> Victor Haefner wrote:
> > I use the Projectioncamera,
>
> just to make sure, do you mean ProjectionCameraDecorator? Is the surface
> you are projecting on tracked? Otherwise you probably only want a
> StereoCameraDecorator and pass the tracking matrix to the camera's beacon.
>
> I use the ProjectionCameraDecorator, I give the 4 corners of my screen, the
userbeacon gets the tracking data from the tracked head (googles) in the
local rooms frame.
it does work quite good I think, just the flickering..
> do you even need the rotation for head tracking ?
>
I need it for the correct stereo effect, but I could try to do that myself,
but I fear to get into the same problem again.. because in any case I need
the rotation of the tracking..
>
> > turning the user beacon with a function works perfect, no problems..
> > using only the tracked position also works perfect
> >
> > the tracking data seems to be ok, no inf or NAN values
> > the determinant is ok
>
> have you looked at the rotation matrix at the instant when you notice
> the flickering? does it deviate from the matrices you see before/after?
> perhaps in one case the rotation is described as (x,y,z, alpha) and in
> the other case as (-x,-y,-z,-alpha) ?
>
>
> this is a litle difficult.. there are a lot of matrices.. and every matrix
looks different.. I will try to find a way to take matrices out which
deviate a lot (right now no clue how I could do this, any ideas?).
> As Carsten already indicated, for a tracked screen the rotations is only
> used to
> calculate the left/right eye positions, so the effect of the rotation
> matrxi
> should be pretty minimal.
>
> hmm, what do you mean by tracked screen? we have a static screen in our
room, it doesnt move, the user is moving in front
> > turning the user beacon with a function works perfect, no problems..
> > using only the tracked position also works perfect
>
> That's a little surprising, see above. What are your setting on teh
> ProjectionDecorator (corners, eye separation)?
>
> my setup is quite simple, 6 cm eye separation, the 4 corners of the screen
in the order: left_down right_down right_up left_up
I will try to narrow it down further, but I don't realy have any hint on
where to start digging, my only options left require quite some amount of
coding, at least for me :P ..so if you have some brilliant idea.. :D
thanks for your time :)
Victor
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