENVECTOR 2


class vtkHyperArray;

class VTKFILTERSGENERAL_EXPORT vtkHyperStreamline : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkHyperStreamline,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  static vtkHyperStreamline *New();

  void SetStartLocation(vtkIdType cellId, int subId, double pcoords[3]);


  void SetStartLocation(vtkIdType cellId, int subId, double r, double s,
                        double t);

  vtkIdType GetStartLocation(int& subId, double pcoords[3]);

  void SetStartPosition(double x[3]);

  void SetStartPosition(double x, double y, double z);

  double *GetStartPosition();


  vtkSetClampMacro(MaximumPropagationDistance,double,0.0,VTK_DOUBLE_MAX);
  vtkGetMacro(MaximumPropagationDistance,double);


  vtkSetClampMacro(IntegrationEigenvector,int,
                   VTK_INTEGRATE_MAJOR_EIGENVECTOR,
                   VTK_INTEGRATE_MINOR_EIGENVECTOR);
  vtkGetMacro(IntegrationEigenvector,int);
  void SetIntegrationEigenvectorToMajor()
    {this->SetIntegrationEigenvector(VTK_INTEGRATE_MAJOR_EIGENVECTOR);};
  void SetIntegrationEigenvectorToMedium()
    {this->SetIntegrationEigenvector(VTK_INTEGRATE_MEDIUM_EIGENVECTOR);};
  void SetIntegrationEigenvectorToMinor()
    {this->SetIntegrationEigenvector(VTK_INTEGRATE_MINOR_EIGENVECTOR);};


  void IntegrateMajorEigenvector()
    {this->SetIntegrationEigenvectorToMajor();};


  void IntegrateMediumEigenvector()
    {this->SetIntegrationEigenvectorToMedium();};


  void IntegrateMinorEigenvector()
    {this->SetIntegrationEigenvectorToMinor();};


  vtkSetClampMacro(IntegrationStepLength,double,0.001,0.5);
  vtkGetMacro(IntegrationStepLength,double);


  vtkSetClampMacro(StepLength,double,0.000001,1.0);
  vtkGetMacro(StepLength,double);


  vtkSetClampMacro(IntegrationDirection,int,
                  VTK_INTEGRATE_FORWARD,VTK_INTEGRATE_BOTH_DIRECTIONS);
  vtkGetMacro(IntegrationDirection,int);
  void SetIntegrationDirectionToForward()
    {this->SetIntegrationDirection(VTK_INTEGRATE_FORWARD);};
  void SetIntegrationDirectionToBackward()
    {this->SetIntegrationDirection(VTK_INTEGRATE_BACKWARD);};
  void SetIntegrationDirectionToIntegrateBothDirections()
    {this->SetIntegrationDirection(VTK_INTEGRATE_BOTH_DIRECTIONS);};


  vtkSetClampMacro(TerminalEigenvalue,double,0.0,VTK_DOUBLE_MAX);
  vtkGetMacro(TerminalEigenvalue,double);


  vtkSetClampMacro(NumberOfSides,int,3,VTK_INT_MAX);
  vtkGetMacro(NumberOfSides,int);


  vtkSetClampMacro(Radius,double,0.0001,VTK_DOUBLE_MAX);
  vtkGetMacro(Radius,double);


  vtkSetMacro(LogScaling,int);
  vtkGetMacro(LogScaling,int);
  vtkBooleanMacro(LogScaling,int);

protected:
  vtkHyperStreamline();
  ~vtkHyperStreamline();

  // Integrate data
  virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  int BuildTube(vtkDataSet *input, vtkPolyData *output);

  virtual int FillInputPortInformation(int port, vtkInformation *info);

  // Flag indicates where streamlines start from (either position or location)
  int StartFrom;

  // Starting from cell location
  vtkIdType StartCell;
  int StartSubId;
  double StartPCoords[3];

  // starting from global x-y-z position
  double StartPosition[3];

  //array of hyperstreamlines
  vtkHyperArray *Streamers;
  int NumberOfStreamers;

  // length of hyperstreamline in absolute distance
  double MaximumPropagationDistance;

  // integration direction
  int IntegrationDirection;

  // the length (fraction of cell size) of integration steps
  double IntegrationStepLength;

  // the length of the tube segments composing the hyperstreamline
  double StepLength;

  // terminal propagation speed
  double TerminalEigenvalue;

  // number of sides of tube
  int NumberOfSides;

  // maximum radius of tube
  double Radius;

  // boolean controls whether scaling is clamped
  int LogScaling;

  // which eigenvector to use as integration vector field
  int IntegrationEigenvector;
private:
  vtkHyperStreamline(const vtkHyperStreamline&);  // Not implemented.
  void operator=(const vtkHyperStreamline&);  // Not implemented.
};

#endif