My Planet Gravity system not working? C#

Questions & Answers
1

I have a system setup to try and detect when a player is in a specific planets gravity, but for some reason its not working. I will have my code below
I have empty game objects with mesh colliders and rigidbodys on them to emulate the atmosphere and when they enter a certain one, they need to be pulled in.
Here is the code i have: Thank you

using UnityEngine;
using System.Collections;

[RequireComponent (typeof (Rigidbody))]
public class GravityBody : MonoBehaviour {

PlanetGravityEnter planet;

void Awake () 
{
	planet = GameObject.FindGameObjectWithTag("Planet").GetComponentInChildren<PlanetGravityEnter>();
	rigidbody.useGravity = false;
	rigidbody.constraints = RigidbodyConstraints.FreezeRotation;
}

void FixedUpdate () 
{
	planet.Attract (transform);
}

}

using UnityEngine;
using System.Collections;

public class PlanetGravityEnter : MonoBehaviour {

public float gravity = -10f;

public void OnTriggerStay (Collider body)
{
	Attract (transform);
}

public void Attract(Transform body)
{
	Vector3 targetDir = (body.position - transform.position).normalized;
	Vector3 bodyUp = body.up;
	
	body.rotation = Quaternion.FromToRotation (bodyUp, targetDir) * body.rotation;
	body.rigidbody.AddForce (targetDir * gravity);
}

}

using UnityEngine;
using System.Collections;

public class FirstPersonController : MonoBehaviour {

public float mouseSensitivityX = 250f;
public float mouseSensitivityY = 250f;
public float walkSpeed;
public float runSpeed;
public float jumpForce;
public LayerMask groundedMask;

Transform cameraT;
float verticalLookRotation;

Vector3 moveAmount;
Vector3 smoothMoveVelocity;

bool grounded;
bool doubleJump = false;

void Start () 
{
	Screen.showCursor = false;
	cameraT = Camera.main.transform;
}

void Update () 
{
	transform.Rotate (Vector3.up * Input.GetAxis ("Mouse X") * Time.deltaTime * mouseSensitivityX);
	verticalLookRotation += Input.GetAxis("Mouse Y") * Time.deltaTime * mouseSensitivityY;
	verticalLookRotation = Mathf.Clamp (verticalLookRotation, -80, 80);
	cameraT.localEulerAngles = Vector3.left * verticalLookRotation;

	Vector3 moveDir = new Vector3 (Input.GetAxisRaw ("Horizontal"), 0, Input.GetAxisRaw ("Vertical")).normalized;
	Vector3 targetMoveAmount = moveDir * walkSpeed;

	if (Input.GetKey(KeyCode.LeftShift) && grounded)
	{
		targetMoveAmount = moveDir * runSpeed;
	}

	moveAmount = Vector3.SmoothDamp (moveAmount, targetMoveAmount, ref smoothMoveVelocity, 0.15f);

	if (Input.GetButtonDown ("Jump") && (grounded || !doubleJump)){
		{
			rigidbody.AddForce(transform.up * jumpForce);

			if(!doubleJump && !grounded)
				doubleJump = true;
		}
	}

	if (grounded)
		doubleJump = false;

	grounded = false;
	Ray ray = new Ray (transform.position, -transform.up);
	RaycastHit hit;

	if (Physics.Raycast (ray, out hit, 1 + 0.1f,  groundedMask)) 
	{
		grounded = true;
	}
}

void FixedUpdate()
{
	rigidbody.MovePosition (rigidbody.position + transform.TransformDirection (moveAmount) * Time.fixedDeltaTime);
}

}

2

public void Attract(Transform body)
{
Vector3 targetDir = (body.position - transform.position).normalized;
Vector3 bodyUp = body.up;

     body.rotation = Quaternion.FromToRotation (bodyUp, targetDir) * body.rotation;
     body.rigidbody.AddForce (targetDir * gravity);
 }

I think your problem is in your target dir. To correctly generate direction vectors, the calculation is heads - tails or (destination - currentPosition). If you want to attract towards the planet, you must do

Vector3 targetDir = (transform.position - body.position).normalized;