spaceship/buildings/BuildingField.gd
Loïc Wisniewski c221584848 #99 (#97a): buildings have health, and can be destroyed
Nothing can attack a structure that cannot be hurt, so this is the floor the
rest of #97 stands on.

max_hp is per definition - an extractor bolted to a rock is not the
mothership - and the current value lives on the RECORD in GameState, not on
the Building node. Main.tscn is torn down and rebuilt on every trip to a
planet surface, so damage kept on a node would heal itself the moment the
player landed.

A record written before this carries no hp field at all. That reads as
undamaged rather than as zero, or an existing save would open on a field of
wrecks.

The mothership cannot be destroyed - it floors at 1hp. The bank, the hangar
and research all live there and a wiped fleet rebuilds there, so losing it
would be a soft-lock with no route back. Keyed on the "bank" capability
rather than on the type: whatever building holds the bank is the one that
cannot be lost.

Destroying a hub retires its transporters. Everything else keyed on a
building id already copes with the building being gone - a transporter
mid-delivery puts its cargo back rather than destroying it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-23 13:37:40 +02:00

77 lines
2.6 KiB
GDScript

extends Node2D
# Rebuilds every player-placed structure from GameState when the space
# scene loads, and answers "is the fleet standing on one?".
#
# Buildings live in GameState rather than in the scene because Main.tscn is
# torn down and recreated on every trip to a planet's surface - anything
# kept only as a node would be lost on the first landing.
@onready var fleet: Node2D = get_node("../Fleet")
var building_scene: PackedScene = preload("res://buildings/Building.tscn")
var spawned: Array = []
# Nothing happens here per frame any more. Arriving at the mothership used to
# bank the fleet's hold automatically (#14), edge-triggered so that ore
# withdrawn while parked was not instantly taken back. #24 removes it
# entirely: unloading is now an explicit move in the transfer menu, in both
# directions and at every building, so an automatic one-way exception at the
# mothership was the odd case out - and it silently overrode a player who had
# just loaded the hold in order to carry ore somewhere else.
func _ready() -> void:
# #99: the record is the truth, so the node follows it out. Connected
# here rather than in Building.gd because the field owns `spawned` and
# would otherwise be left holding a freed node.
if not GameState.building_destroyed.is_connected(_on_building_destroyed):
GameState.building_destroyed.connect(_on_building_destroyed)
rebuild_all()
func _on_building_destroyed(building_id: int, _type: String) -> void:
var kept: Array = []
for b in spawned:
if not is_instance_valid(b):
continue
if int(b.building_id) == building_id:
BuildingExplosionVFX.spawn(get_tree().root, b.global_position)
b.queue_free()
continue
kept.append(b)
spawned = kept
func rebuild_all() -> void:
for b in spawned:
if is_instance_valid(b):
b.queue_free()
spawned.clear()
for record in GameState.buildings:
_spawn(record)
func place(type: String, at_position: Vector2) -> void:
GameState.add_building(type, at_position)
_spawn(GameState.buildings[-1])
func get_building_fleet_is_on() -> Node2D:
var centre: Vector2 = fleet.get_centroid()
for b in spawned:
if is_instance_valid(b) and b.position.distance_to(centre) <= b.interact_radius:
return b
return null
func _spawn(record: Dictionary) -> void:
var b: Node2D = building_scene.instantiate()
b.position = record.position
b.definition_id = record.type
b.building_id = int(record.get("id", 0))
# Deferred for the same reason as the other field spawners: this can run
# from inside a parent's _ready() chain, where a direct add_child() is
# rejected while the tree is still setting up children.
get_parent().add_child.call_deferred(b)
spawned.append(b)