using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Gravitypull : MonoBehaviour {

	//public GameObject gravityWell;
	//public float wellMass;
	public int gravConstPow;

	public 

	GameObject[] planets;


	//public double gravConstant = 6.673f * Mathf.Pow(10,11);


	// Use this for initialization
	void Start () {

		planets = GameObject.FindGameObjectsWithTag ("ground");
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	void FixedUpdate() {

		foreach (GameObject planet in planets) {
			rigidbody2D.AddForce( calcGrav (planet));
		}



	}

	private Vector2 calcGrav(GameObject planet){
		double gravConstant = 6.673f * Mathf.Pow(10,gravConstPow);
		float gravityForce;
		Vector3 distance = planet.transform.position - transform.position;
		float r12 = distance.magnitude;
		distance /= r12;
		//Debug.Log ("distance: " + distance);

		gravityForce = (rigidbody2D.mass * planet.rigidbody2D.mass * (float)gravConstant) / (r12 * r12);

		//Debug.Log ("player mass: " + rigidbody.mass);
		//Debug.Log ("well mass: " + wellMass);
		//Debug.Log ("grav Const: " + (float)gravConstant);
		//Debug.Log ("r12: " + r12);

		//Debug.Log ("gravityForce: " + gravityForce);


		Vector2 distance2D = new Vector2 (distance.x, distance.y);
		Debug.Log ("force added: " + (distance2D * gravityForce));
		return (distance2D * gravityForce);


	}
}