split object when player touches anywhere in the screen

Question

i made a game where u throw knives , i already made a throwing script , it works fine , but how can i add a knife with an ability to split into 3 knives when player touches anywhere (after throwing )? see code sample and image for reference

  void Start()
     {
         rb = GetComponent<Rigidbody2D>();
         //rb.rotation = 45f;
         //AudioSource throwsound = gameObject.AddComponent<AudioSource>();
         shu_throw = GetComponent<AudioSource>();
         audioSource = GetComponent<AudioSource>();
         RotShu.SetActive(false);
         alphalevel = 1f;
         //InvokeRepeating("spawntrail", 0.05f, 0.05f);
         
     }
 
     void Update()
     {
 
         if (IsPressed)
         {
             Vector2 mousepos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
 
             //------
            
             //-------
 
             if (Vector3.Distance(mousepos, hook.position) > maxdragdis)
             {
                 rb.position = hook.position + (mousepos - hook.position).normalized * maxdragdis;
             }
             else
 
                 rb.position = mousepos;
         }
        
 
 
     }
 
     void OnMouseDown()
     {
         IsPressed = true;
         rb.isKinematic = true;
 
        
 
     }
 
     void OnMouseUp()
     {
 
         IsPressed = false;
         rb.isKinematic = false;
         StartCoroutine(Release());
         //shu_throw.Play();
         RotShu.SetActive(true);
         GetComponent<SpriteRenderer>().color = new Color(1, 1, 1, 0);

the throwing is done , all i want is a script that allows detection of player touch so th eobject splits after throwing , just to make this clear and simple , seen that blue bird in angry birds ? when you shoot it u click on screen whenever you want and the birds splits into 3 ? thats what i want to make, i want just the click detection part i will take care of the rest , and thank you alt text

Answer 1

You could use Input.GetMouseDown() in an update function attached to the base knife:

 void Update()
 {
     if (Input.GetMouseButtonDown(0))
     {
         Debug.Log("MouseClicked");
     } 
 }

This is a bit crude but it works. For somthing more advanced like If you want it to ignore if you've clicked on something you could write your own Input manager to fire a raycast when Input.GetMouseButtonDown(0) is detected and tigger an event if nothing is hit, Here's an example of raycasting with the clicked position from something I'm working on:

 public class InputManager : MonoBehaviour
 {
     //Define interactions in inspector
     [SerializeField] LayerMask mouseInteractables = default;
 
     // Update is called once per frame
     void Update()
     {
         if (Input.GetKeyDown(KeyCode.Mouse0))
         {
             RaycastHit2D[] hits = GetSortedRayIntersectionAll(CameraController.activeCamera.ScreenPointToRay(Input.mousePosition));
 
             //Trigger on click event for object
             if (hits.Length > 0) {
                 CustomBehaviour trigger = hits[0].collider.gameObject.GetComponent<CustomBehaviour>();
                 if (trigger != null)
                     trigger.MyOnMouseDown();
                 else Debug.LogWarning("Clicked collider does not have a CustomBehaviour script");
             }
         }
 
         if (Input.GetKeyUp(KeyCode.Mouse0))
         {
             RaycastHit2D[] hits = GetSortedRayIntersectionAll(CameraController.activeCamera.ScreenPointToRay(Input.mousePosition));
 
             //Trigger on click event for object
             if (hits.Length > 0)
             {
                 CustomBehaviour trigger = hits[0].collider.gameObject.GetComponent<CustomBehaviour>();
                 if (trigger != null)
                     trigger.MyOnMouseUp();
                 else Debug.LogWarning("Clicked collider does not have a CustomBehaviour script");
             }
         }
 
     }
 
     RaycastHit2D[] GetSortedRayIntersectionAll(Ray ray)
     {
         RaycastHit2D[] hits = Physics2D.GetRayIntersectionAll(ray, Mathf.Infinity, mouseInteractables);
         int[] keys = new int[hits.Length];
         for (int j = 0; j < hits.Length; j++)
         {
             keys[j] = hits[j].collider.gameObject.layer;
         }
         Array.Sort(keys, hits);
         return hits;
     }
     
 }

split object when player touches anywhere in the screen

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