Double Leap

jotapesings

Hi, I want to make my character double jump. How do I get the button I jump to lock after I press? because I happen to squeeze and jump in the air

TwistedTwigleg

It is late for me right now, which is probably the reason, but I’m not totally sure what you mean by “squeeze and jump” in the air, nor what you mean by locking a button after a press. If you do not mind, can you explain and/or give an example of what you are wanting to achieve? I’m sure I’m missing something.

As for double jumping in general, there are several ways to implement double jumping mechanics depending on your project.One way I’ve written double jumping in 2D side scrolling games is something like this (untested):

extends KinematicBody2D
# Define a class variable for tracking how many times the
# character has jumped
var jump_count = 0
# other variables
var velocity = Vector2(0, 0)
const JUMP_SPEED = -100

func _physics_process(delta):
	if (is_on_floor() == true):
		# When we are on the floor, reset the jump count
		Jump_count = 2
	# If the jump action is pressed...
	if (Input.is_action_just_pressed(“ui_up”)):
		# If there are jumps left in jump count...
		if (jump_count > 0):
			# Jump!
			velocity.y = JUMP_SPEED * delta
			# remove one from jump_count
			jump_count -= 1

That is more or less how I’ve done double jumping in other projects. I can see if I can find the code that handles double jumping in one of the projects if you want. I think it is similar, though there might be some minor differences. For 3D, the idea is generally the same, just how you detect whether the character is on the ground or not can be a little more complicated.

Hopefully this is of some help! (Side note: Welcome to the forums)

jotapesings

@TwistedTwigleg said: It is late for me right now, which is probably the reason, but I’m not totally sure what you mean by “squeeze and jump” in the air, nor what you mean by locking a button after a press. If you do not mind, can you explain and/or give an example of what you are wanting to achieve? I’m sure I’m missing something.

As for double jumping in general, there are several ways to implement double jumping mechanics depending on your project.One way I’ve written double jumping in 2D side scrolling games is something like this (untested):
extends KinematicBody2D
# Define a class variable for tracking how many times the
# character has jumped
var jump_count = 0
# other variables
var velocity = Vector2(0, 0)
const JUMP_SPEED = -100

func _physics_process(delta):
	if (is_on_floor() == true):
		# When we are on the floor, reset the jump count
		Jump_count = 2
	# If the jump action is pressed...
	if (Input.is_action_just_pressed(“ui_up”)):
		# If there are jumps left in jump count...
		if (jump_count > 0):
			# Jump!
			velocity.y = JUMP_SPEED * delta
			# remove one from jump_count
			jump_count -= 1
That is more or less how I’ve done double jumping in other projects. I can see if I can find the code that handles double jumping in one of the projects if you want. I think it is similar, though there might be some minor differences. For 3D, the idea is generally the same, just how you detect whether the character is on the ground or not can be a little more complicated.

Hopefully this is of some help! (Side note: Welcome to the forums)

Got it, it worked, Thanks so much and sorry I forgot to say how I can do this on android too. Because I use TouchScreenButton. The game I'm making will work on both the computer and android.

TwistedTwigleg

Great! I'm glad you got it working! No reason to apologize, I was just a tad confused.

jotapesings

@TwistedTwigleg said: Great! I'm glad you got it working! No reason to apologize, I was just a tad confused.

How do I adapt this for Android with TouchScreenButton?

TwistedTwigleg

@jotapesings said: How do I adapt this for Android with TouchScreenButton?

I am not totally sure, but I think something like this might work:

extends KinematicBody2D
# Define a variable for tracking how many times the
# character has jumped
var jump_count = 0
# A variable for tracking whether a touchscreen jump needs
# to be processed
var perform_touchscreen_jump = false
# other variables
var velocity = Vector2(0, 0)
const JUMP_SPEED = -100

func _ready():
	# Connect the pressed signal to the _on_touchscreen_button_pressed function so
	# the script knows to jump when the button is pressed.
	get_node("TouchScreenButton").connect("pressed", self, "_on_touchscreen_button_pressed")

func _physics_process(delta):
	if (is_on_floor() == true):
		# When we are on the floor, reset the jump count
		Jump_count = 2
	# If the jump action is pressed...
	if (Input.is_action_just_pressed(“ui_up”)):
		# Jump!
		_character_jump()
	# If we need to perform a touch screen jump...
	if (perform_touchscreen_jump == true):
		# Jump!
		_character_jump()
		# Set perform_touchscreen_jump to false so the button has to be
		# pressed again to jump again
		perform_touchscreen_jump = false

func _character_jump():
	# Move jumping code to it's own function for use with
	# both keyboard input and the touch screen button(s).
	#
	# If there are jumps left in jump count...
	if (jump_count > 0):
		# Jump!
		velocity.y = JUMP_SPEED * delta
		# remove one from jump_count
		jump_count -= 1

func _on_touchscreen_button_pressed():
	# Set this to true so we know next _physics_process call to jump
	perform_touchscreen_jump = true

I have not tested the code, but I think it should work. Looking at the documentation for TouchScreenButton, it looks like one of the most important things is knowing whether the button has just been pressed or not.

I think the pressed signal only emits on the first button press, so if that is the case then it can be used to set a variable to tell the player to jump, like in the code above. If it does not, then you'll have to write code to track whether the TouchScreenButton was just pressed, which requires a bit more code.

jotapesings

@TwistedTwigleg said:

@jotapesings said: How do I adapt this for Android with TouchScreenButton?

I am not totally sure, but I think something like this might work:

extends KinematicBody2D
# Define a variable for tracking how many times the
# character has jumped
var jump_count = 0
# A variable for tracking whether a touchscreen jump needs
# to be processed
var perform_touchscreen_jump = false
# other variables
var velocity = Vector2(0, 0)
const JUMP_SPEED = -100

func _ready():
	# Connect the pressed signal to the _on_touchscreen_button_pressed function so
	# the script knows to jump when the button is pressed.
	get_node("TouchScreenButton").connect("pressed", self, "_on_touchscreen_button_pressed")

func _physics_process(delta):
	if (is_on_floor() == true):
		# When we are on the floor, reset the jump count
		Jump_count = 2
	# If the jump action is pressed...
	if (Input.is_action_just_pressed(“ui_up”)):
		# Jump!
		_character_jump()
	# If we need to perform a touch screen jump...
	if (perform_touchscreen_jump == true):
		# Jump!
		_character_jump()
		# Set perform_touchscreen_jump to false so the button has to be
		# pressed again to jump again
		perform_touchscreen_jump = false

func _character_jump():
	# Move jumping code to it's own function for use with
	# both keyboard input and the touch screen button(s).
	#
	# If there are jumps left in jump count...
	if (jump_count > 0):
		# Jump!
		velocity.y = JUMP_SPEED * delta
		# remove one from jump_count
		jump_count -= 1

func _on_touchscreen_button_pressed():
	# Set this to true so we know next _physics_process call to jump
	perform_touchscreen_jump = true

I managed to do it here but he keeps jumping even though he is not on the floor!

#-------------------------------------------# func on_touch_jump_pressed(): touch_jump = true double_leap = true

func _on_touch_jump_released(): touch_jump = false #--------------------------------------------#

This way it is working but even not being on the floor he is jumping.

TwistedTwigleg

I'm a little confused. Is the character jumping all the time and never stops? Are you wanting the character NOT to be able to jump while in the air? Is something else happening?

If the character is jumping in the air and never stops, the issue is most likely that the boolean you are using to check if the touchscreen jump button is pressed is not being set to false when the player has jumped. To debug an issue like this, I would add print("Touch jump: ", touch_jump) and/or print("Double leap: ", double_leap) and see what is happening.

If you do not want the player to be able to jump in mid air, then you need to check if is_on_floor is true before jumping, either in the _character_jump function or before you call _character_jump in _physics_process.

The only thing I'm not sure about is how the character would double jump if they have to be on the ground to jump.

You can limit how many times the character can jump by not resetting jump_count when the player reaches the ground. This would make it where the character can only jump until jump_count is empty, in which case they will not be able to jump until you reset jump_count.

Hopefully this helps!