create ant gathering routine

scenes/items/honeydew.tscn

@@ -8,6 +8,7 @@
 radius = 0.213583
 
 [node name="Honeydew" type="CharacterBody3D"]
+collision_mask = 0
 script = ExtResource("1_6fg3d")
 
 [node name="Sprite3D" type="Sprite3D" parent="."]

scripts/anthill.gd

@@ -19,8 +19,12 @@ func _ready() -> void:
 	super._ready()
 
 
+func space_left() -> int:
+	return max_honeydew - honeydew
+
+
 ## Returns amount of honeydew that did not fit
-func put_honeydew(amount: int) -> int:
+func deposit_honeydew(amount: int) -> int:
 	var new_honeydew_amount := honeydew + amount
 	var leftover: int = 0
 	if new_honeydew_amount > max_honeydew:

scripts/globals/items_manager.gd

@@ -1,6 +1,6 @@
 extends Node
 
-var honeydews: Array[Honeydew] = []
+var honeydews: Dictionary = {}
 
 var honeydew_scene := preload("res://scenes/items/honeydew.tscn")
 
@@ -9,7 +9,7 @@ var honeydew_scene := preload("res://scenes/items/honeydew.tscn")
 
 func _ready() -> void:
 	assert(items_holder != null, "items_holder missing!")
-	spawn_a_bunch(Vector3.ZERO, 5, 0.5)
+	spawn_a_bunch(Vector3.ZERO, 125, 3)
 
 
 func spawn_honeydew(pos: Vector3) -> Honeydew:
@@ -24,5 +24,19 @@ func spawn_a_bunch(pos: Vector3, amount: int, spread: float) -> void:
 		var new_pos := pos
 		new_pos.x += randf_range(-spread, spread)
 		new_pos.z += randf_range(-spread, spread)
-		var new_honeydew :=spawn_honeydew(new_pos)
+		var new_honeydew := spawn_honeydew(new_pos)
-		honeydews.append(new_honeydew)
+		put_honeydew(new_honeydew)
+
+
+func put_honeydew(item: Honeydew) -> void:
+	var item_id := item.get_instance_id()
+	if honeydews.keys().has(item_id):
+		return
+	honeydews[item_id] = item
+
+
+func erase_honeydew(item: Honeydew) -> void:
+	var item_id := item.get_instance_id()
+	if not honeydews.keys().has(item_id):
+		return
+	honeydews.erase(item_id)

scripts/globals/selection_manager.gd

@@ -30,8 +30,8 @@ func _ready() -> void:
 	frustrum_polygon.points = frustrum_polygon_points
 	frustrum_collision_shape.shape = frustrum_polygon
 	rect_panel.visible = false
-	frustrum_area.body_entered.connect(_on_frustrum_area_unit_entered)
+	frustrum_area.body_entered.connect(_on_frustrum_area_body_entered)
-	frustrum_area.body_exited.connect(_on_frustrum_area_unit_exited)
+	frustrum_area.body_exited.connect(_on_frustrum_area_body_exited)
 	frustrum_area.input_ray_pickable = false
 	rect_panel.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	rect_panel.add_theme_stylebox_override("panel", rect_style)
@@ -108,29 +108,30 @@ func _handle_unit_selection() -> void:
 func _set_selection_state(hover: bool) -> void:
 	var rect_abs := selection_rect.abs()
 
-	for unit: Node3D in visible_units.values():
+	for unit: ControlledUnit in visible_units.values():
 		var point := camera.unproject_position(
 				unit.global_position
 				+ (Vector3.UP * UNIT_SELECT_OFFSET)
 		)
-		if unit is ControlledUnit:
+		if hover:
-			var controlled_unit := unit as ControlledUnit
+			unit.set_hovered_rect(rect_abs.has_point(point))
-			if hover:
+		else:
-				controlled_unit.set_hovered_rect(rect_abs.has_point(point))
+			unit.set_selected(rect_abs.has_point(point))
-			else:
+			unit.set_hovered_rect(false)
-				controlled_unit.set_selected(rect_abs.has_point(point))
-				controlled_unit.set_hovered_rect(false)
 
 
-func _on_frustrum_area_unit_entered(unit: Node3D) -> void:
+func _on_frustrum_area_body_entered(unit: Node3D) -> void:
+	if unit is not ControlledUnit:
+		return
+
 	var unit_id := unit.get_instance_id()
 	if visible_units.keys().has(unit_id):
 		return
 	
-	visible_units[unit_id] = unit
+	visible_units[unit_id] = unit as ControlledUnit
 
 
-func _on_frustrum_area_unit_exited(unit: Node3D) -> void:
+func _on_frustrum_area_body_exited(unit: Node3D) -> void:
 	var unit_id := unit.get_instance_id()
 	if not visible_units.keys().has(unit_id):
 		return

scripts/interactable.gd

@@ -4,6 +4,7 @@ class_name Interactable
 const MIN_DRAG_DISTANCE: float = 15
 
 var hovered: bool = false
+var can_interact: bool = true
 var click_position: Vector2 = Vector2.ZERO
 
 @onready var hover_sprite: Sprite3D = $HoverSprite
@@ -15,10 +16,15 @@ func _ready() -> void:
 
 func _process(_delta: float) -> void:
 	hovered = HoveringManager.hovered_node == self
+	if not can_interact:
+		hovered = false
+		return
 	hover_sprite.visible = hovered
 
 
 func _input(event: InputEvent) -> void:
+	if not can_interact:
+		return
 	if event is InputEventMouseButton and hovered:
 		var button_event := event as InputEventMouseButton
 		if button_event.button_index != MOUSE_BUTTON_LEFT:

scripts/items/honeydew.gd

@@ -2,7 +2,24 @@ extends Interactable
 class_name Honeydew
 
 const HEIGHT_OFFSET: float = 0.1
+const DROP_SPREAD: float = 0.1
+
+var carried: bool = false
+
+@onready var collision_shape: CollisionShape3D = $CollisionShape3D
 
 
 func _ready() -> void:
+	assert(collision_shape != null, "collision_shape missing!")
+	super._ready()
 	global_position.y = HEIGHT_OFFSET
+
+
+func set_carried(on: bool) -> void:
+	carried = on
+	can_interact = not carried
+	collision_shape.disabled = carried
+	if (not carried):
+		global_position.x += randf_range(-DROP_SPREAD, DROP_SPREAD)
+		global_position.y = HEIGHT_OFFSET
+		global_position.z += randf_range(-DROP_SPREAD, DROP_SPREAD)

scripts/ui/anthill_info.gd

@@ -46,8 +46,8 @@ func _on_nitwit_button_pressed() -> void:
 
 
 func _on_add_one_button_pressed() -> void:
-	anthill.put_honeydew(1)
+	anthill.deposit_honeydew(1)
 
 
 func _on_add_five_button_pressed() -> void:
-	anthill.put_honeydew(5)
+	anthill.deposit_honeydew(5)

scripts/units/ant_nitwit.gd

@@ -4,15 +4,27 @@ class_name AntNitwit
 enum AntNitwitState {
 	WANDERING,
 	MOVING,
+	GATHERING,
 }
 
 var state: AntNitwitState = AntNitwitState.WANDERING
 
+@onready var gathering: Gathering = $Gathering
+
+
+static func get_cost() -> int:
+	return 5
+
 
 func _ready() -> void:
+	assert(gathering != null, "gathering missing!")
 	super._ready()
 	moving_started.connect(_on_moving_started)
 	moving_ended.connect(_on_moving_ended)
+	nav_agent.navigation_finished.connect(gathering.on_nav_agent_navigation_finished)
+	gathering.anthill = anthill
+	gathering.target_set.connect(_on_gathering_target_set)
+	gathering.stop_gathering.connect(_on_gathering_stop)
 
 
 func _process(delta: float) -> void:
@@ -21,10 +33,13 @@ func _process(delta: float) -> void:
 		state = AntNitwitState.MOVING
 
 	_handle_wandering(delta)
+	_handle_gathering()
 
 
-static func get_cost() -> int:
+func _interact(with: Interactable) -> void:
-	return 5
+	if with is Honeydew:
+		state = AntNitwitState.GATHERING
+		gathering.go_gather(with as Honeydew)
 
 
 func _handle_wandering(delta: float) -> void:
@@ -34,9 +49,29 @@ func _handle_wandering(delta: float) -> void:
 	_wander(delta)
 
 
+func _handle_gathering() -> void:
+	gathering.handle_gathering(state != AntNitwitState.GATHERING)
+
+
 func _on_moving_ended() -> void:
 	state = AntNitwitState.WANDERING
 
 
 func _on_moving_started() -> void:
+	if state == AntNitwitState.GATHERING:
+		gathering.stop_all_gathering()
 	state = AntNitwitState.MOVING
+
+
+func _on_gathering_target_set(pos: Vector3) -> void:
+	if state != AntNitwitState.GATHERING:
+		return
+
+	if pos != Vector3.ZERO:
+		nav_agent.set_target_position(pos)
+	else:
+		nav_agent.set_target_position(anthill.global_position)
+
+
+func _on_gathering_stop() -> void:
+	state = AntNitwitState.WANDERING

scripts/units/components/gathering.gd

@@ -1,16 +1,22 @@
 extends Area3D
 class_name Gathering
 
+signal target_set(pos: Vector3)
+signal stop_gathering
+
 enum GatherState {
 	PICKING_UP,
 	DEPOSITING,
+	STOP,
 }
 
-var items: Dictionary = {}
+var nearby_items: Dictionary = {}
+var carrying_items: Array[Honeydew] = []
 var max_carrying: int = 3
-var carrying: int = 0
+var deposit_leftover: int = 0
-var state: GatherState = GatherState.PICKING_UP
+var state: GatherState = GatherState.STOP
 var target: Honeydew
+var anthill: Anthill
 
 
 func _ready() -> void:
@@ -18,9 +24,136 @@ func _ready() -> void:
 	body_exited.connect(_on_body_exited)
 
 
-func gather(item: Honeydew)->void:
+func _process(_delta: float) -> void:
+	for i in range(carrying_items.size()):
+		var item := carrying_items[i]
+		item.global_position = (
+				global_position
+				+ (Vector3.UP * 0.5)
+				+ (Vector3.UP * 0.1 * i)
+		)
+
+	if target != null:
+		DebugDraw.circle(target.global_position)
+
+
+func go_gather(item: Honeydew) -> void:
+	if anthill.space_left() <= 0:
+		return
+	if carrying_items.size() >= max_carrying:
+		go_deposit()
+		return
 	target = item
 	state = GatherState.PICKING_UP
+	target_set.emit(item.global_position)
+
+
+func go_deposit() -> void:
+	state = GatherState.DEPOSITING
+	target_set.emit(Vector3.ZERO)
+
+
+func handle_gathering(stop: bool) -> void:
+	if stop:
+		state = GatherState.STOP
+
+
+func on_nav_agent_navigation_finished() -> void:
+	if state == GatherState.PICKING_UP and target != null:
+		_pick_up()
+
+	if state == GatherState.DEPOSITING:
+		_deposit()
+
+
+func set_leftover(value: int) -> void:
+	deposit_leftover = value
+
+
+func stop_all_gathering() -> void:
+	state = GatherState.STOP
+	target = null
+
+
+func _pick_up() -> void:
+	if not target.carried:
+		carrying_items.append(target)
+		target.set_carried(true)
+
+		await get_tree().create_timer(0.5).timeout
+		if carrying_items.size() >= max_carrying:
+			go_deposit()
+			return
+
+	var nearest := _find_nearest(nearby_items.values())
+	if nearest != null:
+		go_gather(nearest)
+		return
+
+	go_deposit()
+
+
+func _deposit() -> void:
+	await get_tree().create_timer(0.5).timeout
+	while carrying_items.size() > 0:
+		if state != GatherState.DEPOSITING:
+			return
+
+		if anthill.space_left() <= 0:
+			print('DROP!')
+			_drop_everything()
+			stop_all_gathering()
+			stop_gathering.emit()
+			return
+
+		var item := carrying_items.pop_back() as Honeydew
+		ItemsManager.erase_honeydew(item)
+		_erase_honeydew(item)
+		item.queue_free()
+		anthill.deposit_honeydew(1)
+		await get_tree().create_timer(0.25).timeout
+	
+	state = GatherState.PICKING_UP
+	var nearest := _find_nearest(nearby_items.values())
+	if nearest != null:
+		go_gather(nearest)
+		return
+
+	var nearest_global := _find_nearest(ItemsManager.honeydews.values())
+	if nearest_global != null:
+		go_gather(nearest_global)
+		return
+	
+	stop_all_gathering()
+	stop_gathering.emit()
+
+
+func _drop_everything() -> void:
+	while carrying_items.size() > 0:
+		var item := carrying_items.pop_back() as Honeydew
+		item.set_carried(false)
+		await get_tree().create_timer(0.25).timeout
+
+
+func _find_nearest(items: Array) -> Honeydew:
+	var nearest: Node3D = null
+	var nearest_distance: float = INF
+	for item: Honeydew in items:
+		if item.carried:
+			continue
+		var distance := global_position.distance_to(item.global_position)
+		if distance < nearest_distance:
+			nearest_distance = distance
+			nearest = item
+	return nearest
+
+
+func _erase_honeydew(item: Honeydew) -> void:
+	var item_id := item.get_instance_id()
+	if not nearby_items.keys().has(item_id):
+		return
+	
+	nearby_items.erase(item_id)
 
 
 func _on_body_entered(item: Node3D) -> void:
@@ -28,15 +161,14 @@ func _on_body_entered(item: Node3D) -> void:
 		return
 
 	var item_id := item.get_instance_id()
-	if items.keys().has(item_id):
+	if nearby_items.keys().has(item_id):
 		return
 	
-	items[item_id] = item
+	nearby_items[item_id] = item as Honeydew
 
 
 func _on_body_exited(item: Node3D) -> void:
-	var item_id := item.get_instance_id()
+	if item is not Honeydew:
-	if not items.keys().has(item_id):
 		return
-	
+
-	items.erase(item_id)
+	_erase_honeydew(item as Honeydew)

scripts/units/controlled_unit.gd

@@ -16,6 +16,10 @@ var ground_plane: Plane = Plane(Vector3.UP, 0)
 @onready var selection_sprite: Sprite3D = $SelectionSprite
 
 
+static func get_cost() -> int:
+	return 5
+
+
 func _init() -> void:
 	max_wander_distance = 2
 	min_wander_interval = 0.5
@@ -73,10 +77,6 @@ func set_hovered_rect(on: bool) -> void:
 	hovered_rect = on
 
 
-static func get_cost() -> int:
-	return 5
-
-
 func set_selected(on: bool) -> void:
 	selected = on