extends Node2D
## An expanding ring that fades out, drawn where something exploded.

const SECONDS := 0.3

var radius := 80.0
var _progress := 0.0:
	set(value):
		_progress = value
		queue_redraw()


func _ready() -> void:
	var tween := create_tween()
	tween.tween_property(self, "_progress", 1.0, SECONDS).set_ease(Tween.EASE_OUT).set_trans(Tween.TRANS_CUBIC)
	tween.tween_callback(queue_free)


func _draw() -> void:
	var color := Params.COLOR_ORANGE
	color.a = 1.0 - _progress
	draw_circle(Vector2.ZERO, radius * _progress, color, false, 6.0 * (1.0 - _progress) + 1.0, true)
	color.a *= 0.25
	draw_circle(Vector2.ZERO, radius * _progress, color, true, -1.0, true)