how to limit jumps until a surface is touched

Question

I am making a metroidvania game and i want to limit how many times the player can jump before colliding. my code is bellow:

extends KinematicBody2D

const GRAVITY = 10 # in pixels
const JUMP = 250 # start speed px/s
const SPEED = 200 # px/s

var velocity = Vector2.ZERO # (0,0)

func _ready():
    pass

func _on_Timer_timeout():
    print(str($Timer.wait_time) + " second(s) finished")

func _physics_process(delta):

    # if no keyboard input for left/right then x speed is 0
    velocity.x = 0 
    if(Input.is_action_pressed("right")):
        velocity.x = SPEED
    elif(Input.is_action_pressed("left")):
        velocity.x = -SPEED

    velocity.y += GRAVITY

    if (Input.is_action_just_pressed("jump")):
        velocity.y -= 250

    velocity = move_and_slide(velocity)

Answer 1

Well, you can have for example

var jumps_available := 2

at the top of your code, then simply

# _physics_process
if Input.is_action_just_pressed("jump") and jumps_available > 0:
    velocity.y -= 250
    jumps_available -= 1

along with some kind of reset condition, such as

# _physics_process
if is_on_floor():
    jumps_available = 2

and that should give a rudimentary kind of double-jump functionality.

Comments

will floor count as any surface?

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I don't know, it depends on how you move your character and stuff. If you want to reset on more than just hitting the floor, you can add or change the conditions.

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the code doesn't work when on a tilemap? how should i fix this?

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I don't know, I don't know what your code looks like at the moment. If your tilemap has colliders, then chances are you aren't moving your character in a way that's compatible with is_on_floor.

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do you want me to send my code?