vtkSplineFilter.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkSplineFilter.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 vtkSplineFilter_h
#define vtkSplineFilter_h
 
#include "vtkFiltersGeneralModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
 
#define VTK_SUBDIVIDE_SPECIFIED 0
#define VTK_SUBDIVIDE_LENGTH    1
 
#define VTK_TCOORDS_OFF                    0
#define VTK_TCOORDS_FROM_NORMALIZED_LENGTH 1
#define VTK_TCOORDS_FROM_LENGTH            2
#define VTK_TCOORDS_FROM_SCALARS           3
 
class vtkCellArray;
class vtkCellData;
class vtkFloatArray;
class vtkPointData;
class vtkPoints;
class vtkSpline;
 
class VTKFILTERSGENERAL_EXPORT vtkSplineFilter : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkSplineFilter,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);
 
  static vtkSplineFilter *New();
 
 
  vtkSetClampMacro(MaximumNumberOfSubdivisions,int,1,VTK_INT_MAX);
  vtkGetMacro(MaximumNumberOfSubdivisions,int);
 
 
  vtkSetClampMacro(Subdivide,int,VTK_SUBDIVIDE_SPECIFIED,VTK_SUBDIVIDE_LENGTH);
  vtkGetMacro(Subdivide,int);
  void SetSubdivideToSpecified()
    {this->SetSubdivide(VTK_SUBDIVIDE_SPECIFIED);}
  void SetSubdivideToLength()
    {this->SetSubdivide(VTK_SUBDIVIDE_LENGTH);}
  const char *GetSubdivideAsString();
 
 
  vtkSetClampMacro(NumberOfSubdivisions,int,1,VTK_INT_MAX);
  vtkGetMacro(NumberOfSubdivisions,int);
 
 
  vtkSetClampMacro(Length,double,0.0000001,VTK_DOUBLE_MAX);
  vtkGetMacro(Length,double);
 
 
  virtual void SetSpline(vtkSpline*);
  vtkGetObjectMacro(Spline,vtkSpline);
 
 
  vtkSetClampMacro(GenerateTCoords,int,VTK_TCOORDS_OFF,
                   VTK_TCOORDS_FROM_SCALARS);
  vtkGetMacro(GenerateTCoords,int);
  void SetGenerateTCoordsToOff()
    {this->SetGenerateTCoords(VTK_TCOORDS_OFF);}
  void SetGenerateTCoordsToNormalizedLength()
    {this->SetGenerateTCoords(VTK_TCOORDS_FROM_NORMALIZED_LENGTH);}
  void SetGenerateTCoordsToUseLength()
    {this->SetGenerateTCoords(VTK_TCOORDS_FROM_LENGTH);}
  void SetGenerateTCoordsToUseScalars()
    {this->SetGenerateTCoords(VTK_TCOORDS_FROM_SCALARS);}
  const char *GetGenerateTCoordsAsString();
 
 
  vtkSetClampMacro(TextureLength,double,0.000001,VTK_INT_MAX);
  vtkGetMacro(TextureLength,double);
 
protected:
  vtkSplineFilter();
  ~vtkSplineFilter();
 
  // Usual data generation method
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
 
  int       MaximumNumberOfSubdivisions;
  int       Subdivide;
  int       NumberOfSubdivisions;
  double     Length;
  vtkSpline *Spline;
  vtkSpline *XSpline;
  vtkSpline *YSpline;
  vtkSpline *ZSpline;
  int       GenerateTCoords;
  double     TextureLength; //this length is mapped to [0,1) texture space
 
  //helper methods
  int GeneratePoints(vtkIdType offset, vtkIdType npts, vtkIdType *pts,
                     vtkPoints *inPts, vtkPoints *newPts, vtkPointData *pd,
                     vtkPointData *outPD, int genTCoords,
                     vtkFloatArray *newTCoords);
 
  void GenerateLine(vtkIdType offset, vtkIdType numGenPts, vtkIdType inCellId,
                    vtkCellData *cd, vtkCellData *outCD, vtkCellArray *newLines);
 
  //helper members
  vtkFloatArray *TCoordMap;
 
private:
  vtkSplineFilter(const vtkSplineFilter&);  // Not implemented.
  void operator=(const vtkSplineFilter&);  // Not implemented.
};
 
#endif