Object resizing, storing variable and resizing from previous size

Hi

So i have written a script to resize an object by clicking on it and dragging. The problem I'm having is that when I stop dragging and click on the object again, it snaps back to its initial size. I understand that what I have to do is store the size which it was previously resized to, and "start from this size" but I am struggling to get my head round the logic for this.

Code (CSharp):

1. public class DragScalingScript : MonoBehaviour
2. {
3.     public bool dragging = false;
4.     public Vector3 currentMousePosition;
5.     public Vector3 dragStartingPoint;
6.     public Vector3 temp;
7.     public float amountDragged;
8.     private float clampedAmountDragged;
9.  
10.  
11.     private void Awake()
12.     {
13.         amountDragged = 100.0f;
14.  
15.     }
16.  
17.  
18.     // if object is clicked, dragging becomes true
19.     // where ever the object is clicked becomes dragStartingPoint
20.     private void OnMouseDown()
21.     {
22.  
23.  
24.         dragStartingPoint = (Input.mousePosition);
25.  
26.     }
27.  
28.  
29.     //where ever the position of the mouse drag goes is tracked and stored as currentMousePosition
30.     private void OnMouseDrag()
31.     {
32.  
33.         dragging = true;
34.         currentMousePosition = (Input.mousePosition);
35.      
36.  
37.     }
38.  
39.     // when mouse button is released, dragging becomes false
40.     private void OnMouseUp()
41.     {
42.         dragging = false;
43.  
44.         //finalAmountDragged = amountDragged;
45.     }
46.  
47.     // when dragging:
48.     private void Update()
49.  
50.     {
51.         if (dragging == true)
52.         {
53.  
54.             //find the distance between the dragStartingPoint and currentMousePosition and store in amountDragged variable
55.             amountDragged = Vector3.Distance(currentMousePosition, dragStartingPoint);
56.  
57.          
58.             // set minimum and maximum drag amount and store in clampedAmountDragged variable
59.  
60.             clampedAmountDragged = Mathf.Clamp(amountDragged, 100f, 300f);
61.  
62.             // set amountDragged to clampedAmount to apply minimum and maximum
63.  
64.             amountDragged = clampedAmountDragged;
65.  
66.                 temp = transform.localScale;
67.                 temp.x = amountDragged / 100;
68.                 temp.y = amountDragged / 100;
69.  
70.          
71.             //make scale of object equal to temp variable
72.             transform.localScale = temp;
73.  
74.        
75.  
76.         }
77.  
78.  
79.  
80.      
81.  
82.  
83.  
84.  
85.  
86.  
87.     }

 

I think I have to add a bool "hasBeenDragged" which will be made true if the amountDragged variable != 0 onMouseUp... and say in the update function, if hasBeenDragged = true && dragging = true - then this is the bit I'm struggling with. I need it to calculate the amountDragged based on the previous amount too but I cant get my head round how to write that.. Any help with the logic would be appreciated.

Thanks in advance.