Distance composite symbol

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Sample viewer app

Change a graphic's symbol based on the camera's proximity to it.

Image of distance composite symbol

Use case

When showing dense datasets, it is beneficial to reduce the detail of individual points when zooming out to avoid visual clutter and to avoid data points overlapping and obscuring each other.

How to use the sample

The sample starts looking at a plane. Zoom out from the plane to see it turn into a cone. Keeping zooming out and it will turn into a point.

How it works

  1. Create a GraphicsOverlay object and add it to a SceneView object.
  2. Create a DistanceCompositeSceneSymbol object.
  3. Create DistanceCompositeSceneSymbol.Range objects specifying a Symbol and the min and max distance within which the symbol should be visible.
  4. Add the ranges to the range collection of the distance composite scene symbol.
  5. Create a Graphic object with the distance composite scene symbol at a location and add it to the graphics overlay.

Relevant API

  • DistanceCompositeSceneSymbol
  • DistanceCompositeSceneSymbol.Range

Tags

3D, data, graphic

Sample Code

DistanceCompositeSymbolSample.java
                                                                                                                                           
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/*
 * Copyright 2017 Esri.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.esri.samples.distance_composite_symbol;

import java.io.File;

import com.esri.arcgisruntime.mapping.view.OrbitGeoElementCameraController;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.ArcGISTiledElevationSource;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Surface;
import com.esri.arcgisruntime.mapping.view.Camera;
import com.esri.arcgisruntime.mapping.view.Graphic;
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
import com.esri.arcgisruntime.mapping.view.LayerSceneProperties;
import com.esri.arcgisruntime.mapping.view.SceneView;
import com.esri.arcgisruntime.symbology.DistanceCompositeSceneSymbol;
import com.esri.arcgisruntime.symbology.ModelSceneSymbol;
import com.esri.arcgisruntime.symbology.SceneSymbol.AnchorPosition;
import com.esri.arcgisruntime.symbology.SimpleMarkerSceneSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;

public class DistanceCompositeSymbolSample extends Application {

  private SceneView sceneView;
  private static final String ELEVATION_IMAGE_SERVICE =
      "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer";

  @Override
  public void start(Stage stage) {

    try {

      // create stack pane and JavaFX app scene
      StackPane stackPane = new StackPane();
      Scene fxScene = new Scene(stackPane);

      // set title, size, and add JavaFX scene to stage
      stage.setTitle("Distance Composite Symbol Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(fxScene);
      stage.show();

      // create a scene and add a basemap to it
      ArcGISScene scene = new ArcGISScene();
      scene.setBasemap(Basemap.createImagery());

      // add the SceneView to the stack pane
      sceneView = new SceneView();
      sceneView.setArcGISScene(scene);
      stackPane.getChildren().addAll(sceneView);

      // add base surface for elevation data
      Surface surface = new Surface();
      surface.getElevationSources().add(new ArcGISTiledElevationSource(ELEVATION_IMAGE_SERVICE));
      scene.setBaseSurface(surface);

      // add a graphics overlay
      GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
      graphicsOverlay.getSceneProperties().setSurfacePlacement(LayerSceneProperties.SurfacePlacement.RELATIVE);
      sceneView.getGraphicsOverlays().add(graphicsOverlay);

      // set up the different symbols
      int red = 0xFFFF0000;
      SimpleMarkerSymbol circleSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE, red, 10);
      SimpleMarkerSceneSymbol coneSymbol = SimpleMarkerSceneSymbol.createCone(red, 3, 10);
      coneSymbol.setPitch(-90);
      coneSymbol.setAnchorPosition(AnchorPosition.CENTER);
      String modelURI = new File(System.getProperty("data.dir"), "./samples-data/bristol/Collada/Bristol.dae").getAbsolutePath();
      ModelSceneSymbol modelSymbol = new ModelSceneSymbol(modelURI, 1.0);
      modelSymbol.loadAsync();

      // set up the distance composite symbol
      DistanceCompositeSceneSymbol compositeSymbol = new DistanceCompositeSceneSymbol();
      compositeSymbol.getRangeCollection().add(new DistanceCompositeSceneSymbol.Range(modelSymbol, 0, 100));
      compositeSymbol.getRangeCollection().add(new DistanceCompositeSceneSymbol.Range(coneSymbol, 100, 500));
      compositeSymbol.getRangeCollection().add(new DistanceCompositeSceneSymbol.Range(circleSymbol, 500, 0));

      // create graphic
      Point aircraftPosition = new Point(-2.708471, 56.096575, 5000, SpatialReferences.getWgs84());
      Graphic aircraftGraphic = new Graphic(aircraftPosition, compositeSymbol);
      // add graphic to graphics overlay
      graphicsOverlay.getGraphics().add(aircraftGraphic);

      // add an orbit camera controller to lock the camera to the graphic
      OrbitGeoElementCameraController cameraController = new OrbitGeoElementCameraController(aircraftGraphic, 20);
      cameraController.setCameraPitchOffset(80);
      cameraController.setCameraHeadingOffset(-30);
      sceneView.setCameraController(cameraController);
    } catch (Exception e) {
      // on any error, display the stack trace.
      e.printStackTrace();
    }
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() {

    if (sceneView != null) {
      sceneView.dispose();
    }
  }

  /**
   * Opens and runs application.
   *
   * @param args arguments passed to this application
   */
  public static void main(String[] args) {

    Application.launch(args);
  }

}

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