dox/Filtering/vtkParametricSpline.h

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

  Program:   Visualization Toolkit
  Module:    vtkParametricSpline.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 __vtkParametricSpline_h
#define __vtkParametricSpline_h

class vtkSpline;
class vtkPoints;

#include "vtkParametricFunction.h"

class VTK_FILTERING_EXPORT vtkParametricSpline : public vtkParametricFunction
{
public:
  vtkTypeMacro(vtkParametricSpline,vtkParametricFunction);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  static vtkParametricSpline *New();

  virtual int GetDimension() {return 1;}

  virtual void Evaluate(double u[3], double Pt[3], double Du[9]);

  virtual double EvaluateScalar(double u[3], double Pt[3], double Du[9]);


  void SetXSpline(vtkSpline*);
  void SetYSpline(vtkSpline*);
  void SetZSpline(vtkSpline*);
  vtkGetObjectMacro(XSpline,vtkSpline);
  vtkGetObjectMacro(YSpline,vtkSpline);
  vtkGetObjectMacro(ZSpline,vtkSpline);


  void SetPoints(vtkPoints*);
  vtkGetObjectMacro(Points,vtkPoints);


  void SetNumberOfPoints(vtkIdType numPts);
  void SetPoint(vtkIdType index, double x, double y, double z);


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


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


  vtkSetClampMacro(LeftConstraint,int,0,3);
  vtkGetMacro(LeftConstraint,int);
  vtkSetClampMacro(RightConstraint,int,0,3);
  vtkGetMacro(RightConstraint,int);


  vtkSetMacro(LeftValue,double);
  vtkGetMacro(LeftValue,double);
  vtkSetMacro(RightValue,double);
  vtkGetMacro(RightValue,double);

protected:
  vtkParametricSpline();
  ~vtkParametricSpline();

  // Points definition
  vtkPoints *Points;

  // The interpolating splines for each of the x-y-z coordinates
  vtkSpline *XSpline;
  vtkSpline *YSpline;
  vtkSpline *ZSpline;

  // Supplemental variables
  int    Closed;
  int    LeftConstraint;
  int    RightConstraint;
  double LeftValue;
  double RightValue;
  int    ParameterizeByLength;

  // Initializing the spline
  unsigned long InitializeTime;
  int Initialize();
  
  // Internal variable for managing parametric coordinates
  double Length;
  double ClosedLength;
  
private:
  vtkParametricSpline(const vtkParametricSpline&);  // Not implemented.
  void operator=(const vtkParametricSpline&);  // Not implemented.
};

#endif

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