WebWorldWind/examples/GoToLocation.js

/*
 * Copyright (C) 2014 United States Government as represented by the Administrator of the
 * National Aeronautics and Space Administration. All Rights Reserved.
 */
/**
 * Illustrates how to use a GoToAnimator to smoothly move the view to a new location. This example listens for
 * terrain picks and moves the view to the location picked.
 *
 * @version $Id: GoToLocation.js 3320 2015-07-15 20:53:05Z dcollins $
 */

requirejs(['../src/WorldWind',
        './LayerManager'],
    function (ww,
              LayerManager) {
        "use strict";

        // Tell World Wind to log only warnings.
        WorldWind.Logger.setLoggingLevel(WorldWind.Logger.LEVEL_WARNING);

        // Create the World Window.
        var wwd = new WorldWind.WorldWindow("canvasOne");

        /**
         * Added imagery layers.
         */
        var layers = [
            {layer: new WorldWind.BMNGLayer(), enabled: true},
            {layer: new WorldWind.BingAerialWithLabelsLayer(null), enabled: true},
            {layer: new WorldWind.OpenStreetMapImageLayer(null), enabled: false},
            {layer: new WorldWind.CompassLayer(), enabled: true},
            {layer: new WorldWind.CoordinatesDisplayLayer(wwd), enabled: true},
            {layer: new WorldWind.ViewControlsLayer(wwd), enabled: true}
        ];

        for (var l = 0; l < layers.length; l++) {
            layers[l].layer.enabled = layers[l].enabled;
            wwd.addLayer(layers[l].layer);
        }

        // Create a layer manager for controlling layer visibility.
        var layerManger = new LayerManager(wwd);

        // Now set up to handle clicks and taps.

        // The common gesture-handling function.
        var handleClick = function (recognizer) {
            // Obtain the event location.
            var x = recognizer.clientX,
                y = recognizer.clientY;

            // Perform the pick. Must first convert from window coordinates to canvas coordinates, which are
            // relative to the upper left corner of the canvas rather than the upper left corner of the page.
            var pickList = wwd.pick(wwd.canvasCoordinates(x, y));

            // If only one thing is picked and it is the terrain, tell the world window to go to the picked location.
            if (pickList.objects.length == 1 && pickList.objects[0].isTerrain) {
                var position = pickList.objects[0].position;
                wwd.goTo(new WorldWind.Location(position.latitude, position.longitude));
            }
        };

        // Listen for mouse clicks.
        var clickRecognizer = new WorldWind.ClickRecognizer(wwd, handleClick);

        // Listen for taps on mobile devices.
        var tapRecognizer = new WorldWind.TapRecognizer(wwd, handleClick);
    });