Movement of a bullet

I need help with bullets. I have followed a tutorial which explains how to simulate bullets that are shooted. Unfortunately, I have done exactly what I was seeing but I can't figure out why these bullets are not going ahead when I shoot them.
Basically, the idea is that when the bullet is instantiated, it continues to translate on the axis Y (or whatever axis, depending on the rotation of the object). This bullet is applied to a "gun" which has a variable of type gameObject, at which I attach the bullet. This gun has also a script, which is responsible for creating the bullet on the volley. The bullet has a rigidbody component (with unchecked "use gravity") to make it collide with other rigidbody components.
The problem is that this bullet seems to float in the air or seems to make spiral rotations. It has been a long time that I have tried to understand why my bullets are not going ahead. This is making me nervous.
Please help me with this situation. Thank you.

This is my code for the gun:

Code (csharp):

1.  
2.     public GameObject bullet;
3.     //static in this case means that it can be access before an object is instantiated.
4.     //It behaves like a global variable
5.     public static int numberOfBullets = 20;
6.     public GUIText counter;
7.  
8.     // Update is called once per frame
9.     void Update()
10.     {
11.         counter.text = "Bullets: " + numberOfBullets.ToString();
12.  
13.         if (Input.GetKeyDown(KeyCode.E))
14.         {
15.             if (numberOfBullets > 0)
16.             {
17.                 Instantiate(bullet, transform.position, transform.rotation);
18.                 --numberOfBullets;
19.             }
20.         }
21.  
22.         if (Input.GetKeyDown(KeyCode.R))
23.         {
24.             if(numberOfBullets < 20)
25.                 numberOfBullets += (20 - numberOfBullets);
26.         }
27.     }
28.  
29.  
30. //This is my code for the bullet:
31.     public float speed = 0f;
32.  
33.     // Update is called once per frame
34.     void Update ()
35.     {
36.         transform.Translate(0, speed * Time.deltaTime, 0);
37.     }

 

Please post your code properly. It's a headache to read wall of unformatted text. http://forum.unity3d.com/threads/using-code-tags-properly.143875/unread

Not sure what can be wrong with bullets. Script seems to be ok. Try to play with rotation freeze on the bullet's rigidbody.

 

If

I have tried but nothing changes or at least it doesn't solve my problem..

 

And I guess you didn't forget to set in your bullet's prefab speed greater than zero?

 

Yes, I didn't forget to set it. It is set to 100

 

Aha I see. Then the only problem that is left is that you spawn bullets inside the gun. You need to spawn them outside, so they don't collide with the gun itself.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class GunScript : MonoBehaviour
5. {
6.     public GameObject bullet;
7.     //static in this case means that it can be access before an object is instantiated.
8.     //It behaves like a global variable
9.     public static int numberOfBullets = 20;
10.     public GUIText counter;
11.     public float offset = 1.0f;
12.     // Update is called once per frame
13.     void Update()
14.     {
15.         counter.text = "Bullets: " + numberOfBullets.ToString();
16.         if (Input.GetKeyDown(KeyCode.E)) {
17.             if (numberOfBullets > 0) {
18.                 Vector3 pos = transform.position;
19.                 pos.y += offset;
20.                 Instantiate(bullet, pos, transform.rotation);
21.                 --numberOfBullets;
22.             }
23.         }
24.         if (Input.GetKeyDown(KeyCode.R)) {
25.             if (numberOfBullets < 20)
26.                 numberOfBullets += (20 - numberOfBullets);
27.         }
28.     }
29. }

 

Alternatively if spawning bullets outside of the gun makes it look ugly and you don't like to mess with gun's collider and bullet's movement is always straight forward....
You can enable all 6 constraints in rigidbody of your bullet.

 

Ok, it works only if my helicopter is not moving at all. If I move it the bullets travel with a spiral route, but I think its due to the unity physic simulations, right?
But is there a way to simulate a shooting better?

If I checked the constrains in the rigidbody component, the bullet passes throught other rigidbodies...