extends Line2D

var _time := 0.0

func _ready() -> void:
	# Draw the beam in layers instead of a flat line. No bloom is required.
	default_color = Color.TRANSPARENT
	width = 0.0

func _process(delta: float) -> void:
	_time += delta
	if visible:
		queue_redraw()

func _draw() -> void:
	if points.size() < 2:
		return
	var start := points[0]
	var end := points[1]
	var pulse := 0.88 + sin(_time * 65.0) * 0.12
	draw_line(start, end, Color(0.1, 0.65, 1.0, 0.09 * pulse), 16, true)
	draw_line(start, end, Color(0.15, 0.8, 1.0, 0.2 * pulse), 9, true)
	draw_line(start, end, Color(0.3, 0.92, 1.0, 0.7), 3.8, true)
	draw_line(start, end, Color(0.9, 1.0, 1.0, 0.96), 1.4, true)
	for point in [start, end]:
		draw_circle(point, 9 * pulse, Color(0.1, 0.8, 1.0, 0.12))
		draw_circle(point, 4 * pulse, Color(0.35, 0.95, 1.0, 0.6))
		draw_circle(point, 1.8, Color(0.9, 1.0, 1.0))