unity射击游戏之射线

游戏中的激光射线很是有趣，来看看unity中如何实现吧。

首先添加lineRender组件，设置lineRender为false，初始状态不可见，然后选择合适Materials

 

下面定义代码PlayerShooter.cs:

 

    public float range = 100f;//射击范围
    public float timeBetweenBullets = 0.15f;//发射子弹的间隔
    float effectsDisplayTime = 0.2f;//子弹消失的时间
    float timer;//计时器

    Ray shootRay; //定义射线
    RaycastHit shootHit;
    LineRenderer gunLine;

    int shootableMask;//定义接受射线的面，mask

 

获取组件

void Awake() {
        shootableMask = LayerMask.GetMask("Shootable");
        gunLine = GetComponent<LineRenderer>();
}

update里面的逻辑

    void Update () {
        timer += Time.deltaTime;
        if (Input.GetButton("Fire1") && timer >= timeBetweenBullets)
        {
            Debug.Log("timer,timeBetweenBullets:" + timer + "," + timeBetweenBullets);
            Shoot();
        }
        if (timer >= timeBetweenBullets * effectsDisplayTime)
        {
            DisableEffects();
        }
    }

//效果消失

 

 public void DisableEffects()
    {
        gunLine.enabled = false;
    }

 

射击函数，此函数主要处理射线射中物体的逻辑

void Shoot() {
        timer = 0f;
        gunLine.enabled = true;
        //gunLine.SetPosition(0, transform.position);

        shootRay.origin = transform.position;
        shootRay.direction = transform.forward;
        // Perform the raycast against gameobjects on the shootable layer and if it hits something...
        if (Physics.Raycast(shootRay, out shootHit, range, shootableMask))
        {
            
            //击中，do something
            // Set the second position of the line renderer to the point the raycast hit.
            gunLine.SetPosition(1, shootHit.point);
        }
        else {

            gunLine.SetPosition(1, shootRay.origin + shootRay.direction * range);
        }
    }