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67 lines
2.3 KiB
Python
67 lines
2.3 KiB
Python
"""Objective adjacency lists."""
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from __future__ import annotations
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from typing import Dict, Iterator, List, Optional, TYPE_CHECKING
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from game.utils import Distance
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if TYPE_CHECKING:
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from game.theater import ConflictTheater, ControlPoint, MissionTarget
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class ClosestAirfields:
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"""Precalculates which control points are closes to the given target."""
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def __init__(
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self, target: MissionTarget, all_control_points: List[ControlPoint]
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) -> None:
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self.target = target
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# This cache is configured once on load, so it's important that it is
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# complete and deterministic to avoid different behaviors across loads.
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# E.g. https://github.com/dcs-liberation/dcs_liberation/issues/819
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self.closest_airfields: List[ControlPoint] = sorted(
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all_control_points, key=lambda c: self.target.distance_to(c)
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)
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@property
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def operational_airfields(self) -> Iterator[ControlPoint]:
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return (
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c
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for c in self.closest_airfields
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if c.runway_is_operational() or c.has_helipads
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)
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def airfields_within(self, distance: Distance) -> Iterator[ControlPoint]:
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"""Iterates over all airfields within the given range of the target.
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Note that this iterates over *all* airfields, not just friendly
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airfields.
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"""
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for cp in self.closest_airfields:
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if cp.distance_to(self.target) < distance.meters:
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yield cp
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else:
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break
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class ObjectiveDistanceCache:
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theater: Optional[ConflictTheater] = None
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closest_airfields: Dict[str, ClosestAirfields] = {}
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@classmethod
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def set_theater(cls, theater: ConflictTheater) -> None:
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if cls.theater is not None:
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cls.closest_airfields = {}
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cls.theater = theater
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@classmethod
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def get_closest_airfields(cls, location: MissionTarget) -> ClosestAirfields:
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if cls.theater is None:
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raise RuntimeError("Call ObjectiveDistanceCache.set_theater before using")
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if location.name not in cls.closest_airfields:
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cls.closest_airfields[location.name] = ClosestAirfields(
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location, cls.theater.controlpoints
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)
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return cls.closest_airfields[location.name]
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