Unity中抛物线实现精准打击

unity中抛物线实现精准打击

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BulletControl : MonoBehaviour {

    public Transform _Target;
       public float _VerticalSpeed;

    const float _Grivaty = -9.81f;
    float _HorizontalSpeed;
       float _TimeCount;

    Vector3 _HorizontalDir;


       void Start () {

        float t1 = -_VerticalSpeed / _Grivaty;
        //float s1 = -_Grivaty * t1 * t1 / 2;
        float s1 = _VerticalSpeed * _VerticalSpeed / (2 * -_Grivaty);

        float top = transform.position.y + s1;

        float s2 = top - _Target.position.y;

        _HorizontalDir = _Target.position - transform.position;
        _HorizontalDir.y = 0;
        float sh = Vector3.Magnitude(_HorizontalDir);

        float t2 = Mathf.Sqrt(2 * s2 / -_Grivaty);
        _HorizontalSpeed = sh / (t1 + t2);

       }
       
       void Update ()
 {
        _TimeCount += Time.deltaTime;
        transform.Translate(_HorizontalDir.normalized * _HorizontalSpeed * Time.deltaTime);
        transform.Translate(Vector3.up * (_VerticalSpeed + _Grivaty * _TimeCount) * Time.deltaTime);
        Debug.DrawLine(transform.position, transform.position+Vector3.up, Color.red, 1000);
       }
}