circle.hpp

#pragma once
 
#include "global.hpp"
 
#include "point_2d.hpp"
 
namespace Cvb
{
 
CVB_BEGIN_INLINE_NS
 
 
class Circle final
{
  public:
 
 
    Circle(Point2D<double> center, double radius) noexcept
      : center_(center)
      , radius_(std::abs(radius))
    {
    }
 
 
    Point2D<double> Center() const noexcept
    {
      return center_;
    }
 
 
    void SetCenter(Point2D<double> center) noexcept
    {
      center_ = center;
    }
 
 
    double Radius() const noexcept
    {
      return radius_;
    }
 
 
    void SetRadius(double radius) noexcept
    {
      radius_ = std::abs(radius);
    }
 
 
    bool Contains(Point2D<double> point) const noexcept
    {
      auto delta = point - center_;
      return delta.Length() <= radius_;
    }
 
 
    bool IsOnRadius(Point2D<double> point, double epsilon) const noexcept
    {
      auto delta = point - center_;
      return std::abs(delta.Length() - radius_) < epsilon;
    }
 
 
 
 
    bool operator==(const Circle& circle) const noexcept
    {
      return (center_ == circle.center_
        && radius_ == circle.radius_);
    }
 
 
 
    bool operator!=(const Circle& circle) const noexcept
    {
      return !(*this == circle);
    }
 
  private:
 
    Point2D<double> center_;
    double radius_ = 0.0;
 
};
 
 
CVB_END_INLINE_NS
 
}