ellipse.hpp

#pragma once
 
#include "global.hpp"
 
#include "point_2d.hpp"
#include "angle.hpp"
 
namespace Cvb
{
 
CVB_BEGIN_INLINE_NS
 
 
class Ellipse final
{
  public:
 
 
    Ellipse(Point2D<double> center, double radiusA, double radiusB, Angle rotation)
      : center_(center)
      , radiusA_(std::max(std::abs(radiusA), std::abs(radiusB)))
      , radiusB_(std::min(std::abs(radiusA), std::abs(radiusB)))
      , rotation_(rotation)
    {
      rotation_.SetIsTrimmed(true);
 
      if(radiusA < 0.0)
        throw std::invalid_argument("invalid radius value");
      if(radiusB < 0.0)
        throw std::invalid_argument("invalid radius value");
    }
 
 
    Point2D<double> Center() const noexcept
    {
      return center_;
    }
 
 
    void SetCenter(Point2D<double> center) noexcept
    {
      center_ = center;
    }
 
 
    double RadiusA() const noexcept
    {
      return radiusA_;
    }
 
 
    void SetRadiusA(double radiusA)
    {
      if (radiusA <= radiusB_)
        throw std::invalid_argument("invalid radius value");
      radiusA_ = std::abs(radiusA);
    }
 
 
    double RadiusB() const noexcept
    {
      return radiusB_;
    }
 
 
    void SetRadiusB(double radiusB)
    {
      if (radiusB < 0.0 || radiusB > radiusA_)
        throw std::invalid_argument("invalid radius value");
      radiusB_ = std::abs(radiusB);
    }
 
 
    Angle Rotation() const noexcept
    {
      return rotation_;
    }
 
 
    void SetRotation(Angle rotation) noexcept
    {
      rotation_ = rotation;
      rotation_.SetIsTrimmed(true);
    }
 
 
    bool operator==(const Ellipse& ellipse) const noexcept
    {
      return (center_ == ellipse.center_
        && radiusA_ == ellipse.radiusA_
        && radiusB_ == ellipse.radiusB_
        && rotation_ == ellipse.rotation_);
    }
 
 
 
    bool operator!=(const Ellipse& ellipse) const noexcept
    {
      return !(*this == ellipse);
    }
 
  private:
 
    Point2D<double> center_;
    double radiusA_;
    double radiusB_;
    Angle rotation_;
 
};
 
 
CVB_END_INLINE_NS
 
}