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device-orientation.js
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device-orientation.js
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goog.require('ol.DeviceOrientation');
goog.require('ol.Map');
goog.require('ol.View');
goog.require('ol.control');
goog.require('ol.layer.Tile');
goog.require('ol.proj');
goog.require('ol.source.OSM');
var projection = ol.proj.get('EPSG:3857');
var view = new ol.View({
center: [0, 0],
projection: projection,
extent: projection.getExtent(),
zoom: 2
});
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
target: 'map',
controls: ol.control.defaults({
attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
collapsible: false
})
}),
view: view
});
var deviceOrientation = new ol.DeviceOrientation();
function el(id) {
return document.getElementById(id);
}
el('track').addEventListener('change', function() {
deviceOrientation.setTracking(this.checked);
});
deviceOrientation.on('change', function() {
el('alpha').innerText = deviceOrientation.getAlpha() + ' [rad]';
el('beta').innerText = deviceOrientation.getBeta() + ' [rad]';
el('gamma').innerText = deviceOrientation.getGamma() + ' [rad]';
el('heading').innerText = deviceOrientation.getHeading() + ' [rad]';
});
// tilt the map
deviceOrientation.on(['change:beta', 'change:gamma'], function(event) {
var center = view.getCenter();
var resolution = view.getResolution();
var beta = event.target.getBeta() || 0;
var gamma = event.target.getGamma() || 0;
center[0] -= resolution * gamma * 25;
center[1] += resolution * beta * 25;
view.setCenter(view.constrainCenter(center));
});