Hi Victor,
Victor Haefner wrote:
> Hi all,
>
> I am using OpenSG on a Powerwall, headtracking with Dtrack.
>
> The tracking data consist of the location of the tracked object and the
> rotation matrix
>
> I use the Projectioncamera, the problem is that when headtracking is used,
> the image does "flimern", "flackern" ..I am not sure how to say this in
> english, hope some of you speak german :P
Actually most of the core team does. ;) And the word is flicker.
> It s not a continuous effect, it seems like at some frames, the camera
> position is set to somewhere completly else..
>
> I narrowed it down to the rotation matrix from the tracking
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.
> 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)?
> the tracking data seems to be ok, no inf or NAN values
>
> the determinant is ok
>
> moving a tracked object with a stick for example looks perfect
>
> ..so my question is, does anyone had a similliar problem? could it be the
> projection cam? (I dont think so.. but it is realy difficult to rule it out)
>
> I don't expect anyone to help me if it is related to DTrack.. but asking
> doesn't hurt :P
Not really a clue, honestly. If the matrices are ok and invertible things
should
work just fine.
In practice I think you can probably get away with just using the translation
and ignored the rotation, as the effect is really minimal. But I would be
curious what the problem here is...
Yours
Dirk
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