Question by JoniBerg · Mar 20, 2019 at 02:15 PM · ui raycast mouseposition

What is error on Raycasting?

Why i create new gameobject without raycast hit?

 RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
 
 
             {
                 if (Input.GetMouseButtonDown(0))
                 {
 
                     print(hit.point);
                    
                
                 
                     var nGo = new GameObject("temp");
 
                     GameObject go = Instantiate(nGo, hit.point, Quaternion.identity);
                     print("Luodaan uusi image");
                     go.gameObject.tag = "Decal";
                     go.transform.parent = decalsFolder.transform;
                     go.gameObject.AddComponent<Image>();
                     go.gameObject.AddComponent<BoxCollider2D>();
                     go.gameObject.GetComponent<BoxCollider2D>().isTrigger = true;
                     go.gameObject.AddComponent<Rigidbody2D>();
                     go.gameObject.GetComponent<Rigidbody2D>().gravityScale = 0;
                     go.gameObject.GetComponent<Rigidbody2D>().bodyType = RigidbodyType2D.Kinematic;
                     //  go.gameObject.GetComponent<Rigidbody>().isKinematic = true;
                     // go.gameObject.GetComponent<Image>().sprite = hit.collider.;
                     go.gameObject.AddComponent<ItemDragHandler>();
                     go.layer = 5;
                     // hit.collider.gameObject.SetActive(false);
                     go.transform.position = (Input.mousePosition);
 
                     
 
                 }
             }
         }

This photo raycast hit point is empty: https://imgur.com/a/8cTWMrh

Add comment · Show 2

Ymrasu · Mar 20, 2019 at 03:19 PM 0

You are creating a gameobject without a raycast hit because you are not checking if the raycast hit anything. You should add an if statement if (hit.collider != null)

JoniBerg Ymrasu · Mar 20, 2019 at 06:46 PM 0

I fix code to:

  RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
 
         if (hit.collider != null)
         {          
 
             print(hit.collider.name);
 
             var nGo = new GameObject("temp");
 
             GameObject go = Instantiate(nGo, hit.point, Quaternion.identity);
             print("Created new image");
             go.transform.parent = decalsFolder.transform;
             go.gameObject.AddComponent<Image>();
             // go.gameObject.GetComponent<Image>().sprite = hit.collider.;
             go.gameObject.AddComponent<ItemDragHandler>();
             go.layer = 5;
             // hit.collider.gameObject.SetActive(false);
             go.transform.position = (Input.mousePosition);
 
         }

Now i see buttons effect if is pressed but why new image no created? :( Is so simple bug. @Ymrasu