Quaternion Rotation and me. I love you.

I wish to rotate an object locally 90 degrees from its original direction, and all future rotation
take this into account when changing direction. I want it to act like the left side of the object is the front. Thanks in advance, I'm not the brightest light bulb. I will make my game though!!

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class LookAtTarget : MonoBehaviour
5. {
6.     private GameObject target;
7.     private Vector3 targetPoint;
8.     private Quaternion targetRotation;
9.  
10.     void Start ()
11.     {
12.         target = GameObject.FindWithTag("Player");
13.         //transform.forward = (new Vector3(90,90, 90));
14.     }
15.  
16.     void Update()
17.     {
18.         targetPoint = new Vector3(target.transform.position.x, transform.position.y, target.transform.position.z) - transform.position;
19.         targetRotation = Quaternion.LookRotation (-targetPoint, Vector3.up);
20.         transform.rotation = Quaternion.Slerp (transform.rotation, targetRotation, Time.deltaTime * 10.0f/*2.0f*/) * (Vector3.left);
21.         /*
22.         * The above code turn the object this script is attachted to towards the player.
23.         * It works, but the object is not aligned foward properly(Blender imported object)
24.         * I'm trying to rotate the object an addition 90 degrees left(Local) below.
25.         * It doesn't work at all can't convert vector3 to Quaternion
26.         */
27.  
28.         //transform.rotation = Quaternion.Euler(transform.rotation.x, transform.rotation.y + 90, transform.rotation.z);
29.  
30.        
31.     }
32. }

 

Use code tags.

 

I think you can just multiply the transform rotation:
You have to change your target rotation:
Quaternion tRotation = target.transform.rotation*Quaternion.Euler(0,90,0);
Then replace target rotation with that in the slerp.