炮弹轨迹

using UnityEngine;

public class TestSpeed : MonoBehaviour 
{
    public float time = 3;          // 代表从A点出发到B经过的时长
    public Transform pointA;        // 点A
    public Transform pointB;        // 点B
    public float g = -10;           // 重力加速度

    private Vector3 speed;          // 初速度向量
    private Vector3 Gravity;        // 重力向量


    private float dTime = 0;        // 时间线 (一直在增长)

    void Start()
    {
        // 将物体置于A点
        transform.position = pointA.position;

        // 通过一个式子计算初速度
        speed = new Vector3(
            (pointB.position.x - pointA.position.x) / time,
            (pointB.position.y - pointA.position.y) / time - 0.5f * g * time,
            (pointB.position.z - pointA.position.z) / time);

        // 重力初始速度为0
        Gravity = Vector3.zero;
    }

    private float MoveTime = 0;
    void Update()
    {

        MoveTime += Time.deltaTime;
        // 重力模拟
        Gravity.y = g * (dTime += Time.deltaTime);  
        // 模拟位移
        transform.Translate(speed * Time.deltaTime);
        transform.Translate(Gravity * Time.deltaTime);
        if (MoveTime>= time)
        {
            this.gameObject.SetActive(false);
        }
    }
}

using UnityEngine;
using System.Collections;


public class Radar : MonoBehaviour 
{
    public GameObject target;
    public float speed = 10;
    private float distanceToTarget;
    private bool move = true;

    void Start()
    {
        distanceToTarget = Vector3.Distance(this.transform.position, target.transform.position);
        StartCoroutine(Shoot());
    }

    IEnumerator Shoot()
    {
        while (move)
        {
            Vector3 targetPos = target.transform.position;
            //朝向目标  (Z轴朝向目标)
            this.transform.LookAt(targetPos);
            //根据距离衰减 角度
            float angle = Mathf.Min(1, Vector3.Distance(this.transform.position, targetPos) / distanceToTarget) * 45;
            //旋转对应的角度（线性插值一定角度，然后每帧绕X轴旋转）
            this.transform.rotation = this.transform.rotation * Quaternion.Euler(Mathf.Clamp(-angle, -42, 42), 0, 0);
            //当前距离目标点
            float currentDist = Vector3.Distance(this.transform.position, target.transform.position);
            if (currentDist < 0.3f)
            {
                move = false;
            }
            //平移 （朝向Z轴移动）
            this.transform.Translate(Vector3.forward * Mathf.Min(speed * Time.deltaTime, currentDist));
            yield return null;
        }
    }

}

using System;
using System.Collections;
using UnityEngine;

public class Bullet : MonoBehaviour 
{
    public GameObject target;   //要到达的目标
    public float speed = 10;    //速度
    private float distanceToTarget;   //两者之间的距离
    private bool move = true;

    void Start()
    {
        //计算两者之间的距离
        distanceToTarget = Vector3.Distance(this.transform.position, target.transform.position);
        StartCoroutine(StartShoot());
    }

    IEnumerator StartShoot()
    {

        while (move)
        {
            Vector3 targetPos = target.transform.position;

            //让始终它朝着目标
            this.transform.LookAt(targetPos);
            
            //计算弧线中的夹角
            float angle = Mathf.Min(1, Vector3.Distance(this.transform.position, targetPos) / distanceToTarget) * 45;
            this.transform.rotation = this.transform.rotation * Quaternion.Euler(Mathf.Clamp(-angle, -42, 42), 0, 0);
            float currentDist = Vector3.Distance(this.transform.position, target.transform.position);
            if (currentDist < 0.5f)
                move = false;
            this.transform.Translate(Vector3.forward * Mathf.Min(speed * Time.deltaTime, currentDist));
            yield return null;
        }
    }

}