[vtkusers] General Question to VTK in VR

[Jamil Goettlich]

That is all really great information, thank you so much!

Jamil

2018-04-06 20:46 GMT+02:00 Sgouros, Thomas <thomas_sgouros at brown.edu>:

> I'm sure the preceding answers to the question will be more than enough to
> satisfy the OP, but there is yet another way, a project called MinVR that
> is in alpha, but is meant to be a generic and relatively straightforward
> way to convert any old 3D graphics program to VR, and that is compatible
> with a wide range of displays, including head-mounted displays like the
> Oculus and HTC, caves, desktop VR displays, and regular laptop and desktop
> screens. I'm working on vtk examples now to illustrate its use with vtk,
> not that I'm all that fluent in that dialect. This is a joint project of
> people at UMinn and Brown University, and can be found at github.com/MinVR
> .
>
>  -Tom
>
> On Fri, Apr 6, 2018 at 11:05 AM, Andras Lasso <lasso at queensu.ca> wrote:
>
>> > Is there anybody who has displayed unsteady states with VTK in VR and
>> if so what method was used and how was that done?
>>
>>
>>
>> Yes! 3D Slicer has an awesome VR viewer. With a single click, the 3D
>> scene appears in your headset and the application remains fully interactive
>> – you can manipulate objects both on the desktop using keyboard and mouse,
>> and using VR controllers in the VR view. You can also view dynamic content,
>> such as 4D volumes even using volume rendering.
>>
>>
>>
>> The source code is available here: https://github.com/KitwareMedi
>> cal/SlicerVirtualReality. You should be able to find all the
>> implementation details there.
>>
>>
>>
>> To try it: Download a recent Slicer nightly version (
>> https://download.slicer.org), install SlicerVirtualReality extension
>> from Slicer’s extension manager. After you loaded your data you just need
>> to click the VR headset button on the toolbar (“Show scene in virtual
>> reality”).
>>
>>
>>
>> Limitations: There is a bug in volume rendering that clips the volume at
>> unexpected locations (Kitware is working on a fix, expected to be ready
>> soon). Position of objects that are moved using VR controllers are not yet
>> synchronization back to the scene displayed in the main window (this is the
>> next focus of development).
>>
>>
>>
>> Andras
>>
>>
>>
>>
>>
>> *From:* vtkusers <vtkusers-bounces at vtk.org> *On Behalf Of *Jamil
>> Goettlich
>> *Sent:* Friday, April 6, 2018 10:46 AM
>> *To:* vtk <vtkusers at vtk.org>
>> *Subject:* [vtkusers] General Question to VTK in VR
>>
>>
>>
>> Hello VTK Users,
>>
>>
>>
>> I have some general questions to the current state of VR in VTK. Please
>> let me know if this is not the right place to ask questions about that.
>> According to what I have read (among others "Enhancements to VTK enabling
>> scientific visualization in immersive environments") there are two
>> favourized ways of bringing VTK into VR:
>> - VR-Toolkit embedding --> Using VTK with the OpenVR API (HMDs)
>>
>> - OpenGL context sharing (VTK Rendering External) --> Using existing
>> contexts from other (VR-)Toolkits (Multiple devices)
>>
>>
>>
>> Until now I have only seen single frames being displayed in VR (in VTK
>> as well as in Paraview), not unsteady state (e.g. in ParaView 5.3,
>> OpenVR version, I cannot press the play button and send the content to
>> OpenVR, I can only see one frame on the HMD).
>>
>> From what I have seen so far, the VR-Plugin of ParaView does not use any
>> of the two methods. They are using the library VRPN for interacting but all
>> the rest is done within ParaView.
>>
>>
>>
>> My questions are the following:
>>
>> - Is there anybody who has displayed unsteady states with VTK in VR and
>> if so what method was used and how was that done?
>>
>> - Is there any paper or detailled documentation to the OpenGL context
>> sharing method? I did not find alot to that except from the testing example
>>
>> "TestGLUTRenderWindow.cxx" which I was not able to build properly until
>> now. Also, if anyone has experience using FreeVR with VTK OpenGL context
>> sharing method, I would be very interested in that too.
>>
>> I hope my questions are appropriate (and not too widespread) and I would
>> be very happy to be pointed to some current sources, especially concerning
>> unsteady state simulations with VTK in VR. I would be very happy for anyone
>> to share their own experiences or some current papers to that topic.
>>
>>
>>
>> Thanks alot,
>>
>>
>>
>> Jamil
>>
>>
>>
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