Anybody using sensors and changing orientation > 90deg?
On Jun 30, 4:31 pm, RS <[email protected]> wrote:
> Flinger source hasn't responded.. anybody who tried has any
> suggestions..
>
> Basically things work well in a single orientation.. its when
> orientation changes that things go on a toss.
> The horizontal component of pitch and roll get toggled at their
> extremes (+/-90 and +/-180).
> Workarounds apart is there a right way to get rotation matrix from
> sensors even when orientation changes along with everything else?
>
> Thanks in advance
> RS
>
> On Jun 21, 4:03 pm, RS <[email protected]> wrote:
>
> > Could somebody (Mathias Agopian alias pixelflinger perhaps) please
> > tell me how to use information fromsensorforaugmentedreality
> > stuff.
> > Sorry am not much into graphics stuff but I did try my part to figure
> > stuff out with help of documentation.
> > Didn't miss the note:
> > ""Note: It is preferable to use getRotationMatrix() in conjunction
> > with remapCoordinateSystem() and getOrientation() to compute these
> > values; while it may be more expensive, it is usually more accurate.
> > ""
>
> > Tried both. With the above method roll is always negative (in radians)
> > of the roll returned by orientationsensorevent. Not the real problem
> > though as these are in the same +/-90 range but negative/opposite.
> > One of these goes against the definition of roll in android
> > documentation.
>
> > I have the camera on landscape mode and did try with and without the
> > suggestion:
> > ""# Using the camera (Y axis along the camera's axis) for anaugmented
> > reality application where the rotation angles are needed :
> > remapCoordinateSystem(inR, AXIS_X, AXIS_Z, outR); ""
>
> > Yet no luck. Got a few lessons on quaternions etc. But am sure it is
> > much easier than the mess am getting into.
>
> > Say, orientationsensorevent returns yaw, pitch & roll in say eO[]
> > What are the next steps to get rotation matrix that I could use in
> > opengl to rotate aaugmentedscene overlapping the camera preview?
>
> > Thanks and regards
> > RS
>
> > ps:
> > I have used Matrix.setRotateEulerM (m, eO[0], eO[1], eO[2]); // tried
> > with negatives too.
> > I have also tried other events (eA and eM) to eO through;
> > SensorManager.getRotationMatrix(mR, mI, eA, eM);
> > and then remap as suggested etc.
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