Question

我正在从以下网站复制项目： http://blog.lessmilk.com/unity-spaceshooter-1/ http://blog.lessmilk.com/unity-spaceshooter-2/

但是，当按下空格键时，我的子弹不会向前移动。以下是我的脚本：

spaceshipScript：

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

public class spaceshipScript : MonoBehaviour {

    public GameObject bullet;

    // Use this for initialization
    void Start () {

    }

    void Update() {
        // Get the rigidbody component
        //var r2d = GetComponent("Rigidbody2D");
        float speed = 10.0f;

        // Move the spaceship when an arrow key is pressed
        if (Input.GetKey (KeyCode.RightArrow))
            transform.position += Vector3.right * speed * Time.deltaTime;
        else if (Input.GetKey (KeyCode.LeftArrow))
            transform.position += Vector3.left * speed * Time.deltaTime;


        //BULLET
        //When spacebar is pressed
        if (Input.GetKeyDown(KeyCode.Space)) {
            Instantiate(bullet, transform.position, Quaternion.identity);
        }
    }
}

bulletScript：

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

public class bulletScript : MonoBehaviour {

    public int speed = 8;

    // Use this for initialization
    void Start () {
        Input.GetKey (KeyCode.UpArrow);
        transform.position += Vector3.right * speed * Time.deltaTime;
    }

    void OnBecomeInvisible() {
        Destroy (gameObject);
    }

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

    }
}

Answer 1

正如他们在评论中告诉你的那样，你正在混合两种不同的方法。如果要使用Time.deltaTime修改项目符号的位置，则需要将该行移至Update（）

但是如果你想按照教程的方法，但不是从下到上射击子弹，你想从左到右射击，你应该只改变轴（并且不要忘记添加一个刚体到了子弹）

// Public variable 
public var speed : int = 6;

// Function called once when the bullet is created
function Start () {
    // Get the rigidbody component
    var r2d = GetComponent("Rigidbody2D");

    // Make the bullet move upward
    r2d.velocity.x = speed;
}

// Function called when the object goes out of the screen
function OnBecameInvisible() {
    // Destroy the bullet 
    Destroy(gameObject);
}

按下空格键时子弹不向前移动（Unity 2D）

1 个答案: