尝试向游戏对象发射射弹，不会移动！=

Question

我正在制作一款 2D 塔防游戏，希望我的塔能在小兵面前发射预制件。然而，它目前只生成我想要的预制件，但不会移动它。

我的两个脚本：

public class Attacker : MonoBehaviour {

// Public variables
public GameObject ammoPrefab;
public float reloadTime;
public float projectileSpeed;

// Private variables
private Transform target;


// Use this for initialization
void Start () {
}

// Update is called once per frame
void Update () {

}
void OnTriggerEnter(Collider co){
    if (co.gameObject.tag == "Enemy" || co.gameObject.tag == "BlockTower") { 
        Debug.Log("Enemy tag detected");

        if(this.gameObject.tag == "Enemy" && co.gameObject.tag != "Enemy"){
            Debug.Log("This is an Enemy");
            // Insert for Enemey to attack Block Towers.
        }
        if(this.gameObject.tag == "Tower" && co.gameObject.tag != "BlockTower"){
            Debug.Log("This is a Tower");
            Tower Tower = GetComponent<Tower>();
            Tower.CalculateCombatTime(reloadTime, projectileSpeed);
            Transform SendThis = co.transform;
            Tower.SetTarget(SendThis);
        }
    }
}

}

和

public class Tower : MonoBehaviour {
private Transform target;
private float fireSpeed;
private double nextFireTime;
private GameObject bullet;
private Attacker source;

// Use this for initialization
public virtual void Start () {
    source = this.GetComponent<Attacker> ();
}

// Update is called once per frame
public virtual void Update () {

    if (target) {
        Debug.Log("I have a target");
        //if(nextFireTime <= Time.deltaTime)
        FireProjectile ();
    }
}
public void CalculateCombatTime(float time, float speed){
    Debug.Log("Calculate Combat Speed");
    nextFireTime = Time.time + (time * .5);
    fireSpeed = speed;
}
public void SetTarget(Transform position){
    Debug.Log("Set Target");
    target = position;
}
public void FireProjectile(){
    Debug.Log("Shoot Projectile");
    bullet = (GameObject)Instantiate (source.ammoPrefab, transform.position, source.ammoPrefab.transform.rotation);
    float speed = fireSpeed * Time.deltaTime;
    bullet.transform.position = Vector3.MoveTowards (bullet.transform.position, target.position, speed);
}

}

基本上Attacker检测到与它碰撞的物体，然后如果它的标签是Tower，它就会将信息发送给Tower。我的调试显示每个函数都有效，甚至 "Debug.Log("Shoot Projectile");" 也出现了。

但是它没有朝我的目标移动所以我猜 "bullet.transform.position = Vector3.MoveTowards (bullet.transform.position, target.position, step);" 永远不会被执行？

Answer 1

您必须更新项目符号的位置。你只有在创建子弹时才会移动。

尝试做一个子弹列表，使用update函数改变位置

Answer 2

Vector3.MoveTowards只移动一次对象，调用FireProjectile时只是瞬间位移

您需要创建某种带有 Update() 函数的射弹脚本，使其随时间移动。

这是一个例子：

public class Projectile : MonoBehaviour
{
    public Vector3 TargetPosition;

    void Update()
    {
        transform.position = Vector3.MoveTowards(transform.position, TargetPosition, speed * Time.DeltaTime);
    }
}

然后在子弹实例化后立即设置目标：

bullet.GetComponent<Projectile>().TargetPosition = target.position;

希望对您有所帮助。

尝试向游戏对象发射射弹，不会移动！=

Trying to launch a projectile towards a gameobject, doesn't move!=

c#

unity3d

unity3d-2dtools