Universal Windows® Apps with XAML and C# Unleashed

Tossing Motion

The following handler for Accelerometer’s ReadingChanged event contains a simple algorithm for detecting a tossing motion, such as pretending to flip a coin in the air (except in this case, the coin is the device):

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// Process data coming from the accelerometer void OnReadingChanged(Accelerometer sender,                       AccelerometerReadingChangedEventArgs e) {   // We want the threshold to be negative, so   // forward motion is up and out of the screen   double threshold = -1;   // Only pay attention to large-enough magnitudes in the Z dimension   if (Math.Abs(e.Reading.AccelerationZ) < Math.Abs(threshold))     return;   // See if the force is in the same direction as the threshold   // (forward ...