"""
class nbody_unit(core.base_unit):
def __init__(self, unit_in_si, system):
core.base_unit.__init__(self, unit_in_si.quantity, unit_in_si.name, unit_in_si.symbol, system)
self.unit_in_si = unit_in_si
def __str__(self):
return 'nbody '+self.unit_in_si.quantity
def is_generic(self):
return True
nbody_system = core.system('nbody')
length = generic_unit_system.length
time = generic_unit_system.time
mass = generic_unit_system.mass
acceleration = length / (time ** 2)
potential = (length ** 2) / (time ** 2)
energy = mass * potential
specific_energy = potential
speed = length / time
volume = (length ** 3)
density = mass / volume
pressure = mass / length / (time ** 2)
momentum_density = density * speed
energy_density = density * specific_energy
from amuse.units import core
system = core.system('S.I.')
m = core.base_unit('length', 'meter', 'm', system)
kg = core.base_unit('mass', 'kilogram', 'kg', system)
s = core.base_unit('time', 'second', 's', system)
A = core.base_unit('electric current', 'ampere', 'A', system)
K = core.base_unit('thermodynamic temperature', 'kelvin', 'K', system)
mol = core.base_unit('amount of substance', 'mole', 'mol', system)
cd = core.base_unit('luminous intensity', 'candela', 'cd', system)
no_system = core.no_system
none = core.none_unit('none','none')
no_unit = none
named = core.named_unit
# SI prefixes
def deca(unit):
return named('deca'+unit.name,'da'+unit.symbol,10.*unit)
def hecto(unit):
return named('hecto'+unit.name,'h'+unit.symbol,100.*unit)
def kilo(unit):
return named('kilo'+unit.name,'k'+unit.symbol,1000.*unit)
def mega(unit):
return named('mega'+unit.name,'M'+unit.symbol,1.e6*unit)
def giga(unit):
return named('giga'+unit.name,'G'+unit.symbol,1.e9*unit)
def tera(unit):
return named('tera'+unit.name,'T'+unit.symbol,1.e12*unit)
class nbody_unit(core.base_unit):
def __init__(self, unit_in_si, system):
core.base_unit.__init__(self, unit_in_si.quantity, unit_in_si.name,
unit_in_si.symbol, system)
self.unit_in_si = unit_in_si
def __str__(self):
return 'nbody ' + self.unit_in_si.quantity
def is_generic(self):
return True
nbody_system = core.system('nbody')
length = generic_unit_system.length
time = generic_unit_system.time
mass = generic_unit_system.mass
acceleration = length / (time**2)
potential = (length**2) / (time**2)
energy = mass * potential
specific_energy = potential
speed = length / time
volume = (length**3)
density = mass / volume
pressure = mass / length / (time**2)
momentum_density = density * speed
energy_density = density * specific_energy
from amuse.units import core
class generic_unit(core.base_unit):
def __init__(self, unit_in_si, system):
core.base_unit.__init__(self, unit_in_si.quantity, unit_in_si.name, unit_in_si.symbol, system)
self.unit_in_si = unit_in_si
def __str__(self):
return self.unit_in_si.quantity
def is_generic(self):
return True
generic_system = core.system("generic")
length = generic_unit(units.m, generic_system)
time = generic_unit(units.s, generic_system)
mass = generic_unit(units.kg, generic_system)
current = generic_unit(units.A, generic_system)
temperature = generic_unit(units.K, generic_system)
luminous_intensity = generic_unit(units.cd, generic_system)
acceleration = length / (time ** 2)
force = mass * acceleration
potential = (length ** 2) / (time ** 2)
energy = mass * potential
specific_energy = potential
speed = length / time
volume = length ** 3
class generic_unit(core.base_unit):
def __init__(self, unit_in_si, system):
core.base_unit.__init__(self, unit_in_si.quantity, unit_in_si.name,
unit_in_si.symbol, system)
self.unit_in_si = unit_in_si
def __str__(self):
return self.unit_in_si.quantity
def is_generic(self):
return True
generic_system = core.system('generic')
length = generic_unit(units.m, generic_system)
time = generic_unit(units.s, generic_system)
mass = generic_unit(units.kg, generic_system)
current = generic_unit(units.A, generic_system)
temperature = generic_unit(units.K, generic_system)
luminous_intensity = generic_unit(units.cd, generic_system)
acceleration = length / (time**2)
force = mass * acceleration
potential = (length**2) / (time**2)
energy = mass * potential
specific_energy = potential
speed = length / time
volume = (length**3)
"""
class nbody_unit(core.base_unit):
def __init__(self, unit_in_si, system):
core.base_unit.__init__(self, unit_in_si.quantity, unit_in_si.name, unit_in_si.symbol, system)
self.unit_in_si = unit_in_si
def __str__(self):
return "nbody " + self.unit_in_si.quantity
def is_generic(self):
return True
nbody_system = core.system("nbody")
length = generic_unit_system.length
time = generic_unit_system.time
mass = generic_unit_system.mass
acceleration = length / (time ** 2)
potential = (length ** 2) / (time ** 2)
energy = mass * potential
specific_energy = potential
speed = length / time
volume = length ** 3
density = mass / volume
pressure = mass / length / (time ** 2)
momentum_density = density * speed
energy_density = density * specific_energy