def test4(self):
print "Testing Halogen generate_particles"
number_of_particles = 100
instance = Halogen(**default_options)
instance.initialize_code()
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
instance.commit_parameters()
instance.generate_particles()
self.assertEquals(len(instance.particles), number_of_particles)
self.assertAlmostEquals(instance.particles.total_mass(),
1.0 | nbody_system.mass)
self.assertAlmostEquals(instance.particles.kinetic_energy(),
0.17345836639 | nbody_system.energy)
self.assertAlmostEquals(
instance.particles.potential_energy(G=nbody_system.G),
-0.310395778644 | nbody_system.energy)
self.assertAlmostEquals(instance.particles.virial_radius(),
1.61084664935 | nbody_system.length)
instance.cleanup_code()
instance.stop()
def test7(self):
print "Testing Halogen error handling"
number_of_particles = 1000
instance = Halogen(**default_options)
instance.initialize_code()
self.assertRaises(exceptions.AmuseException, instance.commit_parameters, expected_message =
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'")
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 5.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
self.assertRaises(exceptions.AmuseException, instance.commit_parameters, expected_message =
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'")
instance.parameters.gamma = -0.5
self.assertRaises(exceptions.AmuseException, instance.commit_parameters, expected_message =
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'")
instance.parameters.gamma = 0.0
instance.parameters.beta = 2.0
self.assertRaises(exceptions.AmuseException, instance.commit_parameters, expected_message =
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'")
instance.parameters.beta = 5.0
instance.commit_parameters()
instance.cleanup_code()
instance.stop()
def test6(self):
print "Testing Halogen state"
number_of_particles = 1000
print "First do everything manually:"
instance = Halogen(**default_options)
self.assertEquals(instance.get_name_of_current_state(),
'UNINITIALIZED')
instance.initialize_code()
self.assertEquals(instance.get_name_of_current_state(), 'INITIALIZED')
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
instance.commit_parameters()
self.assertEquals(instance.get_name_of_current_state(), 'EDIT')
instance.overridden().generate_particles()
self.assertEquals(instance.get_name_of_current_state(), 'UPDATE')
instance.invoke_state_change_updated()
self.assertEquals(instance.get_name_of_current_state(), 'RUN')
self.assertEquals(len(instance.particles), number_of_particles)
instance.cleanup_code()
self.assertEquals(instance.get_name_of_current_state(), 'END')
instance.stop()
print "initialize_code(), (re)commit_parameters(), update_particle_set(), " \
"and cleanup_code() should be called automatically:"
instance = Halogen(**default_options)
self.assertEquals(instance.get_name_of_current_state(),
'UNINITIALIZED')
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
self.assertEquals(instance.get_name_of_current_state(), 'INITIALIZED')
self.assertEquals(instance.get_number_of_particles_updated(), 0)
self.assertEquals(instance.get_name_of_current_state(), 'EDIT')
instance.parameters.random_seed = 2
self.assertEquals(instance.get_name_of_current_state(),
'CHANGE_PARAMETERS_EDIT')
self.assertEquals(instance.get_number_of_particles_updated(), 0)
self.assertEquals(instance.get_name_of_current_state(), 'EDIT')
instance.generate_particles()
self.assertEquals(instance.get_name_of_current_state(), 'RUN')
self.assertEquals(len(instance.particles), number_of_particles)
self.assertEquals(instance.get_number_of_particles_updated(), 0)
instance.stop()
self.assertEquals(instance.get_name_of_current_state(), 'STOPPED')
def initialize_galaxy_model(N, converter):
#default_options = dict(redirection = "none")
instance = Halogen(converter)
instance.initialize_code()
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = N
instance.parameters.random_seed = 1
instance.commit_parameters()
instance.generate_particles()
galaxy = instance.particles.copy()
instance.cleanup_code()
instance.stop()
return galaxy
def initialize_galaxy_model(N, converter):
#default_options = dict(redirection = "none")
instance = Halogen(converter)
instance.initialize_code()
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = N
instance.parameters.random_seed = 1
instance.commit_parameters()
instance.generate_particles()
galaxy = instance.particles.copy()
instance.cleanup_code()
instance.stop()
return galaxy
def test6(self):
print "Testing Halogen state"
number_of_particles = 1000
print "First do everything manually:"
instance = Halogen(**default_options)
self.assertEquals(instance.get_name_of_current_state(), 'UNINITIALIZED')
instance.initialize_code()
self.assertEquals(instance.get_name_of_current_state(), 'INITIALIZED')
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
instance.commit_parameters()
self.assertEquals(instance.get_name_of_current_state(), 'EDIT')
instance.overridden().generate_particles()
self.assertEquals(instance.get_name_of_current_state(), 'UPDATE')
instance.invoke_state_change_updated()
self.assertEquals(instance.get_name_of_current_state(), 'RUN')
self.assertEquals(len(instance.particles), number_of_particles)
instance.cleanup_code()
self.assertEquals(instance.get_name_of_current_state(), 'END')
instance.stop()
print "initialize_code(), (re)commit_parameters(), update_particle_set(), " \
"and cleanup_code() should be called automatically:"
instance = Halogen(**default_options)
self.assertEquals(instance.get_name_of_current_state(), 'UNINITIALIZED')
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
self.assertEquals(instance.get_name_of_current_state(), 'INITIALIZED')
self.assertEquals(instance.get_number_of_particles_updated(), 0)
self.assertEquals(instance.get_name_of_current_state(), 'EDIT')
instance.parameters.random_seed = 2
self.assertEquals(instance.get_name_of_current_state(), 'CHANGE_PARAMETERS_EDIT')
self.assertEquals(instance.get_number_of_particles_updated(), 0)
self.assertEquals(instance.get_name_of_current_state(), 'EDIT')
instance.generate_particles()
self.assertEquals(instance.get_name_of_current_state(), 'RUN')
self.assertEquals(len(instance.particles), number_of_particles)
self.assertEquals(instance.get_number_of_particles_updated(), 0)
instance.stop()
self.assertEquals(instance.get_name_of_current_state(), 'STOPPED')
def test7(self):
print "Testing Halogen error handling"
number_of_particles = 1000
instance = Halogen(**default_options)
instance.initialize_code()
self.assertRaises(
exceptions.AmuseException,
instance.commit_parameters,
expected_message=
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'"
)
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 5.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
self.assertRaises(
exceptions.AmuseException,
instance.commit_parameters,
expected_message=
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'"
)
instance.parameters.gamma = -0.5
self.assertRaises(
exceptions.AmuseException,
instance.commit_parameters,
expected_message=
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'"
)
instance.parameters.gamma = 0.0
instance.parameters.beta = 2.0
self.assertRaises(
exceptions.AmuseException,
instance.commit_parameters,
expected_message=
"Error when calling 'commit_parameters' of a 'Halogen', errorcode is -2, error is "
"'Missing or bad parameter for halo (see amuse/community/halogen/src/doc for details on required parameters).'"
)
instance.parameters.beta = 5.0
instance.commit_parameters()
instance.cleanup_code()
instance.stop()
def test5(self):
print "Testing Halogen generate_particles: generate multiple sets"
number_of_particles = 1000
instance = Halogen(**default_options)
instance.initialize_code()
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
instance.commit_parameters()
instance.generate_particles()
set1 = instance.particles.copy()
self.assertEquals(len(set1), number_of_particles)
instance.parameters.random_seed = 1
instance.generate_particles()
set2 = instance.particles.copy()
self.assertEquals(len(set2), number_of_particles)
# Since a (any would do!) parameter was changed, recommit_parameters was
# called, re-seeding, and the result should be the same:
for attribute in ["mass", "x", "y", "z", "vx", "vy", "vz"]:
self.assertEquals(getattr(set1, attribute),
getattr(set2, attribute))
instance.generate_particles()
# No parameter change: draw the next random set of particles
set3 = instance.particles.copy()
self.assertEquals(len(set3), number_of_particles)
self.assertEquals(set1.mass, set3.mass)
self.assertRaises(self.failureException, self.assertEquals, set1.x,
set3.x)
self.assertIsOfOrder(abs(set1.x).median(), abs(set3.x).median(), 1)
self.assertAlmostEquals(
abs(set1.vy).median(),
abs(set3.vy).median(), 1)
instance.cleanup_code()
instance.stop()
def test4(self):
print "Testing Halogen generate_particles"
number_of_particles = 100
instance = Halogen(**default_options)
instance.initialize_code()
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
instance.commit_parameters()
instance.generate_particles()
self.assertEquals(len(instance.particles), number_of_particles)
self.assertAlmostEquals(instance.particles.total_mass(), 1.0 | nbody_system.mass)
self.assertAlmostEquals(instance.particles.kinetic_energy(),
0.17345836639 | nbody_system.energy)
self.assertAlmostEquals(instance.particles.potential_energy(G = nbody_system.G),
-0.310395778644 | nbody_system.energy)
self.assertAlmostEquals(instance.particles.virial_radius(),
1.61084664935 | nbody_system.length)
instance.cleanup_code()
instance.stop()
def initialize_nfw_model(N,
mass=1.77e12,
scale_radius=24.6,
cutoff_mod=15.,
outfile=None):
'''mass in Msun
radius in Kpc
Halogen: M Zemp et al. 2008
default_options = dict(redirection = "none")
NFW = (1,3,1)
need cutoff for beta <=3, gamma must be <3'''
mass = mass | units.MSun
scale_radius = scale_radius | units.kpc
converter = nbody_system.nbody_to_si(mass, scale_radius)
instance = Halogen(converter)
instance.initialize_code()
instance.parameters.alpha = 1.0
instance.parameters.beta = 3.0
instance.parameters.gamma = 1.0
instance.parameters.scale_radius = scale_radius
instance.parameters.cutoff_radius = cutoff_mod * instance.parameters.scale_radius
instance.parameters.number_of_particles = N
instance.parameters.random_seed = 1
instance.commit_parameters()
instance.generate_particles()
stars = instance.particles.copy()
instance.cleanup_code()
instance.stop_reusable_channels()
instance.stop()
if outfile is not None:
amuse.io.write_set_to_file(stars, outfile, format='csv')
return stars, converter
def test5(self):
print "Testing Halogen generate_particles: generate multiple sets"
number_of_particles = 1000
instance = Halogen(**default_options)
instance.initialize_code()
instance.parameters.alpha = 2.0
instance.parameters.beta = 5.0
instance.parameters.gamma = 0.0
instance.parameters.number_of_particles = number_of_particles
instance.parameters.random_seed = 1
instance.commit_parameters()
instance.generate_particles()
set1 = instance.particles.copy()
self.assertEquals(len(set1), number_of_particles)
instance.parameters.random_seed = 1
instance.generate_particles()
set2 = instance.particles.copy()
self.assertEquals(len(set2), number_of_particles)
# Since a (any would do!) parameter was changed, recommit_parameters was
# called, re-seeding, and the result should be the same:
for attribute in ["mass", "x", "y", "z", "vx", "vy", "vz"]:
self.assertEquals(getattr(set1, attribute), getattr(set2, attribute))
instance.generate_particles()
# No parameter change: draw the next random set of particles
set3 = instance.particles.copy()
self.assertEquals(len(set3), number_of_particles)
self.assertEquals(set1.mass, set3.mass)
self.assertRaises(self.failureException, self.assertEquals, set1.x, set3.x)
self.assertIsOfOrder(abs(set1.x).median(), abs(set3.x).median(), 1)
self.assertAlmostEquals(abs(set1.vy).median(), abs(set3.vy).median(), 1)
instance.cleanup_code()
instance.stop()
