Rotate instantiated object for rocket

Questions & Answers
1

How would I go about rotating a bullet after its instantiated. The rocket launcher shoots but the bullets come out vertical instead of horizontal.

#pragma strict

var rocketPrefab : Rigidbody;
var barrelEnd : Transform;


function Update () 
{
	if (Input.GetButtonDown("Fire1"))
	{
		var rocketInstance : Rigidbody;
		rocketInstance = Instantiate(rocketPrefab, barrelEnd.position, barrelEnd.rotation) as Rigidbody;
		rocketInstance.AddForce(barrelEnd.forward * 5000);
        DestroyObject(rocketInstance.gameObject, 2);
	}
}
2

The fact that the bullets come out vertical has to do with the mesh. Your possible solutions:

  • Re-author the bullet in a 3D modeling program.
  • Make the visible object a child of an empty game object. Rotate the visible object so that the front is pointing towards positive ‘z’ when the parent object has a rotation of (0,0,0).
  • Use the RotateMesh editor script to create a clone of your object with the right rotation.
  • It can be done in by applying an extra rotation in code. After the instantiate you could do:
rocketInstance.rotation = Quaterion.Euler(0,0,90) * rocketInstance.rotation;

The (0,0,90) was just an example. You would have to figure out the correct rotation.

3

Use barrelEnd.transform.forward or barrelEnd.transform.up see which one is best for you

or

parent the rocket to an empty gameobject and then rotate the rocket inside the game object