96 lines
3.1 KiB
GDScript3
96 lines
3.1 KiB
GDScript3
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extends Node2D
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# #105 (#97g): keeps the vessels stationed at outposts in step with what
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# GameState says is stationed there.
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#
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# Garrison vessels are NOT in Fleet.ships. They are spawned here, under a
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# node of their own, so the formation, the fleet's speed fader and
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# max_fleet_size() all continue to be about the fleet - a garrison that
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# counted against the fleet's slots would mean stationing a vessel cost the
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# player a place in their own wedge, which is the opposite of what an outpost
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# is for.
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#
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# The record is the truth, as everywhere else: this node is rebuilt from
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# GameState.garrison_crew() when the space scene loads, so a garrison
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# survives a trip to a planet surface.
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var ship_scene: PackedScene = preload("res://vessels/Ship.tscn")
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const GARRISON_COMPONENT = preload("res://vessels/VesselGarrisonComponent.gd")
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# {outpost_id: [ship, ...]}
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var stationed: Dictionary = {}
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func _ready() -> void:
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add_to_group("garrison_field")
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sync()
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func _process(_delta: float) -> void:
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sync()
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func ships_at(outpost_id: int) -> Array:
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var out: Array = []
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for ship in stationed.get(outpost_id, []):
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if is_instance_valid(ship) and not ship.is_queued_for_deletion():
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out.append(ship)
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return out
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func all_ships() -> Array:
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var out: Array = []
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for outpost_id in stationed:
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out.append_array(ships_at(outpost_id))
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return out
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func sync() -> void:
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# Retire whole outposts that no longer exist, then reconcile the rest.
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for outpost_id in stationed.keys():
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if GameState.find_building(outpost_id).is_empty():
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for ship in ships_at(outpost_id):
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ship.queue_free()
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stationed.erase(outpost_id)
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for outpost_id in GameState.outpost_ids():
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var record: Dictionary = GameState.find_building(outpost_id)
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var crew: Array = GameState.garrison_crew(outpost_id)
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var here: Array = ships_at(outpost_id)
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stationed[outpost_id] = here
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if here.size() == crew.size():
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continue
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if here.size() > crew.size():
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# The record shrank under us - a vessel was released or lost
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# while this node was not looking.
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for i in range(crew.size(), here.size()):
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here[i].queue_free()
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stationed[outpost_id] = here.slice(0, crew.size())
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continue
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for i in range(here.size(), crew.size()):
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here.append(_spawn(outpost_id, String(crew[i]), record.position, i))
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func _spawn(outpost_id: int, vessel_type: String, at: Vector2, index: int) -> Node2D:
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var ship: Area2D = ship_scene.instantiate()
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# Before add_child, so Ship._ready() builds the right vessel - the same
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# order Fleet.add_ship() relies on.
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ship.vessel_type = vessel_type
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var spread: float = TAU * float(index) / 4.0
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ship.position = at + Vector2(cos(spread), sin(spread)) * 170.0
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add_child(ship)
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var component: Node = GARRISON_COMPONENT.new()
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component.outpost_id = outpost_id
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component.station = at
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ship.add_child(component)
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component.setup()
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# A garrison vessel that dies frees its berth, so #104 sends another.
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ship.destroyed.connect(_on_garrison_lost.bind(outpost_id, vessel_type))
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return ship
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func _on_garrison_lost(outpost_id: int, vessel_type: String) -> void:
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var crew: Array = GameState.garrison_crew(outpost_id)
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var index: int = crew.find(vessel_type)
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if index >= 0:
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crew.remove_at(index)
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