I am getting error
NullReferenceException: Object reference not set to an instance of an object SinglePoint.Update () (at Assets/Script/SinglePoint.cs:52)
and this is my block of code
if (Input.GetMouseButtonDown (0)) {
//line 52 where error exists: Vector3
currentPosition=Camera.main.ScreenToWorldPoint(Input.mousePosition);
currentPosition.z=-5.0f;
InstatiateCirclePoint(currentPosition,currentLineRenderer.transform);
}