using UnityEngine;

public class TestRay : MonoBehaviour
{
    #region SerializeFields
    [SerializeField] private float maxDistance = 5f;
    #endregion

    #region Private
    private Vector3 point = Vector3.zero;
    #endregion

    #region Unity methods
    private void Update()
    {
        var mousePosition = Input.mousePosition;
        var ray = Camera.main.ScreenPointToRay(mousePosition);

        if (Physics.Raycast(ray, out var hit))
            point = hit.point;
        else
        {
            var worldPoint = Camera.main.ScreenToWorldPoint(new Vector3(mousePosition.x, mousePosition.y, Camera.main.farClipPlane));
            var p = transform.position + (worldPoint - transform.position).normalized * maxDistance;
            ray = new Ray(p + Vector3.up * 3f, Vector3.down);

            if (Physics.Raycast(ray, out var hit2))
                point = hit2.point;
            else
                point = transform.position;
        }

        Debug.DrawLine(transform.position + Vector3.up, point, Color.green);
    }

    private void OnDrawGizmos()
    {
        Gizmos.color = Color.green;
        Gizmos.DrawSphere(transform.position + Vector3.up, 0.075f);
        Gizmos.color = Color.red;
        Gizmos.DrawSphere(point, 0.05f);
    }
    #endregion
}