StackSpawner

/**
 * Spawns a stack of bricks
 */

using UnityEngine;
using System.Collections;

#if UNITY_EDITOR
using UnityEditor;
#endif

public class StackSpawner : MonoBehaviour
{
	public int nBricks = 10;
	public float breakForce = 1000;
	public float breakTorque = 1000;
	public Rigidbody brickPrefab;

	public float Gap = 0f;

	void Start ()
	{
		CreateBricks ();
	}

	public void CreateBricks ()
	{
		Clear ();

		Rigidbody lastBrick = null;
		for (var i = 0; i < nBricks; ++i) {
			var brick = Instantiate (brickPrefab);
			brick.transform.SetParent (transform, false);

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

			var y = i * (2 * cubeSize.y + Gap);

			brick.transform.localPosition = new Vector3 (0, y, 0);

			if (lastBrick) {
				var joint = brick.gameObject.AddComponent<FixedJoint> ();
				joint.connectedBody = lastBrick;
				joint.breakForce = breakForce;
				joint.breakTorque = breakTorque;
			}

			lastBrick = brick;
		}
	}

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

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

		var t = (StackSpawner)target;

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

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