TouhouGD/script/character/hitbox.gd

extends Area3D
class_name Hitbox

@export var pushbox_curve: Curve

@onready var character: Character = (get_owner() as Character)

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


func _process(delta) -> void:
    var speed_dir: Vector2 = character.get_status("speed_dir") as Vector2
    if speed_dir.length() == 0:
        return
    var is_skill_running: bool = character.get_status("is_skill_running") as bool
    if not is_skill_running:
        character.set_status("speed_down_push_rate", 0)
        return
    var skill_cfg: SkillCfg = character.get_status("skill_cfg") as SkillCfg
    if not skill_cfg:
        return
    if skill_cfg.ignore_push:
        character.set_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))
    character.set_status("speed_down_push_rate", speed_down_push_rate)
    return


func on_area_entered(area: Area3D):
    if area is Hitbox:
        pushbox_list.append(area)


func on_area_exited(area: Area3D):
    if area is Hitbox:
        pushbox_list.erase(area)