EllipticArcSegment in SceneView

Question

我想在SceneView中创建一个弧形。人们告诉我我必须使用EllipticArcSegment，它在MapView中工作，但我可以在SceneView中使用它。当我在EllipticArcSegment中使用ScenView时，我会得到一条线，而不是一条弧线。看这张照片。

public MainWindow()
{
InitializeComponent();
MySceneView.Scene = new Scene(BasemapStyle.ArcGISImageryStandard);
MyMapView.Map = new Map(BasemapStyle.ArcGISTopographic);

MapPoint _spain = new MapPoint(-4.00475, 40.637861, SpatialReferences.Wgs84);
Graphic _arc = CreateArc(_spain, 0.080, 90.0, 45.0);
Graphic _arc1 = CreateArc(_spain, 0.080, 90.0, 45.0);
_AiminginZone_GO.Graphics.Add(_arc);
_AiminginZone_GO1.Graphics.Add(_arc1);
MyMapView.GraphicsOverlays.Add(_AiminginZone_GO);
MySceneView.GraphicsOverlays.Add(_AiminginZone_GO1);
}

private Graphic CreateArc(MapPoint center, double radius, double arcAngle, double azimuth)
{

_AiminginZone_GO.Graphics.Clear();
_AiminginZone_GO1.Graphics.Clear();
// set up spatial references
SpatialReference wgs84 = SpatialReferences.Wgs84;
SpatialReference webMercator = SpatialReferences.WebMercator;
// make a point in lat/long (WGS84)
MapPoint centrePoint = new MapPoint(center.X, center.Y, 56, wgs84);
MapPoint centrePoint1 = new MapPoint(center.X+0.05, center.Y, 56, wgs84);
// project it to a mercator projection where the unit of measure is metres
MapPoint mercatorPoint = (MapPoint)GeometryEngine.Project(centrePoint, webMercator);
// create an arc segment which is 50Kilometers radius, starting at 90 degrees, the arc angle is 45 degrees clockwise
//EllipticArcSegment arcSegment = new EllipticArcSegment(centrePoint, mercatorPoint, (Math.PI / 180) * 90, true, true, (Math.PI / 180) * 90, (Math.PI / 180) * -45, wgs84);
EllipticArcSegment arcSegment = EllipticArcSegment.CreateCircularEllipticArc(mercatorPoint, 50000, (Math.PI / 180) * 90, (Math.PI / 180) * -45, webMercator);

// make a part with the segment
Part part = new Part(webMercator);
part.Add(arcSegment);

// create the line from the part
Polyline line = new Polyline(part);

// add it to a graphic and graphics overlay to allow us to visualise it
var polylineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Dash, System.Drawing.Color.Red, 3.0);
Graphic arcGraphic = new Graphic(line, polylineSymbol);
return arcGraphic;
}

在这里输入图像描述

Answer 1

有一个错误使用EllipticArcSegment.CreateCircularEllipticArc，请参阅链接有更多的信息格式。在这里输入链接描述