OneShotOneKill/Assets/Script/InGame/Actor/AimArrowController.cs

using UnityEngine;
using UnityEngine.UI;

public class AimArrowController : MonoBehaviour
{
    public Image arrow;
    public Transform projectileParent;

    float m_attackTime, m_attackLifeTime;

    void Start()
    {
        //arrow.enabled = false;
    }

    private void OnEnable()
    {
        var unit = IngameMgr.Ins.Get_CurUnitTData();
        m_attackLifeTime = m_attackTime = unit.f_AttackSpeed;
    }

    public void Set_AttackLifeTime()
    {
        var unit = IngameMgr.Ins.Get_CurUnitTData();
        m_attackLifeTime = unit.f_AttackSpeed - IngameMgr.Ins.Get_SkillValue(eSkillType.AttackSpeedUp);
    }

    private void Update()
    {
        m_attackLifeTime -= Time.deltaTime;
        if (m_attackLifeTime <= 0)
        {
            m_attackLifeTime = m_attackTime;
            Shoot();
        }
    }

    public void OnAimStart(Vector2 screenPos)
    {
        UpdateArrow(screenPos);
    }

    public void OnAimDrag(Vector2 screenPos)
    {
        UpdateArrow(screenPos);
    }

    void Shoot()
    {
        var unit = IngameMgr.Ins.Get_CurUnitTData();
        var attack = unit.n_DefaultAttack + IngameMgr.Ins.Get_SkillValue(eSkillType.AttackUp);
        ProjectileMgr.Ins.Shoot_Projectile(new ProjectileData
        {
            IsPC = true,
            m_Data = table_projectile.Ins.Get_Data(unit.n_ProjectileID),
            tf_Start = arrow.transform,
            Dmg = (int)attack
        });
    }

    void UpdateArrow(Vector2 currentPos)
    {
        Vector2 dir = currentPos - (Vector2)arrow.transform.position;

        float angle = (Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg - 45f) * 7.5f;
        angle = Mathf.Clamp(angle, -80f, 80f);
        arrow.rectTransform.rotation = Quaternion.Euler(0, 0, angle);
    }
}