TouhouGD/script/character/hitbox.gd

extends Area3D
class_name Hitbox

@export var pushbox_curve: Curve

@onready var character: Character = (get_owner() as Character)
@onready var status: Status = (%Status as Status)

var radius: float
var pushbox_list: Array[Hitbox] = []


func _ready():
	var collisionShape3D: CollisionShape3D = $CollisionShape3D as CollisionShape3D
	var shape: CylinderShape3D = collisionShape3D.shape as CylinderShape3D
	radius = shape.radius * scale.x

	area_entered.connect(_on_area_entered)
	area_exited.connect(_on_area_exited)


func _process(_delta) -> void:
	var is_skill_running: bool = status.is_skill_running
	if not is_skill_running:
		return
	var speed_dir: Vector2 = status.speed_dir
	if speed_dir.length() == 0:
		return
	var skill_cfg: SkillCfg = status.skill_cfg
	if not skill_cfg:
		return
	if skill_cfg.ignore_push:
		status.speed_down_push_rate = 0
		return
	var speed_down_push_rate: float = 0
	var pos: Vector2 = character.pos2D()
	for pushbox: Hitbox in pushbox_list:
		var target_pos: Vector2 = pushbox.character.pos2D()
		var dir: Vector2 = target_pos - pos
		if speed_dir.dot(dir) <= 0:
			continue
		var dist: float = dir.length()
		if dist == 0:
			continue
		var dist_rate = clamp(dist / (radius + pushbox.radius), 0, 1)
		speed_down_push_rate = max(speed_down_push_rate, pushbox_curve.sample(dist_rate))
	status.speed_down_push_rate = speed_down_push_rate
	return


func _on_area_entered(area: Area3D):
	if area is Hitbox:
		if area.character.team() != character.team():
			pushbox_list.append(area)


func _on_area_exited(area: Area3D):
	if area is Hitbox:
		if area.character.team() != character.team():
			pushbox_list.erase(area)