Additional player speed

Help Physics
1

Hello everyone I would like to create the game of my dreams, and this is my first project, so I’m still new to programming.

Please help me with the code. I tried to replicate the Celeste mechanics where a player can be blown away by the wind as a separate force that acts on the player’s direction. I’m stuck, so any help would be greatly appreciated. Thank you.

extends CharacterBody2D

const JUMP_VELOCITY = -400.0

@export var SPEED = 250.0
@export var boost = 15

var jerk_speed : float

the speed of the player himself

var speed_plaer : Vector2

#additional player speed
var speed_bost : Vector2 = Vector2(20, 8)

var direction : Vector2 = Vector2.ZERO

Get the gravity from the project settings to be synced with RigidBody nodes.

var gravity = ProjectSettings.get_setting(“physics/2d/default_gravity”)

func _physics_process(delta):

direction = Input.get_vector("Left", "Right", "Up", "Down")
if not is_on_floor():
	velocity.y += gravity * delta

# Handle jump.
if Input.is_action_just_pressed("ui_accept") and is_on_floor():
	velocity.y = JUMP_VELOCITY


velocity.x = speed_plaer.x  + speed_bost.x
if direction.x >= 0.5 :
	speed_plaer.x = clamp(min(velocity.x+ boost,  SPEED), -SPEED, SPEED)  
elif direction.x <= -0.5 :
	speed_plaer.x = clamp(max(velocity.x- boost, -SPEED), -SPEED, SPEED)
elif direction.x == 0 and is_on_floor(): 
	speed_plaer.x = move_toward(speed_plaer.x, 0, 90)
elif direction.x == 0 and not is_on_floor():
	speed_plaer.x = move_toward(speed_plaer.x, 0, 5)

move_and_slide()
2

What does this mean? What do you expect your code to do? What is happening instead? With the amount of information you’ve given it will be hard to help you.

3

In this code, an attempt is made to split the speed_player: the character’s own velocity vector, and speed_boost: an additional velocity vector applied to the player. There is also a smooth acceleration of the player. However, the speed_boost does not allow the player to accelerate themselves, and I lose control of the player’s movements as they are carried away in the direction indicated by the speed_boost. I expected the player to resist the speed_boost direction, but nothing happened

4

There’s simply no case that would ever result in a reduced x velocity. speed_player.x would need to get negative in order to resist the speed_bost, but it never does!

velocity.x = speed_plaer.x + speed_bost.x

speed_plaer is not initialized, so implicitly (0, 0). speed_bost is (20, 8). So in the very first frame, your x velocity will be positive 20: the character will move to the right.

As long as there’s no input in x direction, that won’t change!

If there is enough input in x direction, speed_plaer will always increase:

Case 1: “Right” pressed

speed_plaer.x = clamp(min(velocity.x+ boost,  SPEED), -SPEED, SPEED)

clamp(min(20 + 15, 250.0), -250, 250) → clamp(min(35, 250.0), -250, 250) → clamp(35, -250, 250) → 35

Case 2: “Left” pressed

speed_plaer.x = clamp(max(velocity.x- boost, -SPEED), -SPEED, SPEED)

clamp(max(20 - 15, -250), -250, 250) → clamp(max(5, -250), -250, 250) → clamp(5, -250, 250) → 5

So the next frame, velocity.x will be even bigger (either 35 + 20 or 5 + 20).

1 Like
5

Thank you very much