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https://github.com/dcs-liberation/dcs_liberation.git
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dda5955121
This alters the DEAD task planning to be the *least* preferred task, but prevents other tasks from being planned unless they are excepted to be clear of air defenses first. Even so, missions are a guaranteed success so those other missions will still get SEAD escorts if there's potential for a SAM in the area. This means that air defenses that are not protecting a more useful target (like a convoy, armor column, building, etc) will no longer be considered by the mission planner. This isn't *quite* right since we currently only check the target area for air defenses rather than the entire flight plan, so there's a chance that we ignore IADS that have threatened ingress points (though that's mostly solved by the flight plan layout). This also is still slightly limited because it's not checking for aircraft availability at this stage yet, so we may aggressively plan missions that we should be skipping unless we can guarantee that the DEAD mission was planned. However, that's not new behavior.
253 lines
9.8 KiB
Python
253 lines
9.8 KiB
Python
from __future__ import annotations
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from functools import singledispatchmethod
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from typing import Optional, TYPE_CHECKING, Union, Iterable, Any
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from dcs.mapping import Point as DcsPoint
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from shapely.geometry import (
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LineString,
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MultiPolygon,
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Point as ShapelyPoint,
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Polygon,
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)
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from shapely.geometry.base import BaseGeometry
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from shapely.ops import nearest_points, unary_union
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from game.data.doctrine import Doctrine
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from game.theater import ControlPoint, MissionTarget, TheaterGroundObject
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from game.utils import Distance, meters, nautical_miles
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from gen.flights.closestairfields import ObjectiveDistanceCache
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from gen.flights.flight import Flight, FlightWaypoint
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if TYPE_CHECKING:
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from game import Game
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ThreatPoly = Union[MultiPolygon, Polygon]
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class ThreatZones:
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def __init__(
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self,
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airbases: ThreatPoly,
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air_defenses: ThreatPoly,
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radar_sam_threats: ThreatPoly,
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) -> None:
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self.airbases = airbases
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self.air_defenses = air_defenses
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self.radar_sam_threats = radar_sam_threats
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self.all = unary_union([airbases, air_defenses])
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def closest_boundary(self, point: DcsPoint) -> DcsPoint:
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boundary, _ = nearest_points(
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self.all.boundary, self.dcs_to_shapely_point(point)
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)
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return DcsPoint(boundary.x, boundary.y)
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def distance_to_threat(self, point: DcsPoint) -> Distance:
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boundary = self.closest_boundary(point)
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return meters(boundary.distance_to_point(point))
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# Type checking ignored because singledispatchmethod doesn't work with required type
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# definitions. The implementation methods are all typed, so should be fine.
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@singledispatchmethod
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def threatened(self, position) -> bool: # type: ignore
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raise NotImplementedError
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@threatened.register
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def _threatened_geometry(self, position: BaseGeometry) -> bool:
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return self.all.intersects(position)
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@threatened.register
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def _threatened_dcs_point(self, position: DcsPoint) -> bool:
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return self.all.intersects(self.dcs_to_shapely_point(position))
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def path_threatened(self, a: DcsPoint, b: DcsPoint) -> bool:
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return self.threatened(
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LineString([self.dcs_to_shapely_point(a), self.dcs_to_shapely_point(b)])
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)
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# Type checking ignored because singledispatchmethod doesn't work with required type
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# definitions. The implementation methods are all typed, so should be fine.
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@singledispatchmethod
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def threatened_by_aircraft(self, target) -> bool: # type: ignore
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raise NotImplementedError
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@threatened_by_aircraft.register
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def _threatened_by_aircraft_geom(self, position: BaseGeometry) -> bool:
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return self.airbases.intersects(position)
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@threatened_by_aircraft.register
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def _threatened_by_aircraft_flight(self, flight: Flight) -> bool:
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return self.threatened_by_aircraft(
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LineString((self.dcs_to_shapely_point(p.position) for p in flight.points))
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)
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@threatened_by_aircraft.register
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def _threatened_by_aircraft_mission_target(self, target: MissionTarget) -> bool:
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return self.threatened_by_aircraft(self.dcs_to_shapely_point(target.position))
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def waypoints_threatened_by_aircraft(
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self, waypoints: Iterable[FlightWaypoint]
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) -> bool:
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return self.threatened_by_aircraft(
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LineString((self.dcs_to_shapely_point(p.position) for p in waypoints))
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)
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# Type checking ignored because singledispatchmethod doesn't work with required type
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# definitions. The implementation methods are all typed, so should be fine.
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@singledispatchmethod
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def threatened_by_air_defense(self, target) -> bool: # type: ignore
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raise NotImplementedError
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@threatened_by_air_defense.register
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def _threatened_by_air_defense_geom(self, position: BaseGeometry) -> bool:
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return self.air_defenses.intersects(position)
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@threatened_by_air_defense.register
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def _threatened_by_air_defense_flight(self, flight: Flight) -> bool:
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return self.threatened_by_air_defense(
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LineString((self.dcs_to_shapely_point(p.position) for p in flight.points))
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)
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@threatened_by_air_defense.register
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def _threatened_by_air_defense_mission_target(self, target: MissionTarget) -> bool:
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return self.threatened_by_air_defense(
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self.dcs_to_shapely_point(target.position)
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)
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# Type checking ignored because singledispatchmethod doesn't work with required type
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# definitions. The implementation methods are all typed, so should be fine.
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@singledispatchmethod
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def threatened_by_radar_sam(self, target) -> bool: # type: ignore
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raise NotImplementedError
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@threatened_by_radar_sam.register
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def _threatened_by_radar_sam_geom(self, position: BaseGeometry) -> bool:
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return self.radar_sam_threats.intersects(position)
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@threatened_by_radar_sam.register
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def _threatened_by_radar_sam_flight(self, flight: Flight) -> bool:
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return self.threatened_by_radar_sam(
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LineString((self.dcs_to_shapely_point(p.position) for p in flight.points))
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)
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def waypoints_threatened_by_radar_sam(
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self, waypoints: Iterable[FlightWaypoint]
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) -> bool:
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return self.threatened_by_radar_sam(
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LineString((self.dcs_to_shapely_point(p.position) for p in waypoints))
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)
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@classmethod
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def closest_enemy_airbase(
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cls, location: ControlPoint, max_distance: Distance
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) -> Optional[ControlPoint]:
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airfields = ObjectiveDistanceCache.get_closest_airfields(location)
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for airfield in airfields.all_airfields_within(max_distance):
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if airfield.captured != location.captured:
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return airfield
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return None
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@classmethod
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def barcap_threat_range(
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cls, doctrine: Doctrine, control_point: ControlPoint
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) -> Distance:
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cap_threat_range = (
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doctrine.cap_max_distance_from_cp + doctrine.cap_engagement_range
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)
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opposing_airfield = cls.closest_enemy_airbase(
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control_point, cap_threat_range * 2
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)
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if opposing_airfield is None:
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return cap_threat_range
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airfield_distance = meters(
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opposing_airfield.position.distance_to_point(control_point.position)
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)
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# BARCAPs should not commit further than halfway to the closest enemy
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# airfield (with some breathing room) to avoid those missions becoming
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# offensive. For dissimilar doctrines we could weight this so that, as
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# an example, modern US goes no closer than 70% of the way to the WW2
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# German base, and the Germans go no closer than 30% of the way to the
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# US base, but for now equal weighting is fine.
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max_distance = airfield_distance * 0.45
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return min(cap_threat_range, max_distance)
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@classmethod
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def for_faction(cls, game: Game, player: bool) -> ThreatZones:
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"""Generates the threat zones projected by the given coalition.
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Args:
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game: The game to generate the threat zone for.
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player: True if the coalition projecting the threat zone belongs to
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the player.
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Returns:
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The threat zones projected by the given coalition. If the threat
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zone belongs to the player, it is the zone that will be avoided by
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the enemy and vice versa.
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"""
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air_threats = []
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air_defenses = []
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for control_point in game.theater.control_points_for(player):
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air_threats.append(control_point)
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air_defenses.extend(control_point.ground_objects)
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return cls.for_threats(
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game.faction_for(player).doctrine, air_threats, air_defenses
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)
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@classmethod
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def for_threats(
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cls,
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doctrine: Doctrine,
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barcap_locations: Iterable[ControlPoint],
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air_defenses: Iterable[TheaterGroundObject[Any]],
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) -> ThreatZones:
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"""Generates the threat zones projected by the given locations.
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Args:
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doctrine: The doctrine of the owning coalition.
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barcap_locations: The locations that will be considered for BARCAP planning.
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air_defenses: TGOs that may have air defenses.
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Returns:
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The threat zones projected by the given locations. If the threat zone
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belongs to the player, it is the zone that will be avoided by the enemy and
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vice versa.
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"""
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air_threats = []
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air_defense_threats = []
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radar_sam_threats = []
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for barcap in barcap_locations:
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point = ShapelyPoint(barcap.position.x, barcap.position.y)
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cap_threat_range = cls.barcap_threat_range(doctrine, barcap)
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air_threats.append(point.buffer(cap_threat_range.meters))
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for tgo in air_defenses:
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for group in tgo.groups:
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threat_range = tgo.threat_range(group)
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# Any system with a shorter range than this is not worth
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# even avoiding.
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if threat_range > nautical_miles(3):
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point = ShapelyPoint(tgo.position.x, tgo.position.y)
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threat_zone = point.buffer(threat_range.meters)
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air_defense_threats.append(threat_zone)
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radar_threat_range = tgo.threat_range(group, radar_only=True)
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if radar_threat_range > nautical_miles(3):
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point = ShapelyPoint(tgo.position.x, tgo.position.y)
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threat_zone = point.buffer(threat_range.meters)
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radar_sam_threats.append(threat_zone)
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return cls(
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airbases=unary_union(air_threats),
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air_defenses=unary_union(air_defense_threats),
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radar_sam_threats=unary_union(radar_sam_threats),
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)
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@staticmethod
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def dcs_to_shapely_point(point: DcsPoint) -> ShapelyPoint:
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return ShapelyPoint(point.x, point.y)
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