More enemy AI added

game/controllers/enemy_swamp_controller.gd

@@ -11,6 +11,15 @@ const HEAVY_ENEMY = preload("res://game/entities/ships/enemies/heavy/heavy_enemy
 
 const ENEMY_TYPES := [ SMALL_ENEMY, MEDIUM_ENEMY, HEAVY_ENEMY ]
 
+const SHORT_DISTANCE = 75
+const MEDIUM_DISTANCE = 150
+const LONG_DISTANCE = 300
+
+const INDIRECT_OFFSET = 75
+
+const MIN_POSITION = Vector2(300, 30)
+const MAX_POSITION = Vector2(600, 330)
+
 
 @onready var enemy_update_timer : Timer = $EnemyUpdateTimer
 
@@ -23,9 +32,7 @@ func create_enemy() -> void:
 	_update_enemy.call_deferred(enemy)
 
 
-func _on_enemy_update_timer_timeout() -> void:
-	enemy_update_timer.start(randi_range(3, 9))
-	
+func _on_enemy_update_timer_timeout() -> void:	
 	var enemies := get_tree().get_nodes_in_group("enemies")
 	if enemies.is_empty(): return
 	
@@ -36,4 +43,55 @@ func _on_enemy_update_timer_timeout() -> void:
 
 
 func _update_enemy(enemy: AbstractEnemyShip) -> void:
-	enemy.controller.target_position = Vector2(randi_range(300, 600), randi_range(30, 330))
+	var players := get_tree().get_nodes_in_group("players")
+	if players.is_empty():
+		_random_move_enemy(enemy)
+		return
+	
+	var player : Node = players.pick_random()
+	if not player is PlayerShip:
+		_random_move_enemy(enemy)
+		return
+	
+	_target_enemy_to_player(enemy, player)
+
+
+func _target_enemy_to_player(enemy: AbstractEnemyShip, player: PlayerShip) -> void:
+	match enemy.weapon_type:
+		AbstractWeapon.Type.NONE:
+			_random_move_enemy(enemy)
+		AbstractWeapon.Type.SHORT_RANGE:
+			_update_enemy_target_position(enemy, player, SHORT_DISTANCE)
+		AbstractWeapon.Type.MEDIUM_RANGE:
+			_update_enemy_target_position(enemy, player, MEDIUM_DISTANCE)
+		AbstractWeapon.Type.LONG_RANGE:
+			_update_enemy_target_position(enemy, player, LONG_DISTANCE)
+		AbstractWeapon.Type.HOMING:
+			_update_enemy_target_position(enemy, player, LONG_DISTANCE, INDIRECT_OFFSET)
+		AbstractWeapon.Type.MINES:
+			_update_enemy_target_position(enemy, player, SHORT_DISTANCE, INDIRECT_OFFSET)
+
+
+func _update_enemy_target_position(
+	enemy: AbstractEnemyShip,
+	player: PlayerShip,
+	distance: int,
+	offset: int = 0
+) -> void:
+	var new_position := player.position
+	new_position.x += distance
+	
+	if offset != 0:
+		if randi_range(0, 1) == 0:
+			new_position.y += offset
+		else:
+			new_position.y -= offset
+	
+	enemy.controller.target_position = new_position.clamp(MIN_POSITION, MAX_POSITION)
+
+
+func _random_move_enemy(enemy: AbstractEnemyShip) -> void:
+	enemy.controller.target_position = Vector2(
+		randf_range(MIN_POSITION.x, MAX_POSITION.x),
+		randf_range(MIN_POSITION.y, MAX_POSITION.y)
+	)

game/controllers/enemy_swamp_controller.tscn

@@ -6,7 +6,8 @@
 script = ExtResource("1_ol8cy")
 
 [node name="EnemyUpdateTimer" type="Timer" parent="."]
-one_shot = true
+process_callback = 0
+wait_time = 0.5
 autostart = true
 
 [connection signal="timeout" from="EnemyUpdateTimer" to="." method="_on_enemy_update_timer_timeout"]