World Space axis to Local Space

Hi, so I'm trying to make a RPG launcher to shoot the projectile. I've attached a Rigidbody to projectile. The projectile is a child of the Main RPG prefab. I need it to move forward on its local axis (Way where the camera is directed) but it moves forward in the World Space. So I need to know how to move it through Local Axis. Here's the code, Thanks.

Code (JavaScript):

1. #pragma strict
2.  
3. var projectile : Rigidbody;
4. var speed : int = 500;
5.  
6. function Update ()
7. {  
8.      if(Input.GetButton("Fire1"))
9.      {
10.           projectile.transform.parent = null;
11.           {
12.                projectile.velocity = Vector3.forward;
13.           }
14.      }
15. }

 

Vector3.forward by itself is in world space. I think what you need is

Code (JavaScript):

1. projectile.velocity = (Vector3.forward, Space.Self)

 

Hi, I tried it but I'm getting some errors.
When I write the code like this, how you've written.

Code (JavaScript):

1. #pragma strict
2.  
3. var projectile : Rigidbody;
4. var speed : int = 500;
5.  
6. function Update ()
7. {  
8.      if(Input.GetButton("Fire1"))
9.      {
10.           projectile.transform.parent = null;
11.           {
12.                projectile.velocity = (Vector3.forward, Space.Self);
13.           }
14.      }
15. }

I get 3 errors,
1. Shooter.js(12,54): BCE0044: expecting ), found ','.
2. Shooter.js(12,55): UCE0001: ';' expected. Insert a semicolon at the end.
3. Shooter.js(12,66): BCE0043: Unexpected token: ).

When I write like this,

Code (JavaScript):

1. #pragma strict
2.  
3. var projectile : Rigidbody;
4. var speed : int = 500;
5.  
6. function Update ()
7. {  
8.      if(Input.GetButton("Fire1"))
9.      {
10.           projectile.transform.parent = null;
11.           {
12.                projectile.velocity = transform.Translate(Vector3.forward, Space.Self);
13.           }
14.      }
15. }

I get this,
1. Shooter.js(12,57): BCE0022: Cannot convert 'void' to 'UnityEngine.Vector3'.

Please help!