large stl problem in IE9

[GoogleCodeExporter]

What steps will reproduce the problem?
1.
you focus the attention about test_ie_compatible.html Demo
2.
you (for example) overwrite hard_milk.stl original model with one of the 2 
files here in attachments (if you do not want to change js code). 
3.
you run demo test and select hard_milk.stl

What is the expected output? What do you see instead?

internet explorer 9 or 10(preview) doesn't show anything and remains waiting lo 
load stl file. 

What version of the product are you using? On what operating system?
I use the latest  jsc3d 0.9.8 version on windows7 32 bit.

Please provide any additional information below.

In Chrome everything is perfect and I can see these 2 file in attachments. But 
in ie9 or 10 I cannot visualize them.
Is there any idea?
In ie9 it seems I may visualize stl file only if their size is small (200k or 
similar)

Original issue reported on code.google.com by mariopon...@gmail.com on 20 Nov 2012 at 10:42

Attachments:

• hard_milk.stl
• hard_milk_piede5M.stl

[GoogleCodeExporter]

The latest release of jsc3d.js (0.9.8) does not support binary stl format in 
IE9. This is because loading binary data using IE9's implementation of 
XmlHttpRequest is very inefficient. 

jsc3d_ie.js once implemented this using a snippet of vbscript to transcode the 
binary content of an stl file into a javascript array then read model from it 
(for more technical details, see 
http://code.google.com/p/jsc3d/source/browse/trunk/jsc3d/jsc3d_ie.js#4221). But 
this seems to cost too long for transcoding and will even lock the page for a 
while. So this method is not merged to jsc3d.js.

The good news is that IE10 makes promising enhancement on XHR's binary data 
access. I'm just looking into IE10's dev docs and re-writing that part.  All 
will be in next release.

Original comment by Humu2...@gmail.com on 20 Nov 2012 at 3:11

[GoogleCodeExporter]

really thanks, however by now i solved by installing the chrome framework on 
ie9 or ie10 and all is perfect!!

Original comment by mariopon...@gmail.com on 20 Nov 2012 at 3:49

[GoogleCodeExporter]

Hi i've found a way in order to convert in fast and efficient way a bynary file 
to array obect on IE9.

JSC3D.StlLoader.prototype.loadBinaryFromUrl = function (urlName) {

   var self = this;
   var xhr = window.XMLHttpRequest ? new XMLHttpRequest : new ActiveXObject('MSXML2.XMLHTTP.3.0');
   xhr.open('GET', urlName, true);
   var browserName = navigator.appName; 

   xhr.responseType = "arraybuffer";

   xhr.onreadystatechange = function () {
      if (xhr.readyState == 4) {

               var scene = new JSC3D.Scene;

               try {

                  var bytes = VBArray(xhr.responseBody).toArray(); // Only on IE!

                  self.parseStlBinary(scene, bytes);

               } catch (e) { }
               self.onload(scene);

      }
   };

   xhr.send();
};

it seems this command :

 var bytes = VBArray(xhr.responseBody).toArray(); 

works perfect in IE, i tested in IE9 with very large binary stl Files.

Give me your opinion if you like

hello, Mario

Original comment by mariopon...@yahoo.it on 19 Dec 2012 at 3:01

[GoogleCodeExporter]

Nice solution! It runs surprisingly fast in IE10, but does not seem to work in 
IE9 for the nonsupport of 'arraybuffer' response type.  I will add this to the 
next release of JSC3D to enable STL loader for IE10. 

Really thanks, Mario!

Original comment by Humu2...@gmail.com on 21 Dec 2012 at 10:01

[GoogleCodeExporter]

thanks to you, it's a pleasure for me to learn js by looking at your code!
But it should work on IE9 too. I use IE9 32 bit on windows 7 32 bit.

Hello, Mario

Original comment by mariopon...@gmail.com on 21 Dec 2012 at 10:45

[GoogleCodeExporter]

Mario,
I am too trying to find a way round the ie9 problem. Did your solution work 
with ie9 or was the support guy right with the array issue?

Original comment by undercut...@gmail.com on 24 Mar 2013 at 9:05

[GoogleCodeExporter]

[deleted comment]

[GoogleCodeExporter]

The latest edition already provides support for loading STL binary and ascii 
files on IE9. Please get it from the repository. 

I'll release a new download package soon.

Original comment by Humu2...@gmail.com on 31 Jul 2013 at 2:29