Dumb, basically broken, trader AI

actors/trader.gd

@@ -0,0 +1,62 @@
+extends Node3D
+class_name Trader
+
+## AI for a ship that behaves like a trader, avoiding combat.
+##
+## [b]This script expects the parent node to be a [Ship].[/b]
+
+# TODO: Deduplicate code with Pirate class.
+
+## For thrusting, the tolerance (in degrees) for being slightly off-rotated.
+@export var direction_tolerance_deg: float = 10.0
+
+## The tolerance (in m) for hitting the destination point, before selecting a new one.
+@export var destination_tolerance: float = 1.0
+
+@onready var _ship := self.get_parent() as Ship
+var _direction_tolerance_rad: float
+var _destination: Node3D = null
+
+func _ready() -> void:
+    self._direction_tolerance_rad = deg_to_rad(self.direction_tolerance_deg)
+
+func _select_new_destination() -> void:
+    var planets: Array[Node3D] = []
+    planets.assign(self.get_tree().get_nodes_in_group("planets"))
+    if self._destination:
+        planets.erase(self._destination)
+
+    self._destination = planets.pick_random() if planets else null
+
+func _desired_direction() -> Vector3:
+    if not self._destination:
+        return Vector3.ZERO
+
+    return (self._destination.global_position - self._ship.global_position).normalized()
+
+func _pointing_in_direction(direction: Vector3) -> bool:
+    var current_direction := - self._ship.global_transform.basis.z
+    return current_direction.angle_to(direction) <= self._direction_tolerance_rad
+
+func _distance_to_destination() -> float:
+    if not self._destination:
+        return 0.0
+
+    return self._ship.global_position.distance_to(self._destination.global_position)
+
+func _physics_process(_delta: float) -> void:
+    if not self._destination:
+        self._select_new_destination()
+
+    var desired_direction := self._desired_direction()
+    self._ship.rigid_body_direction.direction = desired_direction
+
+    if not self._pointing_in_direction(desired_direction):
+        self._ship.rigid_body_thruster.throttle = 0.0
+        return
+
+    if self._distance_to_destination() > self.destination_tolerance:
+        self._ship.rigid_body_thruster.throttle = 1.0
+    else:
+        self._ship.rigid_body_thruster.throttle = 0.0
+        self._select_new_destination()

actors/trader.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3 uid="uid://dpwohjd3mf1e"]
+
+[ext_resource type="Script" path="res://actors/trader.gd" id="1_1k1lj"]
+
+[node name="Trader" type="Node3D"]
+script = ExtResource("1_1k1lj")

galaxy/star_systems/scenes/sol.tscn

@@ -1,11 +1,35 @@
-[gd_scene load_steps=7 format=3 uid="uid://2mdsbbko7baw"]
+[gd_scene load_steps=14 format=3 uid="uid://2mdsbbko7baw"]
 
 [ext_resource type="PackedScene" uid="uid://cji43wyk7116p" path="res://stars/star.tscn" id="1_j8iws"]
 [ext_resource type="PackedScene" uid="uid://b04hfgkcuq7k6" path="res://planets/planet.tscn" id="3_7gpxn"]
 [ext_resource type="Texture2D" uid="uid://bqxxjmbapro8l" path="res://planets/sprites/planet_02.png" id="4_afp06"]
 [ext_resource type="Texture2D" uid="uid://bege8n4jjcej5" path="res://planets/sprites/planet_37.png" id="5_hnp7v"]
 [ext_resource type="Texture2D" uid="uid://dkelmabwfrb5x" path="res://planets/sprites/planet_23.png" id="5_k6fyb"]
 [ext_resource type="PackedScene" uid="uid://dqrul5pyjbxjc" path="res://ships/freighter/freighter.tscn" id="6_uk08c"]
+[ext_resource type="Script" path="res://combat/shield.gd" id="7_pkdss"]
+[ext_resource type="Script" path="res://combat/hull.gd" id="8_ibfoc"]
+[ext_resource type="Script" path="res://power/battery.gd" id="9_w4i7k"]
+[ext_resource type="PackedScene" uid="uid://dpwohjd3mf1e" path="res://actors/trader.tscn" id="10_dpriv"]
+
+[sub_resource type="Resource" id="Resource_oen30"]
+resource_local_to_scene = true
+script = ExtResource("7_pkdss")
+max_integrity = 150.0
+integrity = 150.0
+recharge_rate = 5.0
+power_efficiency = 1.0
+
+[sub_resource type="Resource" id="Resource_yterj"]
+resource_local_to_scene = true
+script = ExtResource("8_ibfoc")
+max_integrity = 300.0
+integrity = 300.0
+
+[sub_resource type="Resource" id="Resource_eyrkq"]
+resource_local_to_scene = true
+script = ExtResource("9_w4i7k")
+max_power = 300.0
+power = 300.0
 
 [node name="Sol" type="Node3D" groups=["star_system"]]
 
@@ -36,6 +60,27 @@ texture = ExtResource("5_k6fyb")
 [node name="Freighter" parent="." instance=ExtResource("6_uk08c")]
 transform = Transform3D(0.759975, 0, -0.649952, 0, 1, 0, 0.649952, 0, 0.759975, -5.22228, 0, -4.59493)
 
+[node name="CombatObject" parent="Freighter" index="2"]
+shield = SubResource("Resource_oen30")
+hull = SubResource("Resource_yterj")
+
+[node name="RigidBodyDirection" parent="Freighter" index="3"]
+battery = SubResource("Resource_eyrkq")
+
+[node name="RigidBodyThruster" parent="Freighter" index="4"]
+battery = SubResource("Resource_eyrkq")
+
+[node name="PowerManagementUnit" parent="Freighter" index="5"]
+battery = SubResource("Resource_eyrkq")
+
+[node name="ShieldRecharger" parent="Freighter" index="7"]
+battery = SubResource("Resource_eyrkq")
+shield = SubResource("Resource_oen30")
+
+[node name="Trader" parent="Freighter" instance=ExtResource("10_dpriv")]
+
 [editable path="Mars"]
 [editable path="Mercury"]
 [editable path="Venus"]
+[editable path="Freighter"]
+[editable path="Freighter/CombatObject/TargetOverlay"]

planets/planet.tscn

@@ -14,7 +14,7 @@ bottom_radius = 1.0
 height = 0.001
 cap_bottom = false
 
-[node name="Planet" type="Node3D"]
+[node name="Planet" type="Node3D" groups=["planets"]]
 
 [node name="MinimapIcon" type="MeshInstance3D" parent="."]
 layers = 2