title: How to move unity prefab to mouse click position?
body: <p>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.</p>
  
  <pre><code>public GameObject[] model_prefabs;
  
  void Start () {
      //for (int i = 0; i &lt; 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");
          }
      }
  }
  </code></pre>
  
  <p>I convert from mouse click positions to world coordinates. They looks like suitable.</p>
  
  <pre><code>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
  </code></pre>
  
  <p>How can I move this object?</p>