How to move a character at an angle with velocity y

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1

Godot Version

4.3 stable

Question

`so i am trying to make a game where you can only acelerate and rotate if you want to move. but if i rotate i still go up. i know why because i use velocity y but i dont know any other way to add in the grafity.

code:
extends CharacterBody2D

var rocket_speed = -150
var gravity = 350

func get_input():
var up = Input.is_action_pressed(“up”)
var rotate_right = Input.is_action_pressed(“rotate right”)
var rotate_left = Input.is_action_pressed(“rotate left”)

if up:
	velocity.y = rocket_speed
if rotate_right:
	rotation += deg_to_rad(2)
if rotate_left:
	rotation += deg_to_rad(-2)

func _physics_process(delta):
velocity.y += gravity * delta
get_input()
move_and_slide() `

2

You need to apply the direction vector to the velocity.

Take a look at: 2D movement overview — Godot Engine (stable) documentation in English

3

It works now. But the gravity doesn’t work. i think it has something to do with transform.y at velocity and something to do with func _physics_process(delta) under velocity.y because that line doesnt work anymore.

extends CharacterBody2D

var rocket_speed = -150
var gravity = 20

func get_input():
var up = Input.is_action_pressed(“up”)
var rotate_right = Input.is_action_pressed(“rotate right”)
var rotate_left = Input.is_action_pressed(“rotate left”)
velocity = transform.y * Input.get_axis(“down”, “up”) * rocket_speed

if rotate_right:
	rotation += deg_to_rad(2)
if rotate_left:
	rotation += deg_to_rad(-2)

func _physics_process(delta):
velocity.y = velocity.y + gravity
get_input()
move_and_slide()

4

You may want to use move_toward and a acceleration value, and only apply movement if there is a direction pressed.

I’ve never been a fan of seperating into a get_input function since it’s never used anywhere else, it’s just an extra function that drops the delta parameter.

func _physics_process(delta: float) -> void:
    var rotation_input := Input.get_axis("rotate left", "rotate right")
    # using math over if/else and use `delta`
    rotation += deg_to_rad(2) * rotation_input * delta

    var direction_input := transform.y * Input.get_axis("down", "up")
    if direction_input:
        # a good acceleration value may be 4 to 8 times speed, maybe 600
        velocity = velocity.move_toward(direction_input * rocket_speed, acceleration * delta)
    else:
        velocity.y += gravity

    move_and_slide()

Make sure to use proper formatting when pasting code

5

thanks it works now learned a lot of the code, and im going to use the proper formatting in the future.

6

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