attempt to call function "is_in_group" in base "null instance"

Question

here's my code :

extends KinematicBody2D

var speed: = Vector2(300,300)
var direction: = Vector2(0,0)



func _physics_process(delta: float) -> void:
    direction = get_direction()
    var velocity = speed * direction
    velocity = move_and_slide(velocity)
    var object_colliding = get_node("RayCast2D").get_collider()
    if object_colliding.is_in_group("interractable_objects") && Input.is_action_pressed("interract"):
        print("cool")


func get_direction() -> Vector2:
    return Vector2(Input.get_action_strength("right") - Input.get_action_strength("left"),
                    Input.get_action_strength("down") - Input.get_action_strength("up"))

it gives me an error when i launch my game for some reason there's a problem with the isingroup method

Comments

Formatted your code. You can do it by selecting it and then clicking the Code Sample button.

Answer 1

When Godot tells you in base "null instance", it means the object on which you call the function is null. Here, object_colliding is null.

One reason could be that get_node("RayCast2D").get_collider() did not return any collider, which means there is no collision. So you should check for that case before checking the group of the collider.

if object_colliding != null && object_colliding.is_in_group("interractable_objects")

Comments

thanks i'll try that

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the game doesn't crash anymore but it still doesn't print out anything

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New problem then.
According to your code, for the print to happen, you need all of the following conditions to succeed:

• The collider must be detected (non-null)
• The collider must be in the interractable_objects group
• The button bound to the interract action must be pressed

Check which ones are happening.