Add boundaries to a camera drag

Unity Engine
,
1

I’m just trying to add boundaries to this script here (it drags my camera around the screen). I want my camera to stop if it reaches a certain distance away. I’ve tried using a distance check, but once I get outside that, I can’t move the camera at all anymore… Here’s my code:

if(blah)
{
float HitDist;

				 Ray MouseRay = Camera.main.ScreenPointToRay(Input.mousePosition);

				 Vector3 GroundNormal = new Vector3(0.0f, 1.0f, 0.0f),

				         GroundPoint = new Vector3(0.0f, 0.0f, 0.0f);

				 Plane GroundPlane = new Plane(GroundNormal, GroundPoint);

			

				 if (m_Drag)

				 {

				     GroundPlane.Raycast(MouseRay, out HitDist);

				     Vector3 CurClickPos = MouseRay.GetPoint(HitDist);

					test = Vector3.Distance(new Vector3(0,0,0), transform.position);

				     Camera.main.transform.position += m_MouseDownPos - CurClickPos;

				 }

				 else //if (Input.GetMouseButtonDown(0))

				 {

				     GroundPlane.Raycast(MouseRay, out HitDist);

				     m_MouseDownPos = MouseRay.GetPoint(HitDist);

				     m_Drag = true;

				 }

			}

        }

		else

			m_Drag = false;

thoughts on how I could do this? I realize it is using PC controls right now, I just haven’t changed them to touch controls yet, but posted my question here so people would assume I wanted a portable optimized solution.

2

bump