def make_plots(all_particles, disk_only, i=0):
for j, particles in enumerate([all_particles, disk_only]):
if HAS_PYNBODY:
temp_particles = particles.copy()
temp_particles.u = 1 | units.ms**2
temp = Gadget2()
temp.gas_particles.add_particles(temp_particles)
temp.commit_particles()
pynbody_column_density_plot(temp.gas_particles,
width=300 | units.kpc,
units='m_p cm^-2',
vmin=17,
vmax=23)
temp.stop()
else:
native_plot.gca().set_aspect("equal")
native_plot.xlim(-150, 150)
native_plot.ylim(-150, 150)
plot(particles.x.as_quantity_in(units.kpc),
particles.y.as_quantity_in(units.kpc), 'r.')
native_plot.savefig(
os.path.join(
"plots", "plot_galaxy_merger_{0}_{1:=04}.png".format(
"disk" if j else "total", i)))
native_plot.close()
def make_plots(all_particles, disk_only, i=0):
for j, particles in enumerate([all_particles, disk_only]):
if HAS_PYNBODY:
temp_particles = particles.copy()
temp_particles.u = 1 | units.ms**2
temp = Gadget2()
temp.gas_particles.add_particles(temp_particles)
temp.commit_particles()
pynbody_column_density_plot(
temp.gas_particles, width=300 | units.kpc, units='m_p cm^-2',
vmin=17, vmax=23)
temp.stop()
else:
native_plot.gca().set_aspect("equal")
native_plot.xlim(-150, 150)
native_plot.ylim(-150, 150)
plot(particles.x.as_quantity_in(units.kpc),
particles.y.as_quantity_in(units.kpc), 'r.')
native_plot.savefig(
os.path.join(
"plots",
"plot_galaxy_merger_{0}_{1:=04}.png".format(
"disk" if j else "total", i)
)
)
native_plot.close()
def group_plot(groups, no_group, figname="group_plot.png"):
colors = ["r", "g", "b", "y", "k", "w"]*100
for group, color in zip(groups, colors):
scatter(group.x, group.y, c=color)
if len(no_group):
scatter(no_group.x, no_group.y, c="m", marker="s")
native_plot.gca().set_aspect("equal", adjustable = "datalim")
native_plot.savefig(figname)
native_plot.clf()
def group_plot(groups, no_group, figname="group_plot.png"):
colors = ["r", "g", "b", "y", "k", "w"] * 100
for group, color in zip(groups, colors):
scatter(group.x, group.y, c=color)
if len(no_group):
scatter(no_group.x, no_group.y, c="m", marker="s")
native_plot.gca().set_aspect("equal", adjustable="datalim")
native_plot.savefig(figname)
native_plot.clf()
def monitor_density_profile(system, i_step, time, n_steps, memory=Memory()):
if i_step == 0:
memory.xlimits = (None, None)
memory.ylimits = (None, None)
position = system.gas_particles.position - system.gas_particles.center_of_mass()
loglog(position.lengths_squared(), system.gas_particles.density, 'gs')
native_plot.title("{0}: t={1}".format(i_step, time.as_quantity_in(units.yr)))
native_plot.xlim(memory.xlimits)
native_plot.ylim(memory.ylimits)
native_plot.pause(0.0001)
memory.xlimits = native_plot.gca().get_xlim()
memory.ylimits = native_plot.gca().get_ylim()
if i_step == n_steps-1:
native_plot.show(block=True)
native_plot.cla()
def planetplot():
sun, planets = new_solar_system_for_mercury()
initial = 12.2138 | units.Gyr
final = 12.3300 | units.Gyr
step = 10000.0 | units.yr
timerange = VectorQuantity.arange(initial, final, step)
gd = MercuryWayWard()
gd.initialize_code()
# gd.stopping_conditions.timeout_detection.disable()
gd.central_particle.add_particles(sun)
gd.orbiters.add_particles(planets)
gd.commit_particles()
se = SSE()
# se.initialize_code()
se.commit_parameters()
se.particles.add_particles(sun)
se.commit_particles()
channelp = gd.orbiters.new_channel_to(planets)
channels = se.particles.new_channel_to(sun)
for time in timerange:
err = gd.evolve_model(time-initial)
channelp.copy()
# planets.savepoint(time)
err = se.evolve_model(time)
channels.copy()
gd.central_particle.mass = sun.mass
print(
sun[0].mass.value_in(units.MSun),
time.value_in(units.Myr),
planets[4].x.value_in(units.AU),
planets[4].y.value_in(units.AU),
planets[4].z.value_in(units.AU)
)
gd.stop()
se.stop()
for planet in planets:
t, x = planet.get_timeline_of_attribute_as_vector("x")
t, y = planet.get_timeline_of_attribute_as_vector("y")
plot(x, y, '.')
native_plot.gca().set_aspect('equal')
native_plot.show()
def polyevolve():
sun, planets = Solarsystem.new_solarsystem()
gd, se = setup_codes(sun, planets)
channelp = gd.orbiters.new_channel_to(planets)
channels = se.particles.new_channel_to(sun)
prev_mass = sun[0].mass
massrange = units.MSun(numpy.arange(0.9, 0.89999, -1e-9))
masses = [] | units.MSun
timerange = [] | units.Myr
for i, mass in enumerate(massrange):
time, dummymass = se.evolve_mass(mass)
if i == 0:
initialtime = time
print(time, mass, "evolving gd")
gdtime = time - initialtime
print(gdtime)
err = gd.evolve_model(gdtime)
channelp.copy()
planets.savepoint(time)
channels.copy()
gd.central_particle.mass = sun[0].mass
print(sun[0].mass)
print(
sun[0].mass.value_in(units.MSun),
time.value_in(units.Myr),
planets[4].x.value_in(units.AU),
planets[4].y.value_in(units.AU),
planets[4].z.value_in(units.AU),
)
gd.stop()
se.stop()
for planet in planets:
t, x = planet.get_timeline_of_attribute_as_vector("x")
t, y = planet.get_timeline_of_attribute_as_vector("y")
t, z = planet.get_timeline_of_attribute_as_vector("z")
plot3(x, y, z, '.')
native_plot.gca().set_aspect('equal')
native_plot.show()
def polyevolve():
sun, planets = Solarsystem.new_solarsystem()
gd, se = setup_codes(sun, planets)
channelp = gd.orbiters.new_channel_to(planets)
channels = se.particles.new_channel_to(sun)
prev_mass = sun[0].mass
massrange = units.MSun(numpy.arange(0.9, 0.89999, -1e-9))
masses = [] | units.MSun
timerange = [] | units.Myr
for i, mass in enumerate(massrange):
time, dummymass = se.evolve_mass(mass)
if i == 0:
initialtime = time
print time, mass, "evolving gd"
gdtime = time-initialtime
print gdtime
err = gd.evolve_model(gdtime)
channelp.copy()
planets.savepoint(time)
channels.copy()
gd.central_particle.mass = sun[0].mass
print sun[0].mass
print(
sun[0].mass.value_in(units.MSun),
time.value_in(units.Myr),
planets[4].x.value_in(units.AU),
planets[4].y.value_in(units.AU),
planets[4].z.value_in(units.AU),
)
gd.stop()
se.stop()
for planet in planets:
t, x = planet.get_timeline_of_attribute_as_vector("x")
t, y = planet.get_timeline_of_attribute_as_vector("y")
t, z = planet.get_timeline_of_attribute_as_vector("z")
plot3(x, y, z, '.')
native_plot.gca().set_aspect('equal')
native_plot.show()
def monitor_density_profile(system, i_step, time, n_steps, memory=Memory()):
if i_step == 0:
memory.xlimits = (None, None)
memory.ylimits = (None, None)
position = system.gas_particles.position - system.gas_particles.center_of_mass(
)
loglog(position.lengths_squared(), system.gas_particles.density, 'gs')
native_plot.title("{0}: t={1}".format(i_step,
time.as_quantity_in(units.yr)))
native_plot.xlim(memory.xlimits)
native_plot.ylim(memory.ylimits)
native_plot.pause(0.0001)
memory.xlimits = native_plot.gca().get_xlim()
memory.ylimits = native_plot.gca().get_ylim()
if i_step == n_steps - 1:
native_plot.show(block=True)
native_plot.cla()
def planetplot():
sun, planets = new_solar_system_for_mercury()
initial = 12.2138 | units.Gyr
final = 12.3300 | units.Gyr
step = 10000.0 | units.yr
timerange = VectorQuantity.arange(initial, final, step)
gd = MercuryWayWard()
gd.initialize_code()
# gd.stopping_conditions.timeout_detection.disable()
gd.central_particle.add_particles(sun)
gd.orbiters.add_particles(planets)
gd.commit_particles()
se = SSE()
# se.initialize_code()
se.commit_parameters()
se.particles.add_particles(sun)
se.commit_particles()
channelp = gd.orbiters.new_channel_to(planets)
channels = se.particles.new_channel_to(sun)
for time in timerange:
err = gd.evolve_model(time - initial)
channelp.copy()
# planets.savepoint(time)
err = se.evolve_model(time)
channels.copy()
gd.central_particle.mass = sun.mass
print(
(sun[0].mass.value_in(units.MSun), time.value_in(units.Myr),
planets[4].x.value_in(units.AU), planets[4].y.value_in(units.AU),
planets[4].z.value_in(units.AU)))
gd.stop()
se.stop()
for planet in planets:
t, x = planet.get_timeline_of_attribute_as_vector("x")
t, y = planet.get_timeline_of_attribute_as_vector("y")
plot(x, y, '.')
native_plot.gca().set_aspect('equal')
native_plot.show()