mergemilitary/Assets/Scripts/Game/Wars/Soldiers/Arrow.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;

public class Arrow : MonoBehaviour
{
    [SerializeField] float mSpeed = 50;
    [SerializeField] GameObject mPfbExplode;
    [SerializeField] AudioClip mShootSound;
    [SerializeField] AudioClip mHitSound;
    [SerializeField] OrbitType mOrbit = OrbitType.Straight; 

    private int mAtkVal;

    private Transform mTrans;
    //for curve
    private float mMoveTime = 0f;
    private Vector3 mInitPos = Vector3.zero;
    private Vector3 mTargetPos = Vector3.zero;
    private Vector3 mDirection = Vector3.zero;

    private WarUnit mTarget = null;
    private bool mIsActive = false;

    private void Awake()
    {
        mTrans = transform;
    }

    private void Update()
    {
        if (!mIsActive)
            return;

        if (mOrbit == OrbitType.Straight)
        {
            mTrans.position += Time.deltaTime * mSpeed * mDirection;
            mMoveTime -= Time.deltaTime;
            if (mMoveTime <= 0)
            {
                Hit();
            }
        }
    }

    public void Init(int pAtkVal, Vector3 pInitPos, Vector3 pTargetPos, WarUnit pTarget)
    {
        mAtkVal = pAtkVal;

        mInitPos = pInitPos;
        mTargetPos = pTargetPos;

        mTrans.position = mInitPos;
        
        Vector3 v = mTargetPos - mInitPos;
        mDirection = v.normalized;
        mMoveTime = v.magnitude / mSpeed;
        mTarget = pTarget;
        AudioManager.Instance.PlaySound(mShootSound, 0.6f);

        if (mOrbit == OrbitType.Straight)
        {
            mTrans.LookAt(mTargetPos);
        }
        else
        {
            Vector3 tHandle = mInitPos + v * 0.5f + Vector3.up * v.magnitude * 0.5f;

            Vector3[] tMovePath = BezierUtils.GetBezierListN2(mInitPos, tHandle, mTargetPos, Mathf.RoundToInt(Mathf.Max(5, v.magnitude)));
            mTrans.DOPath(tMovePath, mMoveTime).SetLookAt(0).SetEase(Ease.Linear).onComplete = Hit;
        }

        mIsActive = true;
    }

    private void Hit()
    {
        if (mPfbExplode != null)
        {
            Instantiate(mPfbExplode, mTargetPos, Quaternion.identity);
        }
        AudioManager.Instance.PlaySound(mHitSound, 0.6f);

        mIsActive = false;
        mTarget.Hurt(mAtkVal);
        Destroy(gameObject);
    }
}

public enum OrbitType
{
    Straight,
    Bezier
}