WebWorldWind/examples/GoToLocation.js

/*
 * Copyright 2015-2017 WorldWind Contributors
 *
 * 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.
 */
/**
 * 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.
 */
requirejs(['./WorldWindShim',
        './LayerManager'],
    function (WorldWind,
              LayerManager) {
        "use strict";

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

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

        // Create and add layers to the WorldWindow.
        var layers = [
            // Imagery layers.
            {layer: new WorldWind.BMNGLayer(), enabled: true},
            {layer: new WorldWind.BingAerialWithLabelsLayer(null), enabled: true},
            // WorldWindow UI layers.
            {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 layerManager = 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 WorldWindow 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);
    });