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#105 (#97g): garrison vessels patrol and defend their outpost

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A garrisoned vessel circles its post, engages what comes into range, and
goes back to circling. It steers by writing move_target and lets Ship's own
steering fly it, so it accelerates, banks and brakes exactly like a vessel
in the formation.

It is not in Fleet.ships. It does not follow the formation, does not count
against max_fleet_size(), and does not move when the player flies away -
which is the whole point of stationing it. A garrison that ate a fleet slot
would mean stationing a vessel cost the player a place in their own wedge.

The leash is the load-bearing part. Enemies are judged from the POST rather
than from the vessel, so a garrison that has drifted out to its leash cannot
see further still and be walked away from its outpost one enemy at a time,
and an engagement is clamped to a circle around the post rather than to a
straight line, so it still manoeuvres while pinned.

The orbit starts from where the vessel actually is rather than a random
bearing. A random one makes the first move_target a point on the far side of
the circle, and the vessel flies straight across the middle - through the
outpost it is guarding.

EnemyTargets.nearest_ship now searches the player_ships GROUP instead of
Fleet.ships: an enemy that ignored the guns shooting at it, because they
were not in the player's formation, would let a garrison hold a position
without ever being fought back.

The laser vessel is deliberately not garrisonable. Firing the laser lives in
LaserController, a fleet ability driven by the laser button, rather than in
VesselLaserComponent - so a garrisoned laser would hold its position and
never shoot, and offering a vessel that cannot fight is worse than a short
list.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Loïc Wisniewski 2026-08-23 14:13:47 +02:00
commit bd0cc842ff
5 changed files with 444 additions and 6 deletions
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4
world/Main.tscn
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@ -22,6 +22,7 @@
[ext_resource type="Script" path="res://ui/SkillTreeView.gd" id="21"]
[ext_resource type="Script" path="res://ui/WaveAlert.gd" id="32"]
[ext_resource type="Script" path="res://ui/GarrisonPanel.gd" id="33"]
[ext_resource type="Script" path="res://vessels/GarrisonField.gd" id="34"]
[ext_resource type="Script" path="res://logistics/TransporterField.gd" id="23"]
[ext_resource type="Script" path="res://ui/ResourceBar.gd" id="24"]
[ext_resource type="Script" path="res://logistics/VesselDeliveryField.gd" id="26"]
@ -90,6 +91,9 @@ script = ExtResource("11")
[node name="BuildingField" type="Node2D" parent="."]
script = ExtResource("14")
[node name="GarrisonField" type="Node2D" parent="."]
script = ExtResource("34")
[node name="TransporterField" type="Node2D" parent="."]
script = ExtResource("23")