World.gd

1	extends Node2D
2
3	const Utils = preload("res://Utils.gd")
4	const Enemy = preload("res://Enemy.tscn")
5	const Health = preload("res://HealPowerUp.tscn")
6	const Speed = preload("res://SpeedPowerUp.tscn")
7	var destination: Vector2
8	var is_destination_set = false
9	var min_items_dict = {
10	"create_enemy": 10,
11	"create_health": 2,
12	"create_speed": 2,
13	}
14
15	func enemy_killed():
16	$CanvasLayer/HUD.score += 1
17
18	func create_enemy():
19	var enemy = Enemy.instance()
20	enemy.position = get_new_item_pos()
21	enemy.add_to_group("enemies")
22	enemy.connect("enemy_killed", self, "enemy_killed")
23	enemy.connect("tree_exiting", self, "create_enemy")
24	$Environment.call_deferred("add_child", enemy)
25
26	func create_health():
27	var health = Health.instance()
28	health.position = get_new_item_pos(1 + randf())
29	health.connect("tree_exiting", self, "create_health")
30	$Environment.call_deferred("add_child", health)
31
32	func create_speed():
33	var speed = Speed.instance()
34	speed.position = get_new_item_pos(1 + randf())
35	speed.connect("tree_exiting", self, "create_speed")
36	$Environment.call_deferred("add_child", speed)
37
38	func _ready() -> void:
39	# create items
40	for creator in min_items_dict:
41	var count = min_items_dict[creator]
42	for n in count:
43	var function = funcref(self, creator)
44	function.call_func()
45
46	func get_new_item_pos(dist_ratio: float = 1.0) -> Vector2:
47	var pos_angle = randi() % 360
48	var unit_vector = Vector2.UP.rotated(pos_angle)
49	var size = get_viewport().get_visible_rect().size
50	var max_side = max(size.x, size.y)
51	var screen_radius = max_side + 10
52	var enemy_spawn_dist = screen_radius * dist_ratio
53	var pos = unit_vector * enemy_spawn_dist + $Player.global_position
54	return pos
55
56	func _input(event: InputEvent) -> void:
57	if $Player.dead:
58	return
59	var width = ProjectSettings.get("display/window/size/width")
60	var height = ProjectSettings.get("display/window/size/height")
61	var mid = Vector2(width / 2.0, height / 2.0)
62	if event is InputEventScreenTouch && event.pressed:
63	var result = event.position + $Player.position - mid
64	set_destination(result)
65	if event is InputEventScreenDrag:
66	var result = event.position + $Player.position - mid
67	set_destination(result)
68	if event is InputEventMouseMotion:
69	var result = event.position + $Player.position - mid
70	set_destination(result)
71
72	func _process(_delta: float) -> void:
73	if Input.is_action_just_pressed("pause"):
74	get_tree().paused = true
75	$CanvasLayer/PauseMenu.show()
76
77	if is_destination_set:
78	$Player.turn_towards(destination)
79	$Destination.visible = true
80	else:
81	$Destination.visible = false
82
83	var enemies = get_tree().get_nodes_in_group("enemies")
84	var filteredEnemies = Utils.filter(funcref(self,"filter_invalid_enemies"), enemies)
85	for e in filteredEnemies:
86	var enemy: Enemy = e
87	enemy.turn_towards($Player.position)
88
89	# remove environment nodes that are too far away
90	# as they are removed, they should replace themselves
91	var screen_radius = get_viewport().get_visible_rect().size.length() / 2 + 10
92	var env_items = $Environment.get_children()
93	Utils.log("env items", env_items.size())
94	for i in env_items:
95	var item: Node2D = i
96	var diff = $Player.global_position - item.global_position
97	var dist = diff.length()
98	var is_too_far = dist > (2.0 * screen_radius)
99	if is_too_far:
100	item.queue_free()
101
102	func set_destination(pos: Vector2) -> void:
103	destination = pos
104	is_destination_set = true
105	$Destination.global_position = pos
106	$Destination.visible = true
107
108	func _on_Destination_body_entered(body: Node) -> void:
109	if body == $Player:
110	is_destination_set = false
111
112	func sort_enemies_ascending_distance(a: Enemy,b: Enemy):
113	var distA = $Player.global_position.distance_to(a.global_position)
114	var distB = $Player.global_position.distance_to(b.global_position)
115	var result = distA < distB
116	return result
117
118	func filter_invalid_enemies(enemy: Enemy) -> bool:
119	if enemy.dead:
120	return false
121	return true
122
123	func _on_ShootTimer_timeout() -> void:
124	if $Player.dead:
125	return
126	var enemies = get_tree().get_nodes_in_group("enemies")
127	for e in enemies:
128	var enemy: Enemy = e
129	enemy.is_targeted = false
130
131	var filteredEnemies = Utils.filter(funcref(self,"filter_invalid_enemies"), enemies)
132	if filteredEnemies.size() > 0:
133	filteredEnemies.sort_custom(self, "sort_enemies_ascending_distance")
134	var closest_enemy: Enemy = filteredEnemies[0]
135	var dist = closest_enemy.global_position.distance_to($Player.global_position)
136	if dist < $Player.shooting_range:
137	closest_enemy.is_targeted = true
138	$Player.shoot_at(closest_enemy.global_position)
139	$PlayerToTarget.points[0] = $Player.global_position
140	$PlayerToTarget.points[1] = closest_enemy.global_position
141
142	func _on_Button_pressed() -> void:
143	get_tree().paused = false
144	$CanvasLayer/PauseMenu.hide()