def pot_to_requiv_contact(pot, q, sma, compno=1):
"""
"""
logger.debug(
"pot_to_requiv_contact(pot={}, q={}, sma={}, compno={})".format(
pot, q, sma, compno))
d = 1.
F = 1.
crit_pots = libphoebe.roche_critical_potential(q, d, F)
crit_pot_L1 = crit_pots['L1']
crit_pot_L23 = max(crit_pots['L2'], crit_pots['L3'])
if pot > crit_pot_L1:
raise ValueError("potential > L1 critical value")
if pot < crit_pot_L23:
raise ValueError("potential < L2/L3 critical value")
try:
logger.debug(
"libphoebe.roche_contact_neck_min(pi/2, q={}, d={}, pot={})".
format(q, d, pot))
nekmin = libphoebe.roche_contact_neck_min(np.pi / 2., q, d,
pot)['xmin']
logger.debug(
"libphoebe.roche_contact_partial_area_volume(nekmin={}, q={}, d={}, pot={}, compno={})"
.format(nekmin, q, d, pot, compno - 1))
volume_equiv = libphoebe.roche_contact_partial_area_volume(
nekmin, q, d, pot, compno - 1)['lvolume']
# returns normalized vequiv, should multiply by sma back for requiv in SI
return sma * (3. / 4 * 1. / np.pi * volume_equiv)**(1. / 3)
except:
# replace this with actual check in the beginning or before function call
raise ValueError(
'potential probably out of bounds for contact envelope')
def test_roche_semidetached(plot=False):
#print "roche semi-detached"
q = 1
F = 1
d = 1
r_crit = libphoebe.roche_critical_potential(q, F, d, L1 = True, L2 = False, L3 = False)
Omega0 = r_crit["L1"]
choice = 0
# determine area and volume
r_av = libphoebe.roche_area_volume(q, F, d, Omega0, choice, larea=True, lvolume=True)
#print r_av
# calculate delta
ntriangles=1000
delta = np.sqrt(r_av["larea"]/(np.sqrt(3)*ntriangles/4))
max_triangles = int(1.5*ntriangles)
# generate mesh
r_mesh = libphoebe.roche_marching_mesh(q, F, d, Omega0, delta, choice, max_triangles,
vertices=True, vnormals=True, triangles=True,
tnormals=True, areas=True, area=True, volume=True, full=True)
# check the number of triagles of the mesh
#print len(r_mesh["triangles"])
assert(0.75*ntriangles < len(r_mesh["triangles"]) < 1.35*ntriangles)
# check is the vertices are really on isosurface
#print np.max(np.abs([potential_roche(r, q, F, d) - Omega0 for r in r_mesh["vertices"]]))
assert(np.max(np.abs([potential_roche(r, q, F, d) - Omega0 for r in r_mesh["vertices"]])) < 1e-12)
# check the area -0.00524575234831
#print (r_mesh["area"]-r_av["larea"])/r_av["larea"]
assert (np.abs(r_mesh["area"]-r_av["larea"])/r_av["larea"] < 1e-2)
# check the volume -0.00985875277254
#print (r_mesh["volume"]- r_av["lvolume"])/r_av["lvolume"]
assert (np.abs(r_mesh["volume"]- r_av["lvolume"])/r_av["lvolume"] < 2e-2)
def potential_contact_L23(q, **kwargs):
"""
"""
crit_pots = libphoebe.roche_critical_potential(q, 1., 1.)
return max(crit_pots['L2'], crit_pots['L3'])
def potential_contact_L1(q, **kwargs):
"""
"""
crit_pots = libphoebe.roche_critical_potential(q, 1., 1.)
return crit_pots['L1']