Targeting nearest enemy !

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Hi there ! Yeah so, after quite 2 days of searching testing etc... I don't figure it out on what to do for targeting my player on the nearest enemy. I tried to pick up code for another question, testing etc... nothing :/ Here's my code, a bit messy sorry ! #pragma strict

 var distance : int;
 var lookAtDistance = 5;
 var target : GameObject;
 var targets : GameObject;
 var damping = 6.0;
 var fireSpeed : float = 15;
 private var waitTillNextFire : float = 0;
 private var canShoot : boolean = false;
 
 var bullet : GameObject;
 var bulletSpawn : GameObject;
 var bulletSound : GameObject;
 var muzzleFlash : GameObject;
 
 var reloading : boolean = false;
 var reloadingAnim : Animation;
 var reloadingAnimString : String;
 var reloadingSound : AudioSource;
 
 var magSize : int = 15;
 var currentMag : int = 15;
 var maxExtraAmmo : int = 250;
 var currentExtraAmmo : int = 250;
 
 var bulletHudTexture : Texture;
 var ammoCountRect : Rect = Rect(25,25,50,25);
 var ammoStartX : int = 100;
 var ammoY : float = 25;
 var ammoSize : Vector2 = Vector2(10,31);
 var ammoSpacing : float = 4;
 var ammoHudTexture : Texture;
 var ammoHudRect : Rect = Rect(25,50,50,25);
 
 function Start ()
 {
     var targets = GameObject.FindGameObjectsWithTag("Enemy");
     Debug.Log("number of enemies found: "+targets.length);
 }
 
 
 function Update () 
 {
     
         if(target != null)
         {
             Aiming();
         }
         else
         {
             canShoot = false;
             GameObject.Find("player").GetComponent(playerMovement).enabled = true;
             Debug.Log("Toast");
         }
 
     
     if(!reloading && Input.GetButtonDown("Reload") && currentMag < magSize && currentExtraAmmo > 0)
     {
         reloading = true;
         reloadingAnim.Play(reloadingAnimString);
         reloadingSound.Play();
     }
     if(!reloading && Input.GetButtonDown("Fire1")  && currentMag == 0 && currentExtraAmmo > 0)
     {
         reloading = true;
         reloadingAnim.Play(reloadingAnimString);
         reloadingSound.Play();
     }
     if(reloading && !reloadingAnim.IsPlaying(reloadingAnimString))
     {
         if(currentExtraAmmo >= magSize - currentMag)
         {
             currentExtraAmmo -= magSize - currentMag;
             currentMag = magSize;
         }
         if(currentExtraAmmo < magSize - currentMag)
         {
             currentMag += currentExtraAmmo;
             currentExtraAmmo = 0;
         }
         reloading = false;
     }
     
     if(currentMag > magSize)
         currentMag = magSize;
     if(currentExtraAmmo > maxExtraAmmo)
         currentExtraAmmo = maxExtraAmmo;
     if(currentMag < 0)
         currentMag = 0;
     if(currentExtraAmmo < 0)
         currentExtraAmmo = 0;
     
     var holdSound : GameObject;
     var holdMuzzleFlash : GameObject;
     
     if(Input.GetButtonDown("Fire1") && currentMag > 0 && !reloading && canShoot == true)
     {
         if(waitTillNextFire <= 0)
         {
             currentMag -= 1;
             if(bullet)
             {
                 Instantiate(bullet, bulletSpawn.transform.position, bulletSpawn.transform.rotation);
             }
             if(bulletSound)
             {
                 holdSound = Instantiate(bulletSound, bulletSpawn.transform.position, bulletSpawn.transform.rotation);
             }
             if(muzzleFlash)
             {
                 holdMuzzleFlash = Instantiate(muzzleFlash, bulletSpawn.transform.position, bulletSpawn.transform.rotation);
             }
             waitTillNextFire = 1;
         }
     }
     waitTillNextFire -= Time.deltaTime * fireSpeed;
     
     if(holdSound)
     {
         holdSound.transform.parent = transform;
     }
     if(holdMuzzleFlash)
     {
         holdMuzzleFlash.transform.parent = transform;
     }
     
 }
 
 function OnGUI ()
 {
 
     if(Input.GetKey(KeyCode.Tab))
     {
         for (var i : int = 1; i <= currentMag; i++)
         {
             GUI.DrawTexture(Rect(ammoStartX + ((i - 1) * (ammoSize.x + ammoSpacing)), ammoY, ammoSize.x, ammoSize.y), bulletHudTexture);
         }
         GUI.Label(ammoCountRect, currentExtraAmmo.ToString());
         GUI.DrawTexture(ammoHudRect, ammoHudTexture);
     }
 
 }
 function LookAt()
 {
         var rotation = Quaternion.LookRotation(target.transform.position - transform.position);
         transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * damping);
 }
 function Aiming()
 {
         for(var enemy : GameObject in targets)
         {
             distance = Vector3.Distance(enemy.transform.position, transform.position);
 
             if(Input.GetKey(KeyCode.Mouse1) && distance < lookAtDistance)
             {
                 target = enemy;
                    Debug.Log("My closest selected enemy so far is: "+target.transform.name);
                 LookAt();
                 canShoot = true;
                 GameObject.Find("player").GetComponent(playerMovement).enabled = false;
                 Debug.Log("Test");
             }
             else
             {
                 canShoot = false;
                 GameObject.Find("player").GetComponent(playerMovement).enabled = true;
                 Debug.Log("Toast");
             }    
            }
 }

Here's also topic that help me a little bit and where I pick up some line of code etc... I know that it's C# on the topic but I tried to rewrite it in javascript.

http://forum.unity3d.com/threads/select-target-from-nearest-enemy.8343/

thanks !

Answer 1

Answer by Jeff-Kesselman · Jun 23, 2014 at 11:05 PM

The distance between any two vectors A and B is the magnitude of the vector A-B

So, loop through all your enemies, subtract your position from their position and compare the magnitudes of the resulting vectors.

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RafaelCN · Jun 23, 2014 at 11:22 PM 0

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You can do the distance between two vectors, supposing that we are working in two dimensions, we can do:

 distance = sqrt((pointA - pointA0)^2 + (pointB - pointB0)^2));

You can implement the calculus above and get the distance between a point A and B.

StriXBeat · Jun 24, 2014 at 09:34 AM 0

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Well, in my script I already had this

 function Ai$$anonymous$$g()
 {
         for(var enemy : GameObject in targets)
         {
             distance = Vector3.Distance(enemy.transform.position, transform.position);
 
             if(Input.Get$$anonymous$$ey($$anonymous$$eyCode.$$anonymous$$ouse1) && distance < lookAtDistance)
             {
                 target = enemy;
                    Debug.Log("$$anonymous$$y closest selected enemy so far is: "+target.transform.name);
                 LookAt();
                 canShoot = true;
                 GameObject.Find("player").GetComponent(player$$anonymous$$ovement).enabled = false;
                 Debug.Log("Test");
             }
             else
             {
                 canShoot = false;
                 GameObject.Find("player").GetComponent(player$$anonymous$$ovement).enabled = true;
                 Debug.Log("Toast");
             }    
            }
 }

It's not that ?

Targeting nearest enemy !

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