Source code for gdsfactory.components.spiral_double

from __future__ import annotations

import gdsfactory as gf
from gdsfactory.components import bend_circular
from gdsfactory.path import spiral_archimedean




@gf.cell
def spiral_double(
    min_bend_radius: float | None = None,
    separation: float = 2.0,
    number_of_loops: float = 3,
    npoints: int = 1000,
    cross_section: gf.typings.CrossSectionSpec = "xs_sc",
    bend: gf.typings.ComponentSpec = bend_circular,
) -> gf.Component:
    """Returns a spiral double (spiral in, and then out).

    Args:
        min_bend_radius: inner radius of the spiral. Defaults to cross_section radius.
        separation: separation between the loops.
        number_of_loops: number of loops per spiral.
        npoints: points for the spiral.
        cross_section: cross-section to extrude the structure with.
        bend: factory for the bends in the middle of the double spiral.
    """
    component = gf.Component()
    xs = gf.get_cross_section(cross_section)
    min_bend_radius = min_bend_radius or xs.radius

    bend = gf.get_component(
        bend, radius=min_bend_radius / 2, angle=180, cross_section=cross_section
    )
    bend1 = component.add_ref(bend).mirror()
    bend2 = component.add_ref(bend)
    bend2.connect("o2", bend1.ports["o1"])

    path = spiral_archimedean(
        min_bend_radius=min_bend_radius,
        separation=separation,
        number_of_loops=number_of_loops,
        npoints=npoints,
    )
    path.start_angle = 0
    path.end_angle = 0

    spiral = path.extrude(cross_section=cross_section)
    spiral1 = component.add_ref(spiral).connect("o1", bend1.ports["o2"])
    spiral2 = component.add_ref(spiral).connect("o1", bend2.ports["o1"])

    component.add_port("o1", port=spiral1.ports["o2"])
    component.add_port("o2", port=spiral2.ports["o2"])

    component.info["length"] = float(path.length() + bend.info["length"]) * 2
    return component



if __name__ == "__main__":
    c = spiral_double(
        min_bend_radius=10,
        separation=2,
        number_of_loops=3,
        npoints=1000,
        cross_section="xs_sc",
    )
    print(c.ports["o1"].orientation)
    print(c.ports["o2"].orientation)
    c.show(show_ports=True)