spline2d.h

#pragma once
 
#include "software/geom/point.h"
#include "software/geom/polynomial2d.h"
 
// Pre-declaration so we can make this a friend class of SplineSegment2d
class Spline2d;
 
class SplineSegment2d
{
   public:
    SplineSegment2d() = delete;
 
    double getParametrizationStartVal() const;
 
    double getParametrizationEndVal() const;
 
    const Polynomial2d &getPolynomial() const;
 
   protected:
    friend class Spline2d;
 
    SplineSegment2d(double start_val, double end_val, Polynomial2d polynomial);
 
   private:
    const double start_val;
    const double end_val;
    const Polynomial2d polynomial;
};
 
class Spline2d
{
   public:
    virtual const Point getValueAt(double t) const = 0;
 
    virtual const std::vector<Point> getKnots() const = 0;
 
    virtual size_t getNumKnots() const = 0;
 
    virtual std::vector<double> getKnotParametrizationValues() const = 0;
 
    virtual const Point getStartPoint() const = 0;
 
    virtual const Point getEndPoint() const = 0;
 
    virtual const std::vector<SplineSegment2d> getSplineSegments() const = 0;
 
   protected:
    static SplineSegment2d createSplineSegment2d(double start_val, double end_val,
                                                 Polynomial2d polynomial);
};