def default_world():
light = point_light(Point(-10, 10, -10), Color(1, 1, 1))
s1 = Sphere()
s1.material.color = Color(.8, 1.0, .6)
s1.material.diffuse = .7
s1.material.specular = .2
s2 = set_transform(Sphere(), Scaling(.5, .5, .5))
return World(objects=[s1, s2], light=light)
def make_middle():
middle = set_transform(Sphere(), Translation(-0.5, 1, 0.5))
middle.material = Material()
middle.material.color = Color(0.1, 1, 0.5)
middle.material.diffuse = 0.7
middle.material.specular = 0.3
return middle
def make_right():
right = set_transform(Sphere(),
Translation(1.5, 0.5, -0.5) * Scaling(0.5, 0.5, 0.5))
right.material = Material()
right.material.color = Color(0.5, 1, 0.1)
right.material.diffuse = 0.7
right.material.specular = 0.3
return right
def make_left():
left = set_transform(
Sphere(),
Translation(-1.5, 0.33, -0.75) * Scaling(0.33, 0.33, 0.33))
left.material = Material()
left.material.color = Color(1, 0.8, 0.1)
left.material.diffuse = 0.7
left.material.specular = 0.3
return left
def make_middle():
middle = set_transform(Sphere(), Translation(-0.5, 1, 0.5))
middle.material = Material()
middle.material.color = Color(0.1, 1, 0.5)
middle.material.diffuse = 0.7
middle.material.specular = 0.3
middle.material.pattern = gradient_pattern(BLUE, GREEN)
middle.material.pattern.transform = Scaling(.2, .2, .2)
return middle
def make_left():
left = set_transform(
Sphere(),
Translation(-1.5, 0.33, -0.75) * Scaling(0.33, 0.33, 0.33))
left.material = Material()
left.material.color = Color(1, 0.8, 0.1)
left.material.diffuse = 0.7
left.material.specular = 0.3
left.material.pattern = checkers_pattern(WHITE, BLACK)
return left
def make_right():
right = set_transform(Sphere(),
Translation(1.5, 0.5, -0.5) * Scaling(0.5, 0.5, 0.5))
right.material = Material()
#right.material.color = Color(0.5, 1, 0.1)
#right.material.diffuse = 0.7
#right.material.specular = 0.3
right.material.pattern = ring_pattern(GREEN, BLACK)
right.material.pattern.transform = Scaling(.2, .2, .2) * rotation_x(
math.pi / 2)
return right
from ray_tracer.colors import RED
from ray_tracer.intersections import intersect, hit
from ray_tracer.rays import Ray
from ray_tracer.shapes import Sphere
from ray_tracer.tuples import Point, normalize
ray_origin = Point(0, 0, -5)
wall_z = 10
wall_size = 7
canvas_pixels = 100
pixel_size = wall_size / canvas_pixels
half = wall_size / 2
canvas = Canvas(canvas_pixels, canvas_pixels)
shape = Sphere()
for y in range(canvas_pixels - 1):
world_y = half - pixel_size * y
for x in range(canvas_pixels - 1):
world_x = -half + pixel_size * x
position = Point(world_x, world_y, wall_z)
r = Ray(ray_origin, normalize(position - ray_origin))
xs = intersect(shape, r)
if hit(xs) is not None:
write_pixel(canvas, x, y, RED)
path = Path(__file__).parent / "chap5.png"
canvas_to_png(str(path), canvas)
def step_impl(context, s):
_s = Sphere()
setattr(context, s, _s)
def glass_sphere():
s = Sphere()
s.material.transparency = 1.0
s.material.refractive_index = 1.5
return s
def make_wall(theta):
transform = Translation(0, 0, 5) * rotation_y(theta) * rotation_x(
math.pi / 2) * Scaling(10, .01, 10)
wall = set_transform(Sphere(), transform)
wall.material = floor_material()
return wall
def make_floor():
output = set_transform(Sphere(), Scaling(10, .01, 10))
output.material = floor_material()
return output
from pathlib import Path
from ray_tracer.canvas import Canvas, write_pixel, canvas_to_png
from ray_tracer.colors import Color, WHITE
from ray_tracer.intersections import intersect, hit
from ray_tracer.lights import point_light
from ray_tracer.material import Material, lighting
from ray_tracer.rays import Ray, position
from ray_tracer.shapes import Sphere
from ray_tracer.tuples import Point, normalize
ray_origin = Point(0, 0, -5)
wall_z = 10
wall_size = 7
light = point_light(Point(-10, 10, -10), WHITE)
shape = Sphere()
shape.material = Material()
shape.material.color = Color(1, .2, 1)
def get_color(a_hit, ray):
point = position(ray, a_hit.t)
normal = a_hit.object.normal_at(point)
eye = -ray.direction
color = lighting(a_hit.object.material, a_hit.object, light, point, eye,
normal)
return color
def cast_this_point(canvas, canvas_x, canvas_y, world_x, world_y):
spot_on_wall = Point(world_x, world_y, wall_z)
def step_impl(context, s):
_s = Sphere()
set_props_from_table(context, _s)
setattr(context, s, _s)