Unity background tiling script

Tiler.cs

using UnityEngine;
using System.Collections;

// Must be applied to an empty object wrapping a sprite image
public class Tiler : MonoBehaviour {
	Hashtable tileCollection = new Hashtable(); // X and Y coordinates formatted as x0y0 relative to the starting tile
	GameObject originTile;

	public bool repeatX = true;
	public bool repeatY = false;

	[Tooltip("How far in advance to render a new background piece")]
	public int offsetX = 2;
	public int offsetY = 2;

	[Tooltip("Render each connected tile in reverse on the corresponding axis")]
	public bool reverseScaleX = false;
	public bool reverseScaleY = false;

	// Use this for initialization
	void Awake () {
		if (transform.childCount != 1) {
			Debug.LogError("Repeating backgrounds must have one child element");
			return;
		}

		AddTile(0, 0);
		foreach (Transform child in transform) {
			originTile = child.gameObject;
			originTile.AddComponent("TilerChild");
		}

		// Add all props to the child object inside the tiling script
		TilerChild tileChild = originTile.GetComponent<TilerChild>();
		tileChild.tileApi = this;
		tileChild.repeatX = repeatX;
		tileChild.repeatY = repeatY;
		tileChild.offsetX = offsetX;
		tileChild.offsetY = offsetY;
		tileChild.reverseScaleX = reverseScaleX;
		tileChild.reverseScaleY = reverseScaleY;
	}

	public void AddTile (int x, int y) {
		tileCollection.Add("x" + x + "y" + y, true);
	}

	public bool IsTile (int x, int y) {
		return tileCollection.ContainsKey("x" + x + "y" + y);
	}
}