def test_ne():
objs = [
batoid.Sphere(1.0),
batoid.Sphere(2.0),
batoid.Plane()
]
all_obj_diff(objs)
def test_sag():
np.random.seed(57)
for _ in range(100):
s1 = batoid.Sphere(np.random.uniform(1, 3))
s2 = batoid.Paraboloid(np.random.uniform(1, 3))
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) + s2.sag(x, y),
rtol=1e-12,
atol=1e-12
)
s3 = batoid.Quadric(np.random.uniform(3, 5), np.random.uniform(-0.1, 0.1))
sum2 = batoid.Sum([s1, s2, s3])
np.testing.assert_allclose(
sum2.sag(x, y),
s1.sag(x, y) + s2.sag(x, y) + s3.sag(x, y),
rtol=1e-12,
atol=1e-12
)
def test_refract():
rng = np.random.default_rng(577215)
size = 10_000
for _ in range(100):
s1 = batoid.Sphere(1. / rng.normal(0., 0.2))
s2 = batoid.Paraboloid(rng.uniform(1, 3))
sum = batoid.Sum([s1, s2])
m0 = batoid.ConstMedium(rng.normal(1.2, 0.01))
m1 = batoid.ConstMedium(rng.normal(1.3, 0.01))
x = rng.uniform(-1, 1, size=size)
y = rng.uniform(-1, 1, size=size)
z = np.full_like(x, -10.0)
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(sum, rv.copy(), m0, m1)
rvr2 = sum.refract(rv.copy(), m0, m1)
rays_allclose(rvr, rvr2)
# print(f"{np.sum(rvr.failed)/len(rvr)*100:.2f}% failed")
normal = sum.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_reflect():
rng = np.random.default_rng(57721)
size = 10_000
for _ in range(100):
s1 = batoid.Sphere(1. / rng.normal(0., 0.2))
s2 = batoid.Paraboloid(rng.uniform(1, 3))
sum = batoid.Sum([s1, s2])
x = rng.uniform(-1, 1, size=size)
y = rng.uniform(-1, 1, size=size)
z = np.full_like(x, -10.0)
vx = rng.uniform(-1e-5, 1e-5, size=size)
vy = rng.uniform(-1e-5, 1e-5, size=size)
vz = np.full_like(x, 1)
rv = batoid.RayVector(x, y, z, vx, vy, vz)
rvr = batoid.reflect(sum, rv.copy())
rvr2 = sum.reflect(rv.copy())
rays_allclose(rvr, rvr2)
# print(f"{np.sum(rvr.failed)/len(rvr)*100:.2f}% failed")
normal = sum.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_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_properties():
np.random.seed(5)
for _ in range(100):
s1 = batoid.Sphere(np.random.uniform(1, 3))
s2 = batoid.Paraboloid(np.random.uniform(1, 3))
sum = batoid.Sum([s1, s2])
do_pickle(sum)
# check commutativity
assert sum == batoid.Sum([s2, s1])
# order of sum.surfaces is not guaranteed
assert s1 in sum.surfaces
assert s2 in sum.surfaces
s3 = batoid.Quadric(np.random.uniform(3, 5), np.random.uniform(-0.1, 0.1))
sum2 = batoid.Sum([s1, s2, s3])
do_pickle(sum2)
# check commutativity
assert sum2 == batoid.Sum([s2, s3, s1])
assert sum2 == batoid.Sum([s3, s1, s2])
assert sum2 == batoid.Sum([s3, s2, s1])
assert sum2 == batoid.Sum([s2, s1, s3])
assert sum2 == batoid.Sum([s1, s3, s2])
assert s1 in sum2.surfaces
assert s2 in sum2.surfaces
assert s3 in sum2.surfaces
do_pickle(sum)
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_properties():
rng = np.random.default_rng(5)
for i in range(100):
R = rng.normal(0.0, 0.3) # negative allowed
sphere = batoid.Sphere(R)
assert sphere.R == R
do_pickle(sphere)
def test_normal():
rng = np.random.default_rng(577)
for i in range(100):
R = 1. / rng.normal(0.0, 0.3)
sphere = batoid.Sphere(R)
for j in range(10):
x = rng.uniform(-0.7 * abs(R), 0.7 * abs(R))
y = rng.uniform(-0.7 * abs(R), 0.7 * abs(R))
result = sphere.normal(x, y)
r = np.hypot(x, y)
rat = r / R
dzdr = rat / np.sqrt(1 - rat * rat)
nz = 1 / np.sqrt(1 + dzdr * dzdr)
normal = np.array([-x / r * dzdr * nz, -y / r * dzdr * nz, nz])
np.testing.assert_allclose(result, normal)
# Check 0,0
np.testing.assert_equal(sphere.normal(0, 0), np.array([0, 0, 1]))
# Check vectorization
x = rng.uniform(-0.7 * abs(R), 0.7 * abs(R), size=(10, 10))
y = rng.uniform(-0.7 * abs(R), 0.7 * abs(R), size=(10, 10))
r = np.hypot(x, y)
rat = r / R
dzdr = rat / np.sqrt(1 - rat * rat)
nz = 1 / np.sqrt(1 + dzdr * dzdr)
normal = np.dstack([-x / r * dzdr * nz, -y / r * dzdr * nz, nz])
np.testing.assert_allclose(sphere.normal(x, y), normal)
# Make sure non-unit stride arrays also work
np.testing.assert_allclose(sphere.normal(x[::5, ::2], y[::5, ::2]),
normal[::5, ::2])
def test_sag():
rng = np.random.default_rng(57)
for i in range(100):
R = 1. / rng.normal(0.0, 0.3)
sphere = batoid.Sphere(R)
for j in range(10):
x = rng.uniform(-0.7 * abs(R), 0.7 * abs(R))
y = rng.uniform(-0.7 * abs(R), 0.7 * abs(R))
result = sphere.sag(x, y)
np.testing.assert_allclose(
result, R * (1 - np.sqrt(1.0 - (x * x + y * y) / R / R)))
# Check that it returned a scalar float and not an array
assert isinstance(result, float)
# Check 0,0
np.testing.assert_allclose(sphere.sag(0, 0), 0.0, rtol=0, atol=1e-17)
# Check vectorization
x = rng.uniform(-0.7 * abs(R), 0.7 * abs(R), size=(10, 10))
y = rng.uniform(-0.7 * abs(R), 0.7 * abs(R), size=(10, 10))
np.testing.assert_allclose(
sphere.sag(x, y), R * (1 - np.sqrt(1.0 - (x * x + y * y) / R / R)))
# Make sure non-unit stride arrays also work
np.testing.assert_allclose(
sphere.sag(x[::5, ::2], y[::5, ::2]),
R * (1 - np.sqrt(1.0 - (x * x + y * y) / R / R))[::5, ::2])
do_pickle(sphere)
def test_reflect():
rng = np.random.default_rng(57721)
size = 10_000
for i in range(100):
R = 1. / rng.normal(0.0, 0.3)
sphere = batoid.Sphere(R)
x = rng.uniform(-0.3 * abs(R), 0.3 * abs(R), size=size)
y = rng.uniform(-0.3 * abs(R), 0.3 * abs(R), size=size)
z = np.full_like(x, -2 * abs(R))
vx = rng.uniform(-1e-5, 1e-5, size=size)
vy = rng.uniform(-1e-5, 1e-5, size=size)
vz = np.full_like(x, 1)
rv = batoid.RayVector(x, y, z, vx, vy, vz)
rvr = batoid.reflect(sphere, rv.copy())
rvr2 = sphere.reflect(rv.copy())
rays_allclose(rvr, rvr2)
# print(f"{np.sum(rvr.failed)/len(rvr)*100:.2f}% failed")
normal = sphere.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_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_ne():
objs = [
batoid.Quadric(10.0, 1.0),
batoid.Quadric(11.0, 1.0),
batoid.Quadric(10.0, 1.1),
batoid.Sphere(10.0)
]
all_obj_diff(objs)
def test_properties():
import random
random.seed(5)
for i in range(100):
R = random.gauss(0.7, 0.8)
sphere = batoid.Sphere(R)
assert sphere.R == R
do_pickle(sphere)
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_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():
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 wavefront(optic, theta_x, theta_y, wavelength, nx=32, sphereRadius=None):
"""Compute wavefront.
Parameters
----------
optic : batoid.Optic
Optic for which to compute wavefront.
theta_x, theta_y : float
Field of incoming rays (gnomic projection)
wavelength : float
Wavelength of incoming rays
nx : int, optional
Size of ray grid to generate to compute wavefront. Default: 32
sphereRadius : float, optional
Radius of reference sphere in meters. If None, then use optic.sphereRadius.
Returns
-------
wavefront : batoid.Lattice
A batoid.Lattice object containing the wavefront values in waves and
the primitive lattice vectors of the entrance pupil grid in meters.
"""
dirCos = gnomicToDirCos(theta_x, theta_y)
rays = batoid.rayGrid(
optic.dist, optic.pupilSize,
dirCos[0], dirCos[1], -dirCos[2],
nx, wavelength, 1.0, optic.inMedium
)
if sphereRadius is None:
sphereRadius = optic.sphereRadius
outCoordSys = batoid.CoordSys()
optic.traceInPlace(rays, outCoordSys=outCoordSys)
w = np.where(1-rays.vignetted)[0]
point = np.mean(rays.r[w], axis=0)
# We want to place the vertex of the reference sphere one radius length away from the
# intersection point. So transform our rays into that coordinate system.
transform = batoid.CoordTransform(
outCoordSys, batoid.CoordSys(point+np.array([0,0,sphereRadius])))
transform.applyForwardInPlace(rays)
sphere = batoid.Sphere(-sphereRadius)
sphere.intersectInPlace(rays)
w = np.where(1-rays.vignetted)[0]
# Should potentially try to make the reference time w.r.t. the chief ray instead of the mean
# of the good (unvignetted) rays.
t0 = np.mean(rays.t[w])
arr = np.ma.masked_array((t0-rays.t)/wavelength, mask=rays.vignetted).reshape(nx, nx)
primitiveVectors = np.vstack([[optic.pupilSize/nx, 0], [0, optic.pupilSize/nx]])
return batoid.Lattice(arr, primitiveVectors)
def test_intersect():
import random
random.seed(577)
for i in range(100):
R = random.gauss(10.0, 0.1)
sphere = batoid.Sphere(R)
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 = sphere.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], sphere.sag(x, y), rtol=0, atol=1e-9)
# Check normal for R=0 paraboloid (a plane)
sphere = batoid.Sphere(0.0)
np.testing.assert_array_equal(sphere.normal(0.1,0.1), [0,0,1])
def test_reflect():
rng = np.random.default_rng(577)
for i in range(1000):
R = rng.uniform(1.0, 2.0)
sphere = batoid.Sphere(R)
reflectivity = rng.uniform(0, 1)
transmissivity = rng.uniform(0, 1)
coating = batoid.SimpleCoating(reflectivity, transmissivity)
rv = batoid.RayVector(0, 0, 10, 0, 0, -1, 0, 500e-9, 1.0)
sphere.reflect(rv, coating=coating)
assert (rv.flux[0] == reflectivity)
def wavefront(optic,
wavelength,
theta_x=0,
theta_y=0,
nx=32,
rays=None,
saveRays=False,
sphereRadius=None):
if rays is None:
xcos = np.sin(theta_x)
ycos = np.sin(theta_y)
zcos = -np.sqrt(1.0 - xcos**2 - ycos**2)
rays = batoid.rayGrid(optic.dist, optic.pupilSize, xcos, ycos, zcos,
nx, wavelength, optic.inMedium)
if saveRays:
rays = batoid.RayVector(rays)
if sphereRadius is None:
sphereRadius = optic.sphereRadius
outCoordSys = batoid.CoordSys()
optic.traceInPlace(rays, outCoordSys=outCoordSys)
goodRays = batoid._batoid.trimVignetted(rays)
point = np.array(
[np.mean(goodRays.x),
np.mean(goodRays.y),
np.mean(goodRays.z)])
# We want to place the vertex of the reference sphere one radius length away from the
# intersection point. So transform our rays into that coordinate system.
transform = batoid.CoordTransform(
outCoordSys, batoid.CoordSys(point + np.array([0, 0, sphereRadius])))
transform.applyForwardInPlace(rays)
sphere = batoid.Sphere(-sphereRadius)
sphere.intersectInPlace(rays)
goodRays = batoid._batoid.trimVignetted(rays)
# Should potentially try to make the reference time w.r.t. the chief ray instead of the mean
# of the good (unvignetted) rays.
t0 = np.mean(goodRays.t0)
ts = rays.t0[:]
isV = rays.isVignetted[:]
ts -= t0
ts /= wavelength
wf = np.ma.masked_array(ts, mask=isV)
return wf
def test_sphere():
rng = np.random.default_rng(5772156)
size = 1000
for i in range(100):
R = 1/rng.normal(0.0, 0.3)
conic = 0.0
quad = batoid.Quadric(R, conic)
sphere = batoid.Sphere(R)
x = rng.uniform(-0.7*R, 0.7*R, size=size)
y = rng.uniform(-0.7*R, 0.7*R, size=size)
np.testing.assert_allclose(
quad.sag(x,y), sphere.sag(x, y),
rtol=0, atol=1e-11
)
np.testing.assert_allclose(
quad.normal(x,y), sphere.normal(x, y),
rtol=0, atol=1e-11
)
def test_refract():
rng = np.random.default_rng(5772)
for i in range(1000):
R = rng.uniform(1.0, 2.0)
sphere = batoid.Sphere(R)
reflectivity = rng.uniform(0, 1)
transmissivity = rng.uniform(0, 1)
coating = batoid.SimpleCoating(reflectivity, transmissivity)
m1 = batoid.ConstMedium(rng.uniform(1.1, 1.2))
m2 = batoid.ConstMedium(rng.uniform(1.2, 1.3))
rv = batoid.RayVector(0, 0, 10, 0, 0, -1, 0, 500e-9, 1.0)
sphere.refract(rv, m1, m2, coating=coating)
assert (rv.flux[0] == transmissivity)
def test_properties():
rng = np.random.default_rng(5)
for i in range(100):
s1 = batoid.Sphere(rng.uniform(1, 3))
s2 = batoid.Paraboloid(rng.uniform(1, 3))
sum = batoid.Sum([s1, s2])
do_pickle(sum)
assert s1 is sum.surfaces[0]
assert s2 is sum.surfaces[1]
s3 = batoid.Quadric(rng.uniform(3, 5), rng.uniform(-0.1, 0.1))
sum2 = batoid.Sum([s1, s2, s3])
do_pickle(sum2)
assert s1 is sum2.surfaces[0]
assert s2 is sum2.surfaces[1]
assert s3 is sum2.surfaces[2]
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(0.05, 0.01)
sphere = batoid.Sphere(R)
r1s = sphere.intersect(r0s.copy())
r2s = batoid.RayVector([sphere.intersect(r0.copy()) for r0 in r0s])
assert r1s == r2s
def test_properties():
np.random.seed(5)
for _ in range(100):
s1 = batoid.Sphere(np.random.uniform(1, 3))
s2 = batoid.Paraboloid(np.random.uniform(1, 3))
sum = batoid.Sum([s1, s2])
do_pickle(sum)
assert s1 is sum.surfaces[0]
assert s2 is sum.surfaces[1]
s3 = batoid.Quadric(np.random.uniform(3, 5), np.random.uniform(-0.1, 0.1))
sum2 = batoid.Sum([s1, s2, s3])
do_pickle(sum2)
assert s1 is sum2.surfaces[0]
assert s2 is sum2.surfaces[1]
assert s3 is sum2.surfaces[2]
do_pickle(sum)
def test_sag():
import random
random.seed(57)
for i in range(100):
R = random.gauss(4.2, 0.3)
sphere = batoid.Sphere(R)
for j in range(10):
x = random.uniform(-0.7*R, 0.7*R)
y = random.uniform(-0.7*R, 0.7*R)
result = sphere.sag(x, y)
np.testing.assert_allclose(result, R*(1-math.sqrt(1.0-(x*x + y*y)/R/R)))
# Check that it returned a scalar float and not an array
assert isinstance(result, float)
# Check vectorization
x = np.random.uniform(-0.7*R, 0.7*R, size=(10, 10))
y = np.random.uniform(-0.7*R, 0.7*R, size=(10, 10))
np.testing.assert_allclose(sphere.sag(x, y), R*(1-np.sqrt(1.0-(x*x + y*y)/R/R)))
# Make sure non-unit stride arrays also work
np.testing.assert_allclose(
sphere.sag(x[::5,::2], y[::5,::2]),
(R*(1-np.sqrt(1.0-(x*x + y*y)/R/R)))[::5, ::2]
)
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_intersect():
rng = np.random.default_rng(5772)
size = 10_000
for _ in range(100):
s1 = batoid.Sphere(1. / rng.normal(0., 0.2))
s2 = batoid.Paraboloid(rng.uniform(1, 3))
sum = batoid.Sum([s1, s2])
sumCoordSys = batoid.CoordSys(origin=[0, 0, -1])
x = rng.uniform(-1, 1, size=size)
y = rng.uniform(-1, 1, size=size)
z = np.full_like(x, -10.0)
# 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, -10.0)
rv2 = batoid.intersect(sum, rv.copy(), sumCoordSys)
assert rv2.coordSys == sumCoordSys
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,
sum.sag(x, y) - 1,
rtol=0,
atol=1e-12)
# Check default intersect coordTransform
rv2 = rv.copy().toCoordSys(sumCoordSys)
batoid.intersect(sum, rv2)
assert rv2.coordSys == sumCoordSys
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,
sum.sag(x, y) - 1,
rtol=0,
atol=1e-12)
def test_intersect():
rng = np.random.default_rng(5772)
size = 10_000
for i in range(100):
R = 1. / rng.normal(0.0, 0.3)
sphereCoordSys = batoid.CoordSys(origin=[0, 0, -1])
sphere = batoid.Sphere(R)
x = rng.uniform(-0.3 * abs(R), 0.3 * abs(R), size=size)
y = rng.uniform(-0.3 * abs(R), 0.3 * abs(R), size=size)
z = np.full_like(x, -2 * abs(R))
# 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, -2 * abs(R))
rv2 = batoid.intersect(sphere, rv.copy(), sphereCoordSys)
assert rv2.coordSys == sphereCoordSys
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,
sphere.sag(x, y) - 1,
rtol=0,
atol=1e-9)
# Check default intersect coordTransform
rv2 = rv.copy().toCoordSys(sphereCoordSys)
batoid.intersect(sphere, rv2)
assert rv2.coordSys == sphereCoordSys
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,
sphere.sag(x, y) - 1,
rtol=0,
atol=1e-9)
