Can't drag on x axis

Questions & Answers
1

I’m using a .cs script for dragging an obhect, and raising it so it stacks on top of another. The problem I’m having is that the object the script is attached to can only be dragged along the z axis. I need to be able to drag on the x/z.

using UnityEngine;
using System.Collections;

[RequireComponent (typeof (Rigidbody))]
public class ST_Box : MonoBehaviour
{
	
	public static ST_Box Instance;
	public int normalCollisionCount = 1;
	public float moveLimit = .5f;
	public float collisionMoveFactor = .01f;
	public float addHeightWhenClicked = 0.0f;
	public bool freezeRotationOnDrag = true;
	public Camera cam;
	private Rigidbody myRigedbody;
	private Transform myTransform;
	public bool canMove = false;
	private float yPos;
	private bool gravitySetting;
	private bool freezeRotationSetting;
	private float sqrMoveLimit;
	private int collisionCount = 0;
	private Transform camTransform;
	
	//private
	
	private float mouseStartY;
	public float zOffset;
	
	void Start () {
		Instance = this;
		myRigedbody = rigidbody;
		myTransform = transform;
		if(!cam)
			cam = Camera.main;
		
		if(!cam){
			Debug.LogError("Can't find camera tagged MainCamera");
			return;
		}
		
		camTransform = cam.transform;
		sqrMoveLimit = moveLimit * moveLimit;
	}
	
	
	public void Lift () {
		Debug.Log("LIFT");
		canMove = true;
		myTransform.Translate(Vector3.up * addHeightWhenClicked);
		gravitySetting = myRigedbody.useGravity;
		freezeRotationSetting = myRigedbody.freezeRotation;
		myRigedbody.useGravity = false;
		myRigedbody.freezeRotation = freezeRotationOnDrag;
		yPos = myTransform.position.y;
		mouseStartY = Input.mousePosition.y;
	}
	
	public void Release ()	 {
		canMove = false;
		myRigedbody.useGravity = gravitySetting;
		myRigedbody.freezeRotation = freezeRotationSetting;
		if (!myRigedbody.useGravity)
			myTransform.position = new Vector3(myTransform.position.x, yPos - addHeightWhenClicked, myTransform.position.z);
	}	
	
	void OnCollisionStay (Collision collision) {
		Debug.Log("OnCollisionEnter");
		collisionCount++;	
		
		HandleCollision(collision);
	}
	
	void HandleCollision(Collision collision)
	{
		if(canMove){
			float y_pos = 0;
			for(int n = 0; n < collision.contacts.Length; n++){
				ContactPoint contact = collision.contacts[n];
				Quaternion rot = Quaternion.FromToRotation(Vector3.up, contact.normal);
				Vector3 pos = contact.point;
				float temp_y = contact.otherCollider.bounds.size.y + contact.otherCollider.transform.position.y;
				if(temp_y > y_pos) y_pos = temp_y;
			}
			if((y_pos + addHeightWhenClicked) > yPos) 
				yPos = y_pos + addHeightWhenClicked;
			
			
			//Instantiate(explosionPrefab, pos, rot) as Transform;
		
		}
	}
	
	void OnCollisionExit (Collision collision) {
		Debug.Log("OnCollisionExit");
		collisionCount--;	
		//HandleCollision(collision, false);
	}
	
	// Update is called once per frame
	void FixedUpdate () {
		
		Vector3 mousePos = Input.mousePosition;
		Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
		RaycastHit hit;
		
		int layerMask = 1 << 8;
		layerMask = ~layerMask;
		if(Physics.Raycast(ray, out hit, Mathf.Infinity ,layerMask)){
			Debug.DrawLine(ray.origin, hit.point, Color.yellow);	
			Debug.Log(hit.point);
		}
		
		if (!canMove) return;
		
		myRigedbody.velocity = Vector3.zero;
		myRigedbody.angularVelocity = Vector3.zero;
		myTransform.position = new Vector3(myTransform.position.x, yPos, myTransform.position.z);
		
		
		
		//if our hit.point is not null then set our z position to hit.point.z
		Debug.Log(hit.point.z);
		Vector3 move = cam.ScreenToWorldPoint(new Vector3(mousePos.x, 0, hit.point.z)) - myTransform.position;
		move.y = 0.0f;

		
		if (collisionCount > normalCollisionCount) {
	        move = move.normalized*collisionMoveFactor;
	    }
	    else if (move.sqrMagnitude > sqrMoveLimit) {
	        move = move.normalized*moveLimit;
	    }
		
		
		
	    myRigedbody.MovePosition(myRigedbody.position + move);
		myRigedbody.position = new Vector3(myRigedbody.position.x, myRigedbody.position.y, hit.point.z);
	}
}
2

Got it. Changed the last line to this:
myRigedbody.position = new Vector3(hit.point.x, myRigedbody.position.y, hit.point.z);