how to make simpel swipe trail

Question

signal swipe
var swipestart = null
var minimumdrag = 100

func unhandledinput(event):
if event.isactionpressed("click"):
swipestart = getglobalmouseposition()
if event.isactionreleased("click"):
calculateswipe(getglobalmouseposition())
func _calculateswipe(swipeend):
if swipestart == null:
return
var swipe = swipeend - swipestart
emit_signal("swipe", swipe)

Comments

You asked what you want in the question title, but an image or animation of the desired effect maybe more helpful.

And tell everyone what is happening as a result of your code and why you think it is not working.

Also, tags are lie keywords or subject. Something like "mouse-position" or "draw-on-screen".