def test_properties():
import random
random.seed(57)
for i in range(100):
x = random.gauss(0.1, 2.3)
y = random.gauss(2.1, 4.3)
z = random.gauss(-0.13, 1.3)
vx = random.gauss(3.1, 6.3)
vy = random.gauss(5.1, 24.3)
vz = random.gauss(-1.13, 31.3)
t = random.gauss(0.1, 1.1)
w = random.gauss(1000.0, 10.0)
f = random.gauss(1000.0, 10.0)
v = random.choice([True, False])
ray1 = batoid.Ray(x, y, z, vx, vy, vz, t, w, f, v)
ray2 = batoid.Ray([x, y, z], [vx, vy, vz], t, w, f, v)
for ray in [ray1, ray2]:
assert ray.x == x
assert ray.y == y
assert ray.z == z
assert ray.vx == vx
assert ray.vy == vy
assert ray.vz == vz
assert ray.t == t
assert ray.wavelength == w
assert ray.vignetted == v
assert ray1 == ray2
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_positionAtTime():
import random
random.seed(5)
for i in range(100):
x = random.gauss(0.1, 2.3)
y = random.gauss(2.1, 4.3)
z = random.gauss(-0.13, 1.3)
vx = random.gauss(3.1, 6.3)
vy = random.gauss(5.1, 24.3)
vz = random.gauss(-1.13, 31.3)
t0 = random.gauss(0.1, 1.1)
t = random.gauss(5.5, 1.3)
# Test both ways of constructing a Ray
ray1 = batoid.Ray(x, y, z, vx, vy, vz, t0)
ray2 = batoid.Ray([x, y, z], [vx, vy, vz], t0)
ray3 = batoid.Ray((x, y, z), (vx, vy, vz), t0)
ray4 = batoid.Ray(np.array([x, y, z]), np.array([vx, vy, vz]), t0)
for ray in [ray1, ray2, ray3, ray4]:
np.testing.assert_allclose(
ray.positionAtTime(t)[0], x + vx * (t - t0))
np.testing.assert_allclose(
ray.positionAtTime(t)[1], y + vy * (t - t0))
np.testing.assert_allclose(
ray.positionAtTime(t)[2], z + vz * (t - t0))
assert ray1 == ray2 == ray3 == ray4
do_pickle(ray1)
def test_paraboloid_reflection_reversal():
import random
random.seed(5772)
para = batoid.Paraboloid(-5.0)
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 = para.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 = para.intersect(return_ray.copy())
# First check that we intersected at the same point
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 = para.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_intersect():
np.random.seed(5772)
def f(x, y):
return x**2*y - y**2*x + 3*x - 2 + np.sin(y)*np.cos(x)**2
xs = np.linspace(0, 1, 1000)
ys = np.linspace(0, 1, 1000)
zs = f(*np.meshgrid(xs, ys))
bc = batoid.Bicubic(xs, ys, zs)
for _ in range(1000):
# If we shoot rays straight up, then it's easy to predict the
# intersection points.
x = np.random.uniform(0.1, 0.9)
y = np.random.uniform(0.1, 0.9)
r0 = batoid.Ray(x, y, -10, 0, 0, 1, 0)
r = bc.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], bc.sag(x, y), rtol=0, atol=1e-9)
# intersect should fail, but gracefully, outside of grid domain
r0 = batoid.Ray(-1, -1, -10, 0, 0, 1, 0)
assert bc.intersect(r0).failed
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():
zernike = batoid.Zernike([0,0,0,0,1])
ray = batoid.Ray([0,0,zernike.sag(0,0)-1], [0,0,-1])
ray = zernike.intersect(ray)
assert ray.failed
ray = batoid.Ray([0,0,zernike.sag(0,0)-1], [0,0,-1])
zernike.intersect(ray)
assert ray.failed
def test_fail():
sphere = batoid.Sphere(1.0)
ray = batoid.Ray([0,0,-1], [0,0,-1])
ray = sphere.intersect(ray)
assert ray.failed
ray = batoid.Ray([0,0,-1], [0,0,-1])
sphere.intersect(ray)
assert ray.failed
def test_fail():
asphere = batoid.Asphere(1.0, 1.0, [1.0, 1.0])
ray = batoid.Ray([0,0,-1], [0,0,-1])
ray = asphere.intersect(ray)
assert ray.failed
ray = batoid.Ray([0,0,-1], [0,0,-1])
asphere.intersect(ray)
assert ray.failed
def test_fail():
para = batoid.Paraboloid(1.0)
ray = batoid.Ray([0,0,-1], [0,0,-1])
ray = para.intersect(ray)
assert ray.failed
ray = batoid.Ray([0,0,-1], [0,0,-1])
para.intersectInPlace(ray)
assert ray.failed
def test_fail():
quad = batoid.Quadric(1.0, 1.0)
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
ray = quad.intersect(ray)
assert ray.failed
ray = batoid.Ray([0, 0, -1], [0, 0, -1])
quad.intersectInPlace(ray)
assert ray.failed
def test_intersect():
import random
random.seed(577)
for i in range(100):
R = random.gauss(25.0, 0.2)
conic = random.uniform(-2.0, 1.0)
quad = batoid.Quadric(R, conic)
for j in range(100):
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, -10), (0, 0, 1), 0)
r = quad.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],
quad.sag(x, y),
rtol=0,
atol=1e-9)
# Check normal for R=0 paraboloid (a plane)
quad = batoid.Quadric(0.0, 0.0)
np.testing.assert_array_equal(quad.normal(0.1, 0.1), [0, 0, 1])
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_intersect_vectorized():
np.random.seed(57721)
jmaxmax = 50
r0s = [
batoid.Ray([
np.random.normal(0.0, 0.1),
np.random.normal(0.0, 0.1),
np.random.normal(10.0, 0.1)
], [
np.random.normal(0.0, 0.1),
np.random.normal(0.0, 0.1),
np.random.normal(-1.0, 0.1)
], np.random.normal(0.0, 0.1)) for i in range(100)
]
r0s = batoid.RayVector(r0s)
for i in range(100):
jmax = np.random.randint(1, jmaxmax)
coef = np.random.normal(size=jmax + 1) * 1e-3
R_outer = np.random.uniform(0.5, 5.0)
R_inner = np.random.uniform(0.0, 0.8 * R_outer)
zernike = batoid.Zernike(coef, R_outer=R_outer, R_inner=R_inner)
r1s = zernike.intersect(r0s)
r2s = batoid.RayVector([zernike.intersect(r0) for r0 in r0s])
assert r1s == r2s
def test_intersect():
np.random.seed(57721)
rv0 = batoid.RayVector([
batoid.Ray(
np.random.normal(scale=0.1),
np.random.normal(scale=0.1),
10,
np.random.normal(scale=1e-4),
np.random.normal(scale=1e-4),
-1
)
for _ in range(100)
])
for _ in range(100):
s1 = batoid.Sphere(np.random.uniform(3, 10))
s2 = batoid.Paraboloid(np.random.uniform(3, 10))
sum = batoid.Sum([s1, s2])
rv = batoid.RayVector(rv0)
rv1 = sum.intersect(rv)
rv2 = batoid.RayVector([sum.intersect(r) for r in rv])
rv3 = batoid.RayVector(rv)
sum.intersectInPlace(rv)
for r in rv3:
sum.intersectInPlace(r)
assert rays_allclose(rv1, rv)
assert rays_allclose(rv2, rv)
assert rays_allclose(rv3, rv)
def test_traceReverse():
if __name__ == '__main__':
nside = 128
else:
nside = 32
telescope = batoid.Optic.fromYaml("HSC.yaml")
init_rays = batoid.rayGrid(20, 12.0, 0.005, 0.005, -1.0, nside, 500e-9, 1.0, batoid.ConstMedium(1.0))
forward_rays = telescope.trace(init_rays)
# Now, turn the result rays around and trace backwards
forward_rays = forward_rays.propagatedToTime(40.0)
reverse_rays = batoid.RayVector(
[batoid.Ray(r.r, -r.v, -r.t, r.wavelength) for r in forward_rays]
)
final_rays = telescope.traceReverse(reverse_rays)
# propagate all the way to t=0
final_rays = final_rays.propagatedToTime(0.0)
final_rays.toCoordSysInPlace(batoid.globalCoordSys)
w = np.where(np.logical_not(final_rays.vignetted))[0]
for idx in w:
np.testing.assert_allclose(init_rays[idx].x, final_rays[idx].x)
np.testing.assert_allclose(init_rays[idx].y, final_rays[idx].y)
np.testing.assert_allclose(init_rays[idx].z, final_rays[idx].z)
np.testing.assert_allclose(init_rays[idx].vx, -final_rays[idx].vx)
np.testing.assert_allclose(init_rays[idx].vy, -final_rays[idx].vy)
np.testing.assert_allclose(init_rays[idx].vz, -final_rays[idx].vz)
np.testing.assert_allclose(final_rays[idx].t, 0)
def test_asphere_refraction_plane():
import random
random.seed(57721)
wavelength = 500e-9 # arbitrary
asphere = batoid.Asphere(25.0, -0.97, [1e-3, 1e-5])
m1 = batoid.ConstMedium(1.7)
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)
v = normalized(np.array([vx, vy, 1]))/m1.getN(wavelength)
ray = batoid.Ray((x, y, -0.1), (v[0], v[1], v[2]), 0)
rray = asphere.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.
# magnitude zero.
normal = asphere.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-14)
# 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_fail():
surface = batoid.Sphere(1.0)
ray = batoid.Ray([0, 10, -1], [0, 0, 1])
ray = surface.intersect(ray)
assert ray.failed
do_pickle(ray)
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_asphere_reflection_coordtransform():
import random
random.seed(5772156)
asphere = batoid.Asphere(23.0, -0.97, [1e-5, 1e-6])
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, -0.1], v, 0)
ray2 = ray.copy()
cs = batoid.CoordSys(
[random.uniform(-0.01, 0.01),
random.uniform(-0.01, 0.01),
random.uniform(-0.01, 0.01)],
(batoid.RotX(random.uniform(-0.01, 0.01))
.dot(batoid.RotY(random.uniform(-0.01, 0.01)))
.dot(batoid.RotZ(random.uniform(-0.01, 0.01)))
)
)
rray = asphere.reflect(ray, coordSys=cs)
rray2 = asphere.reflect(ray2.toCoordSys(cs))
assert ray_isclose(rray, rray2)
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):
R = random.gauss(25.0, 0.2)
conic = random.uniform(-2.0, 1.0)
ncoefs = random.randint(0, 4)
coefs = [random.gauss(0, 1e-10) for i in range(ncoefs)]
asphere = batoid.Asphere(R, conic, coefs)
r1s = asphere.intersect(r0s)
r2s = batoid.RayVector([asphere.intersect(r0) for r0 in r0s])
np.testing.assert_allclose(asphere.sag(r1s.x, r1s.y),
r1s.z,
rtol=0,
atol=1e-12)
assert r1s == r2s
def test_table_medium_refraction():
import random
random.seed(57721566)
filename = os.path.join(batoid.datadir, "media", "silica_dispersion.txt")
wave, n = np.genfromtxt(filename).T
table = batoid.Table(wave, n, batoid.Table.Interpolant.linear)
silica = batoid.TableMedium(table)
air = batoid.ConstMedium(1.000277)
asphere = batoid.Asphere(25.0, -0.97, [1e-3, 1e-5])
for i in range(10000):
x = random.gauss(0, 1)
y = random.gauss(0, 1)
vx = random.gauss(0, 1e-1)
vy = random.gauss(0, 1e-1)
wavelength = random.uniform(0.3, 1.2)
ray = batoid.Ray(x, y, -0.1, vx, vy, 1, 0, wavelength)
cm1 = batoid.ConstMedium(silica.getN(wavelength))
cm2 = batoid.ConstMedium(air.getN(wavelength))
rray1 = asphere.refract(ray, silica, air)
rray2 = asphere.refract(ray, cm1, cm2)
assert rray1 == rray2
def test_traceReverse():
if __name__ == '__main__':
nside = 128
else:
nside = 32
fn = os.path.join(batoid.datadir, "HSC", "HSC.yaml")
config = yaml.load(open(fn))
telescope = batoid.parse.parse_optic(config['opticalSystem'])
init_rays = batoid.rayGrid(20, 12.0, 0.005, 0.005, -1.0, nside, 500e-9,
1.0, batoid.ConstMedium(1.0))
forward_rays, _ = telescope.trace(init_rays, outCoordSys=batoid.CoordSys())
# Now, turn the result rays around and trace backwards
forward_rays = forward_rays.propagatedToTime(40.0)
reverse_rays = batoid.RayVector(
[batoid.Ray(r.r, -r.v, -r.t, r.wavelength) for r in forward_rays])
final_rays, _ = telescope.traceReverse(reverse_rays,
outCoordSys=batoid.CoordSys())
# propagate all the way to t=0
final_rays = final_rays.propagatedToTime(0.0)
w = np.where(np.logical_not(final_rays.vignetted))[0]
for idx in w:
np.testing.assert_allclose(init_rays[idx].x, final_rays[idx].x)
np.testing.assert_allclose(init_rays[idx].y, final_rays[idx].y)
np.testing.assert_allclose(init_rays[idx].z, final_rays[idx].z)
np.testing.assert_allclose(init_rays[idx].vx, -final_rays[idx].vx)
np.testing.assert_allclose(init_rays[idx].vy, -final_rays[idx].vy)
np.testing.assert_allclose(init_rays[idx].vz, -final_rays[idx].vz)
np.testing.assert_allclose(final_rays[idx].t, 0)
def test_HSC_trace():
fn = os.path.join(batoid.datadir, "HSC", "HSC_old.yaml")
config = yaml.load(open(fn))
telescope = batoid.parse.parse_optic(config['opticalSystem'])
# Zemax has a number of virtual surfaces that we don't trace in batoid. Also, the HSC.yaml
# above includes Baffle surfaces not in Zemax. The following lists select out the surfaces in
# common to both models.
HSC_surfaces = [
3, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 24, 25, 28, 29,
31
]
surface_names = [
'PM', 'G1_entrance', 'G1_exit', 'G2_entrance', 'G2_exit',
'ADC1_entrance', 'ADC1_exit', 'ADC2_entrance', 'ADC2_exit',
'G3_entrance', 'G3_exit', 'G4_entrance', 'G4_exit', 'G5_entrance',
'G5_exit', 'F_entrance', 'F_exit', 'W_entrance', 'W_exit', 'D'
]
for fn in [
"HSC_raytrace_1.txt", "HSC_raytrace_2.txt", "HSC_raytrace_3.txt"
]:
filename = os.path.join(directory, "testdata", fn)
with open(filename) as f:
arr = np.loadtxt(f, skiprows=22, usecols=list(range(0, 12)))
arr0 = arr[0]
ray = batoid.Ray(arr0[1] / 1000,
arr0[2] / 1000,
16.0,
arr0[4],
arr0[5],
-arr0[6],
t=0,
wavelength=750e-9)
tf = telescope.traceFull(ray)
i = 0
for surface in tf:
if surface['name'] != surface_names[i]:
continue
s = surface['out']
v = s.v / np.linalg.norm(s.v)
transform = batoid.CoordTransform(surface['outCoordSys'],
batoid.CoordSys())
s = transform.applyForward(s)
bt_isec = np.array([s.x, s.y, s.z - 16.0])
zx_isec = arr[HSC_surfaces[i] - 1][1:4] / 1000
np.testing.assert_allclose(bt_isec, zx_isec, rtol=0,
atol=1e-9) # nanometer agreement
bt_angle = np.array([v[0], v[1], v[2]])
zx_angle = arr[HSC_surfaces[i] - 1][4:7]
# direction cosines agree to 1e-9
np.testing.assert_allclose(bt_angle, zx_angle, rtol=0, atol=1e-9)
i += 1
def randomRay():
import random
return batoid.Ray(
randomVec3(),
randomVec3(),
random.uniform(0, 1),
random.uniform(0, 1),
random.uniform(0, 1),
)
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_asphere_refraction_reversal():
import random
random.seed(577215)
wavelength = 500e-9 # arbitrary
asphere = batoid.Asphere(23.0, -0.97, [1e-5, 1e-6])
m1 = batoid.ConstMedium(1.7)
m2 = batoid.ConstMedium(1.9)
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, -0.1],
normalized(np.array([vx, vy, 1])) /
m1.getN(wavelength), 0)
rray = asphere.refract(ray, m1, m2)
np.testing.assert_allclose(np.linalg.norm(rray.v),
1. / m2.getN(wavelength),
rtol=1e-15)
# 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 = asphere.intersect(return_ray)
# First check that we intersected at the same point
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 = asphere.refract(return_ray, m2, m1)
np.testing.assert_allclose(np.linalg.norm(cray.v),
1. / m1.getN(wavelength),
rtol=1e-15)
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], -0.1, rtol=0, atol=1e-10)
def test_paraboloid_refraction_plane():
import random
random.seed(577)
wavelength = 500e-9 # arbitrary
para = batoid.Paraboloid(-20.0)
m1 = batoid.ConstMedium(1.11)
m2 = batoid.ConstMedium(1.32)
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 = normalized(np.array([vx, vy, 1])) / m1.getN(wavelength)
ray = batoid.Ray(x, y, -10, v[0], v[1], v[2], 0)
rray = para.refract(ray, m1, m2)
np.testing.assert_allclose(np.linalg.norm(rray.v),
1. / m2.getN(wavelength),
rtol=1e-15)
# also check refractInPlace
rray2 = batoid.Ray(ray)
para.refractInPlace(rray2, m1, m2)
assert rray == rray2
# 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.
normal = para.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_HSC_trace():
telescope = batoid.Optic.fromYaml("HSC_old.yaml")
# Zemax has a number of virtual surfaces that we don't trace in batoid. Also, the HSC.yaml
# above includes Baffle surfaces not in Zemax. The following lists select out the surfaces in
# common to both models.
HSC_surfaces = [
3, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 24, 25, 28, 29,
31
]
surface_names = [
'PM', 'G1_entrance', 'G1_exit', 'G2_entrance', 'G2_exit',
'ADC1_entrance', 'ADC1_exit', 'ADC2_entrance', 'ADC2_exit',
'G3_entrance', 'G3_exit', 'G4_entrance', 'G4_exit', 'G5_entrance',
'G5_exit', 'F_entrance', 'F_exit', 'W_entrance', 'W_exit', 'D'
]
for fn in [
"HSC_raytrace_1.txt", "HSC_raytrace_2.txt", "HSC_raytrace_3.txt"
]:
filename = os.path.join(directory, "testdata", fn)
with open(filename) as f:
arr = np.loadtxt(f, skiprows=22, usecols=list(range(0, 12)))
arr0 = arr[0]
ray = batoid.Ray((arr0[1] / 1000, arr0[2] / 1000, 16.0),
(arr0[4], arr0[5], -arr0[6]),
t=0,
wavelength=750e-9)
tf = telescope.traceFull(ray)
i = 0
for name in surface_names:
surface = tf[name]
s = surface['out']
v = s.v / np.linalg.norm(s.v)
s.toCoordSysInPlace(batoid.CoordSys())
bt_isec = np.array([s.x, s.y, s.z - 16.0])
zx_isec = arr[HSC_surfaces[i] - 1][1:4] / 1000
np.testing.assert_allclose(bt_isec, zx_isec, rtol=0,
atol=1e-9) # nanometer agreement
bt_angle = np.array([v[0], v[1], v[2]])
zx_angle = arr[HSC_surfaces[i] - 1][4:7]
# direction cosines agree to 1e-9
np.testing.assert_allclose(bt_angle, zx_angle, rtol=0, atol=1e-9)
i += 1
