gistfile1.cs

using UnityEngine;
using System.Collections;

public class interact_boulder : MonoBehaviour {
	
	public GUISkin boxText;
	public bool showBox;
	public float GUIScreenWidth = Screen.width/2;
	public float GUIScreenHeight = Screen.height/2; 
	public float GUIScreenToolWidth = Screen.width - 5;
	public float GUIScreenToolHeight = Screen.height - 5;

	
	void Start () {
		// setting the count to 0 at start of the game
		showBox = false;
	}

	void OnGUI() {

		bool hasNote = player.GetComponent<interact_note>().hasNote;

		GUI.skin = boxText;

		if (showBox == true) {
			GUI.Box(new Rect((GUIScreenWidth - 10),GUIScreenHeight,(Screen.width + 5), GUIScreenToolHeight), "I could use that note.");
		}

		// if hasNote is true and near the boulder object
		if (hasNote == true && showBox == true ) {
			if(GUI.Button(new Rect((GUIScreenWidth + 425),(GUIScreenHeight + 80),100,40), "Give the note")) {
					GUI.Box(new Rect(20, 20, 400, 400), "Inventory - clear"));
					// do whatever code for unlocking a thing and giving the note

				// set hasNote to false
				hasNote = false;
			}

		}

	}


	// exiting the collider, hide the text box

	void OnTriggerExit2D(Collider2D hit)
	{
		print("Collider Exit");
		if(hit.gameObject.tag == "interact")
		{
			print("Left Collider");
			showBox = false;
		}
	}

	// entering collider, show text box


	void OnTriggerEnter2D(Collider2D hit)
	{
		print("Triggered Entered");
		if(hit.gameObject.tag == "interact")
		{
			print("Entered Collider");
			showBox = true;
		}
	}

}