Unity Script Generated by ScripterAI

"draw line by dragging mouse"

public class DrawRect : MonoBehaviour
{
    [SerializeField]
    private Text areaText;

private LineRenderer lineRend;
    private Vector2 initialMousePosition, currentMousePosition;

private float area;

// Start is called before the first frame update
    void Start()
    {
        lineRend = GetComponent<LineRenderer>();
        lineRend.positionCount = 0;
        areaText.text = "Area = "   area;
    }

// Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            lineRend.positionCount = 4;
            initialMousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            lineRend.SetPosition(0, new Vector2(initialMousePosition.x, initialMousePosition.y));
            lineRend.SetPosition(1, new Vector2(initialMousePosition.x, initialMousePosition.y));
            lineRend.SetPosition(2, new Vector2(initialMousePosition.x, initialMousePosition.y));
            lineRend.SetPosition(3, new Vector2(initialMousePosition.x, initialMousePosition.y));
        }

if (Input.GetMouseButton(0))
        {
            currentMousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            lineRend.SetPosition(0, new Vector2(initialMousePosition.x, initialMousePosition.y));
            lineRend.SetPosition(1, new Vector2(initialMousePosition.x, currentMousePosition.y));
            lineRend.SetPosition(2, new Vector2(currentMousePosition.x, currentMousePosition.y));
            lineRend.SetPosition(3, new Vector2(currentMousePosition.x, initialMousePosition.y));

area = Mathf.Abs(
                (initialMousePosition.x - currentMousePosition.x) *
                (initialMousePosition.y - currentMousePosition.y));

areaText.text = "Area = "   area;
        }
    }