Adding zoom on scrollwheel event to Pool demo.

samples/o3d-webgl-samples/texturesamplers.html

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@@ skipping 56 matching lines @@
 var g_pack;
 var g_viewInfo;
 var g_eye;
 var g_target;
 var g_up;
 var g_finished = false;  // for selenium testing
 
 function scrollMe(e) {
   g_eye = g_math.mulScalarVector((e.deltaY < 0 ? 11 : 13) / 12, g_eye);
   g_viewInfo.drawContext.view = g_math.matrix4.lookAt(g_eye, g_target, g_up);
-  // Prevents event from reaching up to the window, e.g. so page will not scroll
-  o3djs.event.cancel(e);
 }
 
 /**
  * Creates the client area.
  */
 function init() {
   o3djs.webgl.makeClients(initStep2);
 }
 
 /**
@@ skipping 176 matching lines @@
 
 /* Given the texture coordinates, our pixel shader grabs the corresponding
  * color from the texture.
  */
 void main() {
   gl_FragColor = texture2D(texSampler, texCoord);
 }
 </textarea>
 </body>
 </html>