Topic was automatically imported from the old Question2Answer platform.
Asked By
Tryst
Hi,
I am fairly new to Godot and I’ve already taken a look at a few tutorials but I am still very new to this.
Right now I am trying to create a little platformer and have the following jumpscript (with limited controls of the jump height):
const GRAVITY = 20
const MIN_JUMP_HEIGHT = -150
const MAX_JUMP_HEIGHT = -550
var timeHeld = 0
var timeForFullJump = 0.1
var motion = Vector2()
func _physics_process(delta):
motion.y += GRAVITY
var friction = false
if is_on_floor():
if Input.is_action_pressed("ui_up"):
timeheld += delta
if timeHeld >= timeForFullJump:
motion.y = MAX_JUMP_HEIGHT
if Input.is_action_just_released("ui_up"):
motion.y = ((MAX_JUMP_HEIGHT - MIN_JUMP_HEIGHT) * (timeHeld /
timeForFullJump) + MIN_JUMP_HEIGHT)
if friction == true:
motion.x = lerp(motion.x, 0, 0.2)
The problem I have with my script is, that there is a very slight delay if I hold down the button till the charackter starts jumping (0.1). Is it possible to get rid of the delay without changing the var timeForFullJump?
I have tried to first use another if loop with “Input.is_action_just_pressed” but it did not work properly.
Is there a better (and easier) way to implement a mechanism for Mario-like jumps?
When I implement variable jump height, I have a jump() method which is called when the jump button is just pressed. In my input processing, I have:
if Input.is_action_just_pressed("jump"):
jump()
The jump() method sets the Player’s y-velocity to the maximum jump velocity:
func jump():
vel.y = -JUMP_VELOCITY
To get variable jumping, I call a jump_cut() method whenever the jump button is released. So, in my input processing, I have:
if Input.is_action_just_released("jump"):
jump_cut()
And the jump_cut() method looks like this:
func jump_cut():
if vel.y < -100:
vel.y = -100
Set up this way, if the player releases the jump button while the jump velocity is still very large, it’s cut down to a mere -100 pixels. This gives variable jumping.
I’d be interested to see someone make your method work though!
I can recommend this method, been using same only with a little bit more of physic calculation, here great GDC talk covering topic
So I made this mario-like jump, it works wonderfully for me. I know it’s old post but other people may find it useful. Just change variables in code to see what works for you.
extends KinematicBody2D
#Jump
export var fallMultiplier = 2
export var lowJumpMultiplier = 10
export var jumpVelocity = 400 #Jump height
#Physics
var velocity = Vector2()
export var gravity = 8
func _physics_process(delta):
#Applying gravity to player
velocity.y += gravity
#Jump Physics
if velocity.y > 0: #Player is falling
velocity += Vector2.UP * (-9.81) * (fallMultiplier) #Falling action is faster than jumping action | Like in mario
elif velocity.y < 0 && Input.is_action_just_released("ui_accept"): #Player is jumping
velocity += Vector2.UP * (-9.81) * (lowJumpMultiplier) #Jump Height depends on how long you will hold key
if is_on_floor():
if Input.is_action_just_pressed("ui_accept"):
velocity = Vector2.UP * jumpVelocity #Normal Jump action
velocity = move_and_slide(velocity, Vector2(0,-1))
It definitely helped me, i made some improvements to it and it worked perfectly
extends KinematicBody2D
#Jump
export var fall_gravity_scale := 150.0
export var low_jump_gravity_scale := 100.0
export var jump_power := 500.0
var jump_released = false
#Physics
var velocity = Vector2()
var earth_gravity = 9.807 # m/s^2
export var gravity_scale := 100.0
var on_floor = false
func _physics_process(delta):
if Input.is_action_just_released("ui_accept"):
jump_released = true
#Applying gravity to player
velocity += Vector2.DOWN * earth_gravity * gravity_scale * delta
#Jump Physics
if velocity.y > 0: #Player is falling
#Falling action is faster than jumping action | Like in mario
#On falling we apply a second gravity to the player
#We apply ((gravity_scale + fall_gravity_scale) * earth_gravity) gravity on the player
velocity += Vector2.DOWN * earth_gravity * fall_gravity_scale * delta
elif velocity.y < 0 && jump_released: #Player is jumping
#Jump Height depends on how long you will hold key
#If we release the jump before reaching the max height
#We apply ((gravity_scale + low_jump_gravity_scale) * earth_gravity) gravity on the player
#It result on a lower jump
velocity += Vector2.DOWN * earth_gravity * low_jump_gravity_scale * delta
if on_floor:
if Input.is_action_just_pressed("ui_accept"):
velocity = Vector2.UP * jump_power #Normal Jump action
jump_released = false
velocity = move_and_slide(velocity, Vector2.UP)
if is_on_floor(): on_floor = true
else: on_floor = false
