Update Add Graphics Renderer sample to include ellipse shaped polygon (#672)

* update sample to include ellipse shaped polygon

* address review comments

Author: Rachael-E

display_information/add-graphics-with-renderer/AddGraphicsWithRenderer.png

@@ -24,7 +24,9 @@ Pan and zoom on the map to view graphics for points, lines, and polygons (includ
 
 * CubicBezierSegment
 * EllipticArcSegment
+* GeodesicEllipseParameters
 * Geometry
+* GeometryEngine
 * Graphic
 * GraphicsOverlay
 * Part
@@ -41,4 +43,4 @@ To set unique symbols across a number of graphics (e.g. showing graphics of indi
 
 ## Tags
 
-arc, bezier, curve, display, graphics, marker, overlay, renderer, segment, symbol, true curve
+arc, bezier, curve, display, ellipse, graphics, marker, overlay, renderer, segment, symbol, true curve

display_information/add-graphics-with-renderer/README.md

@@ -10,6 +10,7 @@
         "bezier",
         "curve",
         "display",
+        "ellipse",
         "graphics",
         "marker",
         "overlay",
@@ -19,7 +20,9 @@
         "true curve",
         "CubicBezierSegment",
         "EllipticArcSegment",
+        "GeodesicEllipseParameters",
         "Geometry",
+        "GeometryEngine",
         "Graphic",
         "GraphicsOverlay",
         "Part",
@@ -36,7 +39,9 @@
     "relevant_apis": [
         "CubicBezierSegment",
         "EllipticArcSegment",
+        "GeodesicEllipseParameters",
         "Geometry",
+        "GeometryEngine",
         "Graphic",
         "GraphicsOverlay",
         "Part",

display_information/add-graphics-with-renderer/README.metadata.json

@@ -17,11 +17,19 @@
 package com.esri.samples.add_graphics_with_renderer;
 
 import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
+import com.esri.arcgisruntime.geometry.AngularUnit;
+import com.esri.arcgisruntime.geometry.AngularUnitId;
 import com.esri.arcgisruntime.geometry.CubicBezierSegment;
 import com.esri.arcgisruntime.geometry.EllipticArcSegment;
+import com.esri.arcgisruntime.geometry.GeodesicEllipseParameters;
 import com.esri.arcgisruntime.geometry.Geometry;
+import com.esri.arcgisruntime.geometry.GeometryEngine;
+import com.esri.arcgisruntime.geometry.GeometryType;
+import com.esri.arcgisruntime.geometry.LinearUnit;
+import com.esri.arcgisruntime.geometry.LinearUnitId;
 import com.esri.arcgisruntime.geometry.Part;
 import com.esri.arcgisruntime.geometry.Point;
+import com.esri.arcgisruntime.geometry.Polygon;
 import com.esri.arcgisruntime.geometry.PolygonBuilder;
 import com.esri.arcgisruntime.geometry.PolylineBuilder;
 import com.esri.arcgisruntime.geometry.SpatialReference;
@@ -136,6 +144,15 @@ public void start(Stage stage) {
       curvedGraphicOverlay.getGraphics().add(heartGraphic);
       mapView.getGraphicsOverlays().add(curvedGraphicOverlay);
 
+      // purple ellipse polygon graphic
+      GraphicsOverlay ellipseGraphicOverlay = new GraphicsOverlay();
+      SimpleFillSymbol ellipseSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, ColorUtil.colorToArgb(Color.PURPLE), null);
+      SimpleRenderer ellipseRenderer = new SimpleRenderer(ellipseSymbol);
+      ellipseGraphicOverlay.setRenderer(ellipseRenderer);
+      Graphic ellipseGraphic = new Graphic(makeEllipse());
+      ellipseGraphicOverlay.getGraphics().add(ellipseGraphic);
+      mapView.getGraphicsOverlays().add(ellipseGraphicOverlay);
+
       // add the map view to stack pane
       stackPane.getChildren().add(mapView);
 
@@ -194,6 +211,29 @@ private Geometry makeHeartGeometry(Point centerOfHeart) {
     return heartShape.toGeometry();
   }
 
+  /**
+   * Create an ellipse shaped polygon.
+   *
+   * @return ellipse shaped polygon
+   */
+  private Polygon makeEllipse() {
+    // create and set all the parameters so that the ellipse has a major axis of 400 kilometres,
+    // a minor axis of 200 kilometres and is rotated at an angle of -45 degrees.
+    GeodesicEllipseParameters parameters = new GeodesicEllipseParameters();
+
+    parameters.setCenter(new Point(40e5,25e5, SpatialReferences.getWebMercator()));
+    parameters.setGeometryType(GeometryType.POLYGON);
+    parameters.setSemiAxis1Length(200);
+    parameters.setSemiAxis2Length(400);
+    parameters.setAxisDirection(-45);
+    parameters.setMaxPointCount(100);
+    parameters.setAngularUnit(new AngularUnit(AngularUnitId.DEGREES));
+    parameters.setLinearUnit(new LinearUnit(LinearUnitId.KILOMETERS));
+    parameters.setMaxSegmentLength(20);
+
+    return (Polygon) GeometryEngine.ellipseGeodesic(parameters);
+  }
+
   /**
    * Stops and releases all resources used in application.
    */