private async Task DrawEllipse()
{
try
{
while (MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry.Extent != null)
{
// Accept user point
MapPoint userpoint = await MyMapView.Editor.RequestPointAsync() as MapPoint;
MapPoint point = GeometryEngine.NormalizeCentralMeridian(userpoint) as MapPoint;
// create the geodesic ellipse
var radius1 = (double)comboRadius1.SelectedItem;
var radius2 = (double)comboRadius2.SelectedItem;
var axis = sliderAxis.Value;
var maxLength = (double)comboSegmentLength.SelectedItem;
var param = new GeodesicEllipseParameters(point, radius1, radius2, LinearUnits.Miles)
{
AxisDirection = axis,
MaxPointCount = 10000,
MaxSegmentLength = maxLength
};
var ellipse = GeometryEngine.GeodesicEllipse(param);
//show geometries on map
_graphicsOverlay.Graphics.Clear();
_graphicsOverlay.Graphics.Add(new Graphic(point, _pinSymbol));
_graphicsOverlay.Graphics.Add(new Graphic(ellipse));
// geodesic sector
if ((bool)chkSector.IsChecked)
{
var sectorParams = new GeodesicSectorParameters(point, radius1, radius2, LinearUnits.Miles)
{
AxisDirection = axis,
MaxPointCount = 10000,
MaxSegmentLength = maxLength,
SectorAngle = sliderSectorAxis.Value,
StartDirection = sliderSectorStart.Value
};
var sector = GeometryEngine.GeodesicSector(sectorParams);
_graphicsOverlay.Graphics.Add(new Graphic(sector, _sectorSymbol));
}
}
}
catch (TaskCanceledException) { }
catch (Exception ex)
{
var _x = new MessageDialog(ex.Message, "Error").ShowAsync();
}
}
private async void EllipseButton_Click(object sender, RoutedEventArgs e)
{
try
{
while (mapView.Extent != null)
{
// Accept user point
var point = await mapView.Editor.RequestPointAsync();
// create the geodesic ellipse
var radius1 = (double)comboRadius1.SelectedItem;
var radius2 = (double)comboRadius2.SelectedItem;
var axis = sliderAxis.Value;
var maxLength = (double)comboSegmentLength.SelectedItem;
var param = new GeodesicEllipseParameters(point, radius1, radius2, LinearUnits.Miles)
{
AxisDirection = axis,
MaxPointCount = 10000,
MaxSegmentLength = maxLength
};
var ellipse = GeometryEngine.GeodesicEllipse(param);
//show geometries on map
_graphicsLayer.Graphics.Clear();
_graphicsLayer.Graphics.Add(new Graphic(point, _pinSymbol));
_graphicsLayer.Graphics.Add(new Graphic(ellipse));
// geodesic sector
if ((bool)chkSector.IsChecked)
{
var sectorParams = new GeodesicSectorParameters(point, radius1, radius2, LinearUnits.Miles)
{
AxisDirection = axis,
MaxPointCount = 10000,
MaxSegmentLength = maxLength,
SectorAngle = sliderSectorAxis.Value,
StartDirection = sliderSectorStart.Value
};
var sector = GeometryEngine.GeodesicSector(sectorParams);
_graphicsLayer.Graphics.Add(new Graphic(sector, _sectorSymbol));
}
}
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
var _ = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}