split object when player touches anywhere in the screen

Questions & Answers
1

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

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2

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;
    }
    
}