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from __future__ import division
import unittest
import meep as mp
def dummy_eps(vec):
return 1.0
class TestCylEllipsoid(unittest.TestCase):
ref_Ez = -8.29555720049629e-5
ref_Hz = -4.5623185899766e-5
def init(self):
c = mp.Cylinder(radius=3, material=mp.Medium(index=3.5))
e = mp.Ellipsoid(size=mp.Vector3(1, 2, mp.inf))
sources = mp.Source(src=mp.GaussianSource(1, fwidth=0.1),
component=self.src_cmpt,
center=mp.Vector3())
if self.src_cmpt == mp.Ez:
symmetries = [mp.Mirror(mp.X), mp.Mirror(mp.Y)]
if self.src_cmpt == mp.Hz:
symmetries = [mp.Mirror(mp.X, -1), mp.Mirror(mp.Y, -1)]
self.sim = mp.Simulation(cell_size=mp.Vector3(10, 10),
geometry=[c, e],
boundary_layers=[mp.PML(1.0)],
sources=[sources],
symmetries=symmetries,
resolution=100)
def print_stuff(sim_obj):
v = mp.Vector3(4.13, 3.75, 0)
p = self.sim.get_field_point(self.src_cmpt, v)
print("t, Ez: {} {}+{}i".format(self.sim.round_time(), p.real, p.imag))
self.print_stuff = print_stuff
def run_simulation(self):
self.sim.run(mp.at_beginning(mp.output_epsilon),
mp.at_every(0.25, self.print_stuff),
mp.at_end(self.print_stuff),
mp.at_end(mp.output_efield_z),
until=23)
ref_out_field = self.ref_Ez if self.src_cmpt == mp.Ez else self.ref_Hz
out_field = self.sim.fields.get_field(self.src_cmpt, mp.vec(4.13, 3.75)).real
diff = abs(out_field - ref_out_field)
self.assertTrue(abs(diff) <= 0.05 * abs(ref_out_field), "Field output differs")
def test_ez_field(self):
self.src_cmpt = mp.Ez
self.init()
self.run_simulation()
def test_hz_field(self):
self.src_cmpt = mp.Hz
self.init()
self.run_simulation()
if __name__ == '__main__':
unittest.main()
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