Fix scrollwheel in beachdemo

samples/beachdemo/beachdemo.js

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 402 matching lines @@
  * Hander for the scroll wheel.
  * @param {Event} e Mouse event.
  */
 function onWheel(e) {
   if (e.deltaY) {
     var target = g_camera.minFieldOfView;
     if (e.deltaY < 0) {
       target = g_camera.maxFieldOfView;
     }
 
-    g_camera.fieldOfView = g_math.lerpVector(target, g_camera.fieldOfView, 0.9);
+    g_camera.fieldOfView = g_math.lerpScalar(target, g_camera.fieldOfView, 0.9);
 
     updateProjection();
     stopAnimatedCamera();
   }
 }
 
 // *************************** Keyboard functions ******************************
 
 /**
  * Tracks key down events.
@@ skipping 2220 matching lines @@
 
 /**
  * Removes any callbacks so they don't get called after the page has unloaded.
  */
 function uninit() {
   if (g_client) {
     g_client.cleanup();
   }
 }