Unity 2D Raycast Detecting Object Problem

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It detects the beam even if it passes over the object. I want it to detect when it's right on the object.

void RaycastSystem()
{
    Vector2 mousePosition = new Vector2(Input.mousePosition.x, Input.mousePosition.y);
    Vector2 worldMousePosition = Camera.main.ScreenToWorldPoint(mousePosition);

    Vector2 rayDirection = worldMousePosition - (Vector2)transform.position;

    RaycastHit2D hit = Physics2D.Raycast(transform.position, rayDirection, rayDirection.magnitude, mask);
    Debug.DrawRay(transform.position, rayDirection, Color.red);
    //Debug.Log(worldMousePosition.x + " | " + worldMousePosition.y);

    if (hit.collider != null)
    {
        Debug.Log(hit.collider.gameObject);
    }
}

How can i solve this problem?

If you mean you only want it to detect the object when the cursor is directly on it and not when there's a line through the object, then you're very close. The issue is what you are testing is if there is any colliders between the transform and the mouse cursor. Instead of casting a Ray from the character transform, you want to raycast from the 'Screen'. Unity has a built in way of doing this thankfully.

Try something like this

void RaycastSystem()
    {
        Ray ray = camera.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;
    
        if(Physics.Raycast(ray, out hit, Mathf.Infinity, mask))
        {
            Debug.Log(hit.collider.gameObject);
        }
        
    }

Essentially what this approach is doing is casting the ray direction from the mouse point on the screen -into- the screen.

If I understand your latest comments correctly you actually want to have two checks

• Is the user hovering an object with the mouse
• Can the same object be hit by the raycast from the player object

So you would combine both

void RaycastSystem()
{
    Vectror2 worldMousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);

    // first check if hitting an object with the mouse
    var mouseHit = Physics2D.OverlapPoint(worldMousePosition);
    if(mouseHit != null)
    {
        var rayDirection = worldMousePosition - (Vector2)transform.position;

        // then check via raycast
        var hit = Physics2D.Raycast(transform.position, rayDirection, rayDirection.magnitude, mask);

        if (hit.collider != null)
        {
            if(hit.collider == mouseHit)
            {
                Debug.Log("HIT {hit.collider.name}!");
                // do something with hit
            }
            // else some other object is in between
        }
        // else not hitting anything with the ray (e.g. too far away)
    }
    // else not hitting anything with the mouse
}

Can of course invert the order and first do the raycast and then in the inner block do the mouse check - according to your needs / performance checks.