[Paraview] HeadTracking in ParaView CAVE

[Aashish Chaudhary]

Hi Emiliano,

On Tue, Jan 29, 2013 at 1:07 PM, Emiliano Pastorelli
<hogancito at gmail.com> wrote:
> Hi Aashish, today i installed the master ParaView as you suggested.
>
> There is something wrong with the GUI for the VRPlugin, and now it's not
> possible to select anymore the type of the VR connection, not even importing
> a state file.

Did you compile with VRPN / VRUI ON? I am not sure if understood the
problem here.

 I solved that importing an older version of the plugin, with
> that it works, but so i don't know it the problems are fixed. (it took me a
> while to figure how to use the new FullScreen option but then i managed, i
> was trying to put it in the Server process)

We can put that in the sample VR file.

> Now somehow once in a while, even after applying the right transform matrix
> to the tracker data, i have the weird effect that once in a while, the axis
> seem to randomly invert. So if until a second before it was working fine
> with the headtracking around an object, suddenly it gets wrong on all the
> four axis. I don't know if it might be a problem of my tracker or is
> something in paraview.

I would believe that could be the problem on your tracker (depending
on how stable your tracker is).

> As a test, I saved a working system state, went out of paraview and when i
> restarted and restored the state, the axis were wrong again.
>
> As a side effect, there is a XGrabKeyboard command to remove in the vtk file
> vtkXOpenGLRenderWindow.cxx and if you don't remove it, when paraview is
> running fullscreen you can't use the keyboard anymore, nor in paraview nor
> in other applications.

This is something that came before. We will push a fix.

Thanks

>
> Best,
> Emiliano
>
> Il 28/01/13 23:43, Aashish Chaudhary ha scritto:
>
> On Mon, Jan 28, 2013 at 4:19 PM, Emiliano Pastorelli <hogancito at gmail.com>
> wrote:
>
>> Hi Aashish, perfect, thank you very much! I'll give it a try tomorrow, and
>> if it all works well i'll use it for a demonstration on wednesday, just in
>> time!
>
>
> Great. Let us know if we can help.
>
> Thanks,
>
>>
>>
>> Regards,
>> Emiliano
>>
>> Il 28/01/13 22:15, Aashish Chaudhary ha scritto:
>>
>> Hi Emiliano,
>>
>> I just wanted to let you know that recently we fixed couple of minor bugs
>> and now they are in ParaView master if you want to give it a try.
>>
>> Thanks
>>
>>
>> On Fri, Jan 11, 2013 at 12:47 PM, Aashish Chaudhary
>> <aashish.chaudhary at kitware.com> wrote:
>>>
>>>
>>>
>>> On Thu, Jan 10, 2013 at 9:00 AM, Emiliano Pastorelli
>>> <hogancito at gmail.com> wrote:
>>>>
>>>> Hi,
>>>>
>>>> I'm having some issues with headtracking in ParaView in a 3 screens
>>>> environment (2 walls + 1 table). From the GUI (and also from the config pvsm
>>>> file, but equal results) I tried to configure the following propertier
>>>> connected to the tracker.
>>>>
>>>> a) Camera Position ( I mentioned it in a previous message), the vrpn
>>>> server doesn't seem to feed the proper argument to the SetCamera function
>>>> and so it doesn't work.
>>>> b) View Position : when i start the vrplugin it gives me the following
>>>> message :
>>>> Generic Warning: In
>>>> /home/hogan/projects/ParaView/ParaViewCore/ServerManager/Core/vtkSMPropertyHelper.cxx,
>>>> line 429
>>>> Call not supported for the current property type.
>>>> And nothing happens.
>>>> c) EyeTransformMatrix : close to be working, but when i move my head
>>>> around the screens, the object doesn't move properly around the screens
>>>> (while if i just move the object with the mouse, it goes properly across the
>>>> three display, moving from one to another according to the position)
>>>> d) ModelTransformMatrix : works properly
>>>>
>>>> Which is the "official" procedure to do the headtracking? Am I doing
>>>> something wrong? The fact that it works properly with the
>>>> ModelTransformMatrix makes me think that the vrpn server that i wrote for
>>>> this tracker works properly, so i don't get what else i shall modify to
>>>> properly track the head movement.
>>>
>>>
>>> Connecting your sensor to the EyeTransformMatix is the right thing to do
>>> for the head tracking. Is it possible that your numbers are too small? When
>>> you move your head the position of the object may not move that much
>>> depending on your object is front of the projected plane or behind. If you
>>> can send me your config file, state file and what values you are getting
>>> from your sensor, I can provide you exact explanation.
>>>
>>> Thanks,
>>>
>>>
>>>>
>>>> Any hint is welcome before i go mad!
>>>> Best,
>>>> Emiliano
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>>>
>>>
>>>
>>>
>>> --
>>> | Aashish Chaudhary
>>> | R&D Engineer
>>> | Kitware Inc.
>>> | www.kitware.com
>>
>>
>>
>>
>> --
>> | Aashish Chaudhary
>> | R&D Engineer
>> | Kitware Inc.
>> | www.kitware.com
>>
>>
>
>
>
> --
> | Aashish Chaudhary
> | R&D Engineer
> | Kitware Inc.
> | www.kitware.com
>
>



-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com