public void createPolygon(GraphicsOverlay myGraphicsOverlay)
{
var rec = new PolygonBuilder(SpatialReferences.Wgs84);
var lnSym = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Colors.Red, 2);
rec.AddPoint(new MapPoint(xMin, yMin));
rec.AddPoint(new MapPoint(xMin, yMax));
rec.AddPoint(new MapPoint(xMax, yMax));
rec.AddPoint(new MapPoint(xMax, yMin));
myGraphicsOverlay.Graphics.Add(new Graphic(rec.ToGeometry(), lnSym));
_geom = rec.ToGeometry();
}
private void GeneratePolyGeometry()
{
//PolyCoordinates.ToList()
List <MapPoint> points = new List <MapPoint>();
foreach (CoordinateObject coordObject in PolyCoordinates)
{
//points.Add(new MapPointBuilder(coordObject.MapPoint.X, coordObject.MapPoint.Y, 0, coordObject.MapPoint.SpatialReference));
points.Add(coordObject.MapPoint);
}
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
if (GeometryType == GeometryType.Polyline)
{
PolylineBuilder polylineBuilder = new PolylineBuilder(points);
polylineBuilder.HasZ = true;
MapGeometry = polylineBuilder.ToGeometry();
}
else if (GeometryType == GeometryType.Polygon)
{
PolygonBuilder polygonBuilder = new PolygonBuilder(points);
polygonBuilder.HasZ = true;
MapGeometry = polygonBuilder.ToGeometry();
}
});
}
/// <summary>
/// Creates a <see cref="Polygon" /> using the next token in the stream.
/// </summary>
/// <param name="tokenizer">
/// tokenizer over a stream of text in Well-known Text
/// format. The next tokens must form a MultiPolygon.
/// </param>
/// <returns>
/// a <code>MultiPolygon</code> specified by the next token in the
/// stream, or if if the coordinates used to create the <see cref="Polygon" />
/// shells and holes do not form closed linestrings.
/// </returns>
private static Polygon ReadMultiPolygonText(WktStreamTokenizer tokenizer)
{
var nextToken = GetNextEmptyOrOpener(tokenizer);
if (nextToken == "EMPTY")
{
throw new Exception("Empty MultiPolygon");
}
var polygon = ReadPolygonText(tokenizer);
var polygons = new PolygonBuilder(polygon);
var exteriorRingCcw = false;
// Need to pay attention to whether or not the first exterior ring is CW or CCW, so
// the other exterior rings match.
if (polygon.Parts.Count > 0)
{
exteriorRingCcw = Algorithms.IsCcw(polygon.Parts[0]);
}
nextToken = GetNextCloserOrComma(tokenizer);
while (nextToken == ",")
{
polygon = ReadPolygonText(tokenizer, exteriorRingCcw, true);
polygons.AddParts(polygon.Parts);
nextToken = GetNextCloserOrComma(tokenizer);
}
return(polygons.ToGeometry());
}
internal static Geometry MakeFishnetPolygon(Polygon inputPoly)
{
Envelope envPoly = inputPoly.Extent;
var interval = GetFishnetIntervalDistance(envPoly);
var pb = new PolygonBuilder(inputPoly.SpatialReference)
{
HasZ = true
};
for (var dX = envPoly.XMin; dX < envPoly.XMax + interval; dX += interval)
{
for (var dY = envPoly.YMin; dY < envPoly.YMax + interval; dY += interval)
{
var cutEnv = EnvelopeBuilder.CreateEnvelope(dX, dY, dX + interval, dY + interval, envPoly.SpatialReference);
if (GeometryEngine.Instance.Intersects(cutEnv, inputPoly))
{
var addPolygonPart = GeometryEngine.Instance.Clip(inputPoly, cutEnv) as Polygon;
if (addPolygonPart.Area < 0)
{
System.Diagnostics.Debug.WriteLine($@"area: {addPolygonPart.Area}");
}
pb.AddPart(addPolygonPart.Points);
}
}
}
return(pb.ToGeometry());
}
private void CreateOverlay()
{
// Create polygon builder and add polygon corners into it
PolygonBuilder builder = new PolygonBuilder(SpatialReferences.WebMercator);
builder.AddPoint(new MapPoint(-20e5, 20e5));
builder.AddPoint(new MapPoint(20e5, 20e5));
builder.AddPoint(new MapPoint(20e5, -20e5));
builder.AddPoint(new MapPoint(-20e5, -20e5));
// Get geometry from the builder
Polygon polygonGeometry = builder.ToGeometry();
// Create symbol for the polygon
SimpleFillSymbol polygonSymbol = new SimpleFillSymbol(
SimpleFillSymbolStyle.Solid,
System.Drawing.Color.Yellow,
null);
// Create new graphic
Graphic polygonGraphic = new Graphic(polygonGeometry, polygonSymbol);
// Create overlay to where graphics are shown
_polygonOverlay = new GraphicsOverlay();
_polygonOverlay.Graphics.Add(polygonGraphic);
// Add created overlay to the MapView
_myMapView.GraphicsOverlays.Add(_polygonOverlay);
}
/// <summary>
/// Writes a multipolygon.
/// </summary>
/// <param name="mp">The mulitpolygon to be written.</param>
/// <param name="bWriter">Stream to write to.</param>
/// <param name="byteorder">Byte order</param>
private static void WriteMultiPolygon(Polygon mp, BinaryWriter bWriter, WkbByteOrder byteorder)
{
//Write the number of polygons.
WriteUInt32((uint)mp.Parts.Count, bWriter, byteorder);
//Loop on the number of polygons.
for (var i = 0; i < mp.Parts.Count; i++)
{
var poly = mp.Parts[i];
//create a polygon and remember its orientation
var singlePolygon = new PolygonBuilder(poly);
var exteriorRingOrientation = Algorithms.IsCcw(poly);
//Add any interior rings
while (++i < mp.Parts.Count && Algorithms.IsCcw(mp.Parts[i]) != exteriorRingOrientation)
{
singlePolygon.AddPart(mp.Parts[i]);
}
//Write polygon header
bWriter.Write((byte)byteorder);
WriteUInt32((uint)WkbGeometryType.WkbPolygon, bWriter, byteorder);
//Write each polygon.
WritePolygon(singlePolygon.ToGeometry(), bWriter, byteorder);
}
}
protected override void OnClick()
{
QueuedTask.Run(async() =>
{
//get sketch geometry
var sketchGeom = await MapView.Active.GetCurrentSketchAsync();
//return if the sketch doesn't have enough points for its geometry type
if ((sketchGeom.GeometryType == GeometryType.Polygon && sketchGeom.PointCount < 3) || (sketchGeom.GeometryType == GeometryType.Polyline && sketchGeom.PointCount < 2))
return;
//get the sketch as a point collection
var pointCol = ((Multipart)sketchGeom).Points;
//get the last point in the sketch based on its geometry type
var lastSketchPoint = pointCol[(sketchGeom.GeometryType == GeometryType.Polygon) ? pointCol.Count -2 : pointCol.Count -1];
//build a geometry with the last sketch point and set the sketch
if (sketchGeom.GeometryType == GeometryType.Polygon)
{
//sketch polygons need two points for the initial feedback to work
var sketchPoly = new PolygonBuilder(new[] { lastSketchPoint,lastSketchPoint });
await MapView.Active.SetCurrentSketchAsync(sketchPoly.ToGeometry());
}
else
{
var sketchPolyline = new PolylineBuilder(new[] { lastSketchPoint });
await MapView.Active.SetCurrentSketchAsync(sketchPolyline.ToGeometry());
}
});
}
private void MySceneView_MouseDoubleClick(object sender, MouseEventArgs e)
{
if (type == "line" && mapPoint_list.Count != 0)
{
BorderContentText.Visibility = Visibility.Visible;
var boatPositions = new PolylineBuilder(SpatialReferences.Wgs84);
for (var i = 0; i < mapPoint_list.Count; i++)
{
boatPositions.AddPoint(new MapPoint(mapPoint_list[i].X, mapPoint_list[i].Y));
}
var boatRoute = boatPositions.ToGeometry();
_mapViewModel.Line(boatRoute, "line");
LineText.Text = "Line Length: " + GeometryEngine.LengthGeodetic(boatRoute).ToString("N2") + " meters";
}
else if (type == "area" && mapPoint_list.Count != 0)
{
BorderContentText.Visibility = Visibility.Visible;
var boatPositions = new PolygonBuilder(SpatialReferences.Wgs84);
for (var i = 0; i < mapPoint_list.Count; i++)
{
boatPositions.AddPoint(new MapPoint(mapPoint_list[i].X, mapPoint_list[i].Y));
}
var boatRoute = boatPositions.ToGeometry();
_mapViewModel.Area(boatRoute);
AreaText.Text = "Area Size: " + GeometryEngine.AreaGeodetic(boatRoute).ToString("N2") + " square meters";
}
mapPoint_list.Clear();
}
private void CreateOverlay()
{
// Create polygon builder and add polygon corners into it.
PolygonBuilder builder = new PolygonBuilder(SpatialReferences.WebMercator);
builder.AddPoint(new MapPoint(-20e5, 20e5));
builder.AddPoint(new MapPoint(20e5, 20e5));
builder.AddPoint(new MapPoint(20e5, -20e5));
builder.AddPoint(new MapPoint(-20e5, -20e5));
// Get geometry from the builder.
Polygon polygonGeometry = builder.ToGeometry();
// Create symbol for the polygon.
SimpleFillSymbol polygonSymbol = new SimpleFillSymbol(
SimpleFillSymbolStyle.Solid,
System.Drawing.Color.Yellow,
null);
// Create new graphic.
Graphic polygonGraphic = new Graphic(polygonGeometry, polygonSymbol);
// Create overlay to where graphics are shown.
_polygonOverlay = new GraphicsOverlay();
_polygonOverlay.Graphics.Add(polygonGraphic);
// Add created overlay to the MapView.
_myMapView.GraphicsOverlays.Add(_polygonOverlay);
}
protected override void OnClick()
{
QueuedTask.Run(async() =>
{
//get sketch geometry
var sketchGeom = await MapView.Active.GetCurrentSketchAsync();
//return if the sketch doesn't have enough points for its geometry type
if ((sketchGeom.GeometryType == GeometryType.Polygon && sketchGeom.PointCount < 3) || (sketchGeom.GeometryType == GeometryType.Polyline && sketchGeom.PointCount < 2))
{
return;
}
//get the sketch as a point collection
var pointCol = ((Multipart)sketchGeom).Points;
//get the last point in the sketch based on its geometry type
var lastSketchPoint = pointCol[(sketchGeom.GeometryType == GeometryType.Polygon) ? pointCol.Count - 2 : pointCol.Count - 1];
//build a geometry with the last sketch point and set the sketch
if (sketchGeom.GeometryType == GeometryType.Polygon)
{
//sketch polygons need two points for the initial feedback to work
var sketchPoly = new PolygonBuilder(new[] { lastSketchPoint, lastSketchPoint });
await MapView.Active.SetCurrentSketchAsync(sketchPoly.ToGeometry());
}
else
{
var sketchPolyline = new PolylineBuilder(new[] { lastSketchPoint });
await MapView.Active.SetCurrentSketchAsync(sketchPolyline.ToGeometry());
}
});
}
public static Graphic NewDonut(double x, double y, double innerRadius, double outerRadius)
{
double[] px = new double[NUM];
double[] py = new double[NUM];
GeometryAlgorithms.CircleToPoints(x, y, outerRadius, NUM, px, py, AngleDirection.CounterClockwise);
Esri.ArcGISRuntime.Geometry.PointCollection pc = new Esri.ArcGISRuntime.Geometry.PointCollection();
for (int i = 0; i < NUM; i++)
{
MapPoint p = new MapPoint(px[i], py[i]);
pc.Add(p);
}
pc.Add(pc[0]);
PolygonBuilder polygon = new PolygonBuilder(pc);
GeometryAlgorithms.CircleToPoints(x, y, innerRadius, NUM, px, py, AngleDirection.Clockwise);
pc = new Esri.ArcGISRuntime.Geometry.PointCollection();
for (int i = 0; i < NUM; i++)
{
MapPoint p = new MapPoint(px[i], py[i]);
pc.Add(p);
}
pc.Add(pc[0]);
polygon.AddPart(pc);
Graphic g = new Graphic();
g.Geometry = polygon.ToGeometry();
return(g);
}
private static Polygon CreateWkbMultiPolygon(BinaryReader reader, WkbByteOrder byteOrder)
{
// Get the number of Polygons.
var numPolygons = (int)ReadUInt32(reader, byteOrder);
if (numPolygons < 1)
{
throw new Exception("Could not create MultiPolygon");
}
// Read linestring header
reader.ReadByte();
ReadUInt32(reader, byteOrder);
// Create a new array for the Polygons.
var polygons = new PolygonBuilder(CreateWkbPolygon(reader, byteOrder));
// Loop on the number of polygons.
for (var i = 1; i < numPolygons; i++)
{
// read polygon header
reader.ReadByte();
ReadUInt32(reader, byteOrder);
// TODO: Validate type
polygons.AddParts(CreateWkbPolygon(reader, byteOrder).Parts);
}
//Create and return the MultiPolygon.
return(polygons.ToGeometry());
}
private Geometry polygonForStartingPoint(MapPoint mapPoint)
{
var polygon = new PolygonBuilder(SpatialReferences.Wgs84);
polygon.AddPoint(mapPoint.X, mapPoint.Y);
polygon.AddPoint(mapPoint.X, mapPoint.Y + squareSize);
polygon.AddPoint(mapPoint.X + squareSize, mapPoint.Y + squareSize);
polygon.AddPoint(mapPoint.X + squareSize, mapPoint.Y);
return(polygon.ToGeometry());
}
/// <summary>
/// The methods retrieves the outer ring(s) of the input polygon.
/// This method must be called on the MCT. Use QueuedTask.Run.
/// </summary>
/// <param name="inputPolygon">Input Polygon.</param>
/// <returns>The outer most (exterior, clockwise) ring(s) of the polygon. If the input is null or empty, a null pointer is returned.</returns>
/// <remarks>This method must be called on the MCT. Use QueuedTask.Run.</remarks>
public Polygon GetOutermostRings(Polygon inputPolygon)
{
if (inputPolygon == null || inputPolygon.IsEmpty)
{
return(null);
}
PolygonBuilder outerRings = new PolygonBuilder();
List <Polygon> internalRings = new List <Polygon>();
// explode the parts of the polygon into a list of individual geometries
var parts = MultipartToSinglePart(inputPolygon);
// get an enumeration of clockwise geometries (area > 0) ordered by the area
var clockwiseParts = parts.Where(geom => ((Polygon)geom).Area > 0).OrderByDescending(geom => ((Polygon)geom).Area);
// for each of the exterior rings
foreach (var part in clockwiseParts)
{
// add the first (the largest) ring into the internal collection
if (internalRings.Count == 0)
{
internalRings.Add(part as Polygon);
}
// use flag to indicate if current part is within the already selection polygons
bool isWithin = false;
foreach (var item in internalRings)
{
if (GeometryEngine.Within(part, item))
{
isWithin = true;
}
}
// if the current polygon is not within any polygon of the internal collection
// then it is disjoint and needs to be added to
if (isWithin == false)
{
internalRings.Add(part as Polygon);
}
}
// now assemble a new polygon geometry based on the internal polygon collection
foreach (var ring in internalRings)
{
outerRings.AddParts(ring.Parts);
}
// return the final geometry of the outer rings
return(outerRings.ToGeometry());
}
private Polygon ToPolygon(Polyline line)
{
var builder = new PolygonBuilder(SpatialReferences.WebMercator);
if (line.Parts != null && line.Parts.Count > 0)
{
foreach (var point in line.Parts[0].GetPoints())
{
builder.AddPoint(point);
}
}
return(builder.ToGeometry());
}
/// <summary>
/// Create a circular polygon around a mappoint for with a radius in pixels.
/// </summary>
/// <param name="mapPoint">Center of the circle as a mappoint.</param>
/// <param name="pixels">Circle radius in screen pixels.</param>
/// <returns>A polygon geometry.</returns>
private Polygon CreateSearchPolygon(MapPoint mapPoint, int pixels)
{
//get search radius
var screenPoint = MapView.Active.MapToScreen(mapPoint);
var radiusScreenPoint = new System.Windows.Point((screenPoint.X + pixels), screenPoint.Y);
var radiusMapPoint = MapView.Active.ScreenToMap(radiusScreenPoint);
var searchRadius = GeometryEngine.Distance(mapPoint, radiusMapPoint);
//build a search circle geometry
var cent = new Coordinate2D(mapPoint);
var searchGeom = EllipticArcBuilder.CreateEllipticArcSegment(cent, searchRadius, esriArcOrientation.esriArcClockwise, MapView.Active.Map.SpatialReference);
var searchPB = new PolygonBuilder(new[] { searchGeom });
return searchPB.ToGeometry();
}
/// <summary>
/// Create a circular polygon around a mappoint for with a radius in pixels.
/// </summary>
/// <param name="mapPoint">Center of the circle as a mappoint.</param>
/// <param name="pixels">Circle radius in screen pixels.</param>
/// <returns>A polygon geometry.</returns>
private Polygon CreateSearchPolygon(MapPoint mapPoint, int pixels)
{
//get search radius
var screenPoint = MapView.Active.MapToScreen(mapPoint);
var radiusScreenPoint = new System.Windows.Point((screenPoint.X + pixels), screenPoint.Y);
var radiusMapPoint = MapView.Active.ScreenToMap(radiusScreenPoint);
var searchRadius = GeometryEngine.Distance(mapPoint, radiusMapPoint);
//build a search circle geometry
var cent = new Coordinate2D(mapPoint);
var searchGeom = EllipticArcBuilder.CreateEllipticArcSegment(cent, searchRadius, esriArcOrientation.esriArcClockwise, MapView.Active.Map.SpatialReference);
var searchPB = new PolygonBuilder(new[] { searchGeom });
return(searchPB.ToGeometry());
}
public void SystemSpatialGeometryConvertPolygonToPolygon()
{
PolygonBuilder pb = new PolygonBuilder(SpatialReferences.Wgs84);
pb.AddPart(new MapPoint[] { new MapPoint(56, 67), new MapPoint(90, 10), new MapPoint(78, 89) });
var pl = pb.ToGeometry();
var g = pl.ToSystemSpatialGeometry();
Assert.IsNotNull(g);
Assert.IsInstanceOfType(g, typeof(System.Spatial.GeometryPolygon));
var p = (System.Spatial.GeometryPolygon)g;
Assert.AreEqual(1, p.Rings.Count);
Assert.AreEqual(4, p.Rings[0].Points.Count);
Assert.AreEqual(SpatialReferences.Wgs84.Wkid, p.CoordinateSystem.EpsgId);
}
private static Polygon CreateWkbPolygon(BinaryReader reader, WkbByteOrder byteOrder)
{
// Get the Number of rings in this Polygon.
var numRings = (int)ReadUInt32(reader, byteOrder);
Debug.Assert(numRings >= 1, "Number of rings in polygon must be 1 or more.");
var polygonBuilder = new PolygonBuilder(CreateWkbLinearRing(reader, byteOrder));
// Create a new array of linearrings for the interior rings.
for (var i = 0; i < numRings - 1; i++)
{
polygonBuilder.AddPart(CreateWkbLinearRing(reader, byteOrder));
}
// Create and return the Poylgon.
return(polygonBuilder.ToGeometry());
}
public void ZoomToEnvelope(double xMin, double yMin, double xMax, double yMax, MapView MyMapView)
{
var p1 = new PolygonBuilder(SpatialReferences.Wgs84);
var lnSym1 = new SimpleLineSymbol(SimpleLineSymbolStyle.Dash, Colors.Yellow, 2);
p1.AddPoint(xMin, yMin);
p1.AddPoint(xMin, yMax);
p1.AddPoint(180, yMax);
p1.AddPoint(180, yMin);
var rec = new Graphic(p1.ToGeometry(), lnSym1);
graphicsOverlay2.Graphics.Add(rec);
Envelope envelope = new Envelope(xMin + 1.6, yMin, 180.0, yMax, SpatialReferences.Wgs84);
MyMapView.SetViewpointGeometryAsync(envelope);
}
public void SystemSpatialGeometryConvertPolygonToMultiPolygon()
{
PolygonBuilder pb = new PolygonBuilder(SpatialReferences.Wgs84);
pb.AddPart(new MapPoint[] { new MapPoint(0, 0), new MapPoint(1, 1), new MapPoint(1, 0) });
pb.AddPart(new MapPoint[] { new MapPoint(10, 10), new MapPoint(10, 11), new MapPoint(11, 11), new MapPoint(11, 10) });
var pl = pb.ToGeometry();
var g = pl.ToSystemSpatialGeometry();
Assert.IsNotNull(g);
Assert.IsInstanceOfType(g, typeof(System.Spatial.GeometryMultiPolygon));
var p = (System.Spatial.GeometryMultiPolygon)g;
Assert.AreEqual(2, p.Polygons.Count);
Assert.AreEqual(1, p.Polygons[0].Rings.Count);
Assert.AreEqual(1, p.Polygons[1].Rings.Count);
Assert.AreEqual(SpatialReferences.Wgs84.Wkid, p.CoordinateSystem.EpsgId);
}
/// <summary>
/// Creates a Polygon using the next token in the stream.
/// </summary>
/// <param name="tokenizer">
/// Tokenizer over a stream of text in Well-known Text
/// format. The next tokens must form a <Polygon Text>.
/// </param>
/// <param name="exteriorRingCcw"></param>
/// <param name="exteriorRingCcwSpecified"></param>
/// <returns>
/// Returns a Polygon specified by the next token
/// in the stream
/// </returns>
/// <remarks>
/// ParseException is thown if the coordinates used to create the Polygon
/// shell and holes do not form closed linestrings, or if an unexpected
/// token is encountered.
/// </remarks>
private static Polygon ReadPolygonText(WktStreamTokenizer tokenizer, bool exteriorRingCcw = false,
bool exteriorRingCcwSpecified = false)
{
var nextToken = GetNextEmptyOrOpener(tokenizer);
if (nextToken == "EMPTY")
{
throw new Exception("Empty Polygon");
}
var exteriorRing = GetCoordinates(tokenizer);
IEnumerable <MapPoint> firstRing;
// Exterior ring. Force it to be CW/CCW to match the first exterior ring of the multipolygon, if it is part of a multipolygon
if (exteriorRingCcwSpecified)
{
firstRing = Algorithms.IsCcw(exteriorRing) != exteriorRingCcw?Reverse(exteriorRing) : exteriorRing;
}
else
{
firstRing = exteriorRing;
}
var polygonBuilder = new PolygonBuilder(firstRing);
nextToken = GetNextCloserOrComma(tokenizer);
while (nextToken == ",")
{
//Add holes
var interiorRing = GetCoordinates(tokenizer);
var correctedRing = interiorRing;
// Make sure interior rings go in the opposite direction of the exterior rings
if (Algorithms.IsCcw(interiorRing) == exteriorRingCcw)
{
correctedRing = Reverse(interiorRing);
}
polygonBuilder.AddPart(correctedRing); //interior rings
nextToken = GetNextCloserOrComma(tokenizer);
}
return(polygonBuilder.ToGeometry());
}
/// <summary>
/// Converts a MultiPolygon to <MultiPolygon Text> format, then Appends to it to the writer.
/// </summary>
/// <param name="multiPolygon">The MultiPolygon to process.</param>
/// <param name="writer">The output stream to Append to.</param>
private static void AppendMultiPolygonText(Polygon multiPolygon, StringWriter writer)
{
if (multiPolygon == null || multiPolygon.Parts.Count == 0)
{
writer.Write("EMPTY");
}
else
{
writer.Write("(");
var outerRing = true;
if (multiPolygon.Parts.Count > 0)
{
outerRing = Algorithms.IsCcw(multiPolygon.Parts[0]);
}
for (var i = 0; i < multiPolygon.Parts.Count; i++)
{
if (i > 0)
{
writer.Write(", ");
}
var singlePolygon = new PolygonBuilder(multiPolygon.Parts[i]);
//Add any interior rings
for (var j = i + 1; j < multiPolygon.Parts.Count; j++)
{
// It is an interior ring if the clockwise direction is opposite of the first ring
if (Algorithms.IsCcw(multiPolygon.Parts[j]) == outerRing)
{
break;
}
singlePolygon.AddPart(multiPolygon.Parts[j]);
i++;
}
AppendPolygonText(singlePolygon.ToGeometry(), writer);
}
writer.Write(")");
}
}
private void AddShapeLayer(List <IGeoInfo> shapeList, Layer layer)
{
foreach (ShapeGeoInfo shape in shapeList)
{
if (shape.Polygons.Values.Count == 0)
{
continue;
}
PolygonBuilder builder = new PolygonBuilder(SpatialReferences.Wgs84);
shape.Polygons.Values.ToList().ForEach(p => builder.AddParts(p.Parts));
Polygon polygon = builder.ToGeometry();
Dictionary <string, object> attr = new Dictionary <string, object>(shape.AttrList);
attr[KEY_CODE] = shape.KeyCode;
layer.GraphicsLayer.Graphics.Add(new Graphic(polygon, attr, MapShapeLayer.GetSymbol(GeoMarkerType.Fill, GeoStatus.Normal)));
_shapeList.Add(polygon.Extent);
layer.GraphicsLayer.Graphics.Add(new Graphic(polygon.Extent.GetCenter(), attr, MapShapeLayer.GetSymbol(GeoMarkerType.Point, GeoStatus.Normal)));
}
}
public void CodeExamples()
{
#region Example1
// methods need to run on the MCT
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
List <MapPoint> list = new List <MapPoint>();
MapPoint minPt = MapPointBuilder.CreateMapPoint(1.0, 1.0);
MapPoint maxPt = MapPointBuilder.CreateMapPoint(2.0, 2.0);
// create an envelope
Envelope env = EnvelopeBuilder.CreateEnvelope(minPt, maxPt);
// create a polygon from the envelope
using (PolygonBuilder polygonBuilder = new PolygonBuilder(env))
{
Polygon poly = polygonBuilder.ToGeometry();
}
});
#endregion Example1
#region Example2
// methods need to run on the MCT
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
List <MapPoint> list3D = new List <MapPoint>();
list3D.Add(MapPointBuilder.CreateMapPoint(1.0, 1.0, 1.0, 2.0));
list3D.Add(MapPointBuilder.CreateMapPoint(1.0, 2.0, 1.0, 2.0));
list3D.Add(MapPointBuilder.CreateMapPoint(2.0, 2.0, 1.0, 2.0));
list3D.Add(MapPointBuilder.CreateMapPoint(2.0, 1.0, 1.0, 2.0));
var polygon = PolygonBuilder.CreatePolygon(list3D);
});
#endregion Example2
}
public static Graphic NewDonut(double x, double y, double innerRadius, double outerRadius)
{
double[] px = new double[NUM];
double[] py = new double[NUM];
GeometryAlgorithms.CircleToPoints(x, y, outerRadius, NUM, px, py, AngleDirection.CounterClockwise);
Esri.ArcGISRuntime.Geometry.PointCollection pc = new Esri.ArcGISRuntime.Geometry.PointCollection();
for (int i = 0; i < NUM; i++)
{
MapPoint p = new MapPoint(px[i], py[i]);
pc.Add(p);
}
pc.Add(pc[0]);
PolygonBuilder polygon = new PolygonBuilder(pc);
GeometryAlgorithms.CircleToPoints(x, y, innerRadius, NUM, px, py, AngleDirection.Clockwise);
pc = new Esri.ArcGISRuntime.Geometry.PointCollection();
for (int i = 0; i < NUM; i++)
{
MapPoint p = new MapPoint(px[i], py[i]);
pc.Add(p);
}
pc.Add(pc[0]);
polygon.AddPart(pc);
Graphic g = new Graphic();
g.Geometry = polygon.ToGeometry();
return g;
}
/// <summary>
/// Edit existing <see cref="Polygon"/>. This will activate editing experience on the map. Edit is completed on double click.
/// </summary>
/// <param name="sceneView">The <see cref="SceneView"/> that is used for editing.</param>
/// <exception cref="TaskCanceledException">If previous task wasn't completed, <see cref="TaskCanceledException"/>
/// will be thrown. The task is cancelled if <see cref="Cancel"/> method or if any other draw or edit method is called.
/// </exception>
/// <returns>Return edited <see cref="Polygon"/> based on the user interactions.</returns>
public static async Task <Polygon> EditPolygonAsync(SceneView sceneView, Polygon polygon)
{
Initialize();
var tcs = new TaskCompletionSource <Polygon>();
PolygonBuilder polylineBuilder = new PolygonBuilder(sceneView.SpatialReference);
var sketchlayer = CreateSketchLayer(sceneView);
var vertexlayer = CreateSketchLayer(sceneView);
// Create vertices from the original polyline
var vertices = new List <Graphic>();
foreach (var vertex in (polygon.Parts[0].GetPoints()))
{
vertices.Add(new Graphic(vertex, DefaultVertexSymbol));
}
vertices.RemoveAt(vertices.Count - 1); // don't add closing point
// Default to original polyline
var newPolygon = new Polygon(polygon.Parts);
Graphic fillGraphic = new Graphic(newPolygon)
{
Symbol = DefaultFillSymbol
};
Graphic lineMoveGraphic = new Graphic()
{
Symbol = DefaultLineMoveSymbol
};
sketchlayer.Graphics.AddRange(new Graphic[] { fillGraphic, lineMoveGraphic });
vertexlayer.Graphics.AddRange(vertices);
CancellationTokenSource tokenSource = null;
Graphic selectedVertex = null;
bool isEditingVertex = false;
Action cleanupEvents = SetUpHandlers(sceneView,
(p) => //On mouse move, move completion line around
{
if (p != null && isEditingVertex)
{
// Update visual indicator polyline
var vertexPoints = newPolygon.Parts[0].GetPoints().ToList();
vertexPoints.RemoveAt(vertexPoints.Count - 1); // don't add closing point
var index = vertexPoints
.IndexOf(vertexPoints.Where
(point => GeometryEngine.Equals(point, selectedVertex.Geometry)).First());
var temporaryVertices = new List <MapPoint>();
if (index > 0)
{
temporaryVertices.Add(vertexPoints[index - 1]); // Add previous segment
}
else
{
temporaryVertices.Add(vertexPoints.Last()); // Add start segment from end
}
temporaryVertices.Add(p);
if (index != vertexPoints.Count() - 1)
{
temporaryVertices.Add(vertexPoints[index + 1]); // Add next segment
}
else
{
temporaryVertices.Add(vertexPoints.First());
}
var builder = new PolylineBuilder(temporaryVertices);
lineMoveGraphic.Geometry = builder.ToGeometry();
lineMoveGraphic.IsVisible = true;
}
else
{
lineMoveGraphic.IsVisible = false;
}
},
async(p) => //On tap add a vertex
{
if (p == null)
{
return;
}
if (isEditingVertex)
{
return;
}
if (selectedVertex != null)
{
selectedVertex.IsSelected = false;
}
selectedVertex = await vertexlayer.HitTestAsync(sceneView, sceneView.LocationToScreen(p));
// No vertex found so return
if (selectedVertex == null)
{
return;
}
isEditingVertex = true;
selectedVertex.IsSelected = true;
tokenSource = new CancellationTokenSource();
try
{
var newPoint = await SceneDrawHelper.DrawPointAsync(sceneView, tokenSource.Token);
if (newPoint == null)
{
return;
}
var vertexPoints = newPolygon.Parts[0].GetPoints().ToList();
vertexPoints.RemoveAt(vertexPoints.Count - 1); // don't add closing point
var index = vertexPoints
.IndexOf(vertexPoints.Where
(point => GeometryEngine.Equals(point, selectedVertex.Geometry)).First());
var builder = new PolygonBuilder(vertexPoints);
builder.Parts[0].MovePoint(index, newPoint);
// Update polyline
newPolygon = builder.ToGeometry();
fillGraphic.Geometry = newPolygon;
// Update vertex
selectedVertex.Geometry = newPoint;
tokenSource = null;
}
catch (TaskCanceledException tce)
{
}
finally
{
lineMoveGraphic.IsVisible = false;
selectedVertex.IsSelected = false;
selectedVertex = null;
isEditingVertex = false;
}
},
(p) => // Double tapped - completes task and returns new polygon
{
fillGraphic.IsVisible = false;
lineMoveGraphic.IsVisible = false;
tcs.SetResult(newPolygon);
});
Action cleanup = () =>
{
cleanupEvents();
sceneView.GraphicsOverlays.Remove(sketchlayer);
sceneView.GraphicsOverlays.Remove(vertexlayer);
if (tokenSource != null)
{
tokenSource.Cancel(); // Cancel vertex draw if it isn't finished
}
Cleanup();
};
_drawTaskTokenSource.Token.Register(() => tcs.SetCanceled());
Polygon result = null;
try
{
result = await tcs.Task;
}
finally
{
cleanup();
}
return(result);
}
async private void Image_MouseEnter(object sender, MouseEventArgs e)
{
Polygon polygon;
var blackSolidLineSymbol = SymbolFactory.Instance.ConstructLineSymbol(ColorFactory.Instance.BlueRGB, 5, SimpleLineStyle.Solid);
Geometry geometry = null;
await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
SpatialReference inSR = SpatialReferenceBuilder.CreateSpatialReference(32604);
SpatialReference sr4326 = SpatialReferences.WGS84;
SpatialReference sr3857 = SpatialReferences.WebMercator;
ProjectionTransformation projTransFromSRs = ArcGIS.Core.Geometry.ProjectionTransformation.Create(inSR, sr3857);
List <Coordinate2D> coordinates = new List <Coordinate2D>()
{
//new Coordinate2D(-159.20168702818188, 21.876487211082708),
//new Coordinate2D(-159.42653907783114, 21.838951660451173),
//new Coordinate2D(-159.44077880308507, 21.94718691051718),
//new Coordinate2D(-159.21630329750306, 21.94718691051718),
//new Coordinate2D(-159.21413990271841, 21.9365008022738),
//new Coordinate2D(-159.21383956606297, 21.93655454291286),
//new Coordinate2D(-159.20168702818188, 21.876487211082708),
new Coordinate2D(-17773406.8675, 2478583.7239999995),
new Coordinate2D(-17773406.8675, 2578583.7239999995),
new Coordinate2D(-16773406.8675, 2578583.7239999995),
new Coordinate2D(-17773406.8675, 2478583.7239999995)
};
//MapPoint point = new MapPointBuilder.FromGeoCoordinateString()
//List<MapPoint> mapPoints = new List<MapPoint>();
//foreach (Coordinate2D item in coordinates)
//{
// MapPoint point = new MapPointBuilder()
//}
//mapPoints.Add( coordinates[0].ToMapPoint());
MapPointBuilder asas = new MapPointBuilder(new Coordinate2D(-159.20168702818188, 21.876487211082708), MapView.Active.Extent.SpatialReference);
_polygonSymbol = SymbolFactory.Instance.ConstructPolygonSymbol(ColorFactory.Instance.BlackRGB, SimpleFillStyle.Null, SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.BlackRGB, 2.0, SimpleLineStyle.Solid));
MapPoint point = asas.ToGeometry();
MapPoint point2 = MapPointBuilder.FromGeoCoordinateString(point.ToGeoCoordinateString(new ToGeoCoordinateParameter(GeoCoordinateType.DD)), MapView.Active.Extent.SpatialReference, GeoCoordinateType.DD);
using (PolygonBuilder polygonBuilder = new PolygonBuilder(coordinates, inSR))
{
polygonBuilder.SpatialReference = inSR;
polygon = polygonBuilder.ToGeometry();
geometry = polygonBuilder.ToGeometry();
Geometry geometry2 = GeometryEngine.Instance.ProjectEx(geometry, projTransFromSRs);
_graphic = MapView.Active.AddOverlayAsync(geometry, _polygonSymbol.MakeSymbolReference());
//Application.Current.
}
});
//await QueuedTask.Run(() =>
//{
// MapView.Active.UpdateOverlay(_graphic, point, SymbolFactory.Instance.ConstructPointSymbol(
// ColorFactory.Instance.BlueRGB, 20.0, SimpleMarkerStyle.Circle).MakeSymbolReference());
//});
//_graphic = await this.AddOverlayAsync(geometry, _lineSymbol.MakeSymbolReference());
Console.WriteLine(sender.ToString());
//_graphic = MapView.Active.AddOverlay(geometry, _lineSymbol.MakeSymbolReference());
//Geometry geometry = new PolygonBuilder.CreatePolygon(coordinates, inSR); ;
}
// myMapView 事件
private async void MyMapView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
IInputElement ie = (IInputElement)(sender);
MapPoint loc = myMapView.ScreenToLocation(e.GetPosition(ie));
switch (operation)
{
case OperateType.DrawPoint: //画点
Graphic pt = new Graphic(loc, pointSymbol);
graphicsLayer.Graphics.Add(pt);
break;
case OperateType.DrawPolyline: //画线
pointCollection.Add(loc);
if (pointCollection.Count >= 2)
{
if (pointCollection.Count > 2)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolylineBuilder lb = new PolylineBuilder(pointCollection);
g.Geometry = lb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polyline l = new Esri.ArcGISRuntime.Geometry.Polyline(pointCollection);
Graphic lg = new Graphic(l, lineSymbol);
graphicsLayer.Graphics.Add(lg);
}
}
break;
case OperateType.DrawPolygon: //画多边形
pointCollection.Add(loc);
if (pointCollection.Count >= 3)
{
if (pointCollection.Count > 3)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolygonBuilder pb = new PolygonBuilder(pointCollection);
g.Geometry = pb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polygon p = new Esri.ArcGISRuntime.Geometry.Polygon(pointCollection);
Graphic pg = new Graphic(p, fillSymbol);
graphicsLayer.Graphics.Add(pg);
}
}
break;
case OperateType.None: //缺省状态
graphicsLayer.ClearSelection();
IdentifyGraphicsOverlayResult result = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
//选择图形元素
if (result.Graphics.Count < 1)
{
curSelGraphic = null;
EditVertexMenuItem.IsEnabled = false;
UneditVertexMenuItem.IsEnabled = false;
return;
}
curSelGraphic = result.Graphics.First();
curSelGraphic.IsSelected = true;
EditVertexMenuItem.IsEnabled = true;
break;
case OperateType.Cal_Clip: //选择图形
IdentifyGraphicsOverlayResult gResult = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult.Graphics.Count < 1)
{
return;
}
Graphic selGraphic = gResult.Graphics.First();
selGraphic.IsSelected = true; listOfClipGraphics.Add(selGraphic); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为2时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请选择两个多边形图形！");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Clip(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
graphicsLayer.Graphics.Remove(g2);
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic); operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Union: // 联合
IdentifyGraphicsOverlayResult gResultUnion = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResultUnion.Graphics.Count < 1)
{
return;
}
Graphic selGraphicUnion = gResultUnion.Graphics.First();
selGraphicUnion.IsSelected = true;
listOfClipGraphics.Add(selGraphicUnion); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为2时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请选择两个多边形图形！");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Union(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
graphicsLayer.Graphics.Remove(g2);
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Cut: // 剪切
IdentifyGraphicsOverlayResult gResult_Cut = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Cut.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Cut = gResult_Cut.Graphics.First();
selGraphic_Cut.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Cut); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polyline) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请先选择一个面要素后再选择一个线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Polyline polyLine = (Esri.ArcGISRuntime.Geometry.Polyline)g2.Geometry;
Esri.ArcGISRuntime.Geometry.Geometry[] resultGeometry = GeometryEngine.Cut(g1.Geometry, polyLine); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1);
for (int z = 0; z < resultGeometry.Length; z++)
{
Graphic clipedGraphic = new Graphic(resultGeometry[z], fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
}
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Simplify: // 拓扑纠正
IdentifyGraphicsOverlayResult gResult_Simplify = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Simplify.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Simplify = gResult_Simplify.Graphics.First();
selGraphic_Simplify.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Simplify); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
if (g1.Geometry.GeometryType == GeometryType.Point) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请先选择一个面要素或线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Simplify(g1.Geometry); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Gene: // 简化
IdentifyGraphicsOverlayResult gResult_Gene = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Gene.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Gene = gResult_Gene.Graphics.First();
selGraphic_Gene.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Gene); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时
{
Graphic g1 = listOfClipGraphics[0];
if (g1.Geometry.GeometryType == GeometryType.Point) //如果所选图形是点，则退出
{
MessageBox.Show("请先选择一个面要素或线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Generalize(g1.Geometry, 1000000.0, true); //执行剪切操作
if (resultGeometry != null) //处理结果
{
MessageBox.Show(resultGeometry.ToJson() + "\n" + resultGeometry.GeometryType);
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Buff: // 缓冲
IdentifyGraphicsOverlayResult gResult_Buff = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Buff.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Buff = gResult_Buff.Graphics.First();
selGraphic_Buff.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Buff); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Buffer(g1.Geometry, 1000000.0); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.FromArgb(125, 255, 250, 0), new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(0, 0, 0), 4.0))); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Jiaodian: // 交点
IdentifyGraphicsOverlayResult gResult_Jiaodian = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Jiaodian.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Jiaodian = gResult_Jiaodian.Graphics.First();
selGraphic_Jiaodian.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Jiaodian); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
IReadOnlyList <Geometry> resultGeometry = GeometryEngine.Intersections(g1.Geometry, g2.Geometry); //执行剪切操作
if (resultGeometry != null) //处理结果
{
Graphic clipedGraphic = new Graphic(resultGeometry[0], pointSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
}
}
// myMapView 事件
private async void MyMapView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
IInputElement ie = (IInputElement)(sender);
MapPoint loc = myMapView.ScreenToLocation(e.GetPosition(ie));
switch (operation)
{
case OperateType.DrawPoint: //画点
Graphic pt = new Graphic(loc, pointSymbol);
graphicsLayer.Graphics.Add(pt);
break;
case OperateType.DrawPolyline: //画线
pointCollection.Add(loc); if (pointCollection.Count >= 2)
{
if (pointCollection.Count > 2)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolylineBuilder lb = new PolylineBuilder(pointCollection); g.Geometry = lb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polyline l = new Esri.ArcGISRuntime.Geometry.Polyline(pointCollection);
Graphic lg = new Graphic(l, lineSymbol);
graphicsLayer.Graphics.Add(lg);
}
}
break;
case OperateType.DrawPolygon: //画多边形
pointCollection.Add(loc); if (pointCollection.Count >= 3)
{
if (pointCollection.Count > 3)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolygonBuilder pb = new PolygonBuilder(pointCollection); g.Geometry = pb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polygon p = new Esri.ArcGISRuntime.Geometry.Polygon(pointCollection);
Graphic pg = new Graphic(p, fillSymbol);
graphicsLayer.Graphics.Add(pg);
}
}
break;
case OperateType.None: //缺省状态
graphicsLayer.ClearSelection();
IdentifyGraphicsOverlayResult result = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
//选择图形元素
if (result.Graphics.Count < 1)
{
curSelGraphic = null;
EditVertexMenuItem.IsEnabled = false;
UneditVertexMenuItem.IsEnabled = false;
return;
}
curSelGraphic = result.Graphics.First();
curSelGraphic.IsSelected = true;
EditVertexMenuItem.IsEnabled = true;
break;
}
}
private void MyMapView_MouseRightButtonUp(object sender, MouseButtonEventArgs e)
{
myMapView.Cursor = Cursors.Arrow;//恢复光标样式
if (curSelGraphic == null || orgPoint == null)
{
return; //计算位移
}
IInputElement ie = (IInputElement)(sender);
MapPoint loc = myMapView.ScreenToLocation(e.GetPosition(ie));
double deltaX = loc.X - orgPoint.X;
double deltaY = loc.Y - orgPoint.Y;
if (operation == OperateType.None) //非绘制状态或顶点编辑状态
{
if (curSelGraphic.Geometry.GeometryType == GeometryType.Point) //当前选择的图形 为点，重新构造点
{
MapPointBuilder pb = new MapPointBuilder(loc);
curSelGraphic.Geometry = pb.ToGeometry();
}
else if (curSelGraphic.Geometry.GeometryType == GeometryType.Polyline)//当前选 择的图形为线，重新计算所有点
{
Esri.ArcGISRuntime.Geometry.Polyline ln = (Esri.ArcGISRuntime.Geometry.Polyline)curSelGraphic.Geometry; pointCollection.Clear();
for (int i = 0; i < ln.Parts[0].Points.Count; i++)
{
double X = ln.Parts[0].Points[i].X + deltaX; double Y = ln.Parts[0].Points[i].Y + deltaY;
MapPoint Pt = new MapPoint(X, Y); pointCollection.Add(Pt);
}
PolylineBuilder lb = new PolylineBuilder(pointCollection);
curSelGraphic.Geometry = lb.ToGeometry();
}
else if (curSelGraphic.Geometry.GeometryType == GeometryType.Polygon)//当前选 择图形为多边形，重新计算所有点
{
Esri.ArcGISRuntime.Geometry.Polygon poly = (Esri.ArcGISRuntime.Geometry.Polygon)curSelGraphic.Geometry;
pointCollection.Clear();
for (int i = 0; i < poly.Parts[0].Points.Count; i++)
{
double X = poly.Parts[0].Points[i].X + deltaX; double Y = poly.Parts[0].Points[i].Y + deltaY;
MapPoint Pt = new MapPoint(X, Y); pointCollection.Add(Pt);
}
PolygonBuilder pb = new PolygonBuilder(pointCollection);
curSelGraphic.Geometry = pb.ToGeometry();
}
}
else if (operation == OperateType.EditVertex)//处于顶点编辑状态
{
if (selGracphicIndex >= 0)
{
Graphic g = graphicsLayer.Graphics.ElementAt(selGracphicIndex); //找到所选 图形
if (g.Geometry.GeometryType == GeometryType.Point) //图形为点
{
MapPointBuilder mpb = new MapPointBuilder(loc);
g.Geometry = mpb.ToGeometry();
}
else if (g.Geometry.GeometryType == GeometryType.Polyline && selPointIndex >= 0)//图形为线，顶点已捕捉
{
Esri.ArcGISRuntime.Geometry.Polyline pln = (Esri.ArcGISRuntime.Geometry.Polyline)g.Geometry;
pointCollection.Clear(); pointCollection.AddPoints(pln.Parts[0].Points); pointCollection.SetPoint(selPointIndex, loc.X, loc.Y);
PolylineBuilder plb = new PolylineBuilder(pointCollection); g.Geometry = plb.ToGeometry();
}
else if (g.Geometry.GeometryType == GeometryType.Polygon && selPointIndex >= 0)//图形为多边形，顶点已捕捉
{
Esri.ArcGISRuntime.Geometry.Polygon plg = (Esri.ArcGISRuntime.Geometry.Polygon)g.Geometry; pointCollection.Clear();
pointCollection.AddPoints(plg.Parts[0].Points); pointCollection.SetPoint(selPointIndex, loc.X, loc.Y);
PolygonBuilder pgb = new PolygonBuilder(pointCollection); g.Geometry = pgb.ToGeometry();
}
if (selPointIndex >= 0)
{//移动相应的顶点到当前位置
Graphic vtGraphic = selVertexLayer.Graphics.ElementAt(selPointIndex);
MapPointBuilder tgPoint = new MapPointBuilder(loc); vtGraphic.Geometry = tgPoint.ToGeometry();
}
}
}
}
/// <summary>
/// Edit existing <see cref="Polygon"/>. This will activate editing experience on the map. Edit is completed on double click.
/// </summary>
/// <param name="sceneView">The <see cref="SceneView"/> that is used for editing.</param>
/// <exception cref="TaskCanceledException">If previous task wasn't completed, <see cref="TaskCanceledException"/>
/// will be thrown. The task is cancelled if <see cref="Cancel"/> method or if any other draw or edit method is called.
/// </exception>
/// <returns>Return edited <see cref="Polygon"/> based on the user interactions.</returns>
public static async Task<Polygon> EditPolygonAsync(SceneView sceneView, Polygon polygon)
{
Initialize();
var tcs = new TaskCompletionSource<Polygon>();
PolygonBuilder polylineBuilder = new PolygonBuilder(sceneView.SpatialReference);
var sketchlayer = CreateSketchLayer(sceneView);
var vertexlayer = CreateSketchLayer(sceneView);
// Create vertices from the original polyline
var vertices = new List<Graphic>();
foreach (var vertex in (polygon.Parts[0].GetPoints()))
vertices.Add(new Graphic(vertex, DefaultVertexSymbol));
vertices.RemoveAt(vertices.Count - 1); // don't add closing point
// Default to original polyline
var newPolygon = new Polygon(polygon.Parts);
Graphic fillGraphic = new Graphic(newPolygon) { Symbol = DefaultFillSymbol };
Graphic lineMoveGraphic = new Graphic() { Symbol = DefaultLineMoveSymbol };
sketchlayer.Graphics.AddRange(new Graphic[] { fillGraphic, lineMoveGraphic });
vertexlayer.Graphics.AddRange(vertices);
CancellationTokenSource tokenSource = null;
Graphic selectedVertex = null;
bool isEditingVertex = false;
Action cleanupEvents = SetUpHandlers(sceneView,
(p) => //On mouse move, move completion line around
{
if (p != null && isEditingVertex)
{
// Update visual indicator polyline
var vertexPoints = newPolygon.Parts[0].GetPoints().ToList();
vertexPoints.RemoveAt(vertexPoints.Count - 1); // don't add closing point
var index = vertexPoints
.IndexOf(vertexPoints.Where
(point => GeometryEngine.Equals(point, selectedVertex.Geometry)).First());
var temporaryVertices = new List<MapPoint>();
if (index > 0)
temporaryVertices.Add(vertexPoints[index - 1]); // Add previous segment
else
temporaryVertices.Add(vertexPoints.Last()); // Add start segment from end
temporaryVertices.Add(p);
if (index != vertexPoints.Count() - 1)
temporaryVertices.Add(vertexPoints[index + 1]); // Add next segment
else
temporaryVertices.Add(vertexPoints.First());
var builder = new PolylineBuilder(temporaryVertices);
lineMoveGraphic.Geometry = builder.ToGeometry();
lineMoveGraphic.IsVisible = true;
}
else
{
lineMoveGraphic.IsVisible = false;
}
},
async (p) => //On tap add a vertex
{
if (p == null) return;
if (isEditingVertex) return;
if (selectedVertex != null) selectedVertex.IsSelected = false;
selectedVertex = await vertexlayer.HitTestAsync(sceneView, sceneView.LocationToScreen(p));
// No vertex found so return
if (selectedVertex == null)
return;
isEditingVertex = true;
selectedVertex.IsSelected = true;
tokenSource = new CancellationTokenSource();
try
{
var newPoint = await SceneDrawHelper.DrawPointAsync(sceneView, tokenSource.Token);
if (newPoint == null) return;
var vertexPoints = newPolygon.Parts[0].GetPoints().ToList();
vertexPoints.RemoveAt(vertexPoints.Count - 1); // don't add closing point
var index = vertexPoints
.IndexOf(vertexPoints.Where
(point => GeometryEngine.Equals(point, selectedVertex.Geometry)).First());
var builder = new PolygonBuilder(vertexPoints);
builder.Parts[0].MovePoint(index, newPoint);
// Update polyline
newPolygon = builder.ToGeometry();
fillGraphic.Geometry = newPolygon;
// Update vertex
selectedVertex.Geometry = newPoint;
tokenSource = null;
}
catch (TaskCanceledException tce)
{
}
finally
{
lineMoveGraphic.IsVisible = false;
selectedVertex.IsSelected = false;
selectedVertex = null;
isEditingVertex = false;
}
},
(p) => // Double tapped - completes task and returns new polygon
{
fillGraphic.IsVisible = false;
lineMoveGraphic.IsVisible = false;
tcs.SetResult(newPolygon);
});
Action cleanup = () =>
{
cleanupEvents();
sceneView.GraphicsOverlays.Remove(sketchlayer);
sceneView.GraphicsOverlays.Remove(vertexlayer);
if (tokenSource != null) tokenSource.Cancel(); // Cancel vertex draw if it isn't finished
Cleanup();
};
_drawTaskTokenSource.Token.Register(() => tcs.SetCanceled());
Polygon result = null;
try
{
result = await tcs.Task;
}
finally
{
cleanup();
}
return result;
}
/// <summary>
/// The methods retrieves the outer ring(s) of the input polygon.
/// This method must be called on the MCT. Use QueuedTask.Run.
/// </summary>
/// <param name="inputPolygon">Input Polygon.</param>
/// <returns>The outer most (exterior, clockwise) ring(s) of the polygon. If the input is null or empty, a null pointer is returned.</returns>
/// <remarks>This method must be called on the MCT. Use QueuedTask.Run.</remarks>
public Polygon GetOutermostRings(Polygon inputPolygon)
{
if (inputPolygon == null || inputPolygon.IsEmpty)
return null;
PolygonBuilder outerRings = new PolygonBuilder();
List<Polygon> internalRings = new List<Polygon>();
// explode the parts of the polygon into a list of individual geometries
var parts = MultipartToSinglePart(inputPolygon);
// get an enumeration of clockwise geometries (area > 0) ordered by the area
var clockwiseParts = parts.Where(geom => ((Polygon)geom).Area > 0).OrderByDescending(geom => ((Polygon)geom).Area);
// for each of the exterior rings
foreach (var part in clockwiseParts)
{
// add the first (the largest) ring into the internal collection
if (internalRings.Count == 0)
internalRings.Add(part as Polygon);
// use flag to indicate if current part is within the already selection polygons
bool isWithin = false;
foreach (var item in internalRings)
{
if (GeometryEngine.Within(part, item))
isWithin = true;
}
// if the current polygon is not within any polygon of the internal collection
// then it is disjoint and needs to be added to
if (isWithin == false)
internalRings.Add(part as Polygon);
}
// now assemble a new polygon geometry based on the internal polygon collection
foreach (var ring in internalRings)
{
outerRings.AddParts(ring.Parts);
}
// return the final geometry of the outer rings
return outerRings.ToGeometry();
}
public static async Task <Polygon> DrawPolygonAsync(MapView sceneView, System.Threading.CancellationToken cancellationToken)
{
var tcs = new TaskCompletionSource <Polygon>();
PolygonBuilder polygonBuilder = new PolygonBuilder(sceneView.SpatialReference);
var sketchlayer = CreateSketchLayer(sceneView);
Graphic polygonGraphic = new Graphic()
{
Symbol = DefaultFillSymbol
};
Graphic lineMoveGraphic = new Graphic()
{
Symbol = DefaultLineMoveSymbol
};
sketchlayer.Graphics.AddRange(new Graphic[] { polygonGraphic, lineMoveGraphic });
Action cleanupEvents = SetUpHandlers(sceneView,
(p) => //On mouse move move completion line around
{
if (p != null && polygonBuilder.Parts.Count > 0)
{
lineMoveGraphic.Geometry = new Polyline(new MapPoint[]
{
polygonBuilder.Parts[0].Last().EndPoint,
p,
polygonBuilder.Parts[0].First().StartPoint
});
}
},
(p) => //On tap add a vertex
{
if (p != null)
{
polygonBuilder.AddPoint(p);
if (polygonBuilder.Parts.Count > 0 && polygonBuilder.Parts[0].Count > 0)
{
polygonGraphic.Geometry = polygonBuilder.ToGeometry();
lineMoveGraphic.Geometry = null;
}
}
},
(p) => //View tapped - completes task and returns point
{
tcs.SetResult(polygonBuilder.ToGeometry());
});
Action cleanup = () =>
{
cleanupEvents();
sceneView.GraphicsOverlays.Remove(sketchlayer);
};
cancellationToken.Register(() => tcs.SetCanceled());
Polygon result = null;
try
{
result = await tcs.Task;
}
finally
{
cleanup();
}
return(result);
}
/// <summary>
/// Returns a polygon with a range fan(circular ring sector - like a donut wedge or wiper blade swipe with inner and outer radius)
/// from the input parameters
/// Input Angles must be 0-360 degrees
/// </summary>
public static Geometry ConstructRangeFan(MapPoint centerPoint,
double innerDistanceInMapUnits, double outerDistanceInMapUnits,
double horizontalStartAngleInBearing, double horizontalEndAngleInBearing,
SpatialReference sr, double incrementAngleStep = 1.0)
{
// Check inputs
if ((centerPoint == null) || (sr == null) ||
(innerDistanceInMapUnits < 0.0) || (outerDistanceInMapUnits < 0.0) ||
(horizontalStartAngleInBearing < 0.0) || (horizontalStartAngleInBearing > 360.0) ||
(horizontalEndAngleInBearing < 0.0) || (horizontalEndAngleInBearing > 360.0))
{
return(null);
}
// Tricky - if angle cuts across 360, need to adjust for this case (ex. Angle: 270->90)
if (horizontalStartAngleInBearing > horizontalEndAngleInBearing)
{
horizontalStartAngleInBearing = -(360.0 - horizontalStartAngleInBearing);
}
double deltaAngle = Math.Abs(horizontalStartAngleInBearing - horizontalEndAngleInBearing);
// if full circle(or greater), return donut section with inner/outer rings
if ((deltaAngle == 0.0) || (deltaAngle >= 360.0))
{
// Just add 2 concentric circle buffers
PolygonBuilder donutPb = new PolygonBuilder();
EllipticArcSegment circularArcOuter =
EllipticArcBuilder.CreateEllipticArcSegment((Coordinate2D)centerPoint,
outerDistanceInMapUnits, esriArcOrientation.esriArcClockwise, sr);
donutPb.AddPart(new List <Segment> {
circularArcOuter
});
if (innerDistanceInMapUnits > 0.0)
{
EllipticArcSegment circularArcInner =
EllipticArcBuilder.CreateEllipticArcSegment((Coordinate2D)centerPoint,
innerDistanceInMapUnits, esriArcOrientation.esriArcCounterClockwise, sr);
donutPb.AddPart(new List <Segment> {
circularArcInner
});
}
return(donutPb.ToGeometry());
}
// Otherwise if range fan, construct that
var points = new List <MapPoint>();
MapPoint startPoint = null;
if (innerDistanceInMapUnits <= 0.0)
{
startPoint = centerPoint;
points.Add(startPoint);
}
double minAngle = Math.Min(horizontalStartAngleInBearing, horizontalEndAngleInBearing);
double maxAngle = Math.Max(horizontalStartAngleInBearing, horizontalEndAngleInBearing);
// don't let this create more than 360 points per arc
if ((deltaAngle / incrementAngleStep) > 360.0)
{
incrementAngleStep = deltaAngle / 360.0;
}
// Draw Outer Arc of Ring
// Implementation Note: because of the unique shape of this ring,
// it was easier to manually create these points than use EllipticArcBuilder
for (double angle = minAngle; angle <= maxAngle; angle += incrementAngleStep)
{
double cartesianAngle = (450 - angle) % 360;
double angleInRadians = cartesianAngle * (Math.PI / 180.0);
double x = centerPoint.X + (outerDistanceInMapUnits * Math.Cos(angleInRadians));
double y = centerPoint.Y + (outerDistanceInMapUnits * Math.Sin(angleInRadians));
MapPoint pointToAdd = MapPointBuilder.CreateMapPoint(x, y, sr);
points.Add(pointToAdd);
if (startPoint == null)
{
startPoint = pointToAdd;
}
}
if (innerDistanceInMapUnits > 0.0)
{
// Draw Inner Arc of Ring - if inner distance set
for (double angle = maxAngle; angle >= minAngle; angle -= incrementAngleStep)
{
double cartesianAngle = (450 - angle) % 360;
double angleInRadians = cartesianAngle * (Math.PI / 180.0);
double x = centerPoint.X + (innerDistanceInMapUnits * Math.Cos(angleInRadians));
double y = centerPoint.Y + (innerDistanceInMapUnits * Math.Sin(angleInRadians));
points.Add(MapPointBuilder.CreateMapPoint(x, y, sr));
}
}
// close Polygon
points.Add(startPoint);
PolygonBuilder pb = new PolygonBuilder();
pb.AddPart(points);
return(pb.ToGeometry());
}
public static async Task<Polygon> DrawPolygonAsync(SceneView sceneView, System.Threading.CancellationToken cancellationToken)
{
var tcs = new TaskCompletionSource<Polygon>();
PolygonBuilder polygonBuilder = new PolygonBuilder(sceneView.SpatialReference);
var sketchlayer = CreateSketchLayer(sceneView);
Graphic polygonGraphic = new Graphic() { Symbol = DefaultFillSymbol };
Graphic lineMoveGraphic = new Graphic() { Symbol = DefaultLineMoveSymbol };
sketchlayer.Graphics.AddRange(new Graphic[] { polygonGraphic, lineMoveGraphic });
Action cleanupEvents = SetUpHandlers(sceneView,
(p) => //On mouse move move completion line around
{
if (p != null && polygonBuilder.Parts.Count > 0)
{
lineMoveGraphic.Geometry = new Polyline(new MapPoint[]
{
polygonBuilder.Parts[0].Last().EndPoint,
p,
polygonBuilder.Parts[0].First().StartPoint
});
}
},
(p) => //On tap add a vertex
{
if (p != null)
{
polygonBuilder.AddPoint(p);
if (polygonBuilder.Parts.Count > 0 && polygonBuilder.Parts[0].Count > 0)
{
polygonGraphic.Geometry = polygonBuilder.ToGeometry();
lineMoveGraphic.Geometry = null;
}
}
},
(p) => //View tapped - completes task and returns point
{
tcs.SetResult(polygonBuilder.ToGeometry());
});
Action cleanup = () =>
{
cleanupEvents();
sceneView.GraphicsOverlays.Remove(sketchlayer);
};
cancellationToken.Register(() => tcs.SetCanceled());
Polygon result = null;
try
{
result = await tcs.Task;
}
finally
{
cleanup();
}
return result;
}
private void GeneratePolyGeometry()
{
//PolyCoordinates.ToList()
List<MapPoint> points = new List<MapPoint>();
foreach (CoordinateObject coordObject in PolyCoordinates)
{
points.Add(coordObject.MapPoint);
}
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
if (GeometryType == GeometryType.Polyline)
{
PolylineBuilder polylineBuilder = new PolylineBuilder(points);
polylineBuilder.HasZ = true;
MapGeometry = polylineBuilder.ToGeometry();
}
else if (GeometryType == GeometryType.Polygon)
{
PolygonBuilder polygonBuilder = new PolygonBuilder(points);
polygonBuilder.HasZ = true;
MapGeometry = polygonBuilder.ToGeometry();
}
});
}