WallSpawner2.cs

/**
 * Spawns a wall along the X and Y axes of the WallSpawner, using cubes of given size and materials
 */

using UnityEngine;
using System.Collections;

#if UNITY_EDITOR
using UnityEditor;
#endif

public class WallSpawner2 : MonoBehaviour
{
	public int Nx = 10;
	public int Ny = 10;
	public Material[] Materials = new Material[0];
	public GameObject prefab;

	private float Gap = 0.1f;

	// Use this for initialization
	void Start ()
	{
		CreateBricks ();
	}

	void Update ()
	{
		// things to try out: rotate the entire wall slowly
		// transform.RotateAround(Vector3.up, 0.01f);
	}

	public void CreateBricks ()
	{
		Clear ();

		for (var j = 0; j < Ny; ++j) {
			var xOffset = (j % 2) == 0 ? .5f : 0;
			for (var i = 0; i < Nx; ++i) {
				var cube = Instantiate (prefab);
				cube.transform.SetParent (transform, false);

				var cubeSize = cube.GetComponent<Collider> ().bounds.extents;

				var x = i * (2 * cubeSize.x + Gap) + Gap + 2 * cubeSize.x * (1 + xOffset);
				var y = j * (2 * cubeSize.y + Gap) + Gap;

				cube.transform.localPosition = new Vector3 (x, y, 0);
				cube.AddComponent<Rigidbody> ();
				cube.AddComponent<BoxCollider> ();

				if (Materials.Length > 0) {
					var m = j % Materials.Length;
					cube.GetComponent<MeshRenderer> ().material = Materials [m];
					m = (m + 1) % Materials.Length;
				}
			}
		}
	}

	public void Clear ()
	{
		for (var i = transform.childCount - 1; i >= 0; --i) {
			DestroyImmediate (transform.GetChild (i).gameObject);
		}
	}
}

#if UNITY_EDITOR
[CustomEditor (typeof(WallSpawner))]
public class WallSpawnerEditor : Editor
{
	public override void OnInspectorGUI ()
	{
		base.OnInspectorGUI ();

		var t = (WallSpawner)target;

		if (GUILayout.Button ("Build")) {
			t.CreateBricks ();
		}

		if (GUILayout.Button ("Clear")) {
			t.Clear ();
		}
	}
}
#endif