private void UpdateRadar()
{
float radarAngle = MathHelper.ToRadians(-(float)((radarCanvas.RenderTransform as System.Windows.Media.RotateTransform).Angle));
Vector2 v0 = Vector2.Zero;
Vector2 v1 = new Vector2(60, -60);
Vector2 v2 = new Vector2(-60, -60);
v1 = Vector2Helper.RotateVector(radarAngle, v1);
v2 = Vector2Helper.RotateVector(radarAngle, v2);
Triangle radarHeadingTriangle = new Triangle(v0, v1, v2);
//****comment in for Radar Heading Debug Lines****//
//Dispatcher.BeginInvoke(delegate()
//{
// var l1 = radarCanvas.Children[0] as System.Windows.Shapes.Line;
// var l2 = radarCanvas.Children[1] as System.Windows.Shapes.Line;
// l1.X2 = v1.X;
// l1.Y2 = v1.Y;
// l2.X2 = v2.X;
// l2.Y2 = v2.Y;
//});
//****comment in for Radar Heading Debug Lines****//
foreach (LocationsVM.Location l in myVM.SelectedNearbyLocations)
{
if (radarHeadingTriangle.IsPointIn(l.RadarPoint))
{
l.RadarPointRepresenter.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("/images/yellow-dot.png", UriKind.Relative));
}
else
{
l.RadarPointRepresenter.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("/images/white-dot.png", UriKind.Relative));
}
}
}
/// <summary>
/// Calculates the HeadingAngle according to device (motion or compass) position angle
/// and sets the HeadingAngle property of this Location
/// </summary>
/// <param name="deviceRotationAngle">device position angle in degrees</param>
internal void CalculateHeadingAngle(double deviceRotationAngle)
{
double locationAngle = MathHelper.ToDegrees(Vector2Helper.AngleVectorToVector(RadarPoint, new Vector2(0, -45)));
HeadingAngle = deviceRotationAngle - locationAngle
+ Convert.ToInt32(RadarPoint.X > 0 && RadarPoint.Y < 0) * 90
- Convert.ToInt32(RadarPoint.X > 0 && RadarPoint.Y > 0) * 90;
}