def test8(self):
instance = HermiteInterface()
instance.initialize_code()
instance.set_eps2(0)
instance.commit_parameters()
id1, errorcode = instance.new_particle(mass=10.0,
radius=1.0,
x=0.0,
y=0.0,
z=0.0,
vx=0.0,
vy=0.0,
vz=0.0)
id2, errorcode = instance.new_particle(mass=1.0,
radius=1.0,
x=2.0,
y=0.0,
z=0.0,
vx=10.0,
vy=0.0,
vz=0.0)
instance.commit_particles()
potential, errorcode = instance.get_potential(id1)
self.assertEqual(errorcode, 0)
self.assertAlmostRelativeEquals(potential, -1.0 / numpy.sqrt(2.0**2),
8)
total_potential, errorcode = instance.get_potential_energy()
potentials, errorcode = instance.get_potential([id1, id2])
instance.cleanup_code()
instance.stop()
self.assertAlmostRelativeEquals(
total_potential,
numpy.sum(potentials * [10.0, 1.0]) / 2.0)
def test9(self):
print("Test HermiteInterface evolve_model")
instance = HermiteInterface()
self.assertEqual(0, instance.initialize_code())
self.assertEqual(0, instance.set_dt_param(0.001))
self.assertEqual(0, instance.set_end_time_accuracy_factor(0.0))
self.assertEqual(0, instance.commit_parameters())
# Set up an equal-mass binary on a circular orbit:
self.assertEqual([0, 0], list(instance.new_particle(0.5, 0.5, 0, 0, 0, 0.5, 0, 0.01).values()))
self.assertEqual([1, 0], list(instance.new_particle(0.5, -0.5, 0, 0, 0,-0.5, 0, 0.01).values()))
self.assertEqual(0, instance.commit_particles())
self.assertEqual(0, instance.evolve_model(math.pi))
for result, expected in zip(list(instance.get_position(0).values()), [-0.5, 0.0, 0.0, 0]):
self.assertAlmostEqual(result, expected, 3)
for result, expected in zip(list(instance.get_position(1).values()), [0.5, 0.0, 0.0, 0]):
self.assertAlmostEqual(result, expected, 3)
self.assertEqual(0, instance.evolve_model(2 * math.pi))
for result, expected in zip(list(instance.get_position(0).values()), [0.5, 0.0, 0.0, 0]):
self.assertAlmostEqual(result, expected, 3)
for result, expected in zip(list(instance.get_position(1).values()), [-0.5, 0.0, 0.0, 0]):
self.assertAlmostEqual(result, expected, 3)
self.assertEqual(0, instance.cleanup_code())
instance.cleanup_code()
instance.stop()
