def test_pattern_with_both_object_and_pattern_transformation(self):
obj = Sphere()
obj.transformation = scaling(2, 2, 2)
pattern = test_pattern()
pattern.transformation = translation(0.5, 1, 1.5)
c = pattern.pattern_at_shape(obj, Point(2.5, 3, 3.5))
assert c == Color(0.75, 0.5, 0.25)
def test_hit_should_offset_the_point(self):
r = Ray(Point(0, 0, -5), Vector(0, 0, 1))
shape = Sphere()
shape.transformation = translation(0, 0, 1)
i = Intersection(5, shape)
comps = i.prepare_computations(r)
assert comps.over_point.z < -EPSILON / 2
assert comps.point.z > comps.over_point.z
def default_world():
w = World()
w.light_source = PointLight(Point(-10, 10, -10), Color.white())
s1 = Sphere()
s1.material.color = Color(0.8, 1.0, 0.6)
s1.material.diffuse = 0.7
s1.material.specular = 0.2
s2 = Sphere()
s2.transformation = scaling(0.5, 0.5, 0.5)
w.add(s1, s2)
return w
def test_shade_hit_is_given_an_intersection_in_shadow(self):
w = World()
w.light_source = PointLight(Point(0, 0, -10), Color.white())
s1 = Sphere()
s2 = Sphere()
s2.transformation = translation(0, 0, 10)
w.add(s1, s2)
r = Ray(Point(0, 0, 5), Vector(0, 0, 1))
i = Intersection(4, s2)
comps = i.prepare_computations(r)
c = w.shade_hit(comps)
assert c == Color(0.1, 0.1, 0.1)
def test_shade_hit_with_transparent_material(self, default_world):
w = default_world
floor = Plane()
floor.transformation = translation(0, -1, 0)
floor.material.transparency = 0.5
floor.material.refractive_index = 1.5
ball = Sphere()
ball.material.color = Color(1, 0, 0)
ball.material.ambient = 0.5
ball.transformation = translation(0, -3.5, -0.5)
w.add(floor, ball)
r = Ray(Point(0, 0, -3), Vector(0, -sqrt(2) / 2, sqrt(2) / 2))
xs = Intersections(Intersection(sqrt(2), floor))
comps = xs[0].prepare_computations(r, xs)
color = w.shade_hit(comps, 5)
assert color == Color(0.93642, 0.68642, 0.68642)
from raytracer.patterns import *
from raytracer.matrices import scaling, rotation_y, rotation_x, translation, view_transform
from raytracer.scene import World
from raytracer.shapes import Sphere, Plane
from raytracer.tuples import Color, Point, Vector
if __name__ == '__main__':
floor = Plane()
floor.material.color = Color(.1, 1, .1)
floor.material.reflective = 0.9
floor.material.transparency = 1
floor.material.refractive_index = 1.333
under = Sphere()
under.transformation = translation(0, -.5, 0) * scaling(.25, .25, .25)
under.material.color = Color(0, .8, 0)
under.material.refractive_index = 1.5
under.material.ambient = .8
above = Sphere()
above.transformation = translation(1, .5, 0) * scaling(.5, .5, .5)
above.material.color = Color(.2, 0, 0)
above.material.diffuse = .8
above.material.ambient = .5
bottom = Plane()
bottom.transformation = translation(0, -1.25, 0)
bottom.material.pattern = StripePattern(Color.black(), Color(0, .2, .2))
bottom.material.diffuse = .25
bottom.material.ambient = .25
from raytracer.lights import PointLight
from raytracer.materials import Material
from raytracer.matrices import scaling, rotation_y, rotation_x, translation, view_transform
from raytracer.scene import World
from raytracer.shapes import Sphere, Plane
from raytracer.tuples import Color, Point, Vector
if __name__ == '__main__':
floor = Plane()
floor.material = Material()
floor.material.color = Color(1, 0.9, 0.9)
floor.material.specular = 0
middle = Sphere()
middle.transformation = translation(-0.5, 1, 0.5)
middle.material = Material()
middle.material.color = Color(0.5, 0, 0)
middle.material.diffuse = 0.7
middle.material.specular = 0.3
middle.material.reflective = 1
right = Sphere()
right.transformation = translation(1.5, 0.5, -0.5) * scaling(0.5, 0.5, 0.5)
right.material = Material()
right.material.color = Color(0.2, 0.2, 0.8)
right.material.diffuse = 0.7
right.material.specular = 0.3
right.material.reflective = .5
left = Sphere()
def test_pattern_with_object_transformation(self):
obj = Sphere()
obj.transformation = scaling(2, 2, 2)
pattern = test_pattern()
c = pattern.pattern_at_shape(obj, Point(2, 3, 4))
assert c == Color(1, 1.5, 2)
from raytracer.matrices import scaling, rotation_z, shearing
from raytracer.rays import Ray
from raytracer.shapes import Sphere
from raytracer.tuples import Point, Color
if __name__ == '__main__':
ray_origin = Point(0, 0, -5)
wall_z = 10
wall_size = 7.0
canvas_pixels = 100
pixel_size = wall_size / canvas_pixels
half = wall_size / 2
canvas = Canvas(canvas_pixels, canvas_pixels)
red = Color(1, 0, 0)
sphere = Sphere()
sphere.transformation = scaling(1, .5, 1).shear(1, 0, 0, 0, 0, 0)
for y in range(canvas_pixels):
world_y = half - pixel_size * y
for x in range(canvas_pixels):
world_x = -half + pixel_size * x
position = Point(world_x, world_y, wall_z)
ray = Ray(ray_origin, (position - ray_origin).normalize())
if sphere.intersect(ray).hit():
canvas.write_pixel(x, y, red)
write_ppm_to_file(canvas.to_ppm(),
f'..{sep}..{sep}resources{sep}circle.ppm')
from math import pi
from os import sep
from raytracer.camera import Camera
from raytracer.canvas import write_ppm_to_file
from raytracer.lights import PointLight
from raytracer.materials import Material
from raytracer.matrices import scaling, rotation_y, rotation_x, translation, view_transform
from raytracer.scene import World
from raytracer.shapes import Sphere
from raytracer.tuples import Color, Point, Vector
if __name__ == '__main__':
floor = Sphere()
floor.transformation = scaling(10, 0.01, 10)
floor.material = Material()
floor.material.color = Color(1, 0.9, 0.9)
floor.material.specular = 0
left_wall = Sphere()
left_wall.transformation = translation(0, 0, 5) * \
rotation_y(-pi / 4) * rotation_x(pi / 2) * \
scaling(10, 0.01, 10)
left_wall.material = floor.material
right_wall = Sphere()
right_wall.transformation = translation(0, 0, 5) * \
rotation_y(pi / 4) * rotation_x(pi / 2) * \
scaling(10, 0.01, 10)
right_wall.material = floor.material
middle = Sphere()