def coreradius(mass,x,y,z):
hop=Hop()
ids,err=hop.new_particle(mass,x,y,z)
hop.set_density_method(2)
hop.set_nDens(7)
hop.calculate_densities()
dens,err=hop.get_density(ids)
tdens=numpy.sum(dens)
x_core=numpy.sum(dens*x)/tdens
y_core=numpy.sum(dens*y)/tdens
z_core=numpy.sum(dens*z)/tdens
rc=numpy.sqrt(
numpy.sum(dens**2*((x-x_core)**2+(y-y_core)**2+(z-z_core)**2))/numpy.sum(dens**2))
return x_core,y_core,z_core,rc
def coreradius(mass,x,y,z):
hop=Hop()
ids,err=hop.new_particle(mass,x,y,z)
hop.set_density_method(2)
hop.set_nDens(7)
hop.calculate_densities()
dens,err=hop.get_density(ids)
tdens=numpy.sum(dens)
x_core=numpy.sum(dens*x)/tdens
y_core=numpy.sum(dens*y)/tdens
z_core=numpy.sum(dens*z)/tdens
rc=numpy.sqrt(
numpy.sum(dens**2*((x-x_core)**2+(y-y_core)**2+(z-z_core)**2))/numpy.sum(dens**2))
return x_core,y_core,z_core,rc
def test3(self):
random.seed(1001)
print "Third test: densest neighbors and groups."
hop = HopInterface()
hop.initialize_code()
particles1 = new_plummer_model(10)
particles2 = new_plummer_model(10)
particles3 = new_plummer_model(10)
particles2.position += (10, 0, 0) | nbody_system.length
particles3.position += (0, 20, 0) | nbody_system.length
ids1, errors = hop.new_particle(
particles1.mass.value_in(nbody_system.mass),
particles1.x.value_in(nbody_system.length),
particles1.y.value_in(nbody_system.length),
particles1.z.value_in(nbody_system.length))
ids2, errors = hop.new_particle(
particles2.mass.value_in(nbody_system.mass),
particles2.x.value_in(nbody_system.length),
particles2.y.value_in(nbody_system.length),
particles2.z.value_in(nbody_system.length))
ids3, errors = hop.new_particle(
particles3.mass.value_in(nbody_system.mass),
particles3.x.value_in(nbody_system.length),
particles3.y.value_in(nbody_system.length),
particles3.z.value_in(nbody_system.length))
hop.set_nDens(5)
hop.calculate_densities()
hop.do_hop()
n, err = hop.get_group_id(ids1)
self.assertEquals(n, 2)
self.assertEquals(err, 0)
n, err = hop.get_group_id(ids2)
self.assertEquals(err, 0)
n, err = hop.get_group_id(ids3)
self.assertEquals(err, 0)
n, err = hop.get_densest_particle_in_group(2)
self.assertEquals(n, 7)
for i in range(3):
n, err = hop.get_number_of_particles_in_group(0)
self.assertEquals(err, 0)
self.assertEquals(n, 10)
n, err = hop.get_number_of_groups()
self.assertEquals(n, 3)
n, err = hop.get_densest_neighbor(ids1)
self.assertEquals(n, [7, 7, 12, 0, 7, 7, 7, 7, 12, 7])
hop.stop()
def test2(self):
random.seed(1001)
hop = HopInterface()
hop.initialize_code()
particles = new_plummer_model(1000)
ids, errors = hop.new_particle(
particles.mass.value_in(nbody_system.mass),
particles.x.value_in(nbody_system.length),
particles.y.value_in(nbody_system.length),
particles.z.value_in(nbody_system.length))
n, err = hop.get_number_of_particles()
self.assertEquals(n, 1000)
self.assertEquals(err, 0)
#distance_to_center = (particles.position - particles.center_of_mass()).lengths()
#print distance_to_center
ds = {0: 0.482308834791, 1: 0.4885137677192688, 2: 0.27442726492881775}
for method in [0, 1, 2]:
hop.set_nDens(7)
hop.set_density_method(method)
hop.calculate_densities()
d, err = hop.get_density(0)
self.assertAlmostRelativeEquals(d, ds[method], 5)
hop.stop()
def test4(self):
hop = HopInterface()
hop.initialize_code()
value, error = hop.get_nDens()
self.assertEquals(error, 0)
self.assertEquals(value, 64)
error = hop.set_nDens(7)
self.assertEquals(error, 0)
value, error = hop.get_nDens()
self.assertEquals(value, 7)
value, error = hop.get_nHop()
self.assertEquals(error, 0)
self.assertEquals(value, -1)
error = hop.set_nHop(7)
self.assertEquals(error, 0)
value, error = hop.get_nHop()
self.assertEquals(value, 7)
value, error = hop.get_nBucket()
self.assertEquals(error, 0)
self.assertEquals(value, 16)
error = hop.set_nHop(7)
self.assertEquals(error, 0)
value, error = hop.get_nHop()
self.assertEquals(value, 7)
hop.stop()
def test1(self):
print "First test: adding particles, setting and getting."
hop = HopInterface()
hop.initialize_code()
n, err = hop.get_number_of_particles()
self.assertEquals(n, 0)
self.assertEquals(err, 0)
for i in range(6):
id, err = hop.new_particle(0, i * i, 0, 0)
n, err = hop.get_number_of_particles()
self.assertEquals(n, i + 1)
self.assertEquals(err, 0)
for i in range(6):
x, y, z, err = hop.get_position(i)
self.assertEquals(x, i * i)
self.assertEquals(y, 0)
self.assertEquals(z, 0)
self.assertEquals(err, 0)
hop.set_position(i, x, i * i, 0)
for i in range(6):
x, y, z, err = hop.get_position(i)
self.assertEquals(x, y)
self.assertEquals(z, 0)
self.assertEquals(err, 0)
hop.stop()
def hopfromnb(nb,ids): m,r,x,y,z,vx,vy,vz,err=nb.get_state(ids) hop=Hop() ids2,err=hop.new_particle(x,y,z) return hop,ids2
def test3(self):
random.seed(1001)
print "Third test: densest neighbors and groups."
hop = HopInterface()
hop.initialize_code()
particles1 = new_plummer_model(10)
particles2 = new_plummer_model(10)
particles3 = new_plummer_model(10)
particles2.position += (10,0,0) | nbody_system.length
particles3.position += (0,20,0) | nbody_system.length
ids1, errors = hop.new_particle(
particles1.mass.value_in(nbody_system.mass),
particles1.x.value_in(nbody_system.length),
particles1.y.value_in(nbody_system.length),
particles1.z.value_in(nbody_system.length)
)
ids2, errors = hop.new_particle(
particles2.mass.value_in(nbody_system.mass),
particles2.x.value_in(nbody_system.length),
particles2.y.value_in(nbody_system.length),
particles2.z.value_in(nbody_system.length)
)
ids3, errors = hop.new_particle(
particles3.mass.value_in(nbody_system.mass),
particles3.x.value_in(nbody_system.length),
particles3.y.value_in(nbody_system.length),
particles3.z.value_in(nbody_system.length)
)
hop.set_nDens(5)
hop.calculate_densities()
hop.do_hop()
n, err = hop.get_group_id(ids1)
self.assertEquals(n, 2)
self.assertEquals(err, 0)
n, err = hop.get_group_id(ids2)
self.assertEquals(err, 0)
n, err = hop.get_group_id(ids3)
self.assertEquals(err, 0)
n, err = hop.get_densest_particle_in_group(2)
self.assertEquals(n, 7)
for i in range(3):
n, err = hop.get_number_of_particles_in_group(0)
self.assertEquals(err, 0)
self.assertEquals(n, 10)
n, err = hop.get_number_of_groups()
self.assertEquals(n, 3)
n, err = hop.get_densest_neighbor(ids1)
self.assertEquals(n, [7,7,12,0,7,7,7,7,12,7])
hop.stop()
def test2(self):
random.seed(1001)
hop = HopInterface()
hop.initialize_code()
particles = new_plummer_model(1000)
ids, errors = hop.new_particle(
particles.mass.value_in(nbody_system.mass),
particles.x.value_in(nbody_system.length),
particles.y.value_in(nbody_system.length),
particles.z.value_in(nbody_system.length)
)
n, err = hop.get_number_of_particles()
self.assertEquals(n, 1000)
self.assertEquals(err, 0)
#distance_to_center = (particles.position - particles.center_of_mass()).lengths()
#print distance_to_center
ds = {0: 0.482308834791, 1:0.4885137677192688, 2:0.27442726492881775}
for method in [0,1,2]:
hop.set_nDens(7)
hop.set_density_method(method)
hop.calculate_densities()
d, err = hop.get_density(0)
self.assertAlmostRelativeEquals(d,ds[method], 5)
hop.stop()
def test4(self):
hop = HopInterface()
hop.initialize_code()
value, error = hop.get_nDens()
self.assertEquals(error,0)
self.assertEquals(value,64)
error = hop.set_nDens(7)
self.assertEquals(error,0)
value, error = hop.get_nDens()
self.assertEquals(value,7)
value, error = hop.get_nHop()
self.assertEquals(error,0)
self.assertEquals(value, -1)
error = hop.set_nHop(7)
self.assertEquals(error,0)
value, error = hop.get_nHop()
self.assertEquals(value,7)
value, error = hop.get_nBucket()
self.assertEquals(error,0)
self.assertEquals(value, 16)
error = hop.set_nHop(7)
self.assertEquals(error,0)
value, error = hop.get_nHop()
self.assertEquals(value,7)
hop.stop()
def test1(self):
print "First test: adding particles, setting and getting."
hop = HopInterface()
hop.initialize_code()
n, err = hop.get_number_of_particles()
self.assertEquals(n, 0)
self.assertEquals(err, 0)
for i in range(6):
id, err = hop.new_particle(0, i*i, 0, 0)
n, err = hop.get_number_of_particles()
self.assertEquals(n, i+1)
self.assertEquals(err, 0)
for i in range(6):
x, y, z, err = hop.get_position(i)
self.assertEquals(x, i*i)
self.assertEquals(y, 0)
self.assertEquals(z, 0)
self.assertEquals(err, 0)
hop.set_position(i, x, i*i, 0)
for i in range(6):
x, y, z, err = hop.get_position(i)
self.assertEquals(x, y)
self.assertEquals(z, 0)
self.assertEquals(err, 0)
hop.stop()
def hopfromnb(nb,ids): m,r,x,y,z,vx,vy,vz,err=nb.get_state(ids) hop=Hop() ids2,err=hop.new_particle(x,y,z) return hop,ids2
