Python Hermite.evolve_model方法代码示例

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test13(self):
     particles = plummer.new_plummer_model(31)
    
     instance = Hermite(number_of_workers=1)#, debugger="xterm")
     instance.initialize_code()
     instance.parameters.epsilon_squared = 0.01 | nbody_system.length ** 2
     instance.particles.add_particles(particles)
     
     instance.evolve_model(0.1 | nbody_system.time)
     instance.synchronize_model()
     expected_positions = instance.particles.position
     instance.stop()
     positions_per_workers = []
     for n in [2,3,4,5]:
         instance = Hermite(number_of_workers=n)
         instance.initialize_code()
         instance.parameters.epsilon_squared = 0.01 | nbody_system.length ** 2
         instance.particles.add_particles(particles)
         
         instance.evolve_model(0.1 | nbody_system.time)
         instance.synchronize_model()
         positions_per_workers.append(instance.particles.position)
         instance.stop()
      
      
     for index, n in enumerate([2,3,4,5]):
         self.assertAlmostEqual(expected_positions, positions_per_workers[index], 15)

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
    def test3(self):
        convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km)

        instance = Hermite(convert_nbody)
        instance.initialize_code()
        instance.parameters.epsilon_squared = 0.00001 | units.AU**2
        instance.dt_dia = 5000
        
        stars = datamodel.Stars(2)
        star1 = stars[0]
        star2 = stars[1]

        star1.mass = units.MSun(1.0)
        star1.position = units.AU(numpy.array((-1.0,0.0,0.0)))
        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((1.0,0.0,0.0)))
        star2.velocity = units.AUd(numpy.array((0.0,0.0,0.0)))
        star2.radius = units.RSun(100.0)
        
        instance.particles.add_particles(stars)
    
        for x in range(1,2000,10):
            instance.evolve_model(x | units.day)
            instance.particles.copy_values_of_all_attributes_to(stars)
            stars.savepoint()
        
        instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
    def test18(self):
        particles = datamodel.Particles(2)
        particles.x = [0.0,1.0] | nbody_system.length
        particles.y = 0.0 | nbody_system.length
        particles.z = 0.0 | 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

        instance = Hermite()
        instance.particles.add_particles(particles) 
        instance.commit_particles()
        self.assertEquals(instance.particles[0].radius, 0.0 | nbody_system.length)
        instance.parameters.end_time_accuracy_factor = 1.0
        instance.evolve_model(0.1 | nbody_system.time)
        self.assertAlmostRelativeEquals(instance.model_time, 0.10563767746 |nbody_system.time, 5)
        instance.parameters.end_time_accuracy_factor = -1.0
        instance.evolve_model(0.3 | nbody_system.time)
        self.assertAlmostRelativeEquals(instance.model_time, 0.266758127609 |nbody_system.time, 5)
        instance.parameters.end_time_accuracy_factor = 0.0
        instance.evolve_model(0.4 | nbody_system.time)
        self.assertAlmostRelativeEquals(instance.model_time, 0.4 |nbody_system.time, 6)
        instance.parameters.end_time_accuracy_factor = -0.5
        instance.evolve_model(0.5 | nbody_system.time)
        self.assertAlmostRelativeEquals(instance.model_time, 0.48974930698 |nbody_system.time, 6)
        instance.parameters.end_time_accuracy_factor = +0.5
        instance.evolve_model(0.6 | nbody_system.time)
        self.assertAlmostRelativeEquals(instance.model_time, 0.6042733579 |nbody_system.time, 6)
        
        instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
    def evolve_model(self):
        convert_nbody = nbody_system.nbody_to_si(
            1.0 | units.MSun, 149.5e6 | units.km)

        hermite = Hermite(convert_nbody)
        hermite.initialize_code()

        hermite.parameters.epsilon_squared = 0.0 | units.AU**2

        stars = self.new_system_of_sun_and_earth()
        earth = stars[1]
        sun = stars[0]
        Earth = blender.Primitives.sphere(10, 10, 0.1)  # Make the earth avatar
        Sun = blender.Primitives.sphere(32, 32, 1)  # Make the sun avatar
        hermite.particles.add_particles(stars)

        for i in range(1*365):
            hermite.evolve_model(i | units.day)
            hermite.particles.copy_values_of_all_attributes_to(stars)
            # update avatar positions:
            Earth.loc = (
                    1*earth.position.value_in(units.AU)[0],
                    1*earth.position.value_in(units.AU)[1],
                    earth.position.value_in(units.AU)[2])
            Sun.loc = (
                    1*sun.position.value_in(units.AU)[0],
                    1*sun.position.value_in(units.AU)[1],
                    sun.position.value_in(units.AU)[2])
            blender.Redraw()

        hermite.print_refs()
        hermite.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
def simulate_system_until(particles, end_time):
    convert_nbody = nbody_system.nbody_to_si(
        1.0 | units.MSun, 149.5e6 | units.km)

    instance = Hermite(convert_nbody)
    instance.parameters.epsilon_squared = 0.0 | units.AU**2
    instance.particles.add_particles(particles)

    t0 = 0 | units.day
    dt = 10 | units.day
    t = t0
    earth = instance.particles[1]

    x_values = quantities.AdaptingVectorQuantity()
    y_values = quantities.AdaptingVectorQuantity()

    while t < end_time:
        instance.evolve_model(t)

        x_values.append(earth.x)
        y_values.append(earth.y)

        t += dt

    instance.stop()

    return x_values, y_values

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
def evolve_system(particles):
    """
    Evolves the system using the Hermite integrator.


    Parameters
    ----------
    particles: amuse.datamodel.particles.Particles instance

    """
    times = numpy.linspace(0.0001, args.time, args.steps) |u.yr

    intr = Hermite(nbody_to_si(particles.total_mass(), 1 | u.AU))
    intr.particles.add_particles(particles)

    energy_begin = intr.get_total_energy()

    if args.dt is not None:
        intr.set_dt_param(args.dt)

    for t in times:
        intr.evolve_model(t)
        energy_error = (intr.get_total_energy() - energy_begin)/energy_begin
        print(intr.get_time_step().in_(u.day), intr.get_time().in_(u.yr))
        print(energy_error)
      

    print("energy error:{}".format(energy_error))

    intr.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test8(self):
     print "Testing Hermite collision_detection"
     particles = datamodel.Particles(7)
     particles.mass = 0.001 | nbody_system.mass
     particles.radius = 0.01 | nbody_system.length
     particles.x = [-101.0, -100.0, -0.5, 0.5, 100.0, 101.0, 104.0] | nbody_system.length
     particles.y = 0 | nbody_system.length
     particles.z = 0 | nbody_system.length
     particles.velocity = [[2, 0, 0], [-2, 0, 0]]*3 + [[-4, 0, 0]] | nbody_system.speed
     
     instance = Hermite()
     instance.initialize_code()
     instance.parameters.set_defaults()
     instance.particles.add_particles(particles)
     collisions = instance.stopping_conditions.collision_detection
     collisions.enable()
     instance.evolve_model(1.0 | nbody_system.time)
     
     self.assertTrue(collisions.is_set())
     self.assertTrue(instance.model_time < 0.5 | nbody_system.time)
     self.assertEquals(len(collisions.particles(0)), 3)
     self.assertEquals(len(collisions.particles(1)), 3)
     self.assertEquals(len(particles - collisions.particles(0) - collisions.particles(1)), 1)
     self.assertEquals(abs(collisions.particles(0).x - collisions.particles(1).x) <= 
             (collisions.particles(0).radius + collisions.particles(1).radius),
             [True, True, True])
     
     sticky_merged = datamodel.Particles(len(collisions.particles(0)))
     sticky_merged.mass = collisions.particles(0).mass + collisions.particles(1).mass
     sticky_merged.radius = collisions.particles(0).radius
     for p1, p2, merged in zip(collisions.particles(0), collisions.particles(1), sticky_merged):
         merged.position = (p1 + p2).center_of_mass()
         merged.velocity = (p1 + p2).center_of_mass_velocity()
     
     print instance.model_time
     print instance.particles
     instance.particles.remove_particles(collisions.particles(0) + collisions.particles(1))
     instance.particles.add_particles(sticky_merged)
     
     instance.evolve_model(1.0 | nbody_system.time)
     print
     print instance.model_time
     print instance.particles
     self.assertTrue(collisions.is_set())
     self.assertTrue(instance.model_time < 1.0 | nbody_system.time)
     self.assertEquals(len(collisions.particles(0)), 1)
     self.assertEquals(len(collisions.particles(1)), 1)
     self.assertEquals(len(instance.particles - collisions.particles(0) - collisions.particles(1)), 2)
     self.assertEquals(abs(collisions.particles(0).x - collisions.particles(1).x) <= 
             (collisions.particles(0).radius + collisions.particles(1).radius),
             [True])
     instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
    def test19(self):
        particles = datamodel.Particles(2)
        particles.x = [0.0,200.0] | nbody_system.length
        particles.y = 0.0 | nbody_system.length
        particles.z = 0.0 | 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

        instance = Hermite()
        instance.particles.add_particles(particles) 
        instance.commit_particles()
        self.assertEquals(instance.particles[0].radius, 0.0 | nbody_system.length)
        instance.parameters.end_time_accuracy_factor = 0.0
        instance.evolve_model(0.1 | nbody_system.time)
        self.assertAlmostRelativeEquals(instance.model_time, 0.1 |nbody_system.time, 5)
       
        instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test23(self):
     hermite = Hermite()
     hermite.parameters.epsilon_squared = 0.0 | nbody_system.length**2
     
     particles = datamodel.Particles(1)
     particles.position = ([0,0,0] )| nbody_system.length
     particles.velocity = ([1,0,0] )| nbody_system.speed
     particles.radius = 0| nbody_system.length
     particles.mass = 0.1| nbody_system.mass
             
     hermite.particles.add_particles(particles)
     hermite.evolve_model(1 | nbody_system.time)
     print hermite.particles.x
     self.assertAlmostRelativeEquals(hermite.model_time, 1 | nbody_system.time)
     self.assertAlmostRelativeEquals(hermite.particles[0].x, 1 | nbody_system.length)
     hermite.evolve_model(1.5 | nbody_system.time)
     print hermite.particles.x
     self.assertAlmostRelativeEquals(hermite.model_time, 1.5 | nbody_system.time)
     self.assertAlmostRelativeEquals(hermite.particles[0].x, 1.5 | nbody_system.length)
     hermite.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test2(self):
     convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km)
 
     instance = Hermite(convert_nbody)
     instance.initialize_code()
     instance.parameters.epsilon_squared = 0.0 | units.AU**2
     instance.dt_dia = 5000
     
     stars = self.new_system_of_sun_and_earth()
     earth = stars[1]
     instance.particles.add_particles(stars)
     
     for x in range(1, 500, 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, "hermite-earth-sun2.svg")
         figure.savefig(output_file)
     
     
     
     instance.cleanup_code()
     instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test12(self):
     particles = datamodel.Particles(2)
     particles.x = [0.0,1.00] | nbody_system.length
     particles.y = [0.0,0.0] | nbody_system.length
     particles.z = [0.0,0.0] | nbody_system.length
     particles.radius = 0.005 | nbody_system.length
     particles.vx =  [5.1,0.0] | nbody_system.speed
     particles.vy =  [0.0,0.0] | nbody_system.speed
     particles.vz =  [0.0,0.0]| nbody_system.speed
     particles.mass = [0.1,0.1] | nbody_system.mass
    
     instance = Hermite()
     instance.initialize_code()
     instance.parameters.stopping_conditions_out_of_box_size = .5 | nbody_system.length
     self.assertEquals(instance.parameters.stopping_conditions_out_of_box_size, .5 | nbody_system.length)
     instance.particles.add_particles(particles) 
     instance.stopping_conditions.out_of_box_detection.enable()
     instance.evolve_model(0.1 | nbody_system.time)
     self.assertTrue(instance.stopping_conditions.out_of_box_detection.is_set())
     self.assertAlmostEqual(instance.stopping_conditions.out_of_box_detection.particles(0).x, 1.0 |nbody_system.length, 3)
     instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test10(self):
     convert_nbody = nbody_system.nbody_to_si(1.0 | units.MSun, 149.5e6 | units.km)
 
     instance = Hermite(convert_nbody)
     instance.initialize_code()
     instance.parameters.epsilon_squared = 0.0 | units.AU**2
     instance.parameters.stopping_conditions_number_of_steps = 10
     self.assertEquals(instance.parameters.stopping_conditions_number_of_steps,10)
 
     stars = self.new_system_of_sun_and_earth()
     earth = stars[1]
             
     instance.particles.add_particles(stars)
     instance.stopping_conditions.number_of_steps_detection.enable()
     instance.evolve_model(365.0 | units.day)
     self.assertTrue(instance.stopping_conditions.number_of_steps_detection.is_set())
     instance.particles.copy_values_of_all_attributes_to(stars)
     
     instance.cleanup_code()
     
     instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test22(self):
     hermite = Hermite()
     hermite.parameters.epsilon_squared = 0.0 | nbody_system.length**2
     
     particles = datamodel.Particles(2)
     particles.position = ([0,0,0], [1,0,0] )| nbody_system.length
     particles.velocity = ([-2,0,0], [2,0,0] )| nbody_system.speed
     particles.radius = 0| nbody_system.length
     particles.mass = 0.1| nbody_system.mass
             
     hermite.particles.add_particles(particles)
     hermite.stopping_conditions.out_of_box_detection.enable()
     hermite.parameters.stopping_conditions_out_of_box_size = 2 | nbody_system.length
     hermite.parameters.stopping_conditions_out_of_box_use_center_of_mass = False
     hermite.evolve_model(1 | nbody_system.time)
     print hermite.particles.x
     print hermite.particles.key, particles[1].key
     print hermite.stopping_conditions.out_of_box_detection.particles(0)
     self.assertTrue(hermite.stopping_conditions.out_of_box_detection.is_set())
     self.assertEquals(len(hermite.stopping_conditions.out_of_box_detection.particles(0)), 1)
     self.assertEquals(hermite.stopping_conditions.out_of_box_detection.particles(0)[0].key, particles[1].key)
     hermite.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
 def test11(self):
     particles = datamodel.Particles(2)
     particles.x = [0.0,10.0] | nbody_system.length
     particles.y = 0 | nbody_system.length
     particles.z = 0 | nbody_system.length
     particles.radius = 0.005 | nbody_system.length
     particles.vx =  0 | nbody_system.speed
     particles.vy =  0 | nbody_system.speed
     particles.vz =  0 | nbody_system.speed
     particles.mass = 1.0 | nbody_system.mass
    
     instance = Hermite()
     instance.initialize_code()
     instance.parameters.stopping_conditions_number_of_steps = 2
     self.assertEquals(instance.parameters.stopping_conditions_number_of_steps, 2)
     instance.particles.add_particles(particles) 
     instance.stopping_conditions.number_of_steps_detection.enable()
     instance.evolve_model(10 | nbody_system.time)
     self.assertTrue(instance.stopping_conditions.number_of_steps_detection.is_set())
     self.assertTrue(instance.model_time < 10 | nbody_system.time)
     
     instance.stop()

# 需要导入模块: from amuse.community.hermite0.interface import Hermite [as 别名]
# 或者: from amuse.community.hermite0.interface.Hermite import evolve_model [as 别名]
def simulate_small_cluster(
        number_of_stars=1000,
        end_time=40 | nbody_system.time,
        number_of_workers=1
        ):
    particles = new_plummer_model(number_of_stars)
    particles.scale_to_standard()

    gravity = Hermite(number_of_workers=number_of_workers)
    gravity.parameters.epsilon_squared = 0.15 | nbody_system.length ** 2

    gravity.particles.add_particles(particles)

    from_gravity_to_model = gravity.particles.new_channel_to(particles)

    time = 0.0 * end_time
    total_energy_at_t0 = gravity.kinetic_energy + gravity.potential_energy

    positions_at_different_times = []
    positions_at_different_times.append(particles.position)
    times = []
    times.append(time)

    print("evolving the model until t = " + str(end_time))
    while time < end_time:
        time += end_time / 3.0

        gravity.evolve_model(time)
        from_gravity_to_model.copy()

        positions_at_different_times.append(particles.position)
        times.append(time)
        print_log(time, gravity, particles, total_energy_at_t0)

    gravity.stop()

    return times, positions_at_different_times