65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
from __future__ import annotations
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import numpy
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# 1nm snap (0.001 µm)
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GRID_SNAP_UM = 0.001
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def snap_nm(value: float) -> float:
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"""
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Snap a coordinate to the nearest 1nm (0.001 um).
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"""
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return round(value * 1000) / 1000
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class Port:
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"""
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A port defined by (x, y, orientation) in micrometers.
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"""
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__slots__ = ('x', 'y', 'orientation')
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def __init__(
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self,
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x: float,
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y: float,
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orientation: float,
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) -> None:
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self.x = snap_nm(x)
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self.y = snap_nm(y)
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self.orientation = float(orientation % 360)
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def __repr__(self) -> str:
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return f'Port(x={self.x}, y={self.y}, orientation={self.orientation})'
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def __eq__(self, other: object) -> bool:
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if not isinstance(other, Port):
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return False
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return (self.x == other.x and
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self.y == other.y and
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self.orientation == other.orientation)
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def __hash__(self) -> int:
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return hash((self.x, self.y, self.orientation))
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def translate_port(port: Port, dx: float, dy: float) -> Port:
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"""
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Translate a port by (dx, dy).
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"""
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return Port(port.x + dx, port.y + dy, port.orientation)
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def rotate_port(port: Port, angle: float, origin: tuple[float, float] = (0, 0)) -> Port:
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"""
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Rotate a port by a multiple of 90 degrees around an origin.
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"""
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ox, oy = origin
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px, py = port.x, port.y
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rad = numpy.radians(angle)
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qx = snap_nm(ox + numpy.cos(rad) * (px - ox) - numpy.sin(rad) * (py - oy))
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qy = snap_nm(oy + numpy.sin(rad) * (px - ox) + numpy.cos(rad) * (py - oy))
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return Port(qx, qy, port.orientation + angle)
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