Hi everyone:
I wanna translate the return values of Sensor.TYPE_ACCELEROMETER to
the world coordinate system,I did this in this way:
public void onSensorChanged(SensorEvent event) {
if (event.accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE)
return;
switch (event.sensor.getType()) {
case Sensor.TYPE_MAGNETIC_FIELD:
mags = event.values.clone();
break;
case Sensor.TYPE_ACCELEROMETER:
accels = event.values.clone();
break;
case Sensor.TYPE_ORIENTATION:
orent = event.values.clone();
break;
}
if (mags != null && accels != null) {
SensorManager.getRotationMatrix(inR, I, accels, mags);
for(int k=0;k<3;k++) {
a[0] =
accels[0]*inR[0]+accels[1]*inR[1]+accels[2]*inR[2];//ax
a[1] =
accels[0]*inR[3]+accels[1]*inR[4]+accels[2]*inR[5];//ay
a[2] =
accels[0]*inR[6]+accels[1]*inR[7]+accels[2]*inR[8];//az
....
}
But I find I move the phone in any direction the ax and ay will all be
0,and the az is some value I can't understand, so is any body meet the
same problem,or the return matrix of the getrotationmatrix() is really
inaccurate when there is another accelerate besides g(gravity) so I
can translate the accelerate in this way.
any help will be very appreciated.
Saka
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