100 lines
2.6 KiB
GDScript
100 lines
2.6 KiB
GDScript
class_name EnemySwampController
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extends Node
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const SHORT_DISTANCE = 75
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const MEDIUM_DISTANCE = 150
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const LONG_DISTANCE = 300
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const INDIRECT_OFFSET = 75
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const MIN_POSITION = Vector2(300, 30)
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const MAX_POSITION = Vector2(600, 330)
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@export var passage : Passage
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@onready var enemy_update_timer : Timer = $EnemyUpdateTimer
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func create_enemy(enemy_data: EnemyData) -> void:
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var player := _get_random_player()
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if player == null: return
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var enemy_scene : PackedScene = load(enemy_data.enemy_scene)
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var enemy : AbstractEnemyShip = enemy_scene.instantiate()
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passage.add_child(enemy)
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enemy.position = enemy_data.spawn_point
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enemy.enemy_data = enemy_data
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enemy.velocity = enemy.position.direction_to(player.position) * enemy.max_speed
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_update_enemy.call_deferred(enemy)
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func _on_enemy_update_timer_timeout() -> void:
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var enemies := get_tree().get_nodes_in_group("enemies")
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if enemies.is_empty(): return
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var enemy : Node = enemies.pick_random()
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if not enemy is AbstractEnemyShip: return
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_update_enemy(enemy)
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func _update_enemy(enemy: AbstractEnemyShip) -> void:
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var player := _get_random_player()
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if player:
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_target_enemy_to_player(enemy, player)
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else:
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_random_move_enemy(enemy)
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func _target_enemy_to_player(enemy: AbstractEnemyShip, player: PlayerShip) -> void:
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match enemy.weapon_type():
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AbstractWeapon.Type.NONE:
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_random_move_enemy(enemy)
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AbstractWeapon.Type.SHORT_RANGE:
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_update_enemy_target_position(enemy, player, SHORT_DISTANCE)
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AbstractWeapon.Type.MEDIUM_RANGE:
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_update_enemy_target_position(enemy, player, MEDIUM_DISTANCE)
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AbstractWeapon.Type.LONG_RANGE:
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_update_enemy_target_position(enemy, player, LONG_DISTANCE)
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AbstractWeapon.Type.HOMING:
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_update_enemy_target_position(enemy, player, LONG_DISTANCE, INDIRECT_OFFSET)
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AbstractWeapon.Type.MINES:
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_update_enemy_target_position(enemy, player, MEDIUM_DISTANCE, INDIRECT_OFFSET)
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func _update_enemy_target_position(
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enemy: AbstractEnemyShip,
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player: PlayerShip,
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distance: int,
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offset: int = 0
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) -> void:
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var new_position := player.position
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new_position.x += distance
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if offset != 0:
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if randi_range(0, 1) == 0:
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new_position.y += offset
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else:
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new_position.y -= offset
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enemy.controller.target_position = new_position.clamp(MIN_POSITION, MAX_POSITION)
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func _random_move_enemy(enemy: AbstractEnemyShip) -> void:
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enemy.controller.target_position = Vector2(
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randf_range(MIN_POSITION.x, MAX_POSITION.x),
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randf_range(MIN_POSITION.y, MAX_POSITION.y)
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)
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func _get_random_player() -> PlayerShip:
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var players := get_tree().get_nodes_in_group("players")
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if players.is_empty():
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return null
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var player : PlayerShip = players.pick_random()
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return player
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