How to draw a circle with given radius and center in given coordinates?

VanyaIvanov

How to draw a circle using Arcgis Java SDK on the arcgis Scene?

MarkBaird

The Buffer operation will help you here:

https://developers.arcgis.com/java/api-reference/reference/com/esri/arcgisruntime/geometry/GeometryEngine.html#buffer(com.esri.arcgisruntime.geometry.Geometry,double)

However you need to be careful when using this in 3D if your location is in WGS84 (latitude / longitude) as the buffer used the unit of measure associated with the spatial reference of your point.  This will be in degrees is its WGS84 and you may wonder why your buffers are quite large!

The trick is to work in a Projected Coordinate system for this so you can use metres as your unit of measure.  So imagine you've got a point collected from a click even on your scene, you would convert this before using a buffer:

              // get the point as a web mercator point 
              Point mapPoint = (Point) GeometryEngine.project( wgs84Point, SpatialReferences.getWebMercator());
              System.out.println("SR : " + mapPoint.getSpatialReference().getWKText());

              // 500 metre buffer
              Polygon polygon =GeometryEngine.buffer(mapPoint, 500);

              // some styles
              SimpleLineSymbol simpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0xFF00FF00, 3);
              SimpleFillSymbol simpleFillSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, 0xFFFF0000, simpleLineSymbol);

              // make a graphic and draw it!
              Graphic graphic = new Graphic(polygon, simpleFillSymbol);
              graphicsOverlay.getGraphics().add(graphic);

 

Does this help?