def color(r):
t = hit_sphere(Vector(0, 0, -1), 0.5, r)
if t > 0:
N = (r.point_at_parameter(t) - Vector(0, 0, -1)).normalize()
return 0.5 * Vector(N.values[0] + 1, N.values[1] + 1, N.values[2] + 1)
unit_direction = r.direction().normalize()
t = 0.5 * (unit_direction.values[1] + 1)
return (1.0 - t) * Vector(1., 1., 1.) + t * Vector(0.5, 0.7, 1.0)
def color(ray: Ray, world: HitableList):
hit_world = world.hit(ray, 0.0, float("inf"))
if hit_world is not None:
normal = hit_world.get_normal()
return 0.5 * Vector(normal.values[0] + 1, normal.values[1] + 1, normal.values[2] + 1)
else:
unit_direction = r.direction().normalize()
t = 0.5 * (unit_direction.values[1] + 1)
return (1.0 - t) * Vector(1., 1., 1.) + t * Vector(0.5, 0.7, 1.0)
if hit_world is not None:
normal = hit_world.get_normal()
return 0.5 * Vector(normal.values[0] + 1, normal.values[1] + 1,
normal.values[2] + 1)
else:
unit_direction = r.direction().normalize()
t = 0.5 * (unit_direction.values[1] + 1)
return (1.0 - t) * Vector(1., 1., 1.) + t * Vector(0.5, 0.7, 1.0)
image_file = os.path.join(os.getcwd(), 'image.txt')
with open(image_file, 'w') as f:
nx = 200
ny = 100
f.write("P3\n{} {}\n255\n".format(nx, ny))
lower_left_corner = Vector(-2.0, -1.0, -1.0)
horizontal = Vector(4.0, 0.0, 0.0)
vertical = Vector(0.0, 2.0, 0.0)
origin = Vector(0.0, 0.0, 0.0)
spheres = [
Sphere(Vector(0, 0, -1), 0.5),
Sphere(Vector(0, -100.5, -1), 100)
]
for j in range(ny - 1, -1, -1):
for i in range(0, nx):
u = float(i) / nx
v = float(j) / ny
r = Ray(origin, lower_left_corner + u * horizontal + v * vertical)
col = color(r, HitableList(spheres))
ir = (int(255.99 * col.values[0]))
ig = (int(255.99 * col.values[1]))
def color(r):
t = hit_sphere(Vector(0, 0, -1), 0.5, r)
if t > 0:
N = (r.point_at_parameter(t) - Vector(0, 0, -1)).normalize()
return 0.5 * Vector(N.values[0] + 1, N.values[1] + 1, N.values[2] + 1)
unit_direction = r.direction().normalize()
t = 0.5 * (unit_direction.values[1] + 1)
return (1.0 - t) * Vector(1., 1., 1.) + t * Vector(0.5, 0.7, 1.0)
image_file = os.path.join(os.getcwd(), 'image.txt')
with open(image_file, 'w') as f:
nx = 200
ny = 100
f.write("P3\n{} {}\n255\n".format(nx, ny))
lower_left_corner = Vector(-2.0, -1.0, -1.0)
horizontal = Vector(4.0, 0.0, 0.0)
vertical = Vector(0.0, 2.0, 0.0)
origin = Vector(0.0, 0.0, 0.0)
for j in range(ny - 1, -1, -1):
for i in range(0, nx):
u = float(i) / nx
v = float(j) / ny
r = Ray(origin, lower_left_corner + u * horizontal + v * vertical)
col = color(r)
ir = (int(255.99 * col.values[0]))
ig = (int(255.99 * col.values[1]))
ib = (int(255.99 * col.values[2]))
f.write("{} {} {}\n".format(ir, ig, ib))
if hit_world is not None:
normal = hit_world.get_normal()
return 0.5 * Vector(normal.values[0] + 1, normal.values[1] + 1, normal.values[2] + 1)
else:
unit_direction = r.direction().normalize()
t = 0.5 * (unit_direction.values[1] + 1)
return (1.0 - t) * Vector(1., 1., 1.) + t * Vector(0.5, 0.7, 1.0)
image_file = os.path.join(os.getcwd(), 'image.txt')
with open(image_file, 'w') as f:
nx = 200
ny = 100
ns = 100
f.write("P3\n{} {}\n255\n".format(nx, ny))
lower_left_corner = Vector(-2.0, -1.0, -1.0)
horizontal = Vector(4.0, 0.0, 0.0)
vertical = Vector(0.0, 2.0, 0.0)
origin = Vector(0.0, 0.0, 0.0)
spheres = [Sphere(Vector(0, 0, -1), 0.5), Sphere(Vector(0, -100.5, -1), 100)]
camera = Camera()
for j in range(ny - 1, -1, -1):
for i in range(0, nx):
u = float(i) / nx
v = float(j) / ny
col = Vector(0, 0, 0)
for s in range(0, ns):
u = (i + random.random()) / nx
v = (j + random.random()) / ny
r = camera.get_ray(u, v)
def color(ray: Ray):
if (hit_sphere(Vector(0, 0, -1), 0.5, ray)):
return Vector(1, 0, 0)
unit_direction = ray.direction().normalize()
t = 0.5 * (unit_direction.values[1] + 1)
return (1.0 - t) * Vector(1., 1., 1.) + t * Vector(0.5, 0.7, 1.0)