rpuzonas/raytracing-in-a-weekend-oop
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feat: add depth-of-field blur

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Rokas Puzonas 2022-03-13 20:53:40 +02:00
parent 0b5c3c20cb
commit e7552d1a8a
3 changed files with 84979 additions and 84963 deletions
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27
camera.h
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@ -12,25 +12,34 @@ class camera {
point3 lookat,
vec3 vup,
double vfov, // vertical field-of-view in degrees,
double aspect_ratio
double aspect_ratio,
double aperture,
double focus_dist
) {
auto theta = degrees_to_radians(vfov);
auto h = tan(theta/2);
auto viewport_height = 2.0 * h;
auto viewport_width = aspect_ratio * viewport_height;
auto w = unit_vector(lookfrom - lookat);
auto u = unit_vector(cross(vup, w));
auto v = cross(w, u);
w = unit_vector(lookfrom - lookat);
u = unit_vector(cross(vup, w));
v = cross(w, u);
origin = lookfrom;
horizontal = viewport_width * u;
vertical = viewport_height * v;
lower_left_corner = origin - horizontal/2 - vertical/2 - w;
horizontal = focus_dist * viewport_width * u;
vertical = focus_dist * viewport_height * v;
lower_left_corner = origin - horizontal/2 - vertical/2 - focus_dist*w;
lens_radius = aperture/2;
}
ray get_ray(double s, double t) const {
return ray(origin, lower_left_corner + s*horizontal + t*vertical - origin);
vec3 rd = lens_radius * random_in_unit_sphere();
vec3 offset = u* rd.x() + v * rd.y();
return ray(
origin + offset,
lower_left_corner + s*horizontal + t*vertical - origin - offset
);
}
private:
@ -38,6 +47,8 @@ class camera {
point3 lower_left_corner;
vec3 horizontal;
vec3 vertical;
vec3 u, v, w;
double lens_radius;
};
#endif

169908
image.ppm
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File diff suppressed because it is too large Load Diff

7
main.cc
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@ -52,7 +52,12 @@ int main() {
world.add(make_shared<sphere>(point3( 1, 0, -1), 0.5, material_right));
// Camera
camera cam(point3(-2, 2, 1), point3(0, 0, -1), vec3(0, 1, 0), 70, aspect_ratio);
point3 lookfrom(3, 3, 2);
point3 lookat(0, 0, -1);
vec3 vup(0, 1, 0);
auto dist_to_focus = (lookfrom-lookat).length();
auto aperture = 2.0;
camera cam(lookfrom, lookat, vup, 20, aspect_ratio, aperture, dist_to_focus);
// Render
std::cout<<"P3\n" <<image_width<<" "<<image_height<<"\n255\n";