def build_ports(self):
# Portlist format:
# example: example: {'port':(x_position, y_position), 'direction': 'NORTH'}
self.portlist["input"] = {
'port': (self.trace[0][0], self.trace[0][1]),
'direction': tk.get_direction(self.trace[1], self.trace[0])
}
self.portlist["output"] = {
'port': (self.trace[-1][0], self.trace[-1][1]),
'direction': tk.get_direction(self.trace[-2], self.trace[-1])
}
def build_cell(self):
# Sequentially build all the geometric shapes using gdspy path functions
# for waveguide, then add it to the Cell
br = self.mt.bend_radius
path = gdspy.Path(self.mt.width, self.trace[0])
path2 = gdspy.Path(self.mt.width + 2 * self.mt.clad_width,
self.trace[0])
prior_direction = tk.get_direction(self.trace[0], self.trace[1])
if br != 0:
""" Path routing for curved bends. Same as in waveguide class. """
path.segment(tk.dist(self.trace[0], self.trace[1]) - br,
direction=tk.get_angle(self.trace[0], self.trace[1]),
**self.spec)
path2.segment(tk.dist(self.trace[0], self.trace[1]) - br,
direction=tk.get_angle(self.trace[0], self.trace[1]),
**self.clad_spec)
for i in range(len(self.trace) - 2):
direction = tk.get_direction(self.trace[i + 1],
self.trace[i + 2])
turn = tk.get_turn(prior_direction, direction)
path.turn(br, turn, number_of_points=0.1, **self.spec)
path2.turn(br, turn, number_of_points=0.1, **self.clad_spec)
if tk.dist(
self.trace[i + 1], self.trace[i + 2]
) - 2 * br > 0: #ONLY False for last points if spaced br < distance < 2br
path.segment(
tk.dist(self.trace[i + 1], self.trace[i + 2]) - 2 * br,
**self.spec)
path2.segment(
tk.dist(self.trace[i + 1], self.trace[i + 2]) - 2 * br,
**self.clad_spec)
prior_direction = direction
if tk.dist(self.trace[-2], self.trace[-1]) < 2 * br:
path.segment(
tk.dist(self.trace[-2], self.trace[-1]) - br, **self.spec)
path2.segment(
tk.dist(self.trace[-2], self.trace[-1]) - br,
**self.clad_spec)
else:
path.segment(br, **self.spec)
path2.segment(br, **self.clad_spec)
if len(self.trace) == 2 and tk.dist(
self.trace[1], self.trace[0]) <= self.mt.bend_radius:
path = gdspy.Path(self.mt.width, self.trace[0])
path.segment(tk.dist(self.trace[0], self.trace[1]),
direction=tk.get_angle(self.trace[0],
self.trace[1]),
**self.spec)
path2 = gdspy.Path(self.mt.width + 2 * self.mt.clad_width,
self.trace[0])
path2.segment(tk.dist(self.trace[0], self.trace[1]),
direction=tk.get_angle(self.trace[0],
self.trace[1]),
**self.clad_spec)
elif br == 0:
""" Do path routing for sharp 90 degree trace bends """
path.segment(tk.dist(self.trace[0], self.trace[1]),
direction=tk.get_angle(self.trace[0], self.trace[1]),
**self.spec)
path2.segment(tk.dist(self.trace[0], self.trace[1]),
direction=tk.get_angle(self.trace[0], self.trace[1]),
**self.clad_spec)
for i in range(len(self.trace) - 2):
""" Add a square to fill in the corner """
self.add(
gdspy.Rectangle(
(self.trace[i + 1][0] - self.mt.width / 2.0,
self.trace[i + 1][1] - self.mt.width / 2.0),
(self.trace[i + 1][0] + self.mt.width / 2.0,
self.trace[i + 1][1] + self.mt.width / 2.0),
**self.spec))
self.add(
gdspy.Rectangle(
(self.trace[i + 1][0] - self.mt.width / 2.0 -
self.mt.clad_width, self.trace[i + 1][1] -
self.mt.width / 2.0 - self.mt.clad_width),
(self.trace[i + 1][0] + self.mt.width / 2.0 +
self.mt.clad_width, self.trace[i + 1][1] +
self.mt.width / 2.0 + self.mt.clad_width),
**self.clad_spec))
angle = tk.get_angle(self.trace[i + 1], self.trace[i + 2])
path.segment(tk.dist(self.trace[i + 1], self.trace[i + 2]),
direction=angle,
**self.spec)
path2.segment(tk.dist(self.trace[i + 1], self.trace[i + 2]),
direction=angle,
**self.clad_spec)
""" Extra padding """
if tk.get_direction(self.trace[0],
self.trace[1]) == 'EAST' or tk.get_direction(
self.trace[0], self.trace[1]) == 'WEST':
pad_ll = (self.trace[0][0] - self.mt.clad_width, self.trace[0][1] -
self.mt.width / 2.0 - self.mt.clad_width)
pad_ul = (self.trace[0][0] + self.mt.clad_width, self.trace[0][1] +
self.mt.width / 2.0 + self.mt.clad_width)
else:
pad_ll = (self.trace[0][0] - self.mt.width / 2.0 -
self.mt.clad_width,
self.trace[0][1] - self.mt.clad_width)
pad_ul = (self.trace[0][0] + self.mt.width / 2.0 +
self.mt.clad_width,
self.trace[0][1] + self.mt.clad_width)
self.add(gdspy.Rectangle(pad_ll, pad_ul, **self.clad_spec))
if tk.get_direction(self.trace[-2],
self.trace[-1]) == 'EAST' or tk.get_direction(
self.trace[-2], self.trace[-1]) == 'WEST':
pad_ll = (self.trace[-1][0] - self.mt.clad_width,
self.trace[-1][1] - self.mt.width / 2.0 -
self.mt.clad_width)
pad_ul = (self.trace[-1][0] + self.mt.clad_width,
self.trace[-1][1] + self.mt.width / 2.0 +
self.mt.clad_width)
else:
pad_ll = (self.trace[-1][0] - self.mt.width / 2.0 -
self.mt.clad_width,
self.trace[-1][1] - self.mt.clad_width)
pad_ul = (self.trace[-1][0] + self.mt.width / 2.0 +
self.mt.clad_width,
self.trace[-1][1] + self.mt.clad_width)
self.add(gdspy.Rectangle(pad_ll, pad_ul, **self.clad_spec))
self.add(path)
self.add(path2)