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Attention | Topic was automatically imported from the old Question2Answer platform. |
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Asked By | Anders Elfgren |
I have a fairly simple platformer script. When I press space I jump, and I’d like to draw a debug line to indicate that this is possible.
To do this, I call move_and_slide, then check is_on_floor. I assumed that this would return true if I have a positive y-velocity (i.e. downwards) and the character stands on something, but it needs to pass a certain threshold. So I have a timer that I set to 0 whenever I’m on the floor and then I set on_floor = true if the timer is < 0.2. Fair enough. And it seems to work from a mechanics PoV. But my debug render doesn’t work.
extends KinematicBody2D
export var GRAVITY = 500
var velocity = Vector2(0,0)
var time_since_on_floor = 1
var on_floor = true
func _ready():
set_physics_process(true)
func _physics_process(delta):
velocity += Vector2(0, GRAVITY * delta)
var right_input = Input.is_action_pressed("right")
var left_input = Input.is_action_pressed("left")
var jump_input = Input.is_action_pressed("jump")
velocity.x *= 0.9
if right_input:
velocity.x =150
if left_input:
velocity.x = -150
move_and_slide(velocity, Vector2(0, -1))
time_since_on_floor += delta
#var test = test_move(get_global_transform(), Vector2(0, 2))
#print(test)
if is_on_floor():
time_since_on_floor = 0
on_floor = time_since_on_floor < 0.2
if on_floor:
velocity.y = 0
if jump_input:
velocity.y = -250
on_floor = false
time_since_on_floor = 1 #hack
if Input.is_action_pressed("exit"):
get_tree().quit()
func _draw():
if time_since_on_floor < 0.5:
draw_line(Vector2(10, 20), Vector2(20, 50), Color(1, 0, 1))
draw_line(Vector2(20, 20), Vector2(10, 50), Color(1, 1, 0))
in _draw, I’ve tried both if checking on_floor and the above, and neither really works. This one “works” if I check if the timer is < 1, but that’s obviously not correct, it needs to match gameplay.
(To be clear - I get the yellow line that I’m always printing but not the purple one).
I assume it’s some kind of threading issue but I thought GDScript was single threaded…?