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import unittest
import numpy as np
from psbody.mesh.sphere import Sphere
class TestSphere(unittest.TestCase):
def test_intersection_is_symmetric(self):
d = 2
s0 = Sphere(np.array([0, 0, 0]), 1)
for dd in np.linspace(0, d, 10):
s1 = Sphere(np.array([d - dd, 0, 0]), 0.5)
self.assertAlmostEqual(s0.intersection_vol(s1), s1.intersection_vol(s0))
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