using UnityEngine;
using System.Collections;

/*public class VisibilityZone{


	public VisibilityZone(GameObject src, float overlayDepth){

	}


}*/

public class ZoneVisibilityControl : Predicate {
	#region implemented abstract members of Predicate
	protected override bool CheckInternal ()
	{
		return false;
	}
	protected override bool CheckInternal (object param)
	{
		var z = param as VisibilityZone;
		if(z == null){
			return false;
		}
		return z.IsInside(viewer.transform.position);
	}
	#endregion

	private VisibilityZone[] zones;
	public GameObject viewer;
	private VisibilityZone currentVisible;
	public Material hideMaterial;
	public float hideDepth = -1.0f;
	
	// Use this for initialization
	void Start () {
		zones = FindObjectsOfType<VisibilityZone>();
		foreach(var zone in zones){
			zone.Init();
			zone.Hide(hideMaterial, hideDepth);
		}
	}
	
	void UpateVisibility(){
		foreach(var	zone in zones){
			if(zone.IsInside(viewer.transform.position)){
				if(currentVisible != zone){
					if(currentVisible != null){
						currentVisible.Hide (hideMaterial, hideDepth);
					}

					currentVisible = zone;
					currentVisible.Show();

				}
				return;
			}
		}
		if(currentVisible != null){
			currentVisible.Hide (hideMaterial, hideDepth);
			currentVisible = null;
		}

	}
	// Update is called once per frame
	void Update () {
		//UpateVisibility();
	}


}