How can I autofire a ships gun every half second C#

Questions & Answers
1

I am making an oldfashioned sci-fi style shootemup and I want to make the main gun fire about every 0.5 seconds. This is what I have so far.
using UnityEngine;
using System.Collections;

public class laserblast : MonoBehaviour {
	public Rigidbody laser;
	public Rigidbody ship;

	void Update () {
		if (Input.GetKey("d"))
		{
			Instantiate (laser,ship.position,ship.rotation);
		}
	}
}

as you can see, when I press “d”, laser fires from the ship. My problem is that another laser fires every frame and I would like to know how to control that so the laser comes in only every half second. Thank you.

2

You should add variables “timeAtLastShot” and “minTimeBetween2Shots” (.5f is you want .5 seconds).

Then you do:

if (Input.GetKey("d") && (Time.time - timeAtLastShot) >= minTimeBetween2Shots)
{
       Instantiate (laser,ship.position,ship.rotation);
       timeAtLastShot = Time.time;
}