using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class Radar : MonoBehaviour 
{
	public static Radar Instance;
	public Transform redPrefeb;
	public Transform radar;
	private List<Transform> allShips = new List<Transform>();
	private List<Transform> allPoints = new List<Transform>();
	private Transform _spaceShip;
	void Awake()
	{
		Instance = this;
	}
	void Start()
	{
		_spaceShip = GameManager.Instance.spaceShip;
	}
	public void InsertOneShip(Transform item)
	{
		allShips.Add(item);
		Transform one = (Transform)Instantiate(redPrefeb)as Transform;
		one.parent = radar;
		allPoints.Add(one);
	}
	void Update()
	{
		for(int i=0;i<allShips.Count;i++)
		{
			if(allShips[i]!=null)
			{
				DrawPoint(allShips[i],allPoints[i]);
			}
			else
			{
				if(allPoints[i]!=null)
				{
					Destroy(allPoints[i].gameObject);
				}
			}
		}
	}
	void DrawPoint(Transform origin,Transform point)
	{
		float bili = 5000;
		float dx = Vector3.Dot(origin.position,_spaceShip.right);
		float dy = Vector3.Dot(origin.position,_spaceShip.forward);
		//Debug.Log(_spaceShip.right+" "+_spaceShip.forward+" "+dx+" "+dy);
		dx/=bili;
		dy/=bili;
		if(dx<-0.2f)dx=-0.2f;
		if(dx>0.2f)dx=0.2f;
		if(dy<-0.2f)dy=-0.2f;
		if(dy>0.2f)dy=0.2f;
		point.localPosition = new Vector3(dx,dy,0);

	}
}