you can use drag code , and put a scale function
, here is the code how you can use the drag function in your script , now just put a scaling funtion like
(http://docs.unity3d.com/ScriptReference/Vector3.Scale.html)
using UnityEngine;
using System.Collections;
public class Drag2 : MonoBehaviour {
private float dist;
private bool dragging = false;
private Vector3 offset;
private Transform toDrag;
void Update() {
Vector3 v3;
if (Input.touchCount != 1) {
dragging = false;
return;
}
Touch touch = Input.touches[0];
Vector3 pos = touch.position;
if(touch.phase == TouchPhase.Began) {
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay(pos);
if(Physics.Raycast(ray, out hit) && (hit.collider.tag == "Draggable"))
{
Debug.Log ("Here");
toDrag = hit.transform;
dist = hit.transform.position.z - Camera.main.transform.position.z;
v3 = new Vector3(pos.x, pos.y, dist);
v3 = Camera.main.ScreenToWorldPoint(v3);
offset = toDrag.position - v3;
dragging = true;
}
}
if (dragging && touch.phase == TouchPhase.Moved) {
v3 = new Vector3(Input.mousePosition.x, Input.mousePosition.y, dist);
v3 = Camera.main.ScreenToWorldPoint(v3);
toDrag.position = v3 + offset;
}
if (dragging && (touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled)) {
dragging = false;
}
}
}
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