toytracer/camera.h
2020-06-04 00:39:14 +02:00

32 lines
713 B
C++

#ifndef CAMERA_H
#define CAMERA_H
#include "vec3.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, 0.0);
vertical = Vec3(0.0, viewport_height, 0.0);
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;
};
#endif // CAMERA_H