//
// Created by Иван Ильин on 10.10.2021.
//

#ifndef SHOOTER_VEC2D_H
#define SHOOTER_VEC2D_H

#include <array>
#include "Vec4D.h"

class Vec2D final {
private:
    std::array<double, 2> _arr_point{};

public:
    Vec2D () = default;
    Vec2D (const Vec2D& vec);
    explicit Vec2D (const Vec4D& point4D);
    explicit Vec2D (double x, double y = 0.0);
    Vec2D& operator=(const Vec2D&) = default;

    [[nodiscard]] double x() const { return _arr_point[0]; }
    [[nodiscard]] double y() const { return _arr_point[1]; }

    [[nodiscard]] Vec2D operator-() const;

    // Boolean operations
    bool operator==(const Vec2D& vec) const;
    bool operator!=(const Vec2D& vec) const;

    [[nodiscard]] Vec2D operator+(const Vec2D& vec) const;
    [[nodiscard]] Vec2D operator-(const Vec2D& vec) const;

    [[nodiscard]] double dot(const Vec2D& vec) const; // Returns dot product

    // Operations with numbers
    [[nodiscard]] Vec2D operator*(double number) const;
    [[nodiscard]] Vec2D operator/(double number) const;

    // Other useful methods
    [[nodiscard]] double sqrAbs() const; // Returns squared vector length
    [[nodiscard]] double abs() const; // Returns vector length
    [[nodiscard]] Vec2D normalized() const; // Returns normalized vector without changing
};


#endif //SHOOTER_VEC2D_H