def test_lighting_behind_surface(): # eye behind surface
s = Sphere()
m = Material()
p = Point(0, 0, 0)
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, 10), Color(1, 1, 1))
res = m.lighting(s, light, p, eyev, normalv)
assert res == Color(0.1, 0.1, 0.1)
def test_lighting_eye_in_path(): # eye in reflection path
s = Sphere()
m = Material()
p = Point(0, 0, 0)
eyev = Vector(0, -math.sqrt(2) / 2, -math.sqrt(2) / 2)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 10, -10), Color(1, 1, 1))
res = m.lighting(s, light, p, eyev, normalv)
assert res == Color(1.6364, 1.6364, 1.6364)
def test_lighting_eye_opposite(): # eye opposite surface, 45 offset
s = Sphere()
m = Material()
p = Point(0, 0, 0)
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 10, -10), Color(1, 1, 1))
res = m.lighting(s, light, p, eyev, normalv)
assert res == Color(0.7364, 0.7364, 0.7364)
def test_lighting_eye_offset(): # eye between light and surface, 45 offset
s = Sphere()
m = Material()
p = Point(0, 0, 0)
eyev = Vector(0, math.sqrt(2) / 2, -math.sqrt(2) / 2)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color(1, 1, 1))
res = m.lighting(s, light, p, eyev, normalv)
assert res == Color(1.0, 1.0, 1.0)
def test_lighting_eye_between(): # eye between light and surface
s = Sphere()
m = Material()
p = Point(0, 0, 0)
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color(1, 1, 1))
res = m.lighting(s, light, p, eyev, normalv)
assert res == Color(1.9, 1.9, 1.9)
def test_surface_shadow():
s = Sphere()
m = Material()
p = Point(0, 0, 0)
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color(1, 1, 1))
in_shadow = True
result = m.lighting(s, light, p, eyev, normalv, in_shadow)
assert result == Color(0.1, 0.1, 0.1)
def test_lighting_with_pattern_applied(self):
m = Material()
m.pattern = StripePattern(Color.white(), Color.black())
m.ambient = 1
m.diffuse = 0
m.specular = 0
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color.white())
c1 = m.lighting(Sphere(), light, Point(0.9, 0, 0), eyev, normalv, False)
c2 = m.lighting(Sphere(), light, Point(1.1, 0, 0), eyev, normalv, False)
assert c1 == Color.white()
assert c2 == Color.black()
def test_lighting_pattern():
s = Sphere()
m = Material()
m.pattern = StripePattern(Color(1, 1, 1), Color(0, 0, 0))
m.ambient = 1
m.diffuse = 0
m.specular = 0
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color(1, 1, 1))
c1 = m.lighting(s, light, Point(0.9, 0, 0), eyev, normalv, False)
c2 = m.lighting(s, light, Point(1.1, 0, 0), eyev, normalv, False)
assert c1 == Color(1, 1, 1)
assert c2 == Color(0, 0, 0)
class TestMaterials(unittest.TestCase):
def setUp(self):
self.m = Material()
self.pos = Point(0, 0, 0)
def test_default_material(self):
self.assertEqual(self.m.color, Color(1, 1, 1))
self.assertEqual(self.m.ambient, 0.1)
self.assertEqual(self.m.diffuse, 0.9)
self.assertEqual(self.m.specular, 0.9)
self.assertEqual(self.m.shininess, 200)
def test_light_with_eye_between_light_and_surface(self):
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color(1, 1, 1))
result = self.m.lighting(eyev, normalv, self.pos, light)
self.assertEqual(result, Color(1.9, 1.9, 1.9))
def test_light_with_eye_between_light_and_surface_offest_45d(self):
eyev = Vector(0, math.sqrt(2) / 2, math.sqrt(2) / 2)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color(1, 1, 1))
result = self.m.lighting(eyev, normalv, self.pos, light)
self.assertEqual(result, Color(1.0, 1.0, 1.0))
def test_light_with_eye_opposite_surface_light_offset_45(self):
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 10, -10), Color(1, 1, 1))
result = self.m.lighting(eyev, normalv, self.pos, light)
self.assertEqual(result, Color(0.7364, 0.7364, 0.7364))
def test_light_with_eye_in_reflection_vector(self):
eyev = Vector(0, -math.sqrt(2) / 2, -math.sqrt(2) / 2)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 10, -10), Color(1, 1, 1))
result = self.m.lighting(eyev, normalv, self.pos, light)
self.assertEqual(result, Color(1.6364, 1.6364, 1.6364))
def test_light_with_light_behind_surface(self):
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, 10), Color(1, 1, 1))
result = self.m.lighting(eyev, normalv, self.pos, light)
self.assertEqual(result, Color(0.1, 0.1, 0.1))
def test_lighting_with_surface_in_shadow(self):
eyev = Vector(0, 0, -1)
normalv = Vector(0, 0, -1)
light = PointLight(Point(0, 0, -10), Color(1, 1, 1))
inShadow = True
result = self.m.lighting(eyev, normalv, self.pos, light, inShadow)
self.assertEqual(result, Color(0.1, 0.1, 0.1))
