How to add a length limit to line2D?

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1

Godot Version

4.3

Question

I am trying to code a player that moves in a slingshot fashion. I currently have it where if you click on the player and drag, a line is drawn from the player to the mouse but I can’t seem to add a max range to the line without the limit being a square around the character rather than a circle. I’m essentially hoping someone could help explain how to add a max length to a line2D.

I am very new to godot and would really appreciate some advice.
My current code is this:

extends RigidBody2D

@onready var rayCast2D = $RayCast2D
@onready var line = $Line2D
@onready var col = $CollisionShape2D

var aimStart := Vector2.ZERO
var aimFinish := Vector2.ZERO
var pressed := false
var rad = 30
var dis = 0
var dir = 0

func _physics_process(delta: float) → void:
rotation = 0
dis = line.points[0].distance_to(line.points[1])
dir = (aimFinish - aimStart).normalized()

func _on_button_button_down() → void:
pressed = true

func _on_button_button_up() → void:
pressed = false

func _input(event: InputEvent) → void:
if Input.is_action_just_pressed(“left_click”) and pressed == true:
aimStart = col.position
line.points[0] = aimStart
if Input.is_action_pressed(“left_click”) and pressed == true:
aimFinish = get_local_mouse_position()
line.points[1] = aimFinish
if Input.is_action_just_released(“left_click”) and rayCast2D.is_colliding() == true and pressed == true:
linear_velocity = ((aimStart - aimFinish)*3)
line.points[0] = Vector2.ZERO
line.points[1] = Vector2.ZERO

2

Try this:

line.points[1] = aimFinish.limit_length(8.0)

Here, 8.0 is the limit.

1 Like
3

Thank you for the help, I didn’t realize there was a method like that but it works perfectly now!

1 Like