[vtkusers] WebGL 3D Viewer Demo

[Sathish Kumar]

Hi Sebastien,

Actually I pointed my previous mail to sebastien.valette at creatis.insa-lyon.fr.

Anyway your mail helped me a lot to understand the features of Paraviewweb.
Actually I am very much interested on Paraviewweb. But the installation is little bit tricky.
Can you suggest an easy way to install Paraviewweb (server and client) on my system? (Linux Mint 10)

Thanks,
Sathish

On Tuesday 10 January 2012 06:55 PM, Sebastien Jourdain wrote:
> Hi Sathish,
>
> ParaViewWeb has been designed for remote rendering in order to achieve
> interactive framerate on the client with collaborative session. In
> that way, we extended it to support geometry delivery as well using
> webgl technology. But because, it was in a dynamic context (dynamic
> filter/dynamic output) we could not rely on a files and we had to make
> sure that the client/server communication should stay at low as
> possible.
> Therefore, we defined a binary format that could be used 'as-is'
> inside webgl. But as js/webgl has some limitation in array size, the
> whole scene get split based on that maximum array size regarding which
> array are needed to render it. Therefore, for large scene we end up
> with a set of pieces that get loaded one after the other which allow
> the user to see the scene to grow under their eyes.
>
> But as you can see this rely on a dynamic mechanism which update the
> client as soon as the data has changed on the server side. In case of
> static data observation, the system is kind of overkill. So what we
> did was to add an extra feature that allow the ParaViewWeb user to
> export its scene as a single html file that embed the geometry pieces
> and the webgl code that will render it inside the browser. Basically
> you end up with a single HTML file that represent a 3D scene that
> don't need any plugin to render and see it. And that's the links that
> I've previously send. Those links are simple export of interactive
> session done through ParaViewWeb.
>
> And finally except for those static files, ParaViewWeb always deals
> with runtime 3D data.
> Regarding, the data size, they are pretty small as I remember, it's
> basically the sample file given inside ParaView or VTK data. But
> ParaViewWeb has been designed to handle much larger case as it could
> rely on cluster to do the 3D processing if needed. Although, if you
> are using the WebGL renderer, you will be limited by your web browser.
>
> Seb
>
> On Tue, Jan 10, 2012 at 3:06 AM, Sathish Kumar<kingvsk at aol.com>  wrote:
>> Hi Sebastien,
>>
>> Nice work. I am very much interested to get some feedback about your
>> experience.
>>
>> Are you splitting the 3D data into multiple files?
>> What is the size of 3D data file?
>> Is the 3D constructed at runtime?
>>
>> Thanks,
>> Sathish
>>
>>
>>
>> On Monday 09 January 2012 07:11 PM, Sébastien Valette wrote:
>>
>> Hi Sathish,
>>
>> interesting webpage! It's good to finally see webGL stuff reaching the VTK
>> ecosystem! We also have developed something in our lab, see:
>>
>> http://www.creatis.insa-lyon.fr/~valette/epaule/
>>
>> it is a primitive simultaneous visualization of IRM slices and extracted
>> parts of bones and lung. We've been doing this ourselves as there was no
>> practical library to do that at that time.
>>
>> Greetings,
>>
>> Sebastien
>>
>>
>> Le 06/01/2012 05:49, Sathish Kumar a écrit :
>>
>> One of the features planned for Oviyam-5 is to view 3D images from a DICOM
>> series and without a plugin using WebGL. We've just taken the first steps
>> towards reaching that goal.
>>
>> A technology preview with pre-rendered images is available at this link. Be
>> patient while loading the 3D models, it may take few minutes to load.
>>
>> Technologies used: VTK, HTML5, WebGL, JSON, Javascript, JS-Unzip...
>>
>> Features:
>> 1. Plugin-Free Design.
>> 2. Supports all major modern browsers like Chrome, Firefox, Safari and
>> Opera.(Use the latest versions available.The best performance is with Chrome
>> and Firefox.
>> 3. Supports IPhone, IPad and Android devices. However, due to the lack of
>> memory, only the cube demo works at present
>> 4. Load upto 36 MB of JSON 3D Data (Supports nearly 150 instances/slices).
>> 5. Zoom In/Out Option.
>> 6. Pan Option.
>> 7. One click Axial, Coronal, Sagittal Views.
>> 8. 2D Rotation.
>> 9. 3D Rotation.
>>
>> Upcoming features:
>> 1. Data Compression(Zip/Unzip) support for faster data transfer.
>> 2. Support for Handheld devices.
>> 3. Look-Up Table to get colour.
>> 4. Support for user-defined models.
>>
>> Source:
>> http://forums.dcm4che.org/jiveforums/thread.jspa?threadID=4233&tstart=0
>>
>> Regards,
>> Sathish
>>
>>
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