grunk/src/equipment/beam_sfx/spray_sfx.gd

class_name SpraySFX extends AudioStreamPlayer3D
## Plays only as long as `activate` is called every frame.

@export var base_pitch := 1.0
@export var pitch_shape_scale := 0.5

var _active_this_frame := false


func activate() -> void:
	_active_this_frame = true


func set_angle_from_normal(normal: Vector3) -> void:
	var to_player := Player.instance.global_position - global_position
	var angle_to_player := normal.angle_to(to_player)

	# linear pitch shape
	pitch_scale = base_pitch - (2 * angle_to_player / PI) * pitch_shape_scale


func _process(_delta: float) -> void:
	if _active_this_frame:
		if not playing:
			play()
	else:
		stop()

	_active_this_frame = false