Calculating distance is not working

Hello, I am working on a game, but when calculating the distance between the position of a ray cast hit from my camera to a terrain collider, it doesn't seem to work properly. RaycastHit hit; Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, out hit, 10f) && hit.collider.GetType() == typeof(TerrainCollider)) { Debug.Log("Terrain Hit"); offset = Vector3.Distance(hit.transform.position, Camera.main.transform.position); }

As you can see, I have a float offset, which, at the beginning of a drag (I am pretty sure the rest of the class is not needed) is evaluated to be the distance between the camera and the object being dragged, but now, I need my offset to change when I drag the object. I get a log when I move the cursor near the terrain, however, the dragged object is not moving, and when I Debug.Log offset, it stays the same even when moved around different parts of the terrain. Any help?