inire/examples/08_custom_bend_geometry.py

from shapely.geometry import Polygon, box

from inire import CongestionOptions, NetSpec, RoutingOptions, RoutingProblem, SearchOptions, route
from inire.geometry.components import BendCollisionModel, BendPhysicalGeometry
from inire.geometry.primitives import Port
from inire.utils.visualization import plot_routing_results


def _run_session(
    bounds: tuple[float, float, float, float],
    net_id: str,
    start: Port,
    target: Port,
    *,
    bend_collision_type: BendCollisionModel = "arc",
    bend_proxy_geometry: BendCollisionModel | None = None,
    bend_physical_geometry: BendPhysicalGeometry | None = None,
) -> dict[str, object]:
    problem = RoutingProblem(
        bounds=bounds,
        nets=(NetSpec(net_id, start, target, width=2.0),),
    )
    options = RoutingOptions(
        search=SearchOptions(
            bend_radii=(10.0,),
            bend_collision_type=bend_collision_type,
            bend_proxy_geometry=bend_proxy_geometry,
            bend_physical_geometry=bend_physical_geometry,
            sbend_radii=(),
        ),
        congestion=CongestionOptions(max_iterations=1, use_tiered_strategy=False),
    )
    return route(problem, options=options).results_by_net


def main() -> None:
    print("Running Example 08: Custom Bend Geometry...")

    bounds = (0, 0, 150, 150)
    start = Port(20, 20, 0)
    target = Port(100, 100, 90)
    custom_physical = Polygon([(0, -11), (11, -11), (11, 0), (9, 0), (9, -9), (0, -9)])
    custom_proxy = box(0, -11, 11, 0)

    print("Routing standard arc in its own session...")
    results_std = _run_session(bounds, "standard_arc", start, target)
    print("Routing custom geometry with a separate custom proxy in its own session...")
    results_custom = _run_session(
        bounds,
        "custom_geometry_and_proxy",
        start,
        target,
        bend_physical_geometry=custom_physical,
        bend_proxy_geometry=custom_proxy,
    )

    all_results = {**results_std, **results_custom}
    fig, _ax = plot_routing_results(
        all_results,
        [],
        bounds,
        netlist={
            "standard_arc": (start, target),
            "custom_geometry_and_proxy": (start, target),
        },
    )
    fig.savefig("examples/08_custom_bend_geometry.png")
    print("Saved plot to examples/08_custom_bend_geometry.png")


if __name__ == "__main__":
    main()