camera zooming in unity
using UnityEngine;
using System.Collections;
public class MouseWheelZoom : MonoBehaviour {
float curZoomPos, zoomTo; // curZoomPos will be the value
float zoomFrom = 20f; //Midway point between nearest and farthest zoom values (a "starting position")
void Update ()
{
// Attaches the float y to scrollwheel up or down
float y = Input.mouseScrollDelta.y;
// If the wheel goes up it, decrement 5 from "zoomTo"
if (y >= 1)
{
zoomTo -= 5f;
Debug.Log ("Zoomed In");
}
// If the wheel goes down, increment 5 to "zoomTo"
else if (y >= -1) {
zoomTo += 5f;
Debug.Log ("Zoomed Out");
}
// creates a value to raise and lower the camera's field of view
curZoomPos = zoomFrom + zoomTo;
curZoomPos = Mathf.Clamp (curZoomPos, 5f, 35f);
// Stops "zoomTo" value at the nearest and farthest zoom value you desire
zoomTo = Mathf.Clamp (zoomTo, -15f, 30f);
// Makes the actual change to Field Of View
Camera.main.fieldOfView = curZoomPos;
}