Enemy follow Player

newMorningKingdoM

Hi there people, i start the made my basic ai for boss monster this weekend. For boss animations i did use RayCast and it did go smootly, but i got stuck with the boss monster following the player and looking at the player parts.

this is my scenee with only boss animations when it interact with player:

and this is how it looks like when i use 'look_at' to face boss monster to player:

and this is my script for boss monster:

extends KinematicBody
onready var boss1ani = get_node("AnimationPlayer")
var bossyon = Vector3(0,0,0)


enum {
	boss1_walk,
	boss1_atack,
	boss1_idle,
	boss1_slap,
	boss1_floor
}

var boss1_states = boss1_idle
var non_nonstates = [boss1_walk, boss1_atack, boss1_slap, boss1_floor]
var target

func _ready():

	boss1ani.connect("animation_finished",self,"_on_AnimationPlayer_animation_finished")

	
func _on_AnimationPlayer_animation_finished(boss1_animation):

	if boss1_animation == "boss1_walk," and boss1_durum ==boss1_walk,:
		boss1_states = boss1_idle
	if boss1_animation == "boss1_atack" and boss1_durum == boss1_atack:
		boss1_states = boss1_idle
	if boss1_animation == "boss1_slap" and boss1_durum == boss1_slap:
		boss1_states = boss1_idle
	if boss1_animation == "boss1_floor" and boss1_durum == boss1_floor:
		boss1_states = boss1_idle
		
func _physics_process(delta):

	move_and_slide(bossyon,Vector3.UP)
	match boss1_states :
		boss1_walk:
			boss1ani.play("boss1_walk")
		boss1_atack:
			boss1ani.play("boss1_atack")
		boss1_slap:
			boss1ani.play("boss1_slap")
		boss1_floor:
			boss1ani.play("boss1_floor")
		boss1_idle:
			boss1ani.play("boss1_idlee")
		

 #	if $RayCast_boss1.is_colliding():
 #		print($RayCast_boss1.get_collision_point().x)
	if $RayCast_boss1.is_colliding():
		boss1_states = boss1_walk
		if $RayCast_boss1_slap.is_colliding():
			boss1_states = boss1_slap
			bossyon.x = 0
			if $RayCast_boss1_atack.is_colliding():
				boss1_states = boss1_atack
	else:
		boss1_states = boss1_idle
		bossyon.x = 0


	if hedef:
		look_at(target.global_transform.origin, Vector3.UP)








func _on_Area_body_entered(body):
	if body.is_in_group("player2"):
		target = body
		print(body.name + "entered area")


func _on_Area_body_exited(body):
	if body.is_in_group("player2"):
		target = null
		print(body.name + "exited area")

player its in a group name "player2" i have area node on my boss monster and player.

TwistedTwigleg

The look_at function rotates the Basis so that the Z axis faces the target position passed to it. In other words, this means that the boss monster's Z axis arrow (blue) in local gizmo mode (the little cube button in the Godot editor) will be rotated to face whatever position you pass.

So, the first thing you will need to do is make sure that the node you are rotating and the boss face the Z axis. Then, I am assuming you want to rotate on a single plane, likely around the Y (green) axis. To do this, you need to look at the position of the target, but the position of the target you pass to the look_at function needs to have the same Y position as the boss, making it on the same XZ plane. This will make it where the boss only rotates around the Y axis, rather than rotating on the Y and X axis, as seen in the GIF. Something like this should work:

if hedef:
	var target_position = target.global_transform.origin
	target_position.y = global_transform.origin.y
	look_at(target_position, Vector3.UP)

Then, as long as the boss is facing the Z axis, it should rotate only on the Y axis to look at the target. :smile:

newMorningKingdoM

Thank you, well like you said boss's local z axis lookin at player

but this is the result:

TwistedTwigleg

Yup, that is to be expected. The issue is that you are jumping over the player, and normally the look_at function would rotate on the X axis to handle this, rather than rotate 180 degrees on the Y axis. If you want a smooth rotation, you probably want to look into an alternative solution. I've tried to find a way to make LookAt rotate around the Y axis for CCDIK, but alas I was unable to and had to resort to using atan2 instead and manually calculating the rotation offset that needed to be applied.

newMorningKingdoM

Thank you so much for your time dude, well i kind of solve the rotation problem but it feels like cheap solition xd. im not sure if i can do better. i solve it but another problem popup. anyway now it look like this,

i add two RayCast to my main_node ( not the boss_node) so when player intearct with the RayCasts boss_node will rotate on the y axis, i did add RayCasts under the main_node because i dont want them rotate with the boss_node, if they will, then that will be meaningless. this is the code

	if get_node("../boss_donus/RayCast2_arkadaki").is_colliding():
		get_node("../boss_donus/RayCast2_arkadaki").enabled = false
		get_node("../boss_donus/RayCast_ondeki2").enabled = true
		rotation_degrees = Vector3(0,90,0)
	elif get_node("../boss_donus/RayCast_ondeki2").is_colliding():
		get_node("../boss_donus/RayCast_ondeki2").enabled = false
		get_node("../boss_donus/RayCast2_arkadaki").enabled = true
		rotation_degrees = Vector3(0,-90,0)

they triger eachother. But, there is a huge BUT in this. first, when boss_node move (follow the player) this RayCasts also need follow the Boss_node without rotating with the boss_node, and i need the know how to move boss_node, i did write down some thing but its turn out like this,

this is the follow code

	var player_location = get_node("../karakter/karakter_kinematik").global_transform.origin
	var boss_location= get_node("../bossssss1").global_transform.origin
	var direction= player_location - boss_location

	move_and_slide(direction, Vector3.UP)

its follow to fast and even at the y axis, boss need the to be on the floor :)

and lastly, i need a way to stop my player move from other than the z axix(currently only moving on the z axis). Because, when i jump or interact with the enemy object, sometimes player goes to a little left or right, and stop interact with the RayCasts. and as a result, animatins of the enemy objets stops.

like this:

i thoug that i can use collision shapes around the my character till the end of the map but, some objects is bigger then player character so that will not work, is there a way to lock other axis so that my player character only bounce the z axis ?