Follow object to mouse position

Hello everyone
Its hard for me to explain what I want to reach
So I found this video where you can see what I want to do

I need to follow some object to mouse, but only in unity's X and Z in 3D world
I tried google many times but only what I found is this

(Observe from 10 seconds)

Code (CSharp):

1.     private Vector3 screenPoint;
2.  
3.     void Start () {
4.         screenPoint = Camera.main.WorldToScreenPoint(gameObject.transform.position);
5.     }
6.  
7.     void Update () {
8.         Vector3 curScreenPoint = new Vector3 (Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
9.         Vector3 curPosition = Camera.main.ScreenToWorldPoint (curScreenPoint);
10.         transform.position = curPosition;
11.     }
12. }

But this uses x y z coordiantes

Thanks for help and sorry for my terrible English.

 

Try this instead.

Code (CSharp):

1.  
2.   void Update () {
3.      //do a raycast from the camera through the screen
4.      //at the mouse cursor position into the 3d world
5.      RaycastHit hit;
6.      Vector3 mousePos = Input.mousePosition;
7.      if (!Physics.Raycast(Camera.main.ScreenPointToRay(mousePos), out hit))
8.        {
9.        //didn't hit anything. don't do anything
10.        return;
11.        }
12.  
13.      //must have hit something
14.      //set the transform position to the point in 3d space where
15.      //our raycast intersected something
16.      transform.position = hit.point;
17.      }
18.  

 

With your current code, you just need to alter the y you get.

Code (CSharp):

1.  
2. curPosition.y = transform.position.y;
3. transform.position = curPosition;
4.  

If you are looking for spell effects like that, you should research decals as they will be extremely helpful.

 

That is what I need, thanks, it works perfectly

 

Thanks for your attention, I will search decals as well.