Yield WaitForSeconds problem

Questions & Answers
1

I am creating a gun script and the yield WaitForSeconds(fireRate) is not starting up. See if you can spot a problem with it.

using UnityEngine;
using System.Collections;

public class Gun : MonoBehaviour {
#region Variables and Script Settings
	public string gunName;							//The name of the Gun
	public GameObject projectilePrefab;				//The prefab of the bullet

	private Transform _myTransform;		            //The location of the weapon
	
	public Texture2D HUD_Icon;

	public float projectileSpeed = 500;
	public float fireRate = .1f;

	private bool _allowFire;

	private Component _projectileRigidbody;
	
	public bool debug = false;
#endregion

	void Start() {
		_myTransform = transform;
		_projectileRigidbody = projectilePrefab.GetComponent<Rigidbody>();

		if(_projectileRigidbody = null)
			projectilePrefab.AddComponent<Rigidbody>();

		_allowFire = true;
	}

	// Update is called once per frame
	void Update () {
		if(Input.GetButton("Trigger1")) {
			if(_allowFire) {
				LaunchProjectile();
			}
		}
	}

	void OnGUI() {
		DisplayHUDWeaponTexture();
	}

	public void LaunchProjectile() {
		_allowFire = false;
		Vector3 startPosition;

		startPosition = _myTransform.FindChild("Barrel").transform.position;

		GameObject projectile = GameObject.Instantiate(projectilePrefab, startPosition, Quaternion.identity) as GameObject;
		projectile.rigidbody.useGravity = false;
		projectile.rigidbody.AddForce(projectile.transform.forward * projectileSpeed);

		FireRateLimiter();
	}

	public IEnumerator FireRateLimiter() {
		yield return new WaitForSeconds(fireRate);
		_allowFire = true;
	}

	public void DisplayHUDWeaponTexture() {
		GUI.Label(new Rect(20, 20, 100, 40), HUD_Icon);
	}
}
2

FireRateLimiter is a coroutine, and in C# you have to start coroutines using StartCoroutine method.

3

In order to start a coroutine you need to use a special function that is I agree not so obvious:

StartCoroutine(couroutine());

Fact is in UnityScript you do not need it but in C# you do.