How to move unity prefab to mouse click position?

Question

I create an unity3d application that loads prefab and move it. I can load a cube prefab using world coordinate.I want to move this object to mouse click position. To do this work, I use below code. My object doesn't move anywhere.

public GameObject[] model_prefabs;

void Start () {
    //for (int i = 0; i < 1; i++) {
    int i = 0;
        Instantiate (Resources.Load ("Cube"), new Vector3 (i * 1.8F - 8.2f, 0, 0), Quaternion.identity);
    //}
}

void Update() {

    if (Input.GetKey("escape"))
        Application.Quit();

    if (Input.GetMouseButtonDown (0)) {

        Debug.Log ("mouseDown = " + Input.mousePosition.x + " " + Input.mousePosition.y + " " + Input.mousePosition.z);
        Plane p = new Plane (Camera.main.transform.forward , transform.position);
        Ray r = Camera.main.ScreenPointToRay (Input.mousePosition);
        float d;
        if (p.Raycast (r, out d)) {
            Vector3 v = r.GetPoint (d);
            //return v;
            Debug.Log ("V = " + v.x + " " + v.y + " " + v.z);
            transform.position = v;
        }
        else {
            Debug.Log ("Raycast returns false");
        }
    }
}

I convert from mouse click positions to world coordinates. They looks like suitable.

mouseDown = 169 408 0
V = -5.966913 3.117915 0

mouseDown = 470 281 0
V = -0.1450625 0.6615199 0

mouseDown = 282 85 0
V = -3.781301 -3.129452 0

How can I move this object?

Answer 1

I use below code. It works for me.

void Start () {
    for (int i = 0; i < 3; i++) {
        gO[i] = Instantiate (Resources.Load ("Cube"), new Vector3 (i * 1.8F - 8.2f, 0, 0), Quaternion.identity) as GameObject;
    }
}

void Update() {

    if (Input.GetKey("escape"))
        Application.Quit();
#if UNITY_EDITOR
    if (Input.GetMouseButtonDown (0)) {
        Debug.Log ("mouseDown = " + Input.mousePosition.x + " " + Input.mousePosition.y + " " + Input.mousePosition.z);
        Plane p = new Plane (Camera.main.transform.forward , transform.position);
        Ray r = Camera.main.ScreenPointToRay (Input.mousePosition);
        float d;
        if (p.Raycast (r, out d)) {
            Vector3 v = r.GetPoint (d);

            for (int i = 0; i < 3; i++) {
                gO[i].transform.position = v;
                v.y = v.y - 2f;
            }
        }
    }
#endif