Solo Target

Hello I'm really new to video game creation and even more so to using Unity

I would like to create a game with a main character that kills zombies in 2D

The idea is that the target is automatically chosen (the closest enemy)
for this reason someone advised me to use the Trasform function of zombies to locate them

The problem is that I don't know how to aim for just one zombie. Because I imagine that when more than one enemy is going to be in my firing zone it goes to more than one target, but I want it to target only the nearest one.

Knowing that I don't choose or aim, I always aim at the nearest enemy but I don't see how to sort through the zombies

https://www.google.com/search?q=arc...AUIESgC&biw=1440&bih=737#imgrc=Frrq6ZdPPKlWtM:


Here is what I would like to see in the end: several enemy in my firing range but only one who is targeted

 

You should head to the Learn section of the website and go through some of the lessons there to get familiar, if you haven't already. Here's a simple way to find the nearest transform from an array of them

Code (csharp):

1. public Transform GetClosestEnemy()
2. {
3.    Transform[] enemies = GetEnemiesSomeHow(); // I'll assume you have some way of getting all of your enemies. If you don't, consider adding an Enemy script to them and using FindObjectsOfType<Enemy>()
4.    Transform closest = enemies[0]; // We'll guess that the first enemy is the closest
5.    for(int i = 1; i < enemies.Length; i++)
6.    {
7.        float currentDistance = Vector3.Distance(transform.position, closest.position); // the distance from us to our current closest enemy so far
8.        float newDistance = Vector3.Distance(transform.position, enemies[i].position); // the distance from us to the enemy we are checking right now
9.        if(currentDistance > newDistance) // the enemy we are looking at is closer than the last closest one we found
10.            closest = enemies[i];
11.    }
12.    return closest; // this is the enemy with the smallest distance from us to them, so the closest one
13. }

 

I would probably hold a list of all the zombies being in your firing zone. Then each frame i would calculate the distance between those zombies and the player, and chose the one with the smaller distance.

So at the end, your gameObject player would hold a list of zombies. Let's call it zombiesInFireAreaList. Each time a zombie is crossing the fire zone limit (this could be a collider set to isTrigger, allowing you to "detect" new zombie with OnCollisionEnter or something like that) the new zombie would be added to the zombiesInFireAreaList. If for some reason the zombie get out of this area (or if you kill it) you would want to remove him from the zombiesInFireAreaList.

And know something like that (haven't tested the code) :

Code (CSharp):

1. List<GameObject> zombiesInFireAreaList;
2.  
3.     float minDistance;
4.     int closestZombieIndex;
5.     float currentDist;
6.  
7.     private void Update()
8.     {
9.         if (zombiesInFireAreaList.Count > 0)
10.         {
11.             minDistance = float.MaxValue;
12.             closestZombieIndex = 0;
13.  
14.             for (int i = 0; i < zombiesInFireAreaList.Count; i++)
15.             {
16.                 currentDist = Vector3.Distance(transform.position, zombiesInFireAreaList[i].transform.position);
17.  
18.                 if (minDistance > currentDist)
19.                 {
20.                     minDistance = currentDist;
21.                     closestZombieIndex = i;
22.                 }
23.             }
24.  
25.             // here you know you have to shoot the zombie zombiesInFireAreaList[closestZombieIndex]
26.         }
27.     }

 

thank you very much for your help I will try to put in place what you taught me. A big thank you to you