[vtkusers] Stream the output of vtkrenderwindow to a HTML5 browser
Mengda Wu
wumengda at gmail.com
Sun Nov 15 15:38:03 EST 2015
Hi Sebastien,
Thanks a lot for your reply. I just tried vtk-web with the Cone
application. But I got some errors when I tested. I used Python 2.7.7 and
VTK 6.3.0. I am not sure what's wrong.
C:\Library\VTK\VTK-6.3.0\Build\bin\Release>.\vtkpython.exe
C:\Library\VTK\VTK-6.
3.0\Build\Wrapping\Python\vtk\web\vtk_web_cone.py --content
C:\Library\VTK\VTK-6
.3.0\Build\www\ --port 3800
2015-11-15 15:35:00-0500 [-] Log opened.
2015-11-15 15:35:01-0500 [-] Site starting on 3800
2015-11-15 15:35:01-0500 [-] Starting factory <twisted.web.server.Site
instance
at 0x0000000003E47F48>
2015-11-15 15:35:09-0500 [HTTPChannel,0,127.0.0.1] Unhandled Error
Traceback (most recent call last):
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\protocols
\basic.py", line 571, in dataReceived
why = self.lineReceived(line)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
py", line 1656, in lineReceived
self.allContentReceived()
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
py", line 1731, in allContentReceived
req.requestReceived(command, path, version)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
py", line 827, in requestReceived
self.process()
--- <exception caught here> ---
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
r.py", line 189, in process
self.render(resrc)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
r.py", line 238, in render
body = resrc.render(self)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\resou
rce.py", line 250, in render
return m(request)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\stati
c.py", line 631, in render_GET
producer.start()
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\stati
c.py", line 710, in start
self.request.registerProducer(self, False)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
py", line 873, in registerProducer
self.transport.registerProducer(producer, streaming)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\internet\
abstract.py", line 112, in registerProducer
producer.resumeProducing()
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\stati
c.py", line 720, in resumeProducing
self.request.write(data)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
r.py", line 217, in write
http.Request.write(self, data)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
py", line 1002, in write
value = networkString('%s' % (value,))
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\python\co
mpat.py", line 364, in networkString
raise TypeError("Can only pass-through bytes on Python 2")
exceptions.TypeError: Can only pass-through bytes on Python 2
2015-11-15 15:35:09-0500 [HTTPChannel,0,127.0.0.1] Unhandled Error
Traceback (most recent call last):
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
r.py", line 321, in processingFailed
% webutil.formatFailure(reason))
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\util.
py", line 425, in formatFailure
flattenString(None,
FailureElement(myFailure)).addBoth(result.append
)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
ten.py", line 420, in flattenString
d = flatten(request, root, io.write)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
ten.py", line 402, in flatten
_writeFlattenedData(state, write, result)
--- <exception caught here> ---
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
ten.py", line 359, in _writeFlattenedData
element = state.next()
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
ten.py", line 326, in _flattenTree
raise FlattenerError(e, roots, extract_tb(exc_info()[2]))
twisted.web.error.FlattenerError: Exception while flattening:
<twisted.web.util.FailureElement object at 0x0000000003ED3240>
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
ten.py", line 317, in _flattenTree
element = stack[-1].next()
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
ten.py", line 286, in _flattenElement
result = root.render(request)
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_elem
ent.py", line 184, in render
return loader.load()
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\templ
ate.py", line 465, in load
self._loadedTemplate = self._loadDoc()
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\templ
ate.py", line 446, in _loadDoc
f = self._path.open('r')
File
"C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\python\fi
lepath.py", line 828, in open
return open(self.path, mode + 'b')
IOError: [Errno 2] No such file or directory:
'C:\\Library\\VTK\\VTK-6.3
.0\\Build\\Wrapping\\Python\\twisted\\web\\failure.xhtml'
Thanks,
Guanglei
On Sat, Nov 14, 2015 at 11:33 AM, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:
> Hi Mengda,
>
> I guess it depend what kind of data you want to stream.
> VTK web is already doing that by sending images through Websockets.
> There is even an option that will send the scene geometry which will let
> you interact with the scene locally inside your browser.
>
> There is several example in the VTK repository that show how to setup a
> server with a basic VTK application.
>
> Seb
>
> On Fri, Nov 13, 2015 at 12:46 PM, Mengda Wu <wumengda at gmail.com> wrote:
>
>> Hi vtkusers,
>>
>> I am thinking to stream the output of vtkrenderwindow to a HTML5
>> browser. I hope to do an offscreen rendering on the server and stream it
>> to a HTML5 browser on the client. Is this possible?
>>
>> Thanks,
>> Mengda
>>
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