#pragma once
#include "rtweekend.h"

class camera{
    public:
        camera(){
             auto aspect_ratio = 16.0 / 9.0;
             auto viewport_height = 2.0;
             auto viewport_width = aspect_ratio * viewport_height;
             auto focal_length = 1.0;

            origin = point3(0,0,0);
            horizontal = vec3(viewport_width, 0, 0);
            vertical = vec3(0, viewport_height, 0);
            lower_left_corner = origin - horizontal/2 - vertical/2 - vec3(0,0,focal_length);
        }

        ray get_ray(double u, double v) const {
            return ray(origin, lower_left_corner + u * horizontal + v*vertical - origin);
        }

        private:
            point3 origin;
            point3 lower_left_corner;
            vec3 horizontal;
            vec3 vertical;
};