*

Assets/Scripts/VisibilityZone.cs

@@ -0,0 +1,72 @@
+using UnityEngine;
+using System.Collections;
+
+public class VisibilityZone : Zone {
+	private GameObject obj;
+	private float startupDepth;
+	private Material startupMaterial;
+	private bool startupVisibility;
+	private SpriteRenderer renderer;
+	private bool initialized;
+	private bool hidden;
+	public ZoneVisibilityControl control;
+
+	public Predicate[] visibilityPredicates;
+
+	// Use this for initialization
+	void Start () {
+		Init ();
+	}
+
+	public void Init(){
+		if(!initialized){
+			obj = gameObject;
+			startupDepth = obj.transform.position.z;
+			renderer = obj.GetComponent<SpriteRenderer>();
+			startupMaterial = renderer.sharedMaterial;
+			startupVisibility = obj.activeSelf;
+			initialized = true;
+		}
+	}
+
+	public bool IsInside(Vector2 position){
+		var b = renderer.bounds;
+
+		var r = new Rect(b.min.x, b.min.y, b.max.x - b.min.x, b.max.y - b.min.y);
+		return r.Contains(position);
+		//Vector3 tp = new Vector3(position.x, position.y, b.min.z);
+		//return b.Contains(tp);
+	}
+
+	public void Hide(Material hideMaterial, float hideDepth){
+		hidden = true;
+		var pos = obj.transform.position;
+		pos.z = hideDepth;
+		obj.transform.position = pos;
+		renderer.sharedMaterial = hideMaterial;
+		obj.SetActive(true);
+	}
+	
+	public void Show(){
+		hidden = false;
+		var pos = obj.transform.position;
+		pos.z = startupDepth;
+		obj.transform.position = pos;
+		renderer.sharedMaterial = startupMaterial;
+		obj.SetActive(startupVisibility);
+	}
+	
+	// Update is called once per frame
+	void Update () {
+	    if (control == null) {
+	        return;
+	    }
+		foreach(var p in visibilityPredicates){
+			if(p != null && p.Check(this)){
+				Show ();
+				return;
+			}
+		}
+		Hide (control.hideMaterial, control.hideDepth);
+	}
+}