Creating a custom runtime scaler !?

Hi Unity Enthusiasts,

I am creating a scaler function which will let me scale objects at runtime. Basically like the transform gizmo in the Scene View. I do have a dragging script which will allow me to move my objects in screen world directions. I don't want to use the UI scaling an all, I am only concerned with sprites and objects to scale with.

Now, I know we could probably achieve a runtime scaling just by using transform.localScale.x + 5f; from a button click or event system. But I want to do with a simpler edge collider or something I don't know upon my 2D square gameobject (so as to scale square into rectangle of various sizes) by drag object to scale in either directions x or y.

This is my dragging script:

 var screenSpace;
  var offset;
   
  function OnMouseDown(){
      //translate the cubes position from the world to Screen Point
      screenSpace = Camera.main.WorldToScreenPoint(transform.position);
       
      //calculate any difference between the cubes world position and the mouses Screen position converted to a world point  
      offset = transform.position - Camera.main.ScreenToWorldPoint(Vector3(Input.mousePosition.x,Input.mousePosition.y, screenSpace.z));
     
  }
   
  /*
  OnMouseDrag is called when the user has clicked on a GUIElement or Collider and is still holding down the mouse.
  OnMouseDrag is called every frame while the mouse is down.
  */
   
  function OnMouseDrag () {
   
      //keep track of the mouse position
      var curScreenSpace = Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z);    
   
      //convert the screen mouse position to world point and adjust with offset
      var curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset;
   
      //update the position of the object in the world
      transform.position = curPosition;
  }

The problem is that I don't know how to implement scaling function at runtime inside the dragging script, I however tried the scaling script for 3D object scales objects from the center pivot only and does not allow scale down and but also scale up in all directions, which I pretty much I never wanted. Here is a 3D object scaler script if anybody want a reference ( its in the comments below).

P.S : I did saw some of the giant level editor in asset store which has everything of unity gizmo has to offer. I really don't want much that of it, I might not able to implement it as just a simple scaling, even If I'd managed to buy from those of only available expensive ones.

• P.S : To let you guys know, I don't know If it would be helpful enough that I'm scaling a 2D sprite [not a 3d object], from a localPositionX and localPostionY thats it, while we drag the edges of the 2d object (basically I have a white 2d square which I want to scale).

It would be very thankful if someone help me achieve this. :)) Regards.