Repost: Enemy ai jitters wildly upon reaching target position

[wooooooooooooo]

I have an enemy that uses a navigation agent to traverse but upon reaching its target position (in this case, the player) it begins to jitter. It is very distracting and I am curious as how I may remedy this. I have the suspicion it occurs due to the navigation agent being imprecise and attempting to move when its already reach the target position.

Enemy Code

extends CharacterBody2D

var health = 3
var move_speed = 150

var held = false
var dead = false

@onready var player = global_player
@onready var lair = global_position

var direction = null

func _ready():
	add_to_group("pick_up")
	call_deferred("actor_setup")

func _physics_process(_delta):
	if health <= 0:
		dead = true
	
	if !$NavigationAgent2D.is_target_reached() and !dead:
		var new_point_dir = to_local($NavigationAgent2D.get_next_path_position()).normalized()
		velocity = new_point_dir * move_speed
		move_and_slide()
	elif dead:
		$AnimatedSprite2D.play("dead")
		velocity = Vector2(0, 0)
	
	if held:
		position = global_player.item_pos
		#$AnimationPlayer.stop()
		if Input.is_action_just_pressed("action"):
			global_player.item_held = false
			held = false
	else:
		global_position = global_position
		#$AnimationPlayer.play("idle_flash")

func actor_setup():
	await get_tree().physics_frame
	$NavigationAgent2D.target_position = lair

func _on_timer_timeout():
	if $NavigationAgent2D.target_position != round(player.player_pos):
		$NavigationAgent2D.target_position = round(player.player_pos)
	$Timer.start()

[gertkeno]

Can you share more about this? Maybe a video of the effect? Instead of reposting it would be better to “bump” or edit your original topic.

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[wooooooooooooo]

So this recorded in a weird frame rate but the dragon wildly twists and shakes when unable to reach the players position or when it has reached the player position

[wchc]

What did you set in the target_desired_distance property of your NavigationAgent2D?
It seems like you need to increase this value, otherwise your dragon overshoots the target every time, has to turn back and overshoots again, rinse and repeat - hence the jitter.
See the documentation that explains how to fix it, try it out:

NavigationAgent2D

[timesama]

Hey, I had the same problem, and didn’t find the solution of setting target_desired_distance to a higher value working - the jittering persisted. So I did this:

func _on_navigation_agent_2d_navigation_finished() → void:
set_physics_process(false)
await get_tree().create_timer(3).timeout
set_physics_process(true)

I know, it’s not the best, but it worked for me.