def test6(self):
convert_nbody = nbody_system.nbody_to_si(5.0 | units.kg,
10.0 | units.m)
instance = BHTree(convert_nbody)
instance.commit_parameters()
indices = instance.new_particle(
[15.0, 30.0] | units.kg,
[10.0, 20.0] | units.m,
[20.0, 40.0] | units.m,
[30.0, 50.0] | units.m,
#1.0 | units.m/units.s, 1.0 | units.m/units.s, 3.0 | units.m/units.s
[0.0, 0.01] | units.m / units.s,
[0.0, 0.01] | units.m / units.s,
[0.0, 0.01] | units.m / units.s,
[10.0, 20.0] | units.m)
instance.commit_particles()
self.assertEquals(instance.get_mass(indices[0]), 15.0 | units.kg)
self.assertEquals(instance.get_mass(indices)[0], 15.0 | units.kg)
self.assertRaises(
AmuseException,
instance.get_mass, [4, 5],
expected_message=
"Error when calling 'get_mass' of a 'BHTree', errorcode is -1")
instance.cleanup_code()
instance.stop()
def test7(self):
convert_nbody = nbody_system.nbody_to_si(5.0 | units.kg,
10.0 | units.m)
instance = BHTree(convert_nbody)
instance.commit_parameters()
particles = datamodel.Particles(2)
self.assertEquals(len(instance.particles), 0)
particles.mass = [15.0, 30.0] | units.kg
particles.radius = [10.0, 20.0] | units.m
particles.position = [[10.0, 20.0, 30.0], [20.0, 40.0, 60.0]] | units.m
particles.velocity = [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0]
] | units.m / units.s
instance.particles.add_particles(particles)
instance.commit_particles()
self.assertEquals(instance.get_mass(1), 15.0 | units.kg)
self.assertAlmostRelativeEquals(
instance.get_position(1)[2], 30.0 | units.m)
self.assertEquals(len(instance.particles), 2)
self.assertAlmostRelativeEquals(instance.particles.mass[1],
30.0 | units.kg)
self.assertAlmostRelativeEquals(instance.particles.position[1][2],
60.0 | units.m)
instance.cleanup_code()
instance.stop()
def test7(self):
convert_nbody = nbody_system.nbody_to_si(5.0 | units.kg, 10.0 | units.m)
instance = BHTree(convert_nbody)
instance.commit_parameters()
particles = datamodel.Particles(2)
self.assertEquals(len(instance.particles), 0)
particles.mass = [15.0, 30.0] | units.kg
particles.radius = [10.0, 20.0] | units.m
particles.position = [[10.0, 20.0, 30.0], [20.0, 40.0, 60.0]] | units.m
particles.velocity = [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0]] | units.m / units.s
instance.particles.add_particles(particles)
instance.commit_particles()
self.assertEquals(instance.get_mass(1), 15.0| units.kg)
self.assertAlmostRelativeEquals(instance.get_position(1)[2], 30.0| units.m)
self.assertEquals(len(instance.particles), 2)
self.assertAlmostRelativeEquals(instance.particles.mass[1], 30.0 | units.kg)
self.assertAlmostRelativeEquals(instance.particles.position[1][2], 60.0 | units.m)
instance.cleanup_code()
instance.stop()
def test20(self):
particles = datamodel.Particles(2)
particles.x = [0.0, 10.0] | nbody_system.length
particles.y = 0.0 | nbody_system.length
particles.z = 0.0 | nbody_system.length
particles.radius = 0.005 | nbody_system.length
particles.vx = 0.0 | nbody_system.speed
particles.vy = 0.0 | nbody_system.speed
particles.vz = 0.0 | nbody_system.speed
particles.mass = 1.0 | nbody_system.mass
very_short_time_to_evolve = 1 | units.s
very_long_time_to_evolve = 1e9 | nbody_system.time
instance = BHTree()
instance.initialize_code()
instance.parameters.stopping_conditions_timeout = very_short_time_to_evolve
self.assertEquals(instance.parameters.stopping_conditions_timeout,
very_short_time_to_evolve)
instance.parameters.epsilon_squared = (0.01 | nbody_system.length)**2
instance.particles.add_particles(particles)
codeparticles1 = instance.particles
instance.particles.add_particle(
datamodel.Particle(position=[0, 1, 2] | nbody_system.length,
velocity=[0, 0, 0] | nbody_system.speed,
radius=0.005 | nbody_system.length,
mass=1 | nbody_system.mass))
codeparticles2 = instance.particles
self.assertTrue(codeparticles1 is codeparticles2)
instance.cleanup_code()
codeparticles3 = instance.particles
self.assertFalse(codeparticles1 is codeparticles3)
instance.stop()
def test20(self):
particles = datamodel.Particles(2)
particles.x = [0.0,10.0] | nbody_system.length
particles.y = 0.0 | nbody_system.length
particles.z = 0.0 | nbody_system.length
particles.radius = 0.005 | nbody_system.length
particles.vx = 0.0 | nbody_system.speed
particles.vy = 0.0 | nbody_system.speed
particles.vz = 0.0 | nbody_system.speed
particles.mass = 1.0 | nbody_system.mass
very_short_time_to_evolve = 1 | units.s
very_long_time_to_evolve = 1e9 | nbody_system.time
instance = BHTree()
instance.initialize_code()
instance.parameters.stopping_conditions_timeout = very_short_time_to_evolve
self.assertEquals(instance.parameters.stopping_conditions_timeout, very_short_time_to_evolve)
instance.parameters.epsilon_squared = (0.01 | nbody_system.length)**2
instance.particles.add_particles(particles)
codeparticles1 = instance.particles
instance.particles.add_particle(datamodel.Particle(
position = [0,1,2] | nbody_system.length,
velocity = [0,0,0] | nbody_system.speed,
radius = 0.005 | nbody_system.length,
mass = 1 | nbody_system.mass
))
codeparticles2 = instance.particles
self.assertTrue(codeparticles1 is codeparticles2)
instance.cleanup_code()
codeparticles3 = instance.particles
self.assertFalse(codeparticles1 is codeparticles3)
instance.stop()
def test2(self):
#not completed
convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun,
149.5e6 | units.km)
instance = BHTree(convert_nbody)
#instance.dt_dia = 1
instance.parameters.epsilon_squared = 0.001 | units.AU**2
#instance.timestep = 0.0001
#instance.use_self_gravity = 0
instance.commit_parameters()
stars = datamodel.Stars(2)
sun = stars[0]
sun.mass = units.MSun(1.0)
sun.position = units.m(numpy.array((0.0, 0.0, 0.0)))
sun.velocity = units.ms(numpy.array((0.0, 0.0, 0.0)))
sun.radius = units.RSun(1.0)
earth = stars[1]
earth.mass = units.kg(5.9736e24)
earth.radius = units.km(6371)
earth.position = units.km(numpy.array((149.5e6, 0.0, 0.0)))
earth.velocity = units.ms(numpy.array((0.0, 29800, 0.0)))
instance.particles.add_particles(stars)
instance.commit_particles()
self.assertAlmostRelativeEquals(sun.radius,
instance.particles[0].radius)
for x in range(1, 2000, 10):
instance.evolve_model(x | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
stars.savepoint()
if HAS_MATPLOTLIB:
figure = pyplot.figure()
plot = figure.add_subplot(1, 1, 1)
x_points = earth.get_timeline_of_attribute("x")
y_points = earth.get_timeline_of_attribute("y")
x_points_in_AU = map(lambda (t, x): x.value_in(units.AU), x_points)
y_points_in_AU = map(lambda (t, x): x.value_in(units.AU), y_points)
plot.scatter(x_points_in_AU, y_points_in_AU, color="b", marker='o')
plot.set_xlim(-1.5, 1.5)
plot.set_ylim(-1.5, 1.5)
test_results_path = self.get_path_to_results()
output_file = os.path.join(test_results_path,
"bhtree-earth-sun.svg")
figure.savefig(output_file)
instance.cleanup_code()
instance.stop()
def test2(self):
#not completed
convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km)
instance = BHTree(convert_nbody)
#instance.dt_dia = 1
instance.parameters.epsilon_squared = 0.001 | units.AU**2
#instance.timestep = 0.0001
#instance.use_self_gravity = 0
instance.commit_parameters()
stars = datamodel.Stars(2)
sun = stars[0]
sun.mass = units.MSun(1.0)
sun.position = units.m(numpy.array((0.0,0.0,0.0)))
sun.velocity = units.ms(numpy.array((0.0,0.0,0.0)))
sun.radius = units.RSun(1.0)
earth = stars[1]
earth.mass = units.kg(5.9736e24)
earth.radius = units.km(6371)
earth.position = units.km(numpy.array((149.5e6,0.0,0.0)))
earth.velocity = units.ms(numpy.array((0.0,29800,0.0)))
instance.particles.add_particles(stars)
instance.commit_particles()
self.assertAlmostRelativeEquals(sun.radius, instance.particles[0].radius)
for x in range(1,2000,10):
instance.evolve_model(x | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
stars.savepoint()
if HAS_MATPLOTLIB:
figure = pyplot.figure()
plot = figure.add_subplot(1,1,1)
x_points = earth.get_timeline_of_attribute("x")
y_points = earth.get_timeline_of_attribute("y")
x_points_in_AU = map(lambda (t,x) : x.value_in(units.AU), x_points)
y_points_in_AU = map(lambda (t,x) : x.value_in(units.AU), y_points)
plot.scatter(x_points_in_AU,y_points_in_AU, color = "b", marker = 'o')
plot.set_xlim(-1.5, 1.5)
plot.set_ylim(-1.5, 1.5)
test_results_path = self.get_path_to_results()
output_file = os.path.join(test_results_path, "bhtree-earth-sun.svg")
figure.savefig(output_file)
instance.cleanup_code()
instance.stop()
def test1(self):
convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun,
149.5e6 | units.km)
instance = BHTree(convert_nbody)
instance.parameters.epsilon_squared = 0.001 | units.AU**2
stars = datamodel.Stars(2)
sun = stars[0]
sun.mass = units.MSun(1.0)
sun.position = [0.0, 0.0, 0.0] | units.m
sun.velocity = [0.0, 0.0, 0.0] | units.ms
sun.radius = units.RSun(1.0)
earth = stars[1]
earth.mass = units.kg(5.9736e24)
earth.radius = units.km(6371)
earth.position = [149.5e6, 0.0, 0.0] | units.km
earth.velocity = [0.0, 29800, 0.0] | units.ms
#instance.particles.add_particles(stars)
instance.particles.add_particles(stars)
postion_at_start = earth.position.value_in(units.AU)[0]
instance.evolve_model(365.0 | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
postion_after_full_rotation = earth.position.value_in(units.AU)[0]
self.assertAlmostEqual(postion_at_start, postion_after_full_rotation,
3)
instance.evolve_model(365.0 + (365.0 / 2) | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
postion_after_half_a_rotation = earth.position.value_in(units.AU)[0]
self.assertAlmostEqual(-postion_at_start,
postion_after_half_a_rotation, 2)
instance.evolve_model(365.0 + (365.0 / 2) + (365.0 / 4) | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
postion_after_half_a_rotation = earth.position.value_in(units.AU)[1]
self.assertAlmostEqual(-postion_at_start,
postion_after_half_a_rotation, 1)
instance.cleanup_code()
instance.stop()
def test1(self):
convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km)
instance = BHTree(convert_nbody)
instance.parameters.epsilon_squared = 0.001 | units.AU**2
stars = datamodel.Stars(2)
sun = stars[0]
sun.mass = units.MSun(1.0)
sun.position = [0.0,0.0,0.0] | units.m
sun.velocity = [0.0,0.0,0.0] | units.ms
sun.radius = units.RSun(1.0)
earth = stars[1]
earth.mass = units.kg(5.9736e24)
earth.radius = units.km(6371)
earth.position = [149.5e6, 0.0, 0.0] | units.km
earth.velocity = [0.0, 29800, 0.0] | units.ms
#instance.particles.add_particles(stars)
instance.particles.add_particles(stars)
postion_at_start = earth.position.value_in(units.AU)[0]
instance.evolve_model(365.0 | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
postion_after_full_rotation = earth.position.value_in(units.AU)[0]
self.assertAlmostEqual(postion_at_start, postion_after_full_rotation, 3)
instance.evolve_model(365.0 + (365.0 / 2) | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
postion_after_half_a_rotation = earth.position.value_in(units.AU)[0]
self.assertAlmostEqual(-postion_at_start, postion_after_half_a_rotation, 2)
instance.evolve_model(365.0 + (365.0 / 2) + (365.0 / 4) | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
postion_after_half_a_rotation = earth.position.value_in(units.AU)[1]
self.assertAlmostEqual(-postion_at_start, postion_after_half_a_rotation, 1)
instance.cleanup_code()
instance.stop()
def test5(self):
instance = BHTree()
instance.commit_parameters()
index = instance.new_particle(
15.0 | nbody_system.mass,
10.0 | nbody_system.length, 20.0 | nbody_system.length, 30.0 | nbody_system.length,
1.0 | nbody_system.speed, 1.0 | nbody_system.speed, 3.0 | nbody_system.speed,
10.0 | nbody_system.length
)
instance.commit_particles()
self.assertEquals(instance.get_mass(index), 15.0| nbody_system.mass)
self.assertEquals(instance.get_radius(index), 10.0| nbody_system.length)
instance.cleanup_code()
instance.stop()
def test5(self):
instance = BHTree()
instance.commit_parameters()
index = instance.new_particle(
15.0 | nbody_system.mass, 10.0 | nbody_system.length,
20.0 | nbody_system.length, 30.0 | nbody_system.length,
1.0 | nbody_system.speed, 1.0 | nbody_system.speed,
3.0 | nbody_system.speed, 10.0 | nbody_system.length)
instance.commit_particles()
self.assertEquals(instance.get_mass(index), 15.0 | nbody_system.mass)
self.assertEquals(instance.get_radius(index),
10.0 | nbody_system.length)
instance.cleanup_code()
instance.stop()
def test4(self):
convert_nbody = nbody_system.nbody_to_si(5.0 | units.kg, 10.0 | units.m)
instance = BHTree(convert_nbody)
instance.commit_parameters()
index = instance.new_particle(
15.0 | units.kg,
10.0 | units.m, 20.0 | units.m, 30.0 | units.m,
#1.0 | units.m/units.s, 1.0 | units.m/units.s, 3.0 | units.m/units.s
0.0 | units.m/units.s, 0.0 | units.m/units.s, 0.0 | units.m/units.s,
10.0 | units.m
)
instance.commit_particles()
self.assertEquals(instance.get_mass(index), 15.0| units.kg)
self.assertEquals(instance.get_radius(index), 10.0| units.m)
instance.cleanup_code()
instance.stop()
def test9(self):
instance = BHTree()
instance.initialize_code()
instance.parameters.epsilon_squared = 0.00001 | nbody_system.length**2
particles = datamodel.Particles(2)
particles.mass = [1.0, 1.0] | nbody_system.mass
particles.radius = [0.0001, 0.0001] | nbody_system.length
particles.position = [[0.0, 0.0, 0.0], [2.0, 0.0, 0.0]
] | nbody_system.length
particles.velocity = [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0]
] | nbody_system.speed
instance.particles.add_particles(particles)
zero = 0.0 | nbody_system.length
fx, fy, fz = instance.get_gravity_at_point(zero,
1.0 | nbody_system.length,
zero, zero)
self.assertAlmostEqual(fx, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fy, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fz, 0.0 | nbody_system.acceleration, 3)
for x in (0.25, 0.5, 0.75):
x0 = x | nbody_system.length
x1 = (2.0 - x) | nbody_system.length
potential0 = instance.get_potential_at_point(zero, x0, zero, zero)
potential1 = instance.get_potential_at_point(zero, x1, zero, zero)
fx0, fy0, fz0 = instance.get_gravity_at_point(zero, x0, zero, zero)
fx1, fy1, fz1 = instance.get_gravity_at_point(zero, x1, zero, zero)
self.assertAlmostEqual(fy0, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fz0, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fy1, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fz1, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fx0, -1.0 * fx1, 5)
fx = (-1.0 / (x0**2) + 1.0 /
(x1**2)) * (1.0
| nbody_system.length**3 / nbody_system.time**2)
self.assertAlmostEqual(fx, fx0, 2)
self.assertAlmostEqual(potential0, potential1, 5)
instance.cleanup_code()
instance.stop()
def test6(self):
convert_nbody = nbody_system.nbody_to_si(5.0 | units.kg, 10.0 | units.m)
instance = BHTree(convert_nbody)
instance.commit_parameters()
indices = instance.new_particle(
[15.0, 30.0] | units.kg,
[10.0, 20.0] | units.m, [20.0, 40.0] | units.m, [30.0, 50.0] | units.m,
#1.0 | units.m/units.s, 1.0 | units.m/units.s, 3.0 | units.m/units.s
[0.0, 0.01] | units.m/units.s, [0.0, 0.01] | units.m/units.s, [0.0, 0.01] | units.m/units.s,
[10.0, 20.0] | units.m
)
instance.commit_particles()
self.assertEquals(instance.get_mass(indices[0]), 15.0| units.kg)
self.assertEquals(instance.get_mass(indices)[0], 15.0| units.kg)
self.assertRaises(AmuseException, instance.get_mass, [4,5],
expected_message = "Error when calling 'get_mass' of a 'BHTree', errorcode is -1")
instance.cleanup_code()
instance.stop()
def test4(self):
convert_nbody = nbody_system.nbody_to_si(5.0 | units.kg,
10.0 | units.m)
instance = BHTree(convert_nbody)
instance.commit_parameters()
index = instance.new_particle(
15.0 | units.kg,
10.0 | units.m,
20.0 | units.m,
30.0 | units.m,
#1.0 | units.m/units.s, 1.0 | units.m/units.s, 3.0 | units.m/units.s
0.0 | units.m / units.s,
0.0 | units.m / units.s,
0.0 | units.m / units.s,
10.0 | units.m)
instance.commit_particles()
self.assertEquals(instance.get_mass(index), 15.0 | units.kg)
self.assertEquals(instance.get_radius(index), 10.0 | units.m)
instance.cleanup_code()
instance.stop()
def test9(self):
instance = BHTree()
instance.initialize_code()
instance.parameters.epsilon_squared = 0.00001 | nbody_system.length**2
particles = datamodel.Particles(2)
particles.mass = [1.0, 1.0] | nbody_system.mass
particles.radius = [0.0001, 0.0001] | nbody_system.length
particles.position = [[0.0,0.0,0.0], [2.0,0.0,0.0]] | nbody_system.length
particles.velocity = [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0]] | nbody_system.speed
instance.particles.add_particles(particles)
zero = 0.0 | nbody_system.length
fx, fy, fz = instance.get_gravity_at_point(zero, 1.0 | nbody_system.length, zero, zero)
self.assertAlmostEqual(fx, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fy, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fz, 0.0 | nbody_system.acceleration, 3)
for x in (0.25, 0.5, 0.75):
x0 = x | nbody_system.length
x1 = (2.0 - x) | nbody_system.length
potential0 = instance.get_potential_at_point(zero, x0, zero, zero)
potential1 = instance.get_potential_at_point(zero, x1, zero, zero)
fx0, fy0, fz0 = instance.get_gravity_at_point(zero, x0, zero, zero)
fx1, fy1, fz1 = instance.get_gravity_at_point(zero, x1, zero, zero)
self.assertAlmostEqual(fy0, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fz0, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fy1, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fz1, 0.0 | nbody_system.acceleration, 3)
self.assertAlmostEqual(fx0, -1.0 * fx1, 5)
fx = (-1.0 / (x0**2) + 1.0 / (x1**2)) * (1.0 | nbody_system.length ** 3 / nbody_system.time ** 2)
self.assertAlmostEqual(fx, fx0, 2)
self.assertAlmostEqual(potential0, potential1, 5)
instance.cleanup_code()
instance.stop()
def test3(self):
convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun,
149.5e6 | units.km)
instance = BHTree(convert_nbody)
#instance.dt_dia = 1
instance.parameters.epsilon_squared = 0.001 | units.AU**2
#instance.timestep = 0.0001
#instance.use_self_gravity = 0
instance.commit_parameters()
stars = datamodel.Stars(2)
star1 = stars[0]
star2 = stars[1]
star1.mass = units.MSun(1.0)
star1.position = units.AU(numpy.array((-.10, 0.0, 0.0)))
star1.velocity = units.AUd(numpy.array((0.0, 0.0, 0.0)))
star1.radius = units.RSun(1.0)
star2.mass = units.MSun(1.0)
star2.position = units.AU(numpy.array((.10, 0.0, 0.0)))
star2.velocity = units.AUd(numpy.array((0.0, 0.0, 0.0)))
star2.radius = units.RSun(100.0)
instance.particles.add_particles(stars)
instance.commit_particles()
for x in range(1, 200, 1):
instance.evolve_model(x | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
#instance.get_indices_of_colliding_particles()
#print stars[0].position-stars[1].position
stars.savepoint()
instance.cleanup_code()
instance.stop()
def test3(self):
convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km)
instance = BHTree(convert_nbody)
#instance.dt_dia = 1
instance.parameters.epsilon_squared = 0.001 | units.AU**2
#instance.timestep = 0.0001
#instance.use_self_gravity = 0
instance.commit_parameters()
stars = datamodel.Stars(2)
star1 = stars[0]
star2 = stars[1]
star1.mass = units.MSun(1.0)
star1.position = units.AU(numpy.array((-.10,0.0,0.0)))
star1.velocity = units.AUd(numpy.array((0.0,0.0,0.0)))
star1.radius = units.RSun(1.0)
star2.mass = units.MSun(1.0)
star2.position = units.AU(numpy.array((.10,0.0,0.0)))
star2.velocity = units.AUd(numpy.array((0.0,0.0,0.0)))
star2.radius = units.RSun(100.0)
instance.particles.add_particles(stars)
instance.commit_particles()
for x in range(1,200,1):
instance.evolve_model(x | units.day)
instance.particles.copy_values_of_all_attributes_to(stars)
#instance.get_indices_of_colliding_particles()
#print stars[0].position-stars[1].position
stars.savepoint()
instance.cleanup_code()
instance.stop()
