Add defend command

core/battlefield.gd

@@ -1,8 +1,14 @@
 extends Node2D
 class_name BattleField
 
+@export var commands: Node
+
 var _ticker1 := 0.0
 
+func _ready():
+	if not commands:
+		push_warning("No commands manager set to battlefield")
+
 func _physics_process(delta):
 	_ticker1 += delta
 	if _ticker1 > 1.0:
@@ -12,5 +18,14 @@ func _physics_process(delta):
 func ticker(group_name: String):
 	get_tree().call_group_flags(SceneTree.GROUP_CALL_DEFERRED, group_name, "tick")
 
-func _on_commands_changed(commander, commands):
+func _on_commands_changed(comms):
-	get_tree().call_group("unit", "_on_commands_changed", commander, commands)
+	get_tree().call_group("unit", "_on_commands_changed", comms)
+
+func _on_child_entered_tree(node):
+	if node is Unit:
+		node.promoted.connect(_send_commands_to_unit.bind(node))
+		_send_commands_to_unit(node)
+		
+func _send_commands_to_unit(unit: Unit):
+	if commands:
+		unit._on_commands_changed(commands.get_active())

core/spawner.gd

@@ -30,13 +30,19 @@ func _physics_process(delta):
 	if _spawning_since > spawn_duration:
 		spawn()
 		
+func get_battlefield() -> BattleField:
+	return find_parent("battlefield") as BattleField
+		
 func spawn():
 	if unit_type:
 		var unit := unit_type.instantiate()
 		if unit is Unit:
 			_spawning_since = min(0.0, _spawning_since - spawn_duration)
-			# FIXME add to battlefield
 			unit.player = player
-			add_child(unit)
+			var battlefield := get_battlefield()
+			if battlefield:
+				battlefield.add_child(unit)
+			else:
+				add_child(unit)
 			unit.global_position = global_position
 			unit.move_to(delivery)

core/tools.gd

@@ -0,0 +1,19 @@
+class_name Tools
+
+# Get the nearest node from a list, satisfying a predicate
+static func get_nearest(from: Node2D, nodes: Array[Node], predicate: Callable) -> Node2D:
+	var from_position := from.global_position
+	var nearest: Node2D = null
+	var distance := INF
+	for node in nodes:
+		if predicate.call(node):
+			var d := from_position.distance_to(node.global_position)
+			if d < distance:
+				distance = d
+				nearest = node
+	return nearest
+	
+# Get a random position around a fixed position, in a given radius
+static func jitter(pos: Vector2, min_dist = 0.0, max_dist = 100.0) -> Vector2:
+	# TODO uniform distribution
+	return pos + Vector2.from_angle(randf_range(0.0, PI * 2.0)) * randf_range(min_dist, max_dist)

core/ui/command.gd

@@ -12,19 +12,19 @@ signal clicked
 			icon = PlaceholderTexture2D.new()
 		_check_compose()
 
-@export var color: Color:
+@export var player: Node:
 	set(val):
-		if val is Color:
+		if val is Player:
-			color = val
+			player = val
 		else:
-			color = Color.BLACK
+			player = null
 		_check_compose()
 		
 @export var code: String
 		
 func _compose():
 	%icon.texture = icon
-	%badge.self_modulate = color
+	%badge.self_modulate = player.color if player else Color.GRAY
 	super._compose()
 	
 func apply(container: Node2D, pos: Vector2):

core/ui/command.tscn

@@ -16,7 +16,6 @@ fill_to = Vector2(0.5, 0)
 
 [node name="command" type="Node2D"]
 script = ExtResource("1_bwbsk")
-color = Color(0, 0, 0, 1)
 code = ""
 
 [node name="badge" type="TextureButton" parent="."]

core/ui/commands.gd

@@ -11,7 +11,7 @@ extends Node2D
 
 @export var available_commands: Array[PackedScene]
 
-signal commands_changed(commander, commands)
+signal commands_changed(commands)
 
 func _ready():
 	%stock.visible = false
@@ -20,6 +20,7 @@ func _ready():
 	if available_commands:
 		for command_scene in available_commands:
 			var command := command_scene.instantiate()
+			command.player = player
 			%stock.add_child(command)
 
 func _show_command_wheel(pos: Vector2):
@@ -37,7 +38,6 @@ func _show_command_wheel(pos: Vector2):
 	for command in %stock.get_children():
 		# TODO only available
 		command = command.duplicate()
-		command.color = player.color
 		command.position = Vector2.from_angle(inc * idx) * 200.0
 		command.connect("clicked", _on_wheel_command_clicked.bind(command), CONNECT_ONE_SHOT)
 		var line := Line2D.new()
@@ -55,11 +55,11 @@ func _on_wheel_command_clicked(command: Command):
 	command.apply(%active, %wheel.position)
 	command.scale *= 0.5
 	command.connect("clicked", _on_active_command_clicked.bind(command))
-	commands_changed.emit(player, %active.get_children())
+	commands_changed.emit(%active.get_children())
 
 func _on_active_command_clicked(command: Command):
 	command.queue_free()
-	commands_changed.emit(player, %active.get_children())
+	commands_changed.emit(%active.get_children())
 
 func background_clicked(pos):
 	if %wheel.visible:
@@ -68,3 +68,6 @@ func background_clicked(pos):
 		if camera:
 			pos = get_viewport().canvas_transform.affine_inverse() * pos
 		_show_command_wheel(pos)
+		
+func get_active():
+	return %active.get_children()

core/unit.gd

@@ -2,6 +2,8 @@
 class_name Unit
 extends Composer
 
+signal promoted
+
 @export var sprite: Texture2D:
 	set(val):
 		sprite = val
@@ -68,9 +70,11 @@ func die():
 	queue_free()
 	
 func promote_chief():
-	is_chief = true
+	if not is_chief:
-	if player:
+		is_chief = true
-		add_to_group("chief:" + player.code)
+		if player:
+			add_to_group("chief:" + player.code)
+		promoted.emit()
 
 func set_chief(chief):
 	if chief is Unit and chief.is_chief and chief != self:

main.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=8 format=3 uid="uid://c6omib6txy3qh"]
+[gd_scene load_steps=9 format=3 uid="uid://c6omib6txy3qh"]
 
 [ext_resource type="PackedScene" uid="uid://ck41r2je85sm3" path="res://core/ui/camera.tscn" id="1_7evrt"]
 [ext_resource type="PackedScene" uid="uid://brbtq46uk18gg" path="res://core/battlefield.tscn" id="1_x63ik"]
@@ -7,6 +7,7 @@
 [ext_resource type="PackedScene" uid="uid://b8uik6q4v35o3" path="res://tac/units/factory.tscn" id="2_wnc50"]
 [ext_resource type="PackedScene" uid="uid://xoup4vukp3ni" path="res://core/ui/commands.tscn" id="4_1gkbi"]
 [ext_resource type="PackedScene" uid="uid://dr1e0h27nuam" path="res://tac/commands/delivery.tscn" id="5_fi2mi"]
+[ext_resource type="PackedScene" uid="uid://cmaup0f5ud8vr" path="res://tac/commands/defend.tscn" id="5_fmegp"]
 
 [node name="main" type="Node2D"]
 
@@ -17,7 +18,7 @@
 [node name="commands" parent="." node_paths=PackedStringArray("player", "camera") instance=ExtResource("4_1gkbi")]
 player = NodePath("../world/player1")
 camera = NodePath("../camera")
-available_commands = [ExtResource("5_fi2mi")]
+available_commands = [ExtResource("5_fi2mi"), ExtResource("5_fmegp")]
 
 [node name="world" type="Node2D" parent="."]
 
@@ -29,7 +30,8 @@ code = "p1"
 color = Color(1, 0, 0, 1)
 code = "p2"
 
-[node name="battlefield" parent="world" instance=ExtResource("1_x63ik")]
+[node name="battlefield" parent="world" node_paths=PackedStringArray("commands") instance=ExtResource("1_x63ik")]
+commands = NodePath("../../commands")
 
 [node name="factory1" parent="world/battlefield" node_paths=PackedStringArray("player") instance=ExtResource("2_wnc50")]
 position = Vector2(270, 222)
@@ -43,3 +45,4 @@ player = NodePath("../../player2")
 [connection signal="scrolled" from="inputs" to="camera" method="scroll"]
 [connection signal="zoomed" from="inputs" to="camera" method="change_zoom"]
 [connection signal="commands_changed" from="commands" to="world/battlefield" method="_on_commands_changed"]
+[connection signal="child_entered_tree" from="world/battlefield" to="world/battlefield" method="_on_child_entered_tree"]

project.godot

@@ -34,6 +34,11 @@ _global_script_classes=[{
 "language": &"GDScript",
 "path": "res://core/spawner.gd"
 }, {
+"base": "RefCounted",
+"class": &"Tools",
+"language": &"GDScript",
+"path": "res://core/tools.gd"
+}, {
 "base": "Composer",
 "class": &"Unit",
 "language": &"GDScript",
@@ -50,6 +55,7 @@ _global_script_class_icons={
 "Composer": "",
 "Player": "",
 "Spawner": "",
+"Tools": "",
 "Unit": "",
 "Weapon": ""
 }

tac/assets/commands/defend.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://dgatvtgtb6j8d"
+path="res://.godot/imported/defend.png-0d992a483323ca4da1938cf20130bd2f.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://tac/assets/commands/defend.png"
+dest_files=["res://.godot/imported/defend.png-0d992a483323ca4da1938cf20130bd2f.ctex"]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/bptc_ldr=0
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

tac/commands/defend.tscn

@@ -0,0 +1,11 @@
+[gd_scene load_steps=3 format=3 uid="uid://cmaup0f5ud8vr"]
+
+[ext_resource type="PackedScene" uid="uid://b3l4jfjieucrc" path="res://core/ui/command.tscn" id="1_s822j"]
+[ext_resource type="Texture2D" uid="uid://dgatvtgtb6j8d" path="res://tac/assets/commands/defend.png" id="2_6gky5"]
+
+[node name="command_defend" instance=ExtResource("1_s822j")]
+icon = ExtResource("2_6gky5")
+code = "defend"
+
+[node name="icon" parent="." index="1"]
+texture = ExtResource("2_6gky5")

tac/units/factory.gd

@@ -11,15 +11,8 @@ func _compose():
 	$spawner.player = player
 	super._compose()
 
-func _on_commands_changed(commander, commands):
+func _on_commands_changed(commands):
-	if commander == player:
+	var delivery = Tools.get_nearest(self, commands,
-		var nearest := Vector2(INF, INF)
+		func filter(command): return command.player == player and command.code == "delivery")
-		var distance := INF
+	if delivery:
-		for command in commands:
+		$spawner.delivery = delivery.global_position
-			if command.code == "delivery":
-				var d := position.distance_to(command.position)
-				if d < distance:
-					distance = d
-					nearest = command.position
-		if distance != INF:
-			$spawner.delivery = nearest

tac/units/fighter.gd

@@ -1,5 +1,7 @@
 extends Unit
 
+var current_command := WeakRef.new()
+
 func _compose():
 	$chief.visible = is_chief
 	super._compose()
@@ -7,17 +9,24 @@ func _compose():
 func tick():
 	chief_maintenance()
 	
-	# go to nearest enemy
+	if is_chief:
-	var enemy: Unit = null
+		var command := current_command.get_ref() as Command
-	var closest := INF
+		if command and command.global_position.distance_to(global_position) > 100.0:
-	for unit in get_tree().get_nodes_in_group("unit"):
+			# go near current command
-		if unit is Unit and unit.player != player:
+			move_to(Tools.jitter(command.global_position, 50.0, 100.0))
-			var distance := global_position.distance_to(unit.global_position)
+			return
-			if distance < closest:
+	else:
-				closest = distance
+		var chief = get_chief()
-				enemy = unit
+		if chief and chief.global_position.distance_to(global_position) > 100.0:
+			# go near chief
+			move_to(Tools.jitter(chief.global_position, 50.0, 100.0))
+			return
+	
+	var enemy := Tools.get_nearest(self, get_tree().get_nodes_in_group("unit"), 
+		func filter(unit): return unit is Unit and unit.player != player)
 	if enemy:
-		move_to(enemy.global_position + Vector2.from_angle(randf_range(0.0, PI * 2.0)) * randf_range(100.0, 300.0))
+		# go near current target enemy
+		move_to(Tools.jitter(enemy.global_position, 100.0, 300.0))
 		$turret.set_target(enemy)
 
 func chief_maintenance():
@@ -31,7 +40,15 @@ func chief_maintenance():
 		var chiefs = list_chiefs()
 		# TODO sort by distance, experience and subordinate count
 		if chiefs.size() > 0:
-			chief = chiefs[0]
+			set_chief(chiefs[0])
 		else:
 			promote_chief()
 			_compose()
+
+func _on_commands_changed(commands):
+	if is_chief:
+		var defend := Tools.get_nearest(self, commands, 
+			func filter(command): return command.player == player and command.code == "defend")
+			
+		if defend:
+			current_command = weakref(defend)