public double CartesianDistance(GPSPoint p)
{
double deltaX = this.X - p.X;
double deltaY = this.Y - p.Y;
double deltaZ = this.Z - p.Z;
return Math.Sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ * deltaZ);
}
public double HaversineDistance(GPSPoint p)
{
double dLat = (p.Latitude - this.Latitude).ToRadian();
double dLon = (p.Longitude - this.Longitude).ToRadian();
double lat1 = this.Latitude.ToRadian();
double lat2 = p.Latitude.ToRadian();
double a = Math.Sin(dLat / 2) * Math.Sin(dLat / 2) +
Math.Sin(dLon / 2) * Math.Sin(dLon / 2) * Math.Cos(lat1) * Math.Cos(lat2);
double c = 2 * Math.Atan2(Math.Sqrt(a), Math.Sqrt(1 - a));
double d = Radius * c;
return d;
}
private void chart_SeriesCursorMouseMove_1(object sender, ChartCursorEventArgs e)
{
var sv = e.SeriesViewer;
var c = sv.CrosshairPoint;
if (double.IsNaN(c.X) || double.IsNaN(c.Y))
{
return;
}
overlay.Children.Clear();
var items = (IList<Model.SubTypes.Path>)DefaultViewModel["Path"];
var count = items.Count;
var index = (int)Math.Round(c.X * (items.Count - 1));
if (index < 0 || index > items.Count - 1)
{
return;
}
var xVal = sv.CrosshairPoint.X;
var item = items[index];
var lat = item.Latitude;
var lon = item.Longitude;
var pois = (ObservableCollection<GPSPoint>)DefaultViewModel["PointsOfInterest"];
pois[0] = new GPSPoint(item);
foreach (var series in sv.Series)
{
if (series is HorizontalAnchoredCategorySeries)
{
var acs = (HorizontalAnchoredCategorySeries)series;
var il = series.ItemsSource as IList;
var ie = series.ItemsSource.OfType<object>();
int itemCount;
if (il != null)
{
itemCount = il.Count;
}
else
{
itemCount = ie.Count();
}
var itemIndex = xVal * (itemCount - 1);
var previousIndex = (int)Math.Floor(itemIndex);
var nextIndex = (int)Math.Ceiling(itemIndex);
if (previousIndex < 0)
{
previousIndex = 0;
}
if (nextIndex < 0)
{
nextIndex = 0;
}
if (nextIndex > itemCount - 1)
{
nextIndex = itemCount - 1;
}
if (previousIndex > itemCount - 1)
{
previousIndex = itemCount - 1;
}
object previousItem;
object nextItem;
if (il != null)
{
previousItem = il[previousIndex];
nextItem = il[nextIndex];
}
else
{
previousItem = ie.Skip(previousIndex).Take(1).First();
nextItem = ie.Skip(nextIndex).Take(1).First();
}
_frh.PropertyName = acs.ValueMemberPath;
var previousValue = Convert.ToDouble(_frh.GetPropertyValue(previousItem));
var nextValue = Convert.ToDouble(_frh.GetPropertyValue(nextItem));
var interpolatedValue = previousValue + (nextValue - previousValue) * (itemIndex - previousIndex);
if (series is LineSeries && interpolatedValue > (double)this.DefaultViewModel["MaxPaceRange"])
return;
var displayY = acs.YAxis.ScaleValue(interpolatedValue);
var displayX = acs.XAxis.ScaleValue(itemIndex);
var pos = series.TransformToVisual(overlay).TransformPoint(new Point(displayX, displayY));
var el = new Ellipse()
{
Fill = new SolidColorBrush(Colors.Blue),
Stroke = new SolidColorBrush(Colors.White),
StrokeThickness = 1,
Width = 14,
Height = 14
};
Canvas.SetTop(el, pos.Y - 7.0);
Canvas.SetLeft(el, pos.X - 7.0);
overlay.Children.Add(el);
var tb = new TextBlock();
tb.FontSize = 14;
if (series is AreaSeries)
tb.Text = Math.Round(interpolatedValue, 2).ToString() + " ft.";
else
tb.Text = Math.Round(interpolatedValue, 2).ToString() + " min/mi";
Canvas.SetTop(tb, pos.Y - 10.0);
Canvas.SetLeft(tb, pos.X + 10.0);
overlay.Children.Add(tb);
}
}
}
