I must be dense but can't seem to make the documentation around this make sense. I can compute the phone orientation in earth-relative coordinates but can't figure out how to get the phone-relative acceleration values expressed in the earth coordinate system.
I tried multiplying the rotation matrix by the acceleration vector and also remapped rotation matrix... Any thoughts? On Aug 21, 11:07 am, Mike Collins <[email protected]> wrote: > 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
