def test_ne():
objs = [
batoid.Plane(),
batoid.Plane(allowReverse=True),
batoid.Paraboloid(2.0),
]
all_obj_diff(objs)
def test_ne():
objs = [
batoid.Sphere(1.0),
batoid.Sphere(2.0),
batoid.Plane()
]
all_obj_diff(objs)
def test_ne():
objs = [
batoid.Paraboloid(1.0),
batoid.Paraboloid(2.0),
batoid.Plane()
]
all_obj_diff(objs)
def test_add_plane():
np.random.seed(577)
for _ in range(100):
# Adding a plane should have zero effect on sag or normal vector
s1 = batoid.Sphere(np.random.uniform(1, 3))
s2 = batoid.Plane()
sum = batoid.Sum([s1, s2])
x = np.random.normal(size=5000)
y = np.random.normal(size=5000)
np.testing.assert_allclose(
sum.sag(x, y),
s1.sag(x, y),
rtol=1e-12,
atol=1e-12
)
for _x, _y in zip(x[:100], y[:100]):
np.testing.assert_allclose(
sum.normal(_x, _y),
s1.normal(_x, _y),
rtol=1e-12,
atol=1e-12
)
def test_intersect():
rng = np.random.default_rng(577)
size = 10_000
planeCoordSys = batoid.CoordSys(origin=[0, 0, -1])
plane = batoid.Plane()
x = rng.normal(0.0, 1.0, size=size)
y = rng.normal(0.0, 1.0, size=size)
z = np.full_like(x, -100.0)
# If we shoot rays straight up, then it's easy to predict the intersection
vx = np.zeros_like(x)
vy = np.zeros_like(x)
vz = np.ones_like(x)
rv = batoid.RayVector(x, y, z, vx, vy, vz)
np.testing.assert_allclose(rv.z, -100.0)
rv2 = batoid.intersect(plane, rv.copy(), planeCoordSys)
assert rv2.coordSys == planeCoordSys
rv2 = rv2.toCoordSys(batoid.CoordSys())
np.testing.assert_allclose(rv2.x, x)
np.testing.assert_allclose(rv2.y, y)
np.testing.assert_allclose(rv2.z, -1, rtol=0, atol=1e-12)
# Check default intersect coordTransform
rv2 = rv.copy().toCoordSys(planeCoordSys)
batoid.intersect(plane, rv2)
assert rv2.coordSys == planeCoordSys
rv2 = rv2.toCoordSys(batoid.CoordSys())
np.testing.assert_allclose(rv2.x, x)
np.testing.assert_allclose(rv2.y, y)
np.testing.assert_allclose(rv2.z, -1, rtol=0, atol=1e-12)
def test_plane_reflection_reversal():
import random
random.seed(57)
plane = batoid.Plane()
for i in range(1000):
x = random.gauss(0, 1)
y = random.gauss(0, 1)
vx = random.gauss(0, 1e-1)
vy = random.gauss(0, 1e-1)
v = np.array([vx, vy, 1])
v / np.linalg.norm(v)
ray = batoid.Ray([x, y, -10], v, 0)
rray = plane.reflect(ray.copy())
# Invert the reflected ray, and see that it ends back at the starting
# point
# Keep going a bit before turning around though
turn_around = rray.positionAtTime(rray.t+0.1)
return_ray = batoid.Ray(turn_around, -rray.v, -(rray.t+0.1))
riray = plane.intersect(return_ray.copy())
np.testing.assert_allclose(rray.r[0], riray.r[0], rtol=0, atol=1e-10)
np.testing.assert_allclose(rray.r[1], riray.r[1], rtol=0, atol=1e-10)
np.testing.assert_allclose(rray.r[2], riray.r[2], rtol=0, atol=1e-10)
# Reflect and propagate back to t=0.
cray = plane.reflect(return_ray.copy())
cray = cray.positionAtTime(0)
np.testing.assert_allclose(cray[0], x, rtol=0, atol=1e-10)
np.testing.assert_allclose(cray[1], y, rtol=0, atol=1e-10)
np.testing.assert_allclose(cray[2], -10, rtol=0, atol=1e-10)
def test_plane_refraction_reversal():
import random
random.seed(57)
wavelength = 500e-9 # arbitrary
plane = batoid.Plane()
m1 = batoid.ConstMedium(1.5)
m2 = batoid.ConstMedium(1.2)
for i in range(1000):
x = random.gauss(0, 1)
y = random.gauss(0, 1)
vx = random.gauss(0, 1e-1)
vy = random.gauss(0, 1e-1)
ray = batoid.Ray([x, y, -10],
normalized(np.array([vx, vy, 1]))/m1.getN(wavelength),
0)
rray = plane.refract(ray.copy(), m1, m2)
np.testing.assert_allclose(np.linalg.norm(rray.v), 1./m2.getN(wavelength), rtol=1e-14)
# Invert the refracted ray, and see that it ends back at the starting
# point
# Keep going a bit before turning around though
turn_around = rray.positionAtTime(rray.t+0.1)
return_ray = batoid.Ray(turn_around, -rray.v, -(rray.t+0.1))
riray = plane.intersect(return_ray.copy())
np.testing.assert_allclose(rray.r[0], riray.r[0], rtol=0, atol=1e-10)
np.testing.assert_allclose(rray.r[1], riray.r[1], rtol=0, atol=1e-10)
np.testing.assert_allclose(rray.r[2], riray.r[2], rtol=0, atol=1e-10)
# Refract and propagate back to t=0.
cray = plane.refract(return_ray.copy(), m2, m1)
np.testing.assert_allclose(np.linalg.norm(cray.v), 1./m1.getN(wavelength), rtol=1e-14)
cpoint = cray.positionAtTime(0)
np.testing.assert_allclose(cpoint[0], x, rtol=0, atol=1e-10)
np.testing.assert_allclose(cpoint[1], y, rtol=0, atol=1e-10)
np.testing.assert_allclose(cpoint[2], -10, rtol=0, atol=1e-10)
def test_plane_refraction_plane():
import random
random.seed(5)
wavelength = 500e-9 # arbitrary
plane = batoid.Plane()
m1 = batoid.ConstMedium(1.1)
m2 = batoid.ConstMedium(1.3)
for i in range(1000):
x = random.gauss(0, 1)
y = random.gauss(0, 1)
vx = random.gauss(0, 1e-1)
vy = random.gauss(0, 1e-1)
v = np.array([vx, vy, 1])
v /= np.linalg.norm(v)
ray = batoid.Ray([x, y, -10], v/m1.getN(wavelength), 0)
rray = plane.refract(ray.copy(), m1, m2)
np.testing.assert_allclose(np.linalg.norm(rray.v), 1./m2.getN(wavelength), rtol=1e-14)
# ray.v, surfaceNormal, and rray.v should all be in the same plane, and
# hence (ray.v x surfaceNormal) . rray.v should have zero magnitude.
normal = plane.normal(rray.r[0], rray.r[1])
np.testing.assert_allclose(
np.dot(np.cross(ray.v, normal), rray.v),
0.0, rtol=0, atol=1e-15)
# Test Snell's law
np.testing.assert_allclose(
m1.getN(wavelength)*np.linalg.norm(np.cross(normalized(ray.v), normal)),
m2.getN(wavelength)*np.linalg.norm(np.cross(normalized(rray.v), normal)),
rtol=0, atol=1e-15)
def test_reflect():
rng = np.random.default_rng(5772)
size = 10_000
plane = batoid.Plane()
x = rng.normal(0.0, 1.0, size=size)
y = rng.normal(0.0, 1.0, size=size)
z = np.full_like(x, -100.0)
vx = rng.uniform(-1e-5, 1e-5, size=size)
vy = rng.uniform(-1e-5, 1e-5, size=size)
vz = np.ones_like(x)
rv = batoid.RayVector(x, y, z, vx, vy, vz)
rvr = batoid.reflect(plane, rv.copy())
rvr2 = plane.reflect(rv.copy())
rays_allclose(rvr, rvr2)
# print(f"{np.sum(rvr.failed)/len(rvr)*100:.2f}% failed")
normal = plane.normal(rvr.x, rvr.y)
# Test law of reflection
a0 = np.einsum("ad,ad->a", normal, rv.v)[~rvr.failed]
a1 = np.einsum("ad,ad->a", normal, -rvr.v)[~rvr.failed]
np.testing.assert_allclose(a0, a1, rtol=0, atol=1e-12)
# Test that rv.v, rvr.v and normal are all in the same plane
np.testing.assert_allclose(np.einsum("ad,ad->a", np.cross(normal, rv.v),
rv.v)[~rvr.failed],
0.0,
rtol=0,
atol=1e-12)
def test_ne():
objs = [
batoid.Plane(),
batoid.Tilted(0.0, 0.1),
batoid.Tilted(0.1, 0.1),
]
all_obj_diff(objs)
def test_plane_reflection_plane():
import random
random.seed(5)
plane = batoid.Plane()
for i in range(1000):
x = random.gauss(0, 1)
y = random.gauss(0, 1)
vx = random.gauss(0, 1e-1)
vy = random.gauss(0, 1e-1)
v = np.array([vx, vy, 1])
v / np.linalg.norm(v)
ray = batoid.Ray([x, y, -10], v, 0)
rray = plane.reflect(ray.copy())
# ray.v, surfaceNormal, and rray.v should all be in the same plane, and
# hence (ray.v x surfaceNormal) . rray.v should have zero magnitude.
# magnitude zero.
np.testing.assert_allclose(
np.dot(np.cross(ray.v, plane.normal(rray.r[0], rray.r[1])), rray.v),
0.0, rtol=0, atol=1e-15)
# Actually, reflection off a plane is pretty straigtforward to test
# directly.
np.testing.assert_allclose(ray.v[0], rray.v[0])
np.testing.assert_allclose(ray.v[1], rray.v[1])
np.testing.assert_allclose(ray.v[2], -rray.v[2])
def test_refract():
rng = np.random.default_rng(57721)
size = 10_000
plane = batoid.Plane()
m0 = batoid.ConstMedium(rng.normal(1.2, 0.01))
m1 = batoid.ConstMedium(rng.normal(1.3, 0.01))
x = rng.normal(0.0, 1.0, size=size)
y = rng.normal(0.0, 1.0, size=size)
z = np.full_like(x, -100.0)
vx = rng.uniform(-1e-5, 1e-5, size=size)
vy = rng.uniform(-1e-5, 1e-5, size=size)
vz = np.sqrt(1 - vx * vx - vy * vy) / m0.n
rv = batoid.RayVector(x, y, z, vx, vy, vz)
rvr = batoid.refract(plane, rv.copy(), m0, m1)
rvr2 = plane.refract(rv.copy(), m0, m1)
rays_allclose(rvr, rvr2)
# print(f"{np.sum(rvr.failed)/len(rvr)*100:.2f}% failed")
normal = plane.normal(rvr.x, rvr.y)
# Test Snell's law
s0 = np.sum(np.cross(normal, rv.v * m0.n)[~rvr.failed], axis=-1)
s1 = np.sum(np.cross(normal, rvr.v * m1.n)[~rvr.failed], axis=-1)
np.testing.assert_allclose(m0.n * s0, m1.n * s1, rtol=0, atol=1e-9)
# Test that rv.v, rvr.v and normal are all in the same plane
np.testing.assert_allclose(np.einsum("ad,ad->a", np.cross(normal, rv.v),
rv.v)[~rvr.failed],
0.0,
rtol=0,
atol=1e-12)
def test_prescreen():
"""Add an OPDScreen in front of LSST entrance pupil. The OPD that comes out
should be _negative_ the added phase delay by convention.
"""
lsst = batoid.Optic.fromYaml("LSST_r.yaml")
wavelength = 620e-9
z_ref = batoid.zernikeGQ(
lsst, 0, 0, wavelength, rings=10, reference='chief', jmax=37, eps=0.61
)
rng = np.random.default_rng(577)
for i in range(4, 38):
amplitude = rng.uniform(0.1, 0.2)
zern = batoid.Zernike(
np.array([0]*i+[amplitude])*wavelength,
R_outer=4.18, R_inner=0.61*4.18
)
tel = batoid.CompoundOptic(
(
batoid.optic.OPDScreen(
batoid.Plane(),
zern,
name='PS',
obscuration=batoid.ObscNegation(batoid.ObscCircle(5.0)),
coordSys=lsst.stopSurface.coordSys
),
*lsst.items
),
name='PS0',
backDist=lsst.backDist,
pupilSize=lsst.pupilSize,
inMedium=lsst.inMedium,
stopSurface=lsst.stopSurface,
sphereRadius=lsst.sphereRadius,
pupilObscuration=lsst.pupilObscuration
)
do_pickle(tel)
zGQ = batoid.zernikeGQ(
tel, 0, 0, wavelength, rings=10, reference='chief', jmax=37, eps=0.61
)
zTA = batoid.zernikeTA(
tel, 0, 0, wavelength, nrad=10, naz=60, reference='chief', jmax=37, eps=0.61
)
z_expect = np.zeros_like(zGQ)
z_expect[i] = -amplitude # Longer OPL => negative OPD
np.testing.assert_allclose(
(zGQ-z_ref)[4:], z_expect[4:],
rtol=0, atol=5e-4
)
# Distortion makes this comparison less precise
np.testing.assert_allclose(
zGQ[4:], zTA[4:],
rtol=0, atol=5e-3
)
def test_fail():
sum = batoid.Sum([batoid.Plane(), batoid.Sphere(1.0)])
ray = batoid.Ray([0,0,sum.sag(0,0)-1], [0,0,-1])
ray = sum.intersect(ray)
assert ray.failed
ray = batoid.Ray([0,0,sum.sag(0,0)-1], [0,0,-1])
sum.intersectInPlace(ray)
assert ray.failed
def test_fail():
plane = batoid.Plane()
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
ray = plane.intersect(ray)
assert ray.failed
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
plane.intersectInPlace(ray)
assert ray.failed
def test_fail():
sum = batoid.Sum([batoid.Plane(), batoid.Sphere(1.0)])
rv = batoid.RayVector(0, 10, 0, 0, 0, -1) # Too far to side
rv2 = batoid.intersect(sum, rv.copy())
np.testing.assert_equal(rv2.failed, np.array([True]))
# This one passes
rv = batoid.RayVector(0, 0, -1, 0, 0, +1)
rv2 = batoid.intersect(sum, rv.copy())
np.testing.assert_equal(rv2.failed, np.array([False]))
def test_refraction_chromatic():
import random
random.seed(577215664)
wavelength1 = 500e-9
wavelength2 = 600e-9
flux = 1.0
plane = batoid.Plane()
filename = os.path.join(batoid.datadir, "media", "silica_dispersion.txt")
wave, n = np.genfromtxt(filename).T
wave *= 1e-6 # micron -> meters
table = batoid.Table(wave, n, batoid.Table.Interpolant.linear)
silica = batoid.TableMedium(table)
air = batoid.Air()
thx, thy = 0.001, 0.0001
dirCos = batoid.utils.gnomonicToDirCos(thx, thy)
rv1 = batoid.rayGrid(10.0, 1., dirCos[0], dirCos[1], -dirCos[2], 2,
wavelength1, flux, silica)
rv2 = batoid.rayGrid(10.0, 1., dirCos[0], dirCos[1], -dirCos[2], 2,
wavelength2, flux, silica)
rays = []
for ray in rv1:
rays.append(ray)
for ray in rv2:
rays.append(ray)
rvCombined = batoid.RayVector(rays)
rv1r = plane.refract(rv1, silica, air)
rv2r = plane.refract(rv2, silica, air)
assert rv1r != rv2r
rays = []
for ray in rv1r:
rays.append(ray)
for ray in rv2r:
rays.append(ray)
rvrCombined1 = batoid.RayVector(rays)
rvrCombined2 = plane.refract(rvCombined, silica, air)
assert rvrCombined1 == rvrCombined2
# Check in-place
plane.refractInPlace(rv1, silica, air)
plane.refractInPlace(rv2, silica, air)
assert rv1 != rv2
plane.refractInPlace(rvCombined, silica, air)
rays = []
for ray in rv1:
rays.append(ray)
for ray in rv2:
rays.append(ray)
rvCombined2 = batoid.RayVector(rays)
assert rvCombined == rvCombined2
def test_fail():
plane = batoid.Plane()
# Only fail if vz == 0
rv = batoid.RayVector(0, 0, 0, 0, 1, 0)
rv2 = batoid.intersect(plane, rv.copy())
np.testing.assert_equal(rv2.failed, np.array([True]))
# Otherwise, succeeds
rv = batoid.RayVector(0, 0, 0, 0, 0, -1)
rv2 = batoid.intersect(plane, rv.copy())
np.testing.assert_equal(rv2.failed, np.array([False]))
def test_fail():
plane = batoid.Plane()
assert plane.allowReverse == False
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
ray = plane.intersect(ray)
assert ray.failed
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
plane.intersectInPlace(ray)
assert ray.failed
# These should succeed though if allowReverse is True
plane = batoid.Plane(allowReverse=True)
assert plane.allowReverse == True
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
ray = plane.intersect(ray)
assert not ray.failed
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
plane.intersectInPlace(ray)
assert not ray.failed
def test_asPolar():
rng = np.random.default_rng(5772156)
for _ in range(10):
backDist = rng.uniform(9.0, 11.0)
wavelength = rng.uniform(300e-9, 1100e-9)
inner = rng.uniform(1.0, 3.0)
outer = inner + rng.uniform(1.0, 3.0)
nrad = rng.integers(1, 11)
naz = rng.integers(10, 21)
dirCos = np.array([
rng.uniform(-0.1, 0.1),
rng.uniform(-0.1, 0.1),
rng.uniform(-1.2, -0.8),
])
dirCos /= np.sqrt(np.dot(dirCos, dirCos))
rays = batoid.RayVector.asPolar(backDist=backDist,
wavelength=wavelength,
outer=outer,
inner=inner,
nrad=nrad,
naz=naz,
dirCos=dirCos)
np.testing.assert_allclose(rays.t, 0)
np.testing.assert_allclose(rays.wavelength, wavelength)
np.testing.assert_allclose(rays.vignetted, False)
np.testing.assert_allclose(rays.failed, False)
np.testing.assert_allclose(rays.vx, dirCos[0])
np.testing.assert_allclose(rays.vy, dirCos[1])
np.testing.assert_allclose(rays.vz, dirCos[2])
assert len(rays) % 6 == 0
# If we set inner=0, then last ray should
# intersect the center of the pupil
inner = 0.0
rays = batoid.RayVector.asPolar(backDist=backDist,
wavelength=wavelength,
outer=outer,
inner=inner,
nrad=nrad,
naz=naz,
dirCos=dirCos)
assert len(rays) % 6 == 1
pupil = batoid.Plane()
pupil.intersect(rays)
np.testing.assert_allclose(rays.x[-1], 0, atol=1e-14)
np.testing.assert_allclose(rays.y[-1], 0, atol=1e-14)
np.testing.assert_allclose(rays.z[-1], 0, atol=1e-14)
def test_RVasPolar():
for _ in range(10):
backDist = np.random.uniform(9.0, 11.0)
wavelength = np.random.uniform(300e-9, 1100e-9)
inner = np.random.uniform(1.0, 3.0)
outer = inner + np.random.uniform(1.0, 3.0)
nrad = np.random.randint(1, 10)
naz = np.random.randint(10, 20)
dirCos = np.array([
np.random.uniform(-0.1, 0.1),
np.random.uniform(-0.1, 0.1),
np.random.uniform(-1.2, -0.8),
])
dirCos /= np.sqrt(np.dot(dirCos, dirCos))
rays = batoid.RayVector.asPolar(backDist=backDist,
wavelength=wavelength,
outer=outer,
inner=inner,
nrad=nrad,
naz=naz,
dirCos=dirCos)
np.testing.assert_allclose(rays.t, 0)
np.testing.assert_allclose(rays.wavelength, wavelength)
np.testing.assert_allclose(rays.vignetted, False)
np.testing.assert_allclose(rays.failed, False)
np.testing.assert_allclose(rays.vx, dirCos[0])
np.testing.assert_allclose(rays.vy, dirCos[1])
np.testing.assert_allclose(rays.vz, dirCos[2])
assert len(rays) % 6 == 0
# If we set inner=0, then last ray should
# intersect the center of the pupil
inner = 0.0
rays = batoid.RayVector.asPolar(backDist=backDist,
wavelength=wavelength,
outer=outer,
inner=inner,
nrad=nrad,
naz=naz,
dirCos=dirCos)
assert len(rays) % 6 == 1
# Check distribution of points propagated to entrance pupil
pupil = batoid.Plane()
pupil.intersect(rays)
np.testing.assert_allclose(rays[len(rays) - 1].x, 0, atol=1e-14)
np.testing.assert_allclose(rays[len(rays) - 1].y, 0, atol=1e-14)
np.testing.assert_allclose(rays[len(rays) - 1].z, 0, atol=1e-14)
def test_sag():
rng = np.random.default_rng(5)
for i in range(100):
plane = batoid.Plane()
for j in range(10):
x = rng.normal()
y = rng.normal()
result = plane.sag(x, y)
np.testing.assert_equal(result, 0.0)
# Check that it returned a scalar float and not an array
assert isinstance(result, float)
# Check vectorization
x = rng.normal(size=(10, 10))
y = rng.normal(size=(10, 10))
np.testing.assert_allclose(plane.sag(x, y), 0.0)
# Make sure non-unit stride arrays also work
np.testing.assert_allclose(plane.sag(x[::5, ::2], y[::5, ::2]), 0.0)
do_pickle(plane)
def test_withSurface():
telescope = batoid.Optic.fromYaml("HSC.yaml")
rays = batoid.RayVector.asPolar(telescope,
wavelength=620e-9,
theta_x=np.deg2rad(0.1),
theta_y=0.0,
nrad=10,
naz=60)
trays = telescope.trace(rays.copy())
for key, item in telescope.itemDict.items():
if not isinstance(item, batoid.Interface):
continue
# Do a trivial surface replacement
surf2 = batoid.Sum([batoid.Plane(), item.surface])
telescope2 = telescope.withSurface(key, surf2)
assert telescope != telescope2
trays2 = telescope.trace(rays.copy())
rays_allclose(trays, trays2)
def test_normal():
rng = np.random.default_rng(57)
for i in range(100):
plane = batoid.Plane()
for j in range(10):
x = rng.normal()
y = rng.normal()
result = plane.normal(x, y)
np.testing.assert_equal(result, np.array([0., 0., 1.]))
# Check vectorization
x = rng.normal(size=(10, 10))
y = rng.normal(size=(10, 10))
np.testing.assert_allclose(
plane.normal(x, y),
np.broadcast_to(np.array([0., 0., 1.]), (10, 10, 3)))
# Make sure non-unit stride arrays also work
np.testing.assert_allclose(
plane.normal(x[::5, ::2], y[::5, ::2]),
np.broadcast_to(np.array([0., 0., 1.]), (2, 5, 3)))
def test_intersect():
import random
random.seed(577)
for i in range(100):
plane = batoid.Plane()
for j in range(10):
x = random.gauss(0.0, 1.0)
y = random.gauss(0.0, 1.0)
# If we shoot rays straight up, then it's easy to predict the
# intersection points.
r0 = batoid.Ray((x, y, -1000), (0, 0, 1), 0)
r = plane.intersect(r0)
np.testing.assert_allclose(r.r[0], x)
np.testing.assert_allclose(r.r[1], y)
np.testing.assert_allclose(r.r[2],
plane.sag(x, y),
rtol=0,
atol=1e-9)
def test_sag():
import random
random.seed(57)
for i in range(100):
plane = batoid.Plane()
for j in range(10):
x = random.gauss(0.0, 1.0)
y = random.gauss(0.0, 1.0)
result = plane.sag(x, y)
np.testing.assert_allclose(result, 0.0)
# Check that it returned a scalar float and not an array
assert isinstance(result, float)
# Check vectorization
x = np.random.normal(0.0, 1.0, size=(10, 10))
y = np.random.normal(0.0, 1.0, size=(10, 10))
np.testing.assert_allclose(plane.sag(x, y), 0.0)
# Make sure non-unit stride arrays also work
np.testing.assert_allclose(plane.sag(x[::5, ::2], y[::5, ::2]), 0.0)
do_pickle(plane)
def test_intersect_vectorized():
import random
random.seed(5772)
r0s = [
batoid.Ray([
random.gauss(0.0, 0.1),
random.gauss(0.0, 0.1),
random.gauss(10.0, 0.1)
], [
random.gauss(0.0, 0.1),
random.gauss(0.0, 0.1),
random.gauss(-1.0, 0.1)
], random.gauss(0.0, 0.1)) for i in range(1000)
]
r0s = batoid.RayVector(r0s)
for i in range(100):
plane = batoid.Plane()
r1s = plane.intersect(r0s)
r2s = batoid.RayVector([plane.intersect(r0) for r0 in r0s])
assert r1s == r2s
def test_add_plane():
rng = np.random.default_rng(5772156)
for _ in range(100):
# Adding a plane should have zero effect on sag or normal vector
s1 = batoid.Sphere(rng.uniform(1, 3))
s2 = batoid.Plane()
sum = batoid.Sum([s1, s2])
x = rng.normal(size=5000)
y = rng.normal(size=5000)
np.testing.assert_allclose(sum.sag(x, y),
s1.sag(x, y),
rtol=0,
atol=1e-12)
np.testing.assert_allclose(
sum.normal(x, y),
s1.normal(x, y),
rtol=0,
atol=1e-12,
)
def test_ne():
objs = [
batoid.Mirror(batoid.Plane()),
batoid.Detector(batoid.Plane()),
batoid.Baffle(batoid.Plane()),
batoid.RefractiveInterface(batoid.Plane()),
batoid.Mirror(batoid.Paraboloid(0.1)),
batoid.Detector(batoid.Paraboloid(0.1)),
batoid.Baffle(batoid.Paraboloid(0.1)),
batoid.RefractiveInterface(batoid.Paraboloid(0.1)),
batoid.Mirror(batoid.Plane(), obscuration=batoid.ObscCircle(0.1)),
batoid.Mirror(batoid.Plane(), inMedium=batoid.ConstMedium(1.1)),
batoid.Mirror(batoid.Plane(), outMedium=batoid.ConstMedium(1.1)),
batoid.Mirror(batoid.Plane(), coordSys=batoid.CoordSys([0, 0, 1])),
batoid.CompoundOptic(
[batoid.Mirror(batoid.Plane()),
batoid.Mirror(batoid.Plane())]),
batoid.CompoundOptic(
[batoid.Mirror(batoid.Plane()),
batoid.Baffle(batoid.Plane())]),
batoid.CompoundOptic([
batoid.RefractiveInterface(batoid.Plane()),
batoid.RefractiveInterface(batoid.Plane())
]),
batoid.Lens([
batoid.RefractiveInterface(batoid.Plane()),
batoid.RefractiveInterface(batoid.Plane())
]),
]
all_obj_diff(objs)
def test_huygens_paraboloid(plot=False):
if __name__ == '__main__':
obscurations = [0.0, 0.25, 0.5, 0.75]
else:
obscurations = [0.25]
print("Testing HuygensPSF")
# Just do a single parabolic mirror test
focalLength = 1.5
diam = 0.3
R = 2*focalLength
for obscuration in obscurations:
telescope = batoid.CompoundOptic(
items = [
batoid.Mirror(
batoid.Paraboloid(R),
name="Mirror",
obscuration=batoid.ObscNegation(
batoid.ObscAnnulus(0.5*obscuration*diam, 0.5*diam)
)
),
batoid.Detector(
batoid.Plane(),
name="detector",
coordSys=batoid.CoordSys(origin=[0, 0, focalLength])
)
],
pupilSize=diam,
backDist=10.0,
inMedium=batoid.ConstMedium(1.0)
)
airy_size = 1.22*500e-9/diam * 206265
print()
print("Airy radius: {:4.2f} arcsec".format(airy_size))
# Start with the HuygensPSF
npix = 96
size = 3.0 # arcsec
dsize = size/npix
dsize_X = dsize*focalLength/206265 # meters
psf = batoid.huygensPSF(
telescope, 0.0, 0.0, 500e-9,
nx=npix, dx=dsize_X, dy=dsize_X
)
psf.array /= np.max(psf.array)
scale = np.sqrt(np.abs(np.linalg.det(psf.primitiveVectors))) # meters
scale *= 206265/focalLength # arcsec
obj = galsim.Airy(lam=500, diam=diam, obscuration=obscuration)
# Need to shift by half a pixel.
obj = obj.shift(scale/2, scale/2)
im = obj.drawImage(nx=npix, ny=npix, scale=scale, method='no_pixel')
arr = im.array/np.max(im.array)
gs_mom = galsim.hsm.FindAdaptiveMom(im)
psfim = galsim.Image(psf.array)
jt_mom = galsim.hsm.FindAdaptiveMom(psfim)
print("GalSim shape: ", gs_mom.observed_shape)
print("batoid shape: ", jt_mom.observed_shape)
print("GalSim centroid: ", gs_mom.moments_centroid)
print("batoid centroid: ", jt_mom.moments_centroid)
print("GalSim size: ", gs_mom.moments_sigma)
print("batoid size: ", jt_mom.moments_sigma)
print("GalSim rho4: ", gs_mom.moments_rho4)
print("batoid rho4: ", jt_mom.moments_rho4)
np.testing.assert_allclose(
gs_mom.observed_shape.g1,
jt_mom.observed_shape.g1,
rtol=0.0, atol=3e-3
)
np.testing.assert_allclose(
gs_mom.observed_shape.g2,
jt_mom.observed_shape.g2,
rtol=0.0, atol=3e-3
)
np.testing.assert_allclose(
gs_mom.moments_centroid.x,
jt_mom.moments_centroid.x,
rtol=0.0, atol=1e-9
)
np.testing.assert_allclose(
gs_mom.moments_centroid.y,
jt_mom.moments_centroid.y,
rtol=0.0, atol=1e-9
)
np.testing.assert_allclose(
gs_mom.moments_sigma,
jt_mom.moments_sigma,
rtol=1e-2 # why not better?!
)
np.testing.assert_allclose(
gs_mom.moments_rho4,
jt_mom.moments_rho4,
rtol=2e-2
)
if plot:
size = scale*npix
import matplotlib.pyplot as plt
fig = plt.figure(figsize=(15, 4))
ax1 = fig.add_subplot(131)
im1 = ax1.imshow(
np.log10(arr),
extent=np.r_[-1,1,-1,1]*size/2,
vmin=-7, vmax=0
)
plt.colorbar(im1, ax=ax1, label=r'$\log_{10}$ flux')
ax1.set_title('GalSim')
ax1.set_xlabel("arcsec")
ax1.set_ylabel("arcsec")
sizeX = dsize_X * npix * 1e6 # microns
ax2 = fig.add_subplot(132)
im2 = ax2.imshow(
np.log10(psf.array),
extent=np.r_[-1,1,-1,1]*sizeX/2,
vmin=-7, vmax=0
)
plt.colorbar(im2, ax=ax2, label=r'$\log_{10}$ flux')
ax2.set_title('batoid')
ax2.set_xlabel(r"$\mu m$")
ax2.set_ylabel(r"$\mu m$")
ax3 = fig.add_subplot(133)
im3 = ax3.imshow(
(psf.array-arr)/np.max(arr),
vmin=-0.01, vmax=0.01,
cmap='seismic'
)
plt.colorbar(im3, ax=ax3, label="(batoid-GalSim)/max(GalSim)")
ax3.set_title('resid')
ax3.set_xlabel(r"$\mu m$")
ax3.set_ylabel(r"$\mu m$")
fig.tight_layout()
plt.show()
