def fang(wg_width, length, orientation):
F = Device()
w1 = wg_width
X1 = CrossSection()
X1.add(width=w1, offset=0, layer=30, ports=('in', 'out'))
P = Path()
P.append(pp.euler(radius=50,
angle=45)) # Euler bend (aka "racetrack" curve)
fang = P.extrude(X1)
fang = F.add_ref(fang)
D = pg.taper(length=length,
width1=w1,
width2=0.000001,
port=None,
layer=30)
taper = F.add_ref(D)
taper.connect(port=1, destination=fang.ports['out'])
#Defualt is RU, right up
if orientation == 'RD':
F.mirror(p1=[0, 0], p2=[1, 0])
elif orientation == 'LU':
F.mirror(p1=[0, 0], p2=[0, 1])
elif orientation == 'LD':
F.rotate(180, center=[0, 0])
return F
def arc(radius=10, angle=90, num_pts=720):
""" Create a circular arc Path
Parameters
----------
radius : int or float
Radius of arc
angle : int or float
Total angle of arc
num_pts : int
Number of points used per 360 degrees
Returns
-------
Path
A Path object with the specified arc
"""
num_pts = abs(int(num_pts * angle / 360))
t = np.linspace(-90 * np.pi / 180, (angle - 90) * np.pi / 180, num_pts)
x = radius * np.cos(t)
y = radius * (np.sin(t) + 1)
points = np.array((x, y)).T * np.sign(angle)
P = Path()
# Manually add points & adjust start and end angles
P.points = points
P.start_angle = 0
P.end_angle = angle
return P
def dcpm(L, elec_w, e_e_gap, via, wg_width):
P = Path()
P.append(pp.straight(length=L))
X = CrossSection()
X.add(width=wg_width, offset=0, layer=30)
DCPM = Device()
DCPM << P.extrude(X)
R1 = pg.rectangle(size=(L, elec_w), layer=40)
R2 = pg.rectangle(size=(L, elec_w), layer=40)
DCPM << R1.move([0, e_e_gap / 2])
DCPM << R2.move([0, -elec_w - e_e_gap / 2])
return DCPM
def rfpm(wg_width, length, middle_e_width, e_e_gap):
side_electrode_width = middle_e_width * 2
P = Path()
P.append(pp.straight(length=length))
X = CrossSection()
X.add(width=wg_width, offset=0, layer=30)
RFPM = Device()
RFPM << P.extrude(X)
Rt = pg.rectangle(size=(length, side_electrode_width), layer=40)
Rm = pg.rectangle(size=(length, middle_e_width), layer=40)
Rb = pg.rectangle(size=(length, side_electrode_width), layer=40)
RFPM << Rt.move([0, e_e_gap / 2])
RFPM << Rm.move([0, -middle_e_width - e_e_gap / 2])
RFPM << Rb.move(
[0, -middle_e_width - side_electrode_width - e_e_gap - e_e_gap / 2])
square = middle_e_width * 0.9
side_height = side_electrode_width * 0.9
square_rec_offset = (side_electrode_width - side_height) / 2
square_rec_offset_m = (middle_e_width - square) / 2
e_left = 0
e_right = e_left + length - square
#side_e_width
R = pg.rectangle(size=(length, middle_e_width), layer=40)
R2 = pg.rectangle(size=(length, side_electrode_width), layer=40)
S = pg.rectangle(size=(square, square), layer=50)
S2 = pg.rectangle(size=(square, side_height), layer=50)
#top electrode
h_top = e_e_gap / 2
RFPM.add_ref(S2).move([e_left, h_top + square_rec_offset])
RFPM.add_ref(S2).move([e_right, h_top + square_rec_offset])
#middle electrode
h_mid = -middle_e_width - e_e_gap / 2
RFPM.add_ref(S).move([e_left, h_mid + square_rec_offset_m])
RFPM.add_ref(S).move([e_right, h_mid + square_rec_offset_m])
#bottom electrode
h_bot = -middle_e_width - side_electrode_width - e_e_gap - e_e_gap / 2
RFPM.add_ref(S2).move([e_left, h_bot + square_rec_offset])
RFPM.add_ref(S2).move([e_right, h_bot + square_rec_offset])
return RFPM
def straight(length=5, num_pts=100):
""" Creates a straight Path
Parameters
----------
length : int or float
Total length of straight path
num_pts : int
Number of points along Path
Returns
-------
Path
A Path object with the specified straight section
"""
x = np.linspace(0, length, num_pts)
y = x * 0
points = np.array((x, y)).T
P = Path()
P.append(points)
return P
def euler(radius=3, angle=90, p=1.0, use_eff=False, num_pts=720):
""" Create an Euler bend (also known as "racetrack" or "clothoid" curves)
that adiabatically transitions from straight to curved. By default,
`radius` corresponds to the minimum radius of curvature of the bend.
However, if `use_eff` is set to True, `radius` corresponds to the effective
radius of curvature (making the curve a drop-in replacement for an arc). If
p < 1.0, will create a "partial euler" curve as described in Vogelbacher et.
al. https://dx.doi.org/10.1364/oe.27.031394
Parameters
----------
radius : int or float
Minimum radius of curvature
angle : int or float
Total angle of curve
p : float
Proportion of curve that is an Euler curve
use_eff : bool
If False: `radius` corresponds to minimum radius of curvature of the bend
If True: The curve will be scaled such that the endpoints match an arc
with parameters `radius` and `angle`
num_pts : int
Number of points used per 360 degrees
Returns
-------
Path
A Path object with the specified Euler curve
"""
if (p < 0) or (p > 1):
raise ValueError(
'[PHIDL] euler() requires argument `p` be between 0 and 1')
if p == 0:
P = arc(radius=radius, angle=angle, num_pts=num_pts)
P.info['Reff'] = radius
P.info['Rmin'] = radius
return P
if angle < 0:
mirror = True
angle = np.abs(angle)
else:
mirror = False
R0 = 1
alpha = np.radians(angle)
Rp = R0 / (np.sqrt(p * alpha))
sp = R0 * np.sqrt(p * alpha)
s0 = 2 * sp + Rp * alpha * (1 - p)
num_pts = abs(int(num_pts * angle / 360))
num_pts_euler = int(np.round(sp / (s0 / 2) * num_pts))
num_pts_arc = num_pts - num_pts_euler
xbend1, ybend1 = _fresnel(R0, sp, num_pts_euler)
xp, yp = xbend1[-1], ybend1[-1]
dx = xp - Rp * np.sin(p * alpha / 2)
dy = yp - Rp * (1 - np.cos(p * alpha / 2))
s = np.linspace(sp, s0 / 2, num_pts_arc)
xbend2 = Rp * np.sin((s - sp) / Rp + p * alpha / 2) + dx
ybend2 = Rp * (1 - np.cos((s - sp) / Rp + p * alpha / 2)) + dy
x = np.concatenate([xbend1, xbend2[1:]])
y = np.concatenate([ybend1, ybend2[1:]])
points1 = np.array([x, y]).T
points2 = np.flipud(np.array([x, -y]).T)
points2 = _rotate_points(points2, angle - 180)
points2 += -points2[0, :] + points1[-1, :]
points = np.concatenate([points1[:-1], points2])
# Find y-axis intersection point to compute Reff
start_angle = 180 * (angle < 0)
end_angle = start_angle + angle
dy = np.tan(np.radians(end_angle - 90)) * points[-1][0]
Reff = points[-1][1] - dy
Rmin = Rp
# Fix degenerate condition at angle == 180
if np.abs(180 - angle) < 1e-3:
Reff = points[-1][1] / 2
# Scale curve to either match Reff or Rmin
if use_eff == True:
scale = radius / Reff
else:
scale = radius / Rmin
points *= scale
P = Path()
# Manually add points & adjust start and end angles
P.points = points
P.start_angle = start_angle
P.end_angle = end_angle
P.info['Reff'] = Reff * scale
P.info['Rmin'] = Rmin * scale
if mirror == True:
P.mirror((1, 0))
return P
def smooth(points=[
(20, 0),
(40, 0),
(80, 40),
(80, 10),
(100, 10),
],
radius=4,
corner_fun=euler,
**kwargs):
""" Create a smooth path from a series of waypoints. Corners will be rounded
using `corner_fun` and any additional key word arguments (for example,
`use_eff = True` when `corner_fun = pp.euler`)
Parameters
----------
points : array-like[N][2]
List of waypoints for the path to follow
radius : int or float
Radius of curvature, this argument will be passed to `corner_fun`
corner_fun : function
The function that controls how the corners are rounded. Typically either
`arc()` or `euler()`
**kwargs : dict
Extra keyword arguments that will be passed to `corner_fun`
Returns
-------
Path
A Path object with the specified smoothed path.
"""
points = np.asfarray(points)
normals = np.diff(points, axis=0)
normals = (normals.T / np.linalg.norm(normals, axis=1)).T
# normals_rev = normals*np.array([1,-1])
dx = np.diff(points[:, 0])
dy = np.diff(points[:, 1])
ds = np.sqrt(dx**2 + dy**2)
theta = np.degrees(np.arctan2(dy, dx))
dtheta = np.diff(theta)
# FIXME add caching
# Create arcs
paths = []
radii = []
for dt in dtheta:
P = corner_fun(radius=radius, angle=dt, **kwargs)
chord = np.linalg.norm(P.points[-1, :] - P.points[0, :])
r = (chord / 2) / np.sin(np.radians(dt / 2))
r = np.abs(r)
radii.append(r)
paths.append(P)
d = np.abs(np.array(radii) / np.tan(np.radians(180 - dtheta) / 2))
encroachment = np.concatenate([[0], d]) + np.concatenate([d, [0]])
if np.any(encroachment > ds):
raise ValueError(
'[PHIDL] smooth(): Not enough distance between points to to fit curves. Try reducing the radius or spacing the points out farther'
)
p1 = points[1:-1, :] - normals[:-1, :] * d[:, np.newaxis]
# Move arcs into position
new_points = []
new_points.append([points[0, :]])
for n, dt in enumerate(dtheta):
P = paths[n]
P.rotate(theta[n] - 0)
P.move(p1[n])
new_points.append(P.points)
new_points.append([points[-1, :]])
new_points = np.concatenate(new_points)
P = Path(new_points)
P.move(points[0, :])
return P
def spiral(num_turns=5, gap=1, inner_gap=2, num_pts=10000):
""" Creates a spiral geometry consisting of two oddly-symmetric
semi-circular arcs in the centre and two Archimedean (involute) spiral arms
extending outward from the ends of both arcs.
Parameters
----------
num_turns : int or float
The number of turns in the spiral. Must be greater than 1. A full
spiral rotation counts as 1 turn, and the center arcs will together
always be 0.5 turn.
gap : int or float
The distance between any point on one arm of the spiral and a point
with the same angular coordinate on an adjacent arm.
inner_gap : int or float
The inner size of the spiral, equal to twice the chord length of the
centre arcs.
num_pts: int
The number of points in the entire spiral. The actual number of points
will be slightly different than the specified value, as they are
dynamically allocated using the path lengths of the spiral.
Returns
-------
Path
A Path object forming a spiral
Notes
-----
``num_turns`` usage (x is any whole number):
- ``num_turns = x.0``: Output arm will be extended 0.5 turn to be on
the same side as the input.
- ``num_turns < x.5``: Input arm will be extended by the fractional
amount.
- ``num_turns = x.5``: Both arms will be the same length and the input
and output will be on opposite sides.
- ``num_turns > x.5``: Output arm will be extended by the fractional
amount.
"""
# Establishing number of turns in each arm
if num_turns <= 1:
raise ValueError('num_turns must be greater than 1')
diff = num_turns - np.floor(num_turns)
if diff < 0.5:
num_turns1 = np.floor(num_turns) - 1 + 2 * diff
else:
num_turns1 = np.floor(num_turns)
if diff > 0.5:
num_turns2 = np.floor(num_turns) - 1 + 2 * diff
else:
num_turns2 = np.floor(num_turns)
# Establishing relevant angles and spiral/centre arc parameters
a1 = np.pi / 2
a2 = np.array([np.pi * num_turns1 + a1, np.pi * num_turns2 + a1])
a = inner_gap / 2 - gap / 2
b = gap / np.pi
Rc = inner_gap * np.sqrt(1 + (b / (a + b * a1))**2) / 4
theta = np.degrees(2 * np.arcsin(inner_gap / 4 / Rc))
# Establishing number of points in each arm
s_centre = Rc * np.radians(theta)
s_spiral = ((a + a2 * b)**2 + b**2)**(3 / 2) / (3 * (a * b + (a2 * b**2)))
z = num_pts / (s_spiral[0] + s_spiral[1] + 2 * s_centre)
num_pts0 = int(z * s_centre)
num_pts1 = int(z * s_spiral[0])
num_pts2 = int(z * s_spiral[1]) - num_pts1
# Forming both spiral arms
arm1 = np.linspace(a1, a2[0], num_pts1)
arm2 = np.linspace(a2[0], a2[1], num_pts2)[1:]
a_spiral = np.array([arm1, np.concatenate([arm1, arm2])])
r_spiral = a + b * a_spiral
x_spiral = np.array([np.zeros(num_pts1), np.zeros(len(a_spiral[1]))])
y_spiral = np.array([np.zeros(num_pts1), np.zeros(len(a_spiral[1]))])
for i in range(2):
x_spiral[i] = r_spiral[i] * np.cos(a_spiral[i])
y_spiral[i] = r_spiral[i] * np.sin(a_spiral[i])
# Forming centre arcs
pts = _rotate_points(
arc(Rc, theta, 360 * num_pts0 / theta).points, -theta / 2 + 90)
x_centre = pts[:, 0] + x_spiral[0][0] - pts[:, 0][-1]
y_centre = pts[:, 1] + y_spiral[0][0] - pts[:, 1][-1]
x_centre = np.concatenate([-np.flip(x_centre), x_centre])
y_centre = np.concatenate([-np.flip(y_centre), y_centre])
# Combining into final spiral
x = np.concatenate([-np.flip(x_spiral[1]), x_centre, x_spiral[0]])
y = np.concatenate([-np.flip(y_spiral[1]), y_centre, y_spiral[0]])
points = np.array((x, y)).T
P = Path()
# Manually add points & adjust start and end angles
P.points = points
nx1, ny1 = points[1] - points[0]
P.start_angle = np.arctan2(ny1, nx1) / np.pi * 180
nx2, ny2 = points[-1] - points[-2]
P.end_angle = np.arctan2(ny2, nx2) / np.pi * 180
# print(P.start_angle)
# print(P.end_angle)
return P
def mzi(length, radius, angle, wg_width, Y_mmi):
P1 = Path()
P1.append(pp.euler(radius=radius, angle=-angle))
P1.append(pp.euler(radius=radius, angle=angle))
P1.append(pp.straight(length=length))
P1.append(pp.euler(radius=radius, angle=angle))
P1.append(pp.euler(radius=radius, angle=-angle))
X = CrossSection()
X.add(width=wg_width, offset=0, layer=30)
waveguide_device1 = P1.extrude(X)
E = Device('EOM_GHz')
b1 = E.add_ref(waveguide_device1).move([0, -Y_mmi / 2])
b2 = E.add_ref(waveguide_device1).move([0, -Y_mmi / 2])
b2.mirror((0, 0), (1, 0))
return E
def connect(x2, y2, middle_e_width, chip_width, chip_height, pos, radius,
length, e_e_gap, setpos):
mm = 10**3
um = 1
M = Path()
# Dimensions
margin = 0.5 * mm
to_pad_term = 0.1 * mm
pad = 50 * um
pitch = 100 * um
side_e_width = middle_e_width * 2
rad_gap = e_e_gap + middle_e_width / 2 + side_e_width / 2
if pos == 't':
Rt = radius + rad_gap * 2
elif pos == 'm':
Rt = radius + rad_gap
else:
Rt = radius
if setpos == 't':
set_bias = 0.6 * mm
elif setpos == 'm':
set_bias = 0.3 * mm
else:
set_bias = 0
x1 = (chip_width - length) / 2 - Rt - set_bias
y1 = margin + to_pad_term
points = np.array([(x1, y1), (x1, y2), (x2, y2)])
points = rotate90(points)
M = pp.smooth(
points=points,
radius=Rt,
corner_fun=pp.arc,
)
M.rotate(90)
X = CrossSection()
if pos == 'm':
X.add(width=middle_e_width, offset=0, layer=3)
else:
X.add(width=side_e_width, offset=0, layer=3)
L = M.extrude(X) #Left Trace
if pos == 'm':
# adding pads
S = pg.rectangle(size=(pad, pad), layer=3)
L.add_ref(S).move([x1 - pad / 2, margin])
L.add_ref(S).move([x1 - pad / 2 - pitch, margin])
L.add_ref(S).move([x1 - pad / 2 + pitch, margin])
xm1 = x1 - middle_e_width / 2
xm2 = x1 + middle_e_width / 2
xm3 = x1 + pad / 2
xm4 = x1 - pad / 2
xpts = (xm1, xm2, xm3, xm4)
ypts = (y1, y1, margin + pad, margin + pad)
L.add_polygon([xpts, ypts], layer=3)
xt1 = xm1 + middle_e_width + e_e_gap
xt2 = xt1 + side_e_width
xt3 = xm3 + pitch
xt4 = xm4 + pitch
xpts = (xt1, xt2, xt3, xt4)
ypts = (y1, y1, margin + pad, margin + pad)
L.add_polygon([xpts, ypts], layer=3)
xb1 = xm1 - side_e_width - e_e_gap
xb2 = xm1 - e_e_gap
xb3 = xm3 - pitch
xb4 = xm4 - pitch
xpts = (xb1, xb2, xb3, xb4)
ypts = (y1, y1, margin + pad, margin + pad)
L.add_polygon([xpts, ypts], layer=3)
R = pg.copy(L) # Right Trace
R.mirror((chip_width / 2, chip_height), (chip_width / 2, 0))
D = Device('trace')
D << L
D << R
return D
def eom_sym(wg_width, length, middle_e_width, e_e_gap, chip_width, offset,
radius):
euler_y = mod_euler(radius=radius, angle=-45)[1][1]
euler_x = mod_euler(radius=radius, angle=-45)[1][0]
wg_wg_sep = (middle_e_width + e_e_gap) / 2 - 2 * euler_y
straight = wg_wg_sep * np.sqrt(2)
if wg_wg_sep < 0:
raise Exception(
"middle_e_width is set too small with respect to Euler radius")
left = chip_width / 2 - length / 2 - 2 * euler_x - wg_wg_sep + offset
right = left
P1 = Path()
P1.append(pp.straight(length=left))
P1.append(mod_euler(radius=radius, angle=-45)[0])
P1.append(pp.straight(length=straight))
P1.append(mod_euler(radius=radius, angle=45)[0])
P1.append(pp.straight(length=length))
P1.append(mod_euler(radius=radius, angle=45)[0])
P1.append(pp.straight(length=straight))
P1.append(mod_euler(radius=radius, angle=-45)[0])
P1.append(pp.straight(length=right))
X = CrossSection()
X.add(width=wg_width, offset=0, layer=1)
waveguide_device1 = P1.extrude(X)
E = Device('EOM_GHz')
b1 = E.add_ref(waveguide_device1)
b2 = E.add_ref(waveguide_device1)
b2.mirror((0, 0), (1, 0))
square = middle_e_width * 0.6
square_rec_offset = (middle_e_width - square) / 2
e_left = left + 2 * euler_x + wg_wg_sep
e_right = left + 2 * euler_x + wg_wg_sep + length - square
#side_e_width
R = pg.rectangle(size=(length, middle_e_width), layer=10)
S = pg.rectangle(size=(square, square), layer=2)
#top electrode
h_top = middle_e_width / 2 + e_e_gap
E.add_ref(R).move([e_left, h_top])
E.add_ref(S).move([e_left, h_top + square_rec_offset])
E.add_ref(S).move([e_right, h_top + square_rec_offset])
#middle electrode
E.add_ref(R).move([e_left, -middle_e_width / 2])
E.add_ref(S).move([e_left, -square / 2])
E.add_ref(S).move([e_right, -square / 2])
#bottom electrode
h_bot = -3 * middle_e_width / 2 - e_e_gap
E.add_ref(R).move([e_left, h_bot])
E.add_ref(S).move([e_left, h_bot + square_rec_offset])
E.add_ref(S).move([e_right, h_bot + square_rec_offset])
#E << R
return E
def dcim(im_gap, im_length, coupler_l, im_r, im_angle, elec_w, e_e_gap, via,
wg_width, V_Groove_Spacing):
P = Path()
euler_y = mod_euler(radius=im_r, angle=im_angle)[1][1]
euler_x = mod_euler(radius=im_r, angle=im_angle)[1][0]
l_bend = ((V_Groove_Spacing - im_gap - 4 * euler_y - wg_width) /
2) / np.sin(np.pi * im_angle / 180)
P.append(pp.euler(radius=im_r, angle=-im_angle))
P.append(pp.straight(length=l_bend))
P.append(pp.euler(radius=im_r, angle=im_angle))
P.append(pp.straight(length=coupler_l))
P.append(pp.euler(radius=im_r, angle=im_angle))
P.append(pp.euler(radius=im_r, angle=-im_angle))
P.append(pp.straight(length=im_length))
P.append(pp.euler(radius=im_r, angle=-im_angle))
P.append(pp.euler(radius=im_r, angle=im_angle))
P.append(pp.straight(length=coupler_l))
P.append(pp.euler(radius=im_r, angle=im_angle))
P.append(pp.straight(length=l_bend))
P.append(pp.euler(radius=im_r, angle=-im_angle))
P.movey(V_Groove_Spacing)
X = CrossSection()
X.add(width=wg_width, offset=0, layer=30)
IM = Device('IM')
IM << P.extrude(X)
IM << P.extrude(X).mirror(p1=[1, V_Groove_Spacing / 2],
p2=[2, V_Groove_Spacing / 2])
R1 = pg.rectangle(size=(im_length, elec_w), layer=40)
R2 = pg.rectangle(size=(im_length, elec_w), layer=40)
R3 = pg.rectangle(size=(im_length, elec_w), layer=40)
R4 = pg.rectangle(size=(im_length, elec_w), layer=40)
movex = euler_x * 4 + coupler_l + l_bend * np.cos(np.pi * im_angle / 180)
movey = euler_y * 2 + im_gap / 2 + wg_width
IM << R1.move(
[movex, V_Groove_Spacing / 2 + movey + e_e_gap / 2 - wg_width / 2])
IM << R2.move([
movex,
V_Groove_Spacing / 2 + movey - e_e_gap / 2 - elec_w - wg_width / 2
])
IM << R3.move(
[movex, V_Groove_Spacing / 2 - movey + e_e_gap / 2 + wg_width / 2])
IM << R4.move([
movex,
V_Groove_Spacing / 2 - movey - e_e_gap / 2 - elec_w + wg_width / 2
])
return IM, movex
def smooth(points=[
(20, 0),
(40, 0),
(80, 40),
(80, 10),
(100, 10),
],
radius=4,
corner_fun=euler,
**kwargs):
""" Create a smooth path from a series of waypoints. Corners will be rounded
using `corner_fun` and any additional key word arguments (for example,
`use_eff = True` when `corner_fun = pp.euler`)
Parameters
----------
points : array-like[N][2]
List of waypoints for the path to follow
radius : int or float
Radius of curvature, this argument will be passed to `corner_fun`
corner_fun : function
The function that controls how the corners are rounded. Typically either
`arc()` or `euler()`
**kwargs : dict
Extra keyword arguments that will be passed to `corner_fun`
Returns
-------
Path
A Path object with the specified smoothed path.
"""
points, normals, ds, theta, dtheta = _compute_segments(points)
colinear_elements = np.concatenate([[False],
np.abs(dtheta) < 1e-6, [False]])
if np.any(colinear_elements):
new_points = points[~colinear_elements, :]
points, normals, ds, theta, dtheta = _compute_segments(new_points)
if np.any(np.abs(np.abs(dtheta) - 180) < 1e-6):
raise ValueError(
'[PHIDL] smooth() received points which double-back on themselves'
+
'--turns cannot be computed when going forwards then exactly backwards.'
)
# FIXME add caching
# Create arcs
paths = []
radii = []
for dt in dtheta:
P = corner_fun(radius=radius, angle=dt, **kwargs)
chord = np.linalg.norm(P.points[-1, :] - P.points[0, :])
r = (chord / 2) / np.sin(np.radians(dt / 2))
r = np.abs(r)
radii.append(r)
paths.append(P)
d = np.abs(np.array(radii) / np.tan(np.radians(180 - dtheta) / 2))
encroachment = np.concatenate([[0], d]) + np.concatenate([d, [0]])
if np.any(encroachment > ds):
raise ValueError(
'[PHIDL] smooth(): Not enough distance between points to to fit curves. Try reducing the radius or spacing the points out farther'
)
p1 = points[1:-1, :] - normals[:-1, :] * d[:, np.newaxis]
# Move arcs into position
new_points = []
new_points.append([points[0, :]])
for n, dt in enumerate(dtheta):
P = paths[n]
P.rotate(theta[n] - 0)
P.move(p1[n])
new_points.append(P.points)
new_points.append([points[-1, :]])
new_points = np.concatenate(new_points)
P = Path()
P.rotate(theta[0])
P.append(new_points)
P.move(points[0, :])
return P
def extrude(
p: Path,
cross_section: Optional[CrossSectionOrFactory] = None,
layer: Optional[Layer] = None,
width: Optional[float] = None,
widths: Optional[Float2] = None,
simplify: Optional[float] = None,
) -> Component:
"""Returns Component extruding a Path with a cross_section.
A path can be extruded using any CrossSection returning a Component
The CrossSection defines the layer numbers, widths and offsetts
adapted from phidl.path
Args:
p: a path is a list of points (arc, straight, euler)
cross_section: to extrude
layer:
width:
widths: tuple of starting and end width
simplify: Tolerance value for the simplification algorithm.
All points that can be removed without changing the resulting
polygon by more than the value listed here will be removed.
"""
if cross_section is None and layer is None:
raise ValueError("CrossSection or layer needed")
if cross_section is not None and layer is not None:
raise ValueError("Define only CrossSection or layer")
if layer is not None and width is None and widths is None:
raise ValueError("Need to define layer width or widths")
elif width:
cross_section = CrossSection()
cross_section.add(width=width, layer=layer)
elif widths:
cross_section = CrossSection()
cross_section.add(width=_linear_transition(widths[0], widths[1]), layer=layer)
xsection_points = []
c = Component()
cross_section = cross_section() if callable(cross_section) else cross_section
snap_to_grid = cross_section.info.get("snap_to_grid", None)
for section in cross_section.sections:
width = section["width"]
offset = section["offset"]
layer = section["layer"]
ports = section["ports"]
port_types = section["port_types"]
hidden = section["hidden"]
if isinstance(width, (int, float)) and isinstance(offset, (int, float)):
xsection_points.append([width, offset])
if isinstance(layer, int):
layer = (layer, 0)
if (
isinstance(layer, Iterable)
and len(layer) == 2
and isinstance(layer[0], int)
and isinstance(layer[1], int)
):
xsection_points.append([layer[0], layer[1]])
if callable(offset):
P_offset = p.copy()
P_offset.offset(offset)
points = P_offset.points
start_angle = P_offset.start_angle
end_angle = P_offset.end_angle
offset = 0
else:
points = p.points
start_angle = p.start_angle
end_angle = p.end_angle
if callable(width):
# Compute lengths
dx = np.diff(p.points[:, 0])
dy = np.diff(p.points[:, 1])
lengths = np.cumsum(np.sqrt((dx) ** 2 + (dy) ** 2))
lengths = np.concatenate([[0], lengths])
width = width(lengths / lengths[-1])
else:
pass
points1 = p._centerpoint_offset_curve(
points,
offset_distance=offset + width / 2,
start_angle=start_angle,
end_angle=end_angle,
)
points2 = p._centerpoint_offset_curve(
points,
offset_distance=offset - width / 2,
start_angle=start_angle,
end_angle=end_angle,
)
# Simplify lines using the Ramer–Douglas–Peucker algorithm
if isinstance(simplify, bool):
raise ValueError(
"[PHIDL] the simplify argument must be a number (e.g. 1e-3) or None"
)
if simplify is not None:
points1 = _simplify(points1, tolerance=simplify)
points2 = _simplify(points2, tolerance=simplify)
if snap_to_grid:
snap_to_grid_nm = snap_to_grid * 1e3
points1 = (
snap_to_grid_nm
* np.round(np.array(points1) * 1e3 / snap_to_grid_nm)
/ 1e3
)
points2 = (
snap_to_grid_nm
* np.round(np.array(points2) * 1e3 / snap_to_grid_nm)
/ 1e3
)
# Join points together
points = np.concatenate([points1, points2[::-1, :]])
layers = layer if hidden else [layer, layer]
if not hidden and p.length() > 1e-3:
c.add_polygon(points, layer=layer)
# Add ports if they were specified
if ports[0] is not None:
orientation = (p.start_angle + 180) % 360
_width = width if np.isscalar(width) else width[0]
new_port = c.add_port(
name=ports[0],
layer=layers[0],
port_type=port_types[0],
width=_width,
orientation=orientation,
cross_section=cross_section.cross_sections[0]
if hasattr(cross_section, "cross_sections")
else cross_section,
)
new_port.endpoints = (points1[0], points2[0])
if ports[1] is not None:
orientation = (p.end_angle + 180) % 360
_width = width if np.isscalar(width) else width[-1]
new_port = c.add_port(
name=ports[1],
layer=layers[1],
port_type=port_types[1],
width=_width,
orientation=orientation,
cross_section=cross_section.cross_sections[1]
if hasattr(cross_section, "cross_sections")
else cross_section,
)
new_port.endpoints = (points2[-1], points1[-1])
points = np.concatenate((p.points, np.array(xsection_points)))
c.name = f"path_{hash_points(points)[:26]}"
# c.path = path
# c.cross_section = cross_section
return c