Question by 
               Kyura21 · Mar 31, 2017 at 07:38 AM · 
                unity 5raycastnullreferenceexceptionray  
              
 
              Ray null reference exception and wrong direction when casting it
Hi All,
in a few words here's my problem:
I got a camera attached to a MouseManager script (C#). I got an aquarium were some fishes spawn and go happy to theyr life. From this view i need to cast a ray to the acquarium on the mouse click ( i have to select the fishes from the mouse click ). then i need to attach the transform of the fish selected from the mouse click to the mouse position (drag & drop).
Here's my code.
public class MouseManager : MonoBehaviour {
 public Camera Camm;
 void Start(){
     RaycastHit vHit = new RaycastHit();
     Ray raggio = Camm.ScreenPointToRay(Input.mousePosition);
 }
 void Update(){
     if (Input.GetMouseButtonDown (0)) {
         if(Physics.Raycast(raggio,out vHit,1000)){
         //Physics.Raycast (raggio, out vHit, 100);
             Debug.DrawRay (raggio.origin, raggio.direction * 10, Color.red, 1);
         Debug.Log(vHit.collider.gameObject);
         }
     }
     if (umano.cam1.transform.position == umano.pos3.transform.position) {
         
         if (Input.GetMouseButtonDown (0) && Physics.Raycast (raggio, out hit, 100)) {
             //Physics.Raycast (raggio, out hit, 10);
             Debug.DrawRay (raggio.origin, raggio.direction * 10, Color.red, 3);
             Debug.Log(hit.collider.gameObject);
                 if (hit.collider.tag == "pesce") {
                     Debug.Log (hit.collider.gameObject);
                 }
         }
     }
 }
 
 public void OnMouseDown(){
     dist = Camera.main.WorldToScreenPoint (transform.position);
     posx = Input.mousePosition.x - dist.x;
     posy = Input.mousePosition.y - dist.y;
 }
 public void DragDrop(){
     Vector3 curPos = new Vector3 (Input.mousePosition.x - posx, Input.mousePosition.y - posy, dist.z);
     Vector3 worldPos = Camera.main.ScreenToWorldPoint (curPos);
     transform.position = worldPos;
 }
}
The problem is that the ray it's going everywhere but not in the position of the mouse.
Someone can help me?
Kind regards
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              koobas.hobune.stream
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