[Tạo 2D Platformer Game với Godot] Part 13: Destroy the Player

In this part, I will guide you to destroy the Player when the enemy attacks and the Player will run out of health.

Kill the player

This part is similar to the previous part, but in this part, I will add hitbox in enemies and hurtbox in Player.

Hitbox

Add

You add area2D to your enemy Scene and rename it Hitbox.

And set CollisionShape2D and place it where the attack frame is in the attack animation and remember to turn it off.

Then also connect the signal as in the previous section.

Script

extends KinematicBody2D

# Di chuyn
var tocdo = 80
var trongluc = 10
var chuyendong = Vector2()
var huong_dichuyen = 1
# Animation
onready var animation = $AnimatedSprite
var dangtancong = false
# Chi so
var mau = 20
var satthuong = 5

func _physics_process(delta):
    if dangtancong == false:
        chuyendong.x = tocdo * huong_dichuyen
        chuyendong.y += trongluc
        chuyendong = move_and_slide(chuyendong,Vector2.UP)
        animation.play("dichuyen")
        
        if $RayCast2D.is_colliding() == false:
            huong_dichuyen = huong_dichuyen * -1
            scale.x = scale.y * huong_dichuyen
        
        if is_on_wall() and $XacDinhPlayer.is_colliding() == false:
            huong_dichuyen = huong_dichuyen * -1
            scale.x = scale.y * huong_dichuyen
    
    var coll = $XacDinhPlayer.get_collider()
    if coll != null and coll.name == "Player" and dangtancong == false:
        dangtancong = true
        animation.play("tancong")
    if mau <= 0:
        animation.play("chet")


func _on_AnimatedSprite_animation_finished():
    if animation.animation == "tancong":
        dangtancong = false
    if animation.animation == "chet":
        queue_free()


func _on_Hurtbox_area_entered(area):
    if area.get_parent().name == "Player" and area.get_parent().dangtancong == true:
        mau -= area.get_parent().satthuong



func _on_AnimatedSprite_frame_changed():
    if animation.animation == "tancong":
        if animation.frame == 3:
            $Hitbox/CollisionShape2D.disabled = false
        else:
            $Hitbox/CollisionShape2D.disabled = true

The code part, it also adds the same as in the previous part.

I add the satthuong variable, then check if it is an attack frame, turn on the hitbox and vice versa.

Paragraph area.get_parent().dangtancong == true is what I use to determine that the hitbox that collides with the enemy’s hurtbox is not duplicated by itself.

Hurtbox

Add

Create area2D and rename it as Hurtbox in Scene Player

Set the hurtbox’s collisionshape to be the same as the original node’s Collisionshape.

Done then add the signal as before.

Script

extends KinematicBody2D

var tocdo = 200
var trongluc = 10
var chuyendong = Vector2()
var huong_dichuyen = 1
onready var animation = $AnimatedSprite
var dangtancong = false

var mau = 20
var satthuong = 10

func _physics_process(delta):
    
    if !dangtancong:
        huong_dichuyen = Input.get_axis("ui_left","ui_right")
        if huong_dichuyen != 0:
            chuyendong.x = lerp(chuyendong.x,huong_dichuyen * tocdo,0.5)
            animation.play("chay")
            scale.x = scale.y * huong_dichuyen
        else:
            chuyendong.x = lerp(chuyendong.x,0,0.5)
            animation.play("dungyen")

        if is_on_floor():
            if Input.is_action_just_pressed("ui_accept") :
                chuyendong.y = -250
        else:
            animation.play("nhay")
    if Input.is_key_pressed(KEY_J) and is_on_floor():
        dangtancong = true
        chuyendong.x = 0
        animation.play("tancong")
    
    chuyendong.y += trongluc 
    chuyendong.normalized()
    chuyendong = move_and_slide(chuyendong,Vector2.UP)
    
    if mau <= 0:
        set_physics_process(false)
        animation.play("chet")
        $CollisionShape2D.disabled = true
func _on_AnimatedSprite_animation_finished():
    if animation.animation == "tancong":
        dangtancong = false
func _on_AnimatedSprite_frame_changed():
    if animation.animation == "tancong":
        if animation.frame == 3:
            $Hitbox/CollisionShape2D.disabled = false
        else:
            $Hitbox/CollisionShape2D.disabled = true 
        



func _on_Hurtbox_area_entered(area):
    if area.name == "Hitbox" and area.get_parent().dangtancong == true:
        mau -= area.get_parent().satthuong
    pass # Replace with function body.

The code, I think through the previous part and a little bit above that you can understand these codes.

Here, most are the same, but there is only 1 place that you should pay attention to.

Notice the line if mau <= 0: This will be the important line in this Section and in Player. Below that, I will not run the queue_free() function because most Platformer games when the Player dies, they will return to a saved point or return to the menu without deleting anything.

Current set_physics_process(false) is that I disable the physics_process function.

$CollisionShape2D.disabled = true is that I turn off the Player’s CollisionShape2D because when the Player dies without turning it off, it will still determine that the player is alive and continue to attack.

Then you go to AnimatedSprite -> animation dies and turn off Loop otherwise when running dead animation it will be repeated.

This is the final result.

summary

That’s it, the part of destroying enemies and characters is done! See you in the next part.