Get closest object;

Unity Engine
1

Hi all, what I want is to get closest object depends on one axis only, here is pic

1467477--80438--$GetDistance.png
1467477--80438--$GetDistance.png512×512 41.2 KB

The way I know how to do this returns me the (d1, d2) values, its ok, but not at this point, how can I calculate closest to point object depend on x1,x2 distance??

2

Assuming position of 1 is V1, 2 is V2 and origin (circle) is Origin…

if ((V1 - Origin).sqrMagnitude > (V2 - Origin).sqrMagnitude)
    //V2 is closer
else
    //V1 is closer

As for removing an axis, just set that axis to 0.

3

There can be many objects, what needs to be changed in this script for example?

GameObject FindClosestEnemy() {
		GameObject[] gos;
		gos = GameObject.FindGameObjectsWithTag("Enemy");
		float distance = Mathf.Infinity;
		Vector3 position = transform.position;
		GameObject closest;
		foreach (GameObject go in gos) {
			Vector3 diff = go.transform.position - position;
			float curDistance = diff.sqrMagnitude;
			if (curDistance < distance) {
				closest = go;
				distance = curDistance;
			}
		}
		return closest;
	}
4

Nothing? Looks good to me.

5

Yea, its ok, but it return closest using d1, d2.
I think I need to get sleep, my brains just wont work :smile:

Here is how it can be done lol

using UnityEngine;
using System.Collections;

public class ClosestEnemy : MonoBehaviour {

	public GameObject closest;
	public Transform cls;

	void Update()
	{
		cls = FindClosestEnemy().transform;
	}


	GameObject FindClosestEnemy() {
		GameObject[] gos;
		gos = GameObject.FindGameObjectsWithTag("Enemy");
		float distance = Mathf.Infinity;
		Vector3 position = transform.position;
		foreach (GameObject go in gos) {
			float curDistance = go.transform.position.x - position.x;
			if (curDistance < distance) {
				closest = go;
				distance = curDistance;
			}
		}
		return closest;
	}
}