Python Sphere Examples

Example #1

	def test_intersect5(self):
		r = Ray(point(0, 0, 5), vector(0, 0, 1))
		s = Sphere()
		i = s.intersect(r)
		self.assertEqual(2, len(i))
		self.assertEqual(-6.0, i[0].t)
		self.assertEqual(-4.0, i[1].t)

Example #2

	def test_intersect_sphere1(self):
		s = Sphere()
		r = Ray(point(0, 0, -5), vector(0, 0, 1))
		s.set_transform(xf_scale(2, 2, 2))
		i = s.intersect(r)
		self.assertEqual(2, len(i))
		self.assertEqual(i[0].t, 3.0)
		self.assertEqual(i[1].t, 7.0)

Example #3

	def test_get_hit3(self):
		s = Sphere()
		ii = Intersections()
		i1 = Intersection(s, -2)
		ii.add(i1)
		i2 = Intersection(s, -1)
		ii.add(i2)
		self.assertEqual(ii.get_hit(), None)

Example #4

	def test_get_hit4(self):
		s = Sphere()
		ii = Intersections()
		i1 = Intersection(s, 5)
		ii.add(i1)
		i2 = Intersection(s, 7)
		ii.add(i2)
		i3 = Intersection(s, -3)
		ii.add(i3)
		i4 = Intersection(s, 2)
		ii.add(i4)
		self.assertEqual(ii.get_hit(), i4)

Example #5

	def test_intersect3(self):
		r = Ray(point(0, 2, -5), vector(0, 0, 1))
		s = Sphere()
		i = s.intersect(r)
		self.assertEqual(0, len(i))