[Paraview] Using VR-Style input devices, analog input from 3Dconnexion device

[Christian Richter]

Hi Aashish,

this week I've written a new Interactor style to use a 3dconnexion 
SpaceNavigator in Paraview with vrpn server. Translational motion works 
fine in parallel and orthogonal projection but rotation is not finished yet.

Two things I did not solve:
- the first time a new Interaction is created, PV crashes when the point 
vtkVRQueue:Enqueue, this->Mutex->Lock() is reached (called by 
newAnalogValue), if I use "Restore State" it works -> I think anything 
has to be initialized but did not find it.
- rotation of the scene is confusing to me. I have as input 3 analog 
values (roll/pitch/yaw) between -1 and +1. I tried to map this to 
CameraViewUp with euler-zyx-Transformation. But it does not work as 
expected.

Question at all: what would be the best way to map a scalar value to the 
rotation of a scene/view ? What does the buttons roll/pitch/yaw in the 
camera-property-menue ? I think I would need exact the same functions 
behind theses 3 buttons.

Here is the code-snippet I tried for that:

     vtkSMPropertyHelper( proxy, "CameraViewUp" ).Get( rot, 3 ); //rotation
     phi= data.data.analog.channel[3]*M_PI/180;
     theta= data.data.analog.channel[4]*M_PI/180;
     psi= data.data.analog.channel[5]*M_PI/180;

      double x=rot[0];
      double y=rot[1];
      double z=rot[2];

      double tt[3][3];
      tt[0][0]=cos(theta)*cos(psi);
  tt[0][1]=-cos(phi)*sin(psi)+sin(phi)*sin(theta)*cos(psi);
  tt[0][2]=sin(phi)*sin(psi)+cos(phi)*sin(theta)*cos(psi);

      tt[1][0]=cos(theta)*sin(psi);
  tt[1][1]=cos(phi)*cos(psi)+sin(phi)*sin(theta)*cos(psi);
  tt[1][2]=-sin(phi)*cos(psi)+cos(phi)*sin(theta)*sin(psi);

      tt[2][0]=-sin(theta);
      tt[2][1]=sin(phi)*cos(theta);
      tt[2][2]=cos(phi)*cos(theta);

      rot[0] = x*tt[0][0]+y*tt[0][1]+z*tt[0][2];
      rot[1] = x*tt[1][0]+y*tt[1][1]+z*tt[1][2];
      rot[2] = x*tt[2][0]+y*tt[2][1]+z*tt[2][2];

      vtkSMPropertyHelper( proxy, "CameraViewUp" ).Set( rot, 3 );

I attached the sourcecode, maybe someone has time over christmas to have 
a look.

Have a nice Christmas time & happy new year,
Christian

Am 30.11.2012 03:42, schrieb Aashish Chaudhary:
> Hi Christian,
>
> Are you still interested? if yes, let me know and I can provide you 
> more help.
>
> Thanks,
>
>
> On Tue, Nov 6, 2012 at 11:34 AM, Christian Richter 
> <christian.richter at ovgu.de <mailto:christian.richter at ovgu.de>> wrote:
>
>     ell me how to write a styl
>
>
>
>
> -- 
> | Aashish Chaudhary
> | R&D Engineer
> | Kitware Inc.
> | www.kitware.com <http://www.kitware.com>

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