private void UpdateGeometry(string operation, double segmentLength, double deviation)
{
// Start with the original polyline.
Polyline polyline = _originalPolyline;
// Apply the selected operation.
if (operation == "Generalize")
{
// Reset the other slider.
_segmentLengthSlider.Progress = 0;
polyline = (Polyline)GeometryEngine.Generalize(polyline, deviation, true);
// Update the result label.
_resultLabel.Text = $"Operation: Generalize, Deviation: {deviation:f}";
}
else
{
// Reset the other slider.
_deviationSlider.Progress = 0;
polyline = (Polyline)GeometryEngine.Densify(polyline, segmentLength);
// Update the result label.
_resultLabel.Text = $"Operation: Densify, Segment length: {segmentLength:f}";
}
// Update the graphic geometries to show the results.
_resultPolylineGraphic.Geometry = polyline;
_resultPointGraphic.Geometry = new Multipoint(polyline.Parts.SelectMany(m => m.Points));
}
// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
_inputOverlay.Graphics.Clear();
_resultOverlay.Graphics.Clear();
// Request polygon from the user
var poly = await MyMapView.Editor.RequestShapeAsync(DrawShape.Polygon, _polySymbol) as Polygon;
// Add original polygon and vertices to input graphics layer
_inputOverlay.Graphics.Add(new Graphic(poly, _polySymbol));
foreach (var coord in poly.Parts.First().GetPoints())
{
_inputOverlay.Graphics.Add(new Graphic(coord, _origVertexSymbol));
}
// Densify the polygon
var densify = GeometryEngine.Densify(poly, MyMapView.Extent.Width / 100) as Polygon;
// Add new vertices to result graphics layer
foreach (var coord in densify.Parts.First().GetPoints())
{
_resultOverlay.Graphics.Add(new Graphic(coord, _newVertexSymbol));
}
}
catch (Exception ex)
{
var _x = new MessageDialog("Densify Error: " + ex.Message, "Sample Error").ShowAsync();
}
}
private void OnUIChanged(object sender, EventArgs e)
{
// Start with the original polyline.
Polyline polyline = _originalPolyline;
// Reset the slider if the operation is changed.
if (sender is UISegmentedControl)
{
_slider.Value = 100.0F;
}
// Apply the selected operation.
if (_operationPicker.SelectedSegment == 0)
{
polyline = (Polyline)GeometryEngine.Densify(polyline, _slider.Value);
// Update the result label.
_resultLabel.Text = $"Densify - Segment length: {_slider.Value:f}";
}
else
{
polyline = (Polyline)GeometryEngine.Generalize(polyline, _slider.Value, true);
// Update the result label.
_resultLabel.Text = $"Generalize - Deviation: {_slider.Value:f}";
}
// Update the graphic geometries to show the results.
_resultPolylineGraphic.Geometry = polyline;
_resultPointGraphic.Geometry = new Multipoint(polyline.Parts.SelectMany(m => m.Points));
}
private void UpdateGeometry(string operation, double value)
{
// Start with the original polyline.
Polyline polyline = _originalPolyline;
// Apply the selected operation.
if (operation == "Generalize")
{
polyline = (Polyline)GeometryEngine.Generalize(polyline, value, true);
// Update the result label.
_resultLabel.Text = $"Generalize - Deviation: {value:f}";
}
else
{
polyline = (Polyline)GeometryEngine.Densify(polyline, value);
// Update the result label.
_resultLabel.Text = $"Densify - Segment length: {value:f}";
}
// Update the graphic geometries to show the results.
_resultPolylineGraphic.Geometry = polyline;
_resultPointGraphic.Geometry = new Multipoint(polyline.Parts.SelectMany(m => m.Points));
}
private void DensifyPolygonsButton_Click(object sender, RoutedEventArgs e)
{
//hide/show ui elements
try
{
var maxSegLength = GetMaxSegmentLength();
var results = GeometryEngine.Densify(densifyPolygonGeometry, maxSegLength);
//show the vertices for the polygon
foreach (var vert in (results as Polygon).Parts.FirstOrDefault().GetPoints())
{
var graphic = new Graphic {
Geometry = new MapPoint(vert.X, vert.Y), Symbol = densifyVertexMarkerSymbol
};
graphicsLayerVertices.Graphics.Add(graphic);
}
}
catch (Exception ex)
{
var dlg = new MessageDialog(ex.Message, "Geometry Engine Failed!");
var _ = dlg.ShowAsync();
}
//Hide/show ui elements
ResetUI();
}
// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
_inputOverlay.Graphics.Clear();
_resultsOverlay.Graphics.Clear();
// Request polygon from the user
var poly = await MyMapView.Editor.RequestShapeAsync(DrawShape.Polygon, _polySymbol) as Polygon;
// Add original polygon and vertices to input graphics layer
_inputOverlay.Graphics.Add(new Graphic(poly, _polySymbol));
foreach (var mapPoint in poly.Parts.First().GetPoints())
{
_inputOverlay.Graphics.Add(new Graphic(mapPoint, _origVertexSymbol));
}
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
// Densify the polygon
var densify = GeometryEngine.Densify(poly, viewpointExtent.Width / 100) as Polygon;
// Add new vertices to result graphics layer
foreach (var mapPoint in densify.Parts.First().GetPoints())
{
_resultsOverlay.Graphics.Add(new Graphic(mapPoint, _newVertexSymbol));
}
}
catch (Exception ex)
{
MessageBox.Show("Densify Error: " + ex.Message, "Densify Geometry Sample");
}
}
// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
inputGraphics.Graphics.Clear();
resultGraphics.Graphics.Clear();
// Request polygon from the user
var poly = await mapView.Editor.RequestShapeAsync(DrawShape.Polygon, _polySymbol) as Polygon;
// Add original polygon and vertices to input graphics layer
inputGraphics.Graphics.Add(new Graphic(poly, _polySymbol));
foreach (var coord in poly.Rings.First())
{
inputGraphics.Graphics.Add(new Graphic(new MapPoint(coord, poly.SpatialReference), _origVertexSymbol));
}
// Densify the polygon
var densify = GeometryEngine.Densify(poly, mapView.Extent.Width / 100) as Polygon;
// Add new vertices to result graphics layer
foreach (var coord in densify.Rings.First())
{
resultGraphics.Graphics.Add(new Graphic(new MapPoint(coord, poly.SpatialReference), _newVertexSymbol));
}
}
catch (Exception ex)
{
MessageBox.Show("Densify Error: " + ex.Message, "Densify Geometry Sample");
}
}
/// <summary>
/// Asynchronous task that splits the current sketch geometry into 100 segments of equal length.
/// </summary>
/// <returns>Task{bool}</returns>
private async Task <bool> ExecuteDensify()
{
// get the current sketch geometry from the editing module
var sketchGeometry = await EditingModule.GetSketchGeometryAsync();
// check if geometry is valid
bool isGeometryValid = await QueuingTaskFactory.StartNew <bool>(() =>
{
bool validGeometry = true;
if (sketchGeometry == null || sketchGeometry.IsEmpty)
{
validGeometry = false;
}
return(validGeometry);
});
if (!isGeometryValid)
{
return(false);
}
// get the currently selected features from the map
// the selected feature uses the above selected geometry
var currentlySelectedFeature = await MappingModule.ActiveMapView.Map.GetSelectionSetAsync();
// set up an edit operation
EditOperation editOperation = new EditOperation();
editOperation.Name = "Densify selected geometry";
Geometry densifiedGeometry = null;
// modify the geometry in the sketch geometry
// the geometry operation needs to run as it own task
await QueuingTaskFactory.StartNew(() =>
{
// compute a length fur the current geometry when divided into 100 segments
var segmentLength = GeometryEngine.Length(sketchGeometry) / 100;
// compute a new densified geometry
densifiedGeometry = GeometryEngine.Densify(sketchGeometry, segmentLength);
});
// for the currently selected feature go through the layers to which the feature belongs
foreach (var mapMember in currentlySelectedFeature.MapMembers)
{
// for each of the selections in the layer (map member)
foreach (var selectedOID in currentlySelectedFeature[mapMember])
{
// provide the densified geometry for the selected feature as part of the modify operation
editOperation.Modify((Layer)mapMember, selectedOID, densifiedGeometry);
}
}
// execute the edit operation and return
return(await editOperation.ExecuteAsync());
}
