/// <summary>
/// Create a gesture detector that changes the volume when the hand is rotated along the Z axis
/// </summary>
public static ContinuousGestureDetector RotateHandChangeVolumeGesture()
{
return(new ContinuousGestureDetector(
// Only allow rotation if hand is closed and visible for a bit
hand => !hand.IsOpen && hand.TimeVisible >= 500 * 1000,
// Track hand roll (angle along Z axis) in radians, from 0 to 2PI
delegate(HandStats hand) {
if (hand.Roll >= 0)
{
return hand.Roll;
}
// Transform the -PI to 0 space to be from PI to 2 * PI
return (float)(Math.PI * 2 + hand.Roll);
},
// Trigger every 0.35 radians / 20 degrees
0.35f,
// Increase volume if rotating clockwise
delegate(bool isPositive) {
if (isPositive)
{
VolumeUtil.VolumeUp();
}
else
{
VolumeUtil.VolumeDown();
}
})
{
DirectionDebounceTime = 500 * 1000
});
}
public void VolumeConversion()
{
for (double x = 0d; x < 1000d; x += 0.00123d)
{
double result = VolumeUtil.DecibelToLinear(VolumeUtil.LinearToDecibel(x));
Debug.WriteLine("{0}: L2D={1} -> {2}", x, VolumeUtil.LinearToDecibel(x), result);
Assert.AreEqual(x, result, 0.000001d);
}
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value == null || !(value is double))
{
return(double.NaN);
}
// decibel to linear
return(VolumeUtil.DecibelToLinear((double)value));
}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value == null || !(value is double))
{
return(double.NaN);
}
// linear to decibel
return(VolumeUtil.LinearToDecibel((double)value));
}
/// <summary>
/// Create a gesture detector that changes the volume when the hand is moved left and right (along the X axis)
/// </summary>
public static ContinuousGestureDetector MoveHandXChangeVolumeGesture()
{
return(new ContinuousGestureDetector(
// Only acknowledge hand if it's visible for a bit first
hand => hand.TimeVisible >= 500 * 1000,
// Track lateral hand movement along long axis of Leap
hand => hand.PalmPosition.x,
// Trigger every 30 millimeters
30,
// Increase volume if moving right
delegate(bool isPositive) {
if (isPositive)
{
VolumeUtil.VolumeUp();
}
else
{
VolumeUtil.VolumeDown();
}
}));
}
