unity3d—demo(2d人物左右移动发射子弹)

人物代码示例：

子弹代码示例：

总结上面代码：

注意点：

人物代码示例：

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

public class PlayerTiao : MonoBehaviour
{
    public float moveSpeed = 10f;

    private float h;
    private SpriteRenderer sr;

    void Start()
    {
        sr = this.GetComponent<SpriteRenderer>();
    }

    void Update()
    {
        h = Input.GetAxis("Horizontal");

        this.transform.Translate(moveSpeed * Time.deltaTime * Vector3.right *  h);

        if(h < 0)
        {
            sr.flipX = true;
        }
        else if(h > 0)
        {
            sr.flipX = false;
        }

        if(Input.GetKeyDown(KeyCode.Space))
        {
            GameObject obj = Instantiate(Resources.Load<GameObject>("BulletObj"),this.transform.position + new Vector3(sr.flipX ? -0.3f : 0.3f,0.5f,0),Quaternion.identity);

            obj.GetComponent<Bullet>().ChangeDir(sr.flipX ? Vector3.left : Vector3.right);
        }
    }
}

子弹代码示例：

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

public class Bullet : MonoBehaviour
{
    public float moveSpeed = 5f;

    private Vector3 nowDir;

    void Start()
    {
        Destroy(this.gameObject, 3f);
    }

    public void ChangeDir(Vector3 dir)
    {
        nowDir = dir;
    }

    void Update()
    {
        this.transform.Translate(moveSpeed * Time.deltaTime * nowDir);
    }
}