public override void Pause()
{
// Disable all sensors when application is paused
accelerometerListener?.Disable();
gyroscopeListener?.Disable();
linearAccelerationListener?.Disable();
orientationListener?.Disable();
gravityListener?.Disable();
}
/// <summary>
/// Tries to create a sensor listener if it is supported
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public AndroidSensorListener TryGetSensorListener(SensorType type)
{
var listener = new AndroidSensorListener(type);
if (!listener.Enable())
{
listener.Dispose();
return(null);
}
listener.Disable();
return(listener);
}
public void UpdateSensorPair <TSensor>(AndroidSensorListener listener, TSensor sensor, Action <TSensor, AndroidSensorListener> updater) where TSensor : Sensor
{
if (listener != null)
{
bool enable = sensor.IsEnabled;
if (enable != listener.Enabled)
{
if (enable)
{
listener.Enable();
}
else
{
listener.Disable();
}
}
if (enable)
{
updater.Invoke(sensor, listener);
}
}
}
public override void Update()
{
base.Update();
var quaternionArray = new float[4];
var rotationMatrixArray = new float[9];
var yawPitchRollArray = new float[3];
// Update sensors
// Enable/disable supported sensors and update enabled sensors
UpdateSensorPair(accelerometerListener, accelerometerSensor,
(sensor, listener) => sensor.Acceleration = listener.GetCurrentValuesAsVector());
UpdateSensorPair(gyroscopeListener, gyroscopeSensor,
(sensor, listener) => sensor.RotationRate = -listener.GetCurrentValuesAsVector());
UpdateSensorPair(linearAccelerationListener, userAccelerationSensor,
(sensor, listener) => sensor.Acceleration = listener.GetCurrentValuesAsVector());
UpdateSensorPair(gravityListener, gravitySensor,
(sensor, listener) => sensor.Vector = listener.GetCurrentValuesAsVector());
// Enabled/Disable/Update Orientation
if (orientationListener != null)
{
bool enable = orientationSensor.IsEnabled || compassSensor.IsEnabled; // Orientation is used for compass as well
if (enable != orientationListener.Enabled)
{
if (enable)
{
orientationListener.Enable();
}
else
{
orientationListener.Disable();
}
}
if (enable)
{
// Update orientation
base.Update();
var rotationVector = orientationListener.GetValues()?.ToArray() ?? new [] { 0.0f, 0.0f, 0.0f };
if (rotationVector.Length < 3)
{
return;
}
SensorManager.GetQuaternionFromVector(quaternionArray, rotationVector);
SensorManager.GetRotationMatrixFromVector(rotationMatrixArray, rotationVector);
SensorManager.GetOrientation(rotationMatrixArray, yawPitchRollArray);
var quaternion = Quaternion.Identity;
quaternion.W = +quaternionArray[0];
quaternion.X = +quaternionArray[1];
quaternion.Y = +quaternionArray[3];
quaternion.Z = -quaternionArray[2];
quaternion = Quaternion.RotationY(MathUtil.Pi) * quaternion; // align the orientation with north.
orientationSensor.FromQuaternion(quaternion);
// Update compass
compassSensor.Heading = yawPitchRollArray[0] + MathUtil.Pi;
}
}
}