Thanks, that seems to work, the orientation is now relative to the
earth.  The documentation could use a little work...

  mike

On Aug 20, 7:08 pm, mscwd01 <mscw...@gmail.com> wrote:
> Oh and you'll need these:
>
> final int matrix_size = 16;
> float[] R = new float[matrix_size];
> float[] outR = new float[matrix_size];
> float[] I = new float[matrix_size];
> float[] values = new float[3];
>
> On Aug 21, 3:06 am, mscwd01 <mscw...@gmail.com> wrote:
>
>
>
> > Heres my code, which works:
>
> > public void onSensorChanged(SensorEvent event) {
>
> >         Sensor sensor = event.sensor;
> >         int type = sensor.getType();
> >         switch (type) {
> >                 case Sensor.TYPE_MAGNETIC_FIELD:
> >                         mags = event.values.clone();
> >                         isReady = true;
> >                     break;
> >                 case Sensor.TYPE_ACCELEROMETER:
> >                     accels = event.values.clone();
> >                     break;
> >                 case Sensor.TYPE_ORIENTATION:
> >                     orients = event.values.clone();
> >                     break;
> >             }
>
> >             if (mags != null && accels != null && isReady) {
> >                 isReady = false;
>
> >                     SensorManager.getRotationMatrix(R, I, accels, mags);
> >                     SensorManager.remapCoordinateSystem(R,
> > SensorManager.AXIS_Y, SensorManager.AXIS_MINUS_X, outR);
> >                     SensorManager.getOrientation(outR, values);
>
> >                                 azimuth = 
> > getAzimuth(-convert.radToDeg(values[0]));
> >                                 pitch= convert.radToDeg(values[1]);
> >                                 roll = -convert.radToDeg(values[2]);
>
> >             }
>
> >         }
>
> > On Aug 21, 2:39 am, Mike Collins <mike.d.coll...@gmail.com> wrote:
>
> > > I have a sensor event handler that gets fired and I have no problem
> > > getting and processing acceleration readings. However this code
> > > always fails.
>
> > >                 if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
> > >                 {
> > >                         float[] geomagnetic = new float[3];
> > >                         geomagnetic[0] = geomagnetic[1] = geomagnetic[2] 
> > > = 0;
>
> > >                         float[] r = new float[9];
> > >                         float[] I = new float[9];
> > >                         boolean b = SensorManager.getRotationMatrix(r, I, 
> > > event.values.clone
> > > (), event.values.clone());
> > >                         if ( ! b)
> > >                         {
> > >                                 Log.e(LOG_TAG, "getRotationMatrix 
> > > failed");
> > >                                 return;
> > >                         }
> > > ...
>
> > > tia,
> > >   mike
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