private void Knob_MouseUp(object sender, MouseButtonEventArgs e)
{
sb.Begin();
knobPosition.X = 0;
knobPosition.Y = 0;
Window parentWin = Window.GetWindow(this);
_vm = ((MainWindow)Application.Current.MainWindow).getVM();
_vm.FlyPlane(0, 0);
UIElement element = (UIElement)Knob;
element.ReleaseMouseCapture();
}
private void Knob_MouseMove(object sender, MouseEventArgs e)
{
double slope, absX, absY;
if (e.LeftButton == MouseButtonState.Pressed)
{
double x = e.GetPosition(this).X - knobLocation.X;
double y = e.GetPosition(this).Y - knobLocation.Y;
//knobPosition.X = x;
//knobPosition.Y = y;
if (Math.Sqrt(x * x + y * y) <= Base.Width / 2)
{
knobPosition.X = x;
knobPosition.Y = y;
}
else
{
//linear equation to calculate point at radious on same line.
slope = y / x;
absX = Math.Sqrt(Math.Pow(Base.Width / 2, 2) / (Math.Pow(slope, 2) + 1));
absY = absX * slope;
if (x > 0)
{
knobPosition.X = absX;
}
else if (x < 0)
{
knobPosition.X = -absX;
}
else
{
knobPosition.X = 0;
}
if (y > 0)
{
if (x > 0)
{
knobPosition.Y = absY;
}
else
{
knobPosition.Y = -absY;
}
}
else if (y < 0)
{
if (x < 0)
{
knobPosition.Y = -absY;
}
else
{
knobPosition.Y = absY;
}
}
else
{
knobPosition.Y = 0;
}
}
Window parentWin = Window.GetWindow(this);
_vm = ((MainWindow)Application.Current.MainWindow).getVM();
/// the values to send to simulator, the joystick range is between -1 to 1 when the horizontal to the right take value 1 and most vertical up takes vlaue 1
_vm.FlyPlane(knobPosition.X / (Base.Width / 2), knobPosition.Y / (Base.Height / -2));
}
}