Locking on target with angle (mostly working)

Questions & Answers
1

Hi, Im a bit new to unity and 3D programming in general so I apologize for this basic question. Furthermore, it appears that is a very common question but after looking around I guess Im just not understanding some key concepts.

At the moment I have a turret object that changes rotation based on the players position. (locked to y) Its working fine. The turret also fires a fireball every second from a “spawn point” in front of it. What I want to happen is to have the spawnPoint, which it fires from, angle down and up based on the players position. I thought I could do this with LookRotation but it fires straight all the time. I assume this is because of the transform.forward when I fire.

Here is my code for my script.

var LookAtTarget:Transform;
var damp = 1.0;
var bulletPrefab:Transform;
var passedTime = 0.0;
var shootRate:double = 1.0;
var homingSpeed:double = 3.0;
var minDistance:double = 3.0;

function Update () 
{
	//x and z lock
	if (LookAtTarget)
	{
		//Move toward player position
		
		//float fX = desX-playerX;
		var fx = gameObject.Find("Worm").transform.position.x - transform.position.x;
		var fy = gameObject.Find("Worm").transform.position.y - transform.position.y;
		var fz = gameObject.Find("Worm").transform.position.z - transform.position.z;

		var dist = Mathf.Sqrt(fx * fx + fy * fy + fz * fz);
		
		if (dist > minDistance)
		{
			var step = homingSpeed / dist;
		
			transform.position.x += (fx * step) * Time.deltaTime;
			transform.position.z += (fz * step) * Time.deltaTime;
		}
			
		var rotate = Quaternion.LookRotation(LookAtTarget.position - transform.position);
		transform.rotation = Quaternion.Slerp(transform.rotation, rotate, Time.deltaTime * damp);
		
		//Move shooting mechanism angeled at player
		var rotateFireball = Quaternion.LookRotation(LookAtTarget.position - transform.position);
    	
    	transform.FindChild("spawnPoint").transform.rotation = rotateFireball;
    	//transform.FindChild("spawnPoint").transform.rotation = Quaternion.Slerp(transform.FindChild("spawnPoint").transform.rotation, newRotateFireball, Time.deltaTime * damp);
		
		passedTime += Time.deltaTime;
		
		//1 second has passed
		if (passedTime >= shootRate)
			Shoot();
	}
	
	transform.rotation.x = 0;
	transform.rotation.z = 0;
}

function Shoot()
{
	var bullet = Instantiate(bulletPrefab, transform.Find("spawnPoint").transform.position, Quaternion.identity);
	
	bullet.gameObject.tag = "enemyProjectile";
	bullet.rigidbody.AddForce(transform.FindChild("spawnPoint").transform.forward * 1000);
	passedTime = 0;
}

Im not even fully sure why LookRotation(target.position - transform.position) is necessary either. But it seems to work for the turret rotation. I figure you would just need LookRotation(target.position)

Anywho, if anyone can help, I would greatly appreciate it. Thanks!

2

Fixed.

var rotateFireball = Quaternion.LookRotation(LookAtTarget.position - transform.position);

Should be:

var rotateFireball = Quaternion.LookRotation(LookAtTarget.position - transform.FindChild("spawnPoint").transform.position);