monster spawner and moving to the camera direction

scripts/monster_spawnpoint.gd

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+class_name MonsterSpawnpoint
+extends Node3D
+
+# a spawnpoint that can spawn monsters around the center point
+# with a given distance
+# monsters are only spawned, if the player is not looking
+
+@onready var spawn_timer: Timer = Timer.new()
+
+# list that holds all spawnable monsters
+@export var spawnable_monsters: Array[MonsterStats]
+
+# the maximum amount of spawned monsters
+# no monsters will spawn, when this number is reached
+@export var max_monsters: int = 5
+
+# the maximum distance a monster can spawn around the spawnpoint
+@export var max_distance_spawn: float = 10.0
+
+# the maximum lifetime a monster can be in the world
+# a monster is then deleted if the following conditions are met:
+# the monster has exceeded its maximum lifetime and it is not on screen
+# TODO: figure out how to check for the exceeded lifetime and delete
+@export var max_lifetime: float = 60.0 # seconds
+
+@export var spawn_cooldown: float = 3.0 # seconds
+
+# a spawnpoint should keep track of spawned entities
+#var active_monsters: Array[Monster] = []
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	spawn_timer.wait_time = spawn_cooldown
+	spawn_timer.autostart = true
+	spawn_timer.timeout.connect(spawn)
+	add_child(spawn_timer)
+	spawn_timer.start()
+
+func spawn() -> void:
+	if $VisibleOnScreenNotifier3D.is_on_screen():
+		print("Spawnpoint is visible on screen. Not spawning a monster.")
+		return
+		
+	# TODO: Add a check to not spawn enemies X units near the player
+		
+	# get a random position near the spawn point
+	var spawn_point_x = randf_range(-max_distance_spawn, max_distance_spawn)
+	var spawn_point_z = randf_range(-max_distance_spawn, max_distance_spawn)
+	
+	# instantiate a monster .tscn scene
+	var monster_to_spawn = spawnable_monsters[0]
+	
+	# TODO: Replace this with actual instantiation of a walking monster
+	var mesh_instance = MeshInstance3D.new()
+	mesh_instance.mesh = BoxMesh.new()
+	# calculate the position of the monster and add the offset of the spawnpoint itself
+	var monster_position = Vector3(spawn_point_x, 0.2, spawn_point_z)
+	mesh_instance.position = monster_position + position
+		
+	var debug_level_node = get_node("/root/Main/CurrentLevel/DebugLevel")
+	debug_level_node.add_child(mesh_instance)
+	print("spawning mob")
+	
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	var time = Time.get_ticks_msec()
+	$Diamond.rotation.y = sin(time / 800.0) * 2
+	$Diamond.position.y = 1.5 + sin(time / 800.0) * 0.3