How do you convert an object to a transform?

Questions & Answers
1

Hi (and thanks)

I have a game where various objects orbit a planet. The following script is attached to the planet and I would like it to find all objects with tag rather than object name. Is there an elegant way to achieve this?

Currently the errors which appears are:

FindGameObjectWithTag can only be called from the main thread.
Constructors and field initializers will be executed from the loading thread when loading a scene.

Don’t use this function in the constructor or field initializers, instead move initialization code to the Awake or Start function.

UnityException: You are not allowed to call this function when declaring a variable.

Move it to the line after without a variable declaration.

If you are using C# don’t use this function in the constructor or field initializers, Instead move initialization to the Awake or Start function.
Planet…ctor ()
UnityEditor.DockArea:OnGUI()

using UnityEngine;
using System.Collections;
 
public class Planet : MonoBehaviour
{
	//private Transform GameObjectPlayerStart;
	//private Transform GameObjectPlayerGamePlay;
	private GameObject GameObjectPlayerStart = GameObject.FindGameObjectWithTag("GameObjectPlayerStart");
	private GameObject GameObjectPlayerGamePlay = GameObject.FindGameObjectWithTag("GameObjectPlayerGamePlay");
	public float gravitationalForce = 200;
	private Vector3 directionOfGameObjectPlayerStart;
	private Vector3 directionOfGameObjectPlayerGamePlay;
	private Transform b;
	private Transform c;

	void Start ()
	{
		directionOfGameObjectPlayerStart = Vector3.zero;
		directionOfGameObjectPlayerGamePlay = Vector3.zero;
		b = GameObjectPlayerStart.transform;
		c = GameObjectPlayerGamePlay.transform;
	}

	void FixedUpdate ()
	{

		directionOfGameObjectPlayerStart = (transform.position-b.position).normalized;
		GameObjectPlayerStart.GetComponent<Rigidbody2D>().AddForce (directionOfGameObjectPlayerStart*gravitationalForce);  

		directionOfGameObjectPlayerGamePlay = (transform.position-c.position).normalized;
		GameObjectPlayerGamePlay.GetComponent<Rigidbody2D>().AddForce (directionOfGameObjectPlayerGamePlay*gravitationalForce);   
		
	}
}
2

So er… Two hours or so later and I (with a little help from the globalhypermeganet) have come up with a solution.

Posting it for anyone else who is trying to do something similar.

using UnityEngine;
using System.Collections;

public class PlanetGravity : MonoBehaviour 
{
	public float gravitationalForce = 344;

	private Vector3 directionOfGameObjectPlayerStart;
	GameObject[] players;
	
	void Start () {
		players = GameObject.FindGameObjectsWithTag("GameObjectPlayer");
		directionOfGameObjectPlayerStart = Vector3.zero;
	}
	
	void FixedUpdate () 
	{
		foreach(GameObject GameObjectPlayerStart in players) 
				{
				directionOfGameObjectPlayerStart = (transform.position-GameObjectPlayerStart.transform.position).normalized;
				GameObjectPlayerStart.GetComponent<Rigidbody2D>().AddForce (directionOfGameObjectPlayerStart*gravitationalForce);  
				}
	}
}