system
March 16, 2021, 12:52am
1
Attention Topic was automatically imported from the old Question2Answer platform.
Asked By Sideswipe0009
I am trying to implement a knockback feature, everything seems right, but an error message pops up for the third line of this code from Player.gd:
func knockback(var enemypos):
velocity.y = min_jump_velocity
if position.x > enemypos:
velocity = 800
elif position.x < enemypos:
velocity = -800
Over in Enemy.gd I have:
func _on_Hitbox_body_entered(body):
if body.name == "Player":
body.knockback(position.x)
Not really sure why I’m getting an invalid operand call here. Still fairly new to Godot and programming in general.
I tried using enemypos.x, but that presents an “Invalid get index ‘x’ (on base: ‘float’)” error.
Any help is appreciated! Thank you.
system
March 16, 2021, 1:03am
2
Reply From: Godont
This is only a guess, but is your velocity variable defined as a Vector2 (i.e. does it contain an x and y component)? If so, you are trying to set a vector of two values equal to a single number (float).
Perhaps try
if position.x > enemypos:
velocity.x = 800
elif position.x < enemypos:
velocity.x = -800
(This will only provide horizontal knockback).
velocity is defined as
var velocity = Vector2()
The full code can be viewed here via Pastebin
edit: the knockback is different as I was trying some various methods
Sideswipe0009 | 2021-03-16 01:08
Right, so that is the problem. velocity is a Vector2 but you are trying to make it a float by making it equal to 800. Did the code change work for you?
Godont | 2021-03-16 14:58
I got it to be error free with this in Player.gd:
func knockback(var enemypos):
velocity.y = min_jump_height
if position.x > enemypos.x:
velocity.x = 2 * Globals.UNIT_SIZE
elif position.x < enemypos.x:
velocity.x = 2 * Globals.UNIT_SIZE
on the Enemy.gd:
func _on_Hitbox_body_entered(body):
if body.name == "Player":
body.knockback(position)
This seems to work for the x axis, but not the y axis, whereas before the y axis was working but not the x axis.
Sideswipe0009 | 2021-03-16 15:14
