[Tạo 2D Platformer Game với Godot] Part 10: Player’s Attack

In this part, I will show you how to make the character attack and program the enemy to identify the Player so that they can attack in the next part.

Attack setting

func _physics_process(delta):
    
     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):
        animation.play("tancong")
    
    chuyendong.y += trongluc 
    chuyendong.normalized()
    chuyendong = move_and_slide(chuyendong,Vector2.UP)

On the above code, I have just added 2 basic lines so that you can run the Attack Animation and I guarantee many of you will think it works but it is actually ARE NOT the above code will not be able to work.

If you press the . key J to run the attack animation it won’t be possible because it’s animation currently being used and the animation using it is stand still.

var dangtancong = false
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)

And I will have the above code.

Here I create a new variable var dangtancong= false This variable is used to determine if you are performing an attack

I put all the moves in and jumped in if !dangtancong: is because I will check if I am not attacking, I can move normally, but if I am attacking, the code inside is not running and you will not be able to move or run while attacking.

At the line if Input.is_key_pressed(KEY_J) and is_on_floor(): :

+ I add is_on_floor() is to make sure I can’t attack while jumping.

+ I will set Dangtancong to true to signal that you are performing an anim attack.

+ I lethuyendong.x = 0 is to stop and perform attack anim, you cannot run and attack at the same time.

When I came here, I was still missing one thing, which is to turn the variable Dangtancong about false when it’s over animation attack.

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

I will have one more function and this function is connected to the signal from the AnimatedSprite node

extends KinematicBody2D

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


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

So I will have the entire code as above.

Here is the final result

Summary

In the next part, I will show you how to set up attacks on enemies.