godot-shooter / files / actors / Enemy.gd

Enemy.gd

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`b856550a` 2023-10-30 Pavel Safronov	1	extends KinematicBody2D
`f398dcb9` 2023-11-02 Pavel Safronov	2	class_name Enemy
`b856550a` 2023-10-30 Pavel Safronov	3
`cf2013fa` 2023-11-02 Pavel Safronov	4	onready var damage_points = $DamagePoints
`023ec2fb` 2023-11-29 Pavel Safronov	5	onready var navigation_agent: NavigationAgent2D = $NavigationAgent2D
`16938031` 2023-11-17 Pavel Safronov	6	const Utils = preload("res://utils/Utils.gd")
	7	const Explosion = preload("res://effects/Explosion.tscn")
	8	const Smoke = preload("res://effects/Smoke.tscn")
`2b4497bb` 2023-11-27 Pavel Safronov	9	const Damage = preload("res://effects/Damage.tscn")
`ee6296b3` 2023-11-17 Pavel Safronov	10	const Constants = preload("res://utils/Constants.gd")
`0f8974b8` 2023-12-01 Pavel Safronov	11	const Weapons = preload("res://weapons/Weapons.gd")
`b856550a` 2023-10-30 Pavel Safronov	12
`ee6296b3` 2023-11-17 Pavel Safronov	13	export var move_speed = Constants.SPEED * 1.05
`4c85b9c3` 2023-11-29 Pavel Safronov	14	export var turn_rate = 0.03
`e9f8f8f2` 2023-11-01 Pavel Safronov	15	export var health = -1
`3fcb817e` 2023-11-10 Pavel Safronov	16	export var max_health = 100
`1d4ba5a6` 2023-11-02 Pavel Safronov	17	export var is_targeted = false
`52220002` 2023-11-06 Pavel Safronov	18	export var is_invincible = false
`4c85b9c3` 2023-11-29 Pavel Safronov	19	export var target: Vector2
	20	export var follow_target = false
`11ed9f7a` 2023-11-08 Pavel Safronov	21	signal enemy_killed(position)
`b856550a` 2023-10-30 Pavel Safronov	22
`0f8974b8` 2023-12-01 Pavel Safronov	23	var weapon: Weapon
`b856550a` 2023-10-30 Pavel Safronov	24	var velocity = Vector2.ZERO
	25	var dead = false
`8adb41dc` 2023-11-19 Pavel Safronov	26	var health_ratio
	27	var health_percentage
`b856550a` 2023-10-30 Pavel Safronov	28
`e9f8f8f2` 2023-11-01 Pavel Safronov	29	func _ready() -> void:
`0f8974b8` 2023-12-01 Pavel Safronov	30	weapon = Weapons.create_basic_enemy_gun()
`6ad40cea` 2023-12-01 Pavel Safronov	31	navigation_agent.max_speed = move_speed
`023ec2fb` 2023-11-29 Pavel Safronov	32	var _err = navigation_agent.connect("path_changed", self, "path_changed")
	33	_err = navigation_agent.connect("velocity_computed", self, "velocity_computed")
	34	_err = navigation_agent.connect("target_reached", self, "target_reached")
	35
`539576dd` 2023-11-07 Pavel Safronov	36	$AnimationPlayer.play("fade_in")
`cf2013fa` 2023-11-02 Pavel Safronov	37	if health < 0 or health > max_health:
`e9f8f8f2` 2023-11-01 Pavel Safronov	38	health = max_health
`cf2013fa` 2023-11-02 Pavel Safronov	39	else:
	40	var hurt_points = max_health - health
	41	health = max_health
	42	for i in hurt_points:
	43	hurt()
`e9f8f8f2` 2023-11-01 Pavel Safronov	44
`023ec2fb` 2023-11-29 Pavel Safronov	45	func path_changed() -> void:
`638706e1` 2023-11-30 Pavel Safronov	46	pass
`023ec2fb` 2023-11-29 Pavel Safronov	47
	48	func velocity_computed(new_vel: Vector2) -> void:
`1702bad9` 2023-11-30 Pavel Safronov	49	velocity = move_and_slide(new_vel)
`6ad40cea` 2023-12-01 Pavel Safronov	50	global_rotation = velocity.angle() + PI/2.0
`638706e1` 2023-11-30 Pavel Safronov	51	pass
`023ec2fb` 2023-11-29 Pavel Safronov	52
	53	func target_reached() -> void:
`6ad40cea` 2023-12-01 Pavel Safronov	54	var players = get_tree().get_nodes_in_group("player")
	55	var player = players[0]
	56	player.hurt(25)
	57	var explosion = Explosion.instance()
	58	explosion.transform = transform
	59	get_parent().add_child(explosion)
	60	kill()
`638706e1` 2023-11-30 Pavel Safronov	61	pass
`023ec2fb` 2023-11-29 Pavel Safronov	62
`236d1677` 2023-11-01 Pavel Safronov	63	func _process(_delta: float) -> void:
`8adb41dc` 2023-11-19 Pavel Safronov	64	var pb: ProgressBar = $Graphics/Alive/Container/ProgressBar
	65	health_ratio = float(health) / float(max_health)
	66	health_percentage = health_ratio * 100
	67	pb.value = health_percentage
	68	if health_percentage < 20:
	69	pb.modulate = Color.red
	70	elif health_percentage < 60:
	71	pb.modulate = Color.yellow
	72	else:
	73	pb.modulate = Color.blue
`614e7fb1` 2023-10-31 Pavel Safronov	74	$Graphics/Alive/Container.global_rotation = 0
`8adb41dc` 2023-11-19 Pavel Safronov	75	$Graphics/Alive/Sprite/Target.visible = is_targeted
	76	$Graphics/Alive/Sprite/Target.global_rotation = 0
	77	$Graphics/Alive/Sprite/Trails.add_position(global_position)
`0f8974b8` 2023-12-01 Pavel Safronov	78
	79	var players = get_tree().get_nodes_in_group("player")
	80	var player = players[0]
	81	var dist_to_player = global_position.distance_to(player.global_position)
	82
	83	var should_shoot = dist_to_player < weapon.shooting_range
	84	if should_shoot:
	85	var space_state = get_world_2d().direct_space_state
	86	var intersections = space_state.intersect_ray(global_position, player.global_position, [self])
	87	var hits_player = intersections and intersections.collider == player
	88	if hits_player:
	89	weapon.try_shoot(self, player.global_position)
`614e7fb1` 2023-10-31 Pavel Safronov	90
`6ad40cea` 2023-12-01 Pavel Safronov	91	func _physics_process(delta: float) -> void:
`b856550a` 2023-10-30 Pavel Safronov	92	if dead:
	93	return
`023ec2fb` 2023-11-29 Pavel Safronov	94
	95	# navigate to the next position
	96	var current_pos = global_position
	97	var next_pos = navigation_agent.get_next_location()
`1702bad9` 2023-11-30 Pavel Safronov	98	var diff: Vector2 = next_pos - current_pos
	99	var dir = diff.normalized()
`6ad40cea` 2023-12-01 Pavel Safronov	100	var desired_vel = dir * navigation_agent.max_speed
	101	var steering = (desired_vel - velocity) * delta * 4
	102	var new_vel = velocity + steering
	103	velocity = new_vel
	104
`1702bad9` 2023-11-30 Pavel Safronov	105	if navigation_agent.avoidance_enabled:
`6ad40cea` 2023-12-01 Pavel Safronov	106	navigation_agent.set_velocity(velocity)
`1702bad9` 2023-11-30 Pavel Safronov	107	else:
`6ad40cea` 2023-12-01 Pavel Safronov	108	velocity_computed(velocity)
`b856550a` 2023-10-30 Pavel Safronov	109
`023ec2fb` 2023-11-29 Pavel Safronov	110	func set_target(pos: Vector2):
	111	# var to_dir = (pos - global_position).normalized()
	112	# var curr_dir = velocity.normalized()
	113	# var dir_diff = to_dir - curr_dir
	114	# var change = dir_diff * turn_rate * move_speed
	115	# velocity = (velocity + change).normalized() * move_speed
`1702bad9` 2023-11-30 Pavel Safronov	116	# var nav_map = navigation_agent.get_navigation_map()
`638706e1` 2023-11-30 Pavel Safronov	117	# Utils.log("setting target location", pos, "map", nav_map)
`023ec2fb` 2023-11-29 Pavel Safronov	118	navigation_agent.set_target_location(pos)
`e496c548` 2023-11-06 Pavel Safronov	119
`13440f93` 2023-11-27 Pavel Safronov	120	func _ensure_smoke_exists() -> void:
	121	var max_smoke_count = $DamagePoints.get_child_count()
	122	var existing_smoke_count = $DamageObjects.get_child_count()
	123	var expected_smoke_count = ceil(health_ratio * max_smoke_count)
	124	var smoke_to_add_count = expected_smoke_count - existing_smoke_count
	125	for i in smoke_to_add_count:
	126	var smoke = Smoke.instance()
	127	var smoke_pos = get_damage_point_on_body()
	128	smoke.position = smoke_pos
	129	$DamageObjects.add_child(smoke)
	130
`bd0825dd` 2023-11-09 Pavel Safronov	131	func hurt(damage: int = 1):
`52220002` 2023-11-06 Pavel Safronov	132	if dead \|\| is_invincible:
`b856550a` 2023-10-30 Pavel Safronov	133	return
`bd0825dd` 2023-11-09 Pavel Safronov	134	health -= damage
`2b4497bb` 2023-11-27 Pavel Safronov	135	add_damage_label(damage)
`8adb41dc` 2023-11-19 Pavel Safronov	136	# add_child(smoke)
`13440f93` 2023-11-27 Pavel Safronov	137	_ensure_smoke_exists()
`b856550a` 2023-10-30 Pavel Safronov	138	if health <= 0:
	139	kill()
	140
	141	func kill():
`52220002` 2023-11-06 Pavel Safronov	142	if dead \|\| is_invincible:
`b856550a` 2023-10-30 Pavel Safronov	143	return
	144	dead = true
	145	$Graphics/Alive.hide()
`969fd5af` 2023-11-06 Pavel Safronov	146	$CollisionPolygon2D.set_deferred("disabled", true)
`c6faad15` 2023-10-31 Pavel Safronov	147	var explosion = Explosion.instance()
	148	explosion.connect("explosion_done", self, "_on_death_explosion_finished")
	149	$Graphics.add_child(explosion)
`b856550a` 2023-10-30 Pavel Safronov	150	z_index = -1
`11ed9f7a` 2023-11-08 Pavel Safronov	151	emit_signal("enemy_killed", global_position)
`c6faad15` 2023-10-31 Pavel Safronov	152
`2b4497bb` 2023-11-27 Pavel Safronov	153	func add_damage_label(damage_amount: int = 5) -> void:
	154	var damage_label: Damage = Damage.instance()
	155	damage_label.value = -damage_amount
	156	damage_label.position = self.position
	157	get_tree().root.add_child(damage_label)
	158
`fc5de8ee` 2023-11-09 Pavel Safronov	159	func teleport(dest: Vector2) -> void:
`656778ea` 2023-11-28 Pavel Safronov	160	$Graphics/Alive/Sprite/Trails.clear()
`fc5de8ee` 2023-11-09 Pavel Safronov	161	position = dest
	162
`c6faad15` 2023-10-31 Pavel Safronov	163	func _on_death_explosion_finished():
`cf2013fa` 2023-11-02 Pavel Safronov	164	$AnimationPlayer.play("fade_out")
	165
	166	func get_damage_point_on_body() -> Vector2:
	167	var child_count = damage_points.get_child_count()
	168	var random_index = randi() % child_count
	169	var random_child: Position2D = damage_points.get_child(random_index)
	170	return random_child.position
`969fd5af` 2023-11-06 Pavel Safronov	171
	172	func remove_thyself():
	173	queue_free()
`115aa5d1` 2023-11-07 Pavel Safronov	174
	175	func _on_Area2D_body_entered(body: Node) -> void:
	176	var players = get_tree().get_nodes_in_group("player")
`f6120dba` 2023-11-08 Pavel Safronov	177	var player = players[0]
`115aa5d1` 2023-11-07 Pavel Safronov	178	var is_player = body == player
	179	if is_player:
	180	player.hurt(2)
	181	var explosion = Explosion.instance()
	182	explosion.transform = transform
	183	get_parent().add_child(explosion)
	184	kill()