DrawLine

 

  // Offset position above object bbox (in world space)

  float offsetPosY = target.transform.position.y + 1.5f;

 

  // Final position of marker above GO in world space

  Vector3 offsetPos = new Vector3(target.transform.position.x, offsetPosY, target.transform.position.z);

 

  // Calculate *screen* position (note, not a canvas/recttransform position)

  Vector2 canvasPos;

  Vector2 screenPoint = Camera.main.WorldToScreenPoint(offsetPos);

 

  // Convert screen position to Canvas / RectTransform space <- leave camera null if Screen Space Overlay

  RectTransformUtility.ScreenPointToLocalPointInRectangle(canvasRect, screenPoint, null, out canvasPos);

 

  // Set

  markerRtra.localPosition = canvasPos;