vtkSpline.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkSpline.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 vtkSpline_h
#define vtkSpline_h
 
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"
 
class vtkPiecewiseFunction;
 
class VTKCOMMONDATAMODEL_EXPORT vtkSpline : public vtkObject
{
public:
  vtkTypeMacro(vtkSpline, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  void SetParametricRange(double tMin, double tMax);
  void SetParametricRange(double tRange[2]) { this->SetParametricRange(tRange[0], tRange[1]); }
  void GetParametricRange(double tRange[2]) const;
 
 
  vtkSetMacro(ClampValue, vtkTypeBool);
  vtkGetMacro(ClampValue, vtkTypeBool);
  vtkBooleanMacro(ClampValue, vtkTypeBool);
 
  virtual void Compute() = 0;
 
  virtual double Evaluate(double t) = 0;
 
  int GetNumberOfPoints();
 
  void AddPoint(double t, double x);
 
  void RemovePoint(double t);
 
  void RemoveAllPoints();
 
 
  vtkSetMacro(Closed, vtkTypeBool);
  vtkGetMacro(Closed, vtkTypeBool);
  vtkBooleanMacro(Closed, vtkTypeBool);
 
 
  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);
 
  vtkMTimeType GetMTime() override;
 
  virtual void DeepCopy(vtkSpline* s);
 
protected:
  vtkSpline();
  ~vtkSpline() override;
 
  vtkMTimeType ComputeTime;
  vtkTypeBool ClampValue;
  double* Intervals;
  double* Coefficients;
  int LeftConstraint;
  double LeftValue;
  int RightConstraint;
  double RightValue;
  vtkPiecewiseFunction* PiecewiseFunction;
  vtkTypeBool Closed;
 
  // Explicitly specify the parametric range.
  double ParametricRange[2];
 
  // Helper methods
  double ComputeLeftDerivative();
  double ComputeRightDerivative();
  int FindIndex(int size, double t);
 
private:
  vtkSpline(const vtkSpline&) = delete;
  void operator=(const vtkSpline&) = delete;
};
 
#endif