The globe camera controller (the default camera controller in all new scenes) allows a user to explore the scene freely by zooming in/out and panning around the globe. The orbit camera controllers fix the camera to look at a target location or geoelement. A primary use case is for following moving objects like cars and planes.
How to use the sample
The application loads with the default globe camera controller. To rotate and fix the scene around the plane, exit globe mode by choosing the "Orbit camera around plane" option (i.e. camera will now be fixed to the plane). Choose the "Orbit camera around location" option to rotate and center the scene around the location of the Upheaval Dome crater structure, or choose the "Free pan round the globe" option to return to default free navigation.
How it works
Create an instance of a class extending CameraController: GlobeCameraController, OrbitLocationCameraController, OrbitGeoElementCameraController.
Set the scene view's camera controller with sceneView.setCameraController(cameraController).
Relevant API
ArcGISScene
Camera
GlobeCameraController
OrbitGeoElementCameraController
OrbitLocationCameraController
SceneView
Tags
3D, camera, camera controller
Sample Code
MainActivity.java
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/*
* Copyright 2019 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.arcgisruntime.sample.choosecameracontroller;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import android.content.res.AssetManager;
import android.os.Bundle;
import androidx.core.content.ContextCompat;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
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.BasemapStyle;
import com.esri.arcgisruntime.mapping.Surface;
import com.esri.arcgisruntime.mapping.view.Camera;
import com.esri.arcgisruntime.mapping.view.GlobeCameraController;
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.OrbitGeoElementCameraController;
import com.esri.arcgisruntime.mapping.view.OrbitLocationCameraController;
import com.esri.arcgisruntime.mapping.view.SceneView;
import com.esri.arcgisruntime.symbology.ModelSceneSymbol;
publicclassMainActivityextendsAppCompatActivity{
privatestaticfinal String TAG = MainActivity.class.getSimpleName();
private SceneView mSceneView;
private Graphic mPlane3D;
private GraphicsOverlay mSceneOverlay;
private OrbitGeoElementCameraController mOrbitPlaneCameraController;
private OrbitLocationCameraController mOrbitLocationCameraController;
@OverrideprotectedvoidonCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// authentication with an API key or named user is required to access basemaps and other// location services ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY);
// load plane model from assets into cache directory copyFileFromAssetsToCache(getString(R.string.bristol_model));
copyFileFromAssetsToCache(getString(R.string.bristol_skin));
setupToolbar();
// create a scene and add it to the scene view mSceneView = findViewById(R.id.sceneView);
ArcGISScene scene = new ArcGISScene(BasemapStyle.ARCGIS_IMAGERY);
mSceneView.setScene(scene);
// add base surface for elevation data Surface surface = new Surface();
ArcGISTiledElevationSource elevationSource = new ArcGISTiledElevationSource(
getString(R.string.world_elevation_service_url));
surface.getElevationSources().add(elevationSource);
scene.setBaseSurface(surface);
// create a graphics overlay for the scene mSceneOverlay = new GraphicsOverlay();
mSceneOverlay.getSceneProperties().setSurfacePlacement(LayerSceneProperties.SurfacePlacement.ABSOLUTE);
mSceneView.getGraphicsOverlays().add(mSceneOverlay);
// create a camera and set it as the viewpoint for when the scene loads Camera camera = new Camera(38.459291, -109.937576, 5500, 150.0, 20.0, 0.0);
mSceneView.setViewpointCamera(camera);
// instantiate a new camera controller which orbits a target location Point locationPoint = new Point(-109.929589, 38.437304, 1700, SpatialReferences.getWgs84());
mOrbitLocationCameraController = new OrbitLocationCameraController(locationPoint, 5000);
mOrbitLocationCameraController.setCameraPitchOffset(3);
mOrbitLocationCameraController.setCameraHeadingOffset(150);
loadModel().addDoneLoadingListener(() -> {
// instantiate a new camera controller which orbits the plane at a set distance mOrbitPlaneCameraController = new OrbitGeoElementCameraController(mPlane3D, 100.0);
mOrbitPlaneCameraController.setCameraPitchOffset(30);
mOrbitPlaneCameraController.setCameraHeadingOffset(150);
});
}
privatevoidsetupToolbar(){
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setOverflowIcon(ContextCompat.getDrawable(this, R.drawable.ic_photo_camera));
}
@OverridepublicbooleanonCreateOptionsMenu(Menu menu){
getMenuInflater().inflate(R.menu.camera_controller_menu, menu);
returnsuper.onCreateOptionsMenu(menu);
}
@OverridepublicbooleanonOptionsItemSelected(MenuItem item){
int itemid = item.getItemId();
if (itemid == R.id.action_camera_controller_plane) {
mSceneView.setCameraController(mOrbitPlaneCameraController);
returntrue;
} elseif (itemid == R.id.action_camera_controller_crater) {
mSceneView.setCameraController(mOrbitLocationCameraController);
returntrue;
} elseif (itemid == R.id.action_camera_controller_globe) {
mSceneView.setCameraController(new GlobeCameraController());
returntrue;
}
returnsuper.onOptionsItemSelected(item);
}
/**
* Load the plane model from the cache, use to construct a Model Scene Symbol and add it to the scene's graphic overlay.
*/private ModelSceneSymbol loadModel(){
// create a graphic with a ModelSceneSymbol of a plane to add to the scene String pathToModel = getCacheDir() + File.separator + getString(R.string.bristol_model);
ModelSceneSymbol plane3DSymbol = new ModelSceneSymbol(pathToModel, 1.0);
plane3DSymbol.setHeading(45);
mPlane3D = new Graphic(new Point(-109.937516, 38.456714, 5000, SpatialReferences.getWgs84()), plane3DSymbol);
mSceneOverlay.getGraphics().add(mPlane3D);
return plane3DSymbol;
}
/**
* Copy the given file from the app's assets folder to the app's cache directory.
*
* @param fileName as String
*/privatevoidcopyFileFromAssetsToCache(String fileName){
AssetManager assetManager = getApplicationContext().getAssets();
File file = new File(getCacheDir() + File.separator + fileName);
if (!file.exists()) {
try {
BufferedInputStream bis = new BufferedInputStream(assetManager.open(fileName));
BufferedOutputStream bos = new BufferedOutputStream(
new FileOutputStream(getCacheDir() + File.separator + fileName));
byte[] buffer = newbyte[bis.available()];
int read = bis.read(buffer);
while (read != -1) {
bos.write(buffer, 0, read);
read = bis.read(buffer);
}
bos.close();
bis.close();
Log.i(TAG, fileName + " copied to cache.");
} catch (Exception e) {
Log.e(TAG, "Error writing " + fileName + " to cache. " + e.getMessage());
}
} else {
Log.i(TAG, fileName + " already in cache.");
}
}
@OverrideprotectedvoidonResume(){
super.onResume();
mSceneView.resume();
}
@OverrideprotectedvoidonPause(){
mSceneView.pause();
super.onPause();
}
@OverrideprotectedvoidonDestroy(){
mSceneView.dispose();
super.onDestroy();
}
}