武器系统逻辑代码分析

public var missile :GameObject;  
public var noise:int;
public var Owner:GameObject;
public var Flash:GameObject;
public var FlashSize:int = 4;
public var fireRate = 0.1f;
private var nextFireTime = 0.0;
private var timeFlash :int = 0;
public var SoundGun:AudioClip[];
public var ForceShoot :int = 0;
public var NumBullet :int = 0;
public var targetlockontexture:Texture2D;
public var targetlockedtexture:Texture2D;
private var target:GameObject;
private var locked:boolean;
public var distanceLock:float = 200;
public var timetolock:float = 2;
private var timetolockcount:float = 0;
public var targettag:String = "Enemy";
public var aimdirection:float = 0.8f; 
public var Seeker:boolean;


function Start () {
    //初始化时间属性
    nextFireTime = 0.0;
    timetolockcount = Time.time;
}

function Update () {
　　//枪口闪光处理
    if(Flash){
        if(timeFlash>0){
            timeFlash-=1;
        }else{
            Flash.renderer.enabled = false;
            if(Flash.light)
            Flash.light.enabled = false;
        }
    }
    
    if(Seeker){ //是否追踪目标
    if(GameObject.FindGameObjectsWithTag(targettag).Length>0){
        var objs:Array = GameObject.FindGameObjectsWithTag(targettag);
        var distance = int.MaxValue;
        for(var i=0;i<objs.length;i++){
        if(objs[i]){
            var dir    = (objs[i].transform.position - transform.position).normalized;
            var direction = Vector3.Dot(dir,transform.forward); //获取目标的方向
            if(direction >= aimdirection)//如果目标在范围内
            {
                if(timetolockcount + timetolock < Time.time ){ //判断是否到锁定时间
                    if(!locked){ //是否可以锁定
                        var dis = Vector3.Distance(objs[i].transform.position, transform.position); 
                        if(distanceLock > dis){ //是否在锁定距离以内
                            if(distance>dis){
                                distance = dis;
                                target = objs[i];
                            }
                        }
                    }
                }
            }else{
                
            }
           }
        }
        //超出距离解锁
        if(target){
        locked = true;
        var targetdistance = Vector3.Distance(transform.position, target.transform.position);
        if(targetdistance > distanceLock){
            Unlock();
        }
    }

    
   }
   }

}
function DrawTargetLockon(locktexture:Texture2D,aimtarget:Transform,locked:boolean){
    if(locktexture && GameObject.Find("Main Camera")){
        var screenPos : Vector3 = GameObject.Find("Main Camera").gameObject.camera.WorldToScreenPoint(aimtarget.transform.position);
        var distance = Vector3.Distance(transform.position, aimtarget.transform.position);
        GUI.DrawTexture(new Rect(screenPos.x-32,Screen.height - screenPos.y-32,64,64),locktexture);
        GUI.Label(new Rect(screenPos.x+40, Screen.height - screenPos.y,200,30),"Target "+ Mathf.Floor(distance)+"m.");
    }else{
        Debug.Log("Can't Find (Main Camera), you can fix here by changing the (Main Camera) to any camera name you have.");
    }
}
function OnGUI(){
        if(Seeker){
        if(locked){
            if(target){
                DrawTargetLockon(targetlockedtexture,target.transform,true);
            }
        }
        if(GameObject.FindGameObjectsWithTag(targettag).Length>0){
            var objs:Array = GameObject.FindGameObjectsWithTag(targettag);
            for(var i=0;i<objs.length;i++){
                if(objs[i]){
                    var dir    = (objs[i].transform.position - transform.position).normalized;
                    var direction    = Vector3.Dot(dir,transform.forward);
                    if(direction >= aimdirection)
                    {
                        var dis = Vector3.Distance(objs[i].transform.position, transform.position);
                        if(distanceLock > dis){
                            DrawTargetLockon(targetlockontexture,objs[i].transform,true);
                        }
                    }
                }
            }
        }
        }
    
}

function Unlock(){
    // Disable Target
    locked = false;
    timetolockcount = Time.time;
    target = null;
}



function Shoot(){
    
    if (Time.time > nextFireTime + fireRate){
        
        nextFireTime = Time.time;
        if(SoundGun.length>0){
            AudioSource.PlayClipAtPoint(SoundGun[Random.Range(0,SoundGun.length)],transform.position);
        }
    
        for(var i=0;i<NumBullet;i++){
    
            var noisGun = Vector3(Random.Range(-noise,noise),Random.Range(-noise,noise),Random.Range(-noise,noise))/200;
            var direction = transform.TransformDirection(Vector3.forward+noisGun);
            var rotate:Quaternion = this.transform.rotation;
            
            var bullet:GameObject = Instantiate(missile, this.transform.position, rotate);
            if(bullet.GetComponent(MoverMissile)){
                bullet.GetComponent(MoverMissile).target = target;
            }
            if(bullet.GetComponent(Damage)){
                bullet.GetComponent(Damage).Owner = Owner;
            }
            if(bullet.rigidbody){
                bullet.rigidbody.AddForce(direction*ForceShoot);
            }
        }
        Unlock();
    
    
    

        timeFlash = 1;
        if(Flash){
            Flash.renderer.enabled = true;
            if(Flash.light)
            Flash.light.enabled = true;
            Flash.transform.localScale.x = Random.Range(FlashSize/2,FlashSize)/100.0f;
            Flash.transform.localScale.y = Flash.transform.localScale.x;
            Flash.transform.localScale.z = Flash.transform.localScale.x;
        }
        nextFireTime += fireRate;
    }
    
}