Geolocation tracking with orientation example

This commit is contained in:
Pierre GIRAUD
2014-03-14 11:55:09 +01:00
parent 84463f59d4
commit 8e9ffb377e
13 changed files with 1028 additions and 16 deletions

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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../css/ol.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>Mobile Geolocation Tracking with Orientation</title>
<style type="text/css">
html, body, .map {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
}
#info {
position: absolute;
font-size: 0.7em;
top: 10px;
right: 10px;
background-color: lightgrey;
padding: 4px;
}
.button {
position: absolute;
bottom: 40px;
left: 10px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<div id="info"></div>
<img id="geolocation_marker" src="data/geolocation_marker.png" />
<div class="button">
<button id="geolocate">Geolocate Me!</button>
<button id="simulate">Simulate</button>
</div>
<script src="jquery.min.js" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
<script src="loader.js?id=geolocation-orientation" type="text/javascript"></script>
<div style="display: none;">
<div id="title">Geolocation tracking with orientation example</div>
<div id="shortdesc">Example of a geolocated and oriented map.</div>
<div id="tags">fullscreen, geolocation, orientation, mobile</div>
</div>
</body>
</html>

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goog.require('ol.Geolocation');
goog.require('ol.Map');
goog.require('ol.Overlay');
goog.require('ol.View2D');
goog.require('ol.geom.LineString');
goog.require('ol.layer.Tile');
goog.require('ol.proj');
goog.require('ol.source.OSM');
// creating the view
var view = new ol.View2D({
center: ol.proj.transform([5.8713, 45.6452], 'EPSG:4326', 'EPSG:3857'),
zoom: 19
});
// creating the map
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
target: 'map',
view: view
});
// Geolocation marker
var markerEl = document.getElementById('geolocation_marker');
var marker = new ol.Overlay({
positioning: 'center-center',
element: markerEl,
stopEvent: false
});
map.addOverlay(marker);
// LineString to store the different geolocation positions. This LineString
// is time aware.
// The Z dimension is actually used to store the rotation (heading).
var positions = new ol.geom.LineString([], 'XYZM');
// Geolocation Control
var geolocation = new ol.Geolocation(/** @type {olx.GeolocationOptions} */ ({
trackingOptions: {
maximumAge: 10000,
enableHighAccuracy: true,
timeout: 600000
}
}));
geolocation.bindTo('projection', view);
var deltaMean = 500; // the geolocation sampling period mean in ms
// Listen to position changes
geolocation.on('change', function(evt) {
var position = geolocation.getPosition();
var accuracy = geolocation.getAccuracy();
var heading = geolocation.getHeading() || 0;
var speed = geolocation.getSpeed() || 0;
var m = Date.now();
addPosition(position, heading, m, speed);
var coords = positions.getCoordinates();
var len = coords.length;
if (len >= 2) {
deltaMean = (coords[len - 1][3] - coords[0][3]) / (len - 1);
}
var html = [
'Position: ' + position[0].toFixed(2) + ', ' + position[1].toFixed(2),
'Accuracy: ' + accuracy,
'Heading: ' + Math.round(radToDeg(heading)) + '&deg;',
'Speed: ' + (speed * 3.6).toFixed(1) + ' km/h',
'Delta: ' + Math.round(deltaMean) + 'ms'
].join('<br />');
document.getElementById('info').innerHTML = html;
});
geolocation.on('error', function() {
alert('geolocation error');
// FIXME we should remove the coordinates in positions
});
// convert radians to degrees
function radToDeg(rad) {
return rad * 360 / (Math.PI * 2);
}
// convert degrees to radians
function degToRad(deg) {
return deg * Math.PI * 2 / 360;
}
// modulo for negative values
function mod(n) {
return ((n % (2 * Math.PI)) + (2 * Math.PI)) % (2 * Math.PI);
}
function addPosition(position, heading, m, speed) {
var x = position[0];
var y = position[1];
var fCoords = positions.getCoordinates();
var previous = fCoords[fCoords.length - 1];
var prevHeading = previous && previous[2];
if (prevHeading) {
var headingDiff = heading - mod(prevHeading);
// force the rotation change to be less than 180°
if (Math.abs(headingDiff) > Math.PI) {
var sign = (headingDiff >= 0) ? 1 : -1;
headingDiff = - sign * (2 * Math.PI - Math.abs(headingDiff));
}
heading = prevHeading + headingDiff;
}
positions.appendCoordinate([x, y, heading, m]);
// only keep the 20 last coordinates
positions.setCoordinates(positions.getCoordinates().slice(-20));
// FIXME use speed instead
if (heading && speed) {
markerEl.src = 'data/geolocation_marker_heading.png';
} else {
markerEl.src = 'data/geolocation_marker.png';
}
}
var previousM = 0;
// change center and rotation before render
map.beforeRender(function(map, frameState) {
if (frameState !== null) {
// use sampling period to get a smooth transition
var m = frameState.time - deltaMean * 1.5;
m = Math.max(m, previousM);
previousM = m;
// interpolate position along positions LineString
var c = positions.getCoordinateAtM(m, true);
var view = frameState.view2DState;
if (c) {
view.center = getCenterWithHeading(c, -c[2], view.resolution);
view.rotation = -c[2];
marker.setPosition(c);
}
}
return true; // Force animation to continue
});
// recenters the view by putting the given coordinates at 3/4 from the top or
// the screen
function getCenterWithHeading(position, rotation, resolution) {
var size = map.getSize();
var height = size[1];
return [
position[0] - Math.sin(rotation) * height * resolution * 1 / 4,
position[1] + Math.cos(rotation) * height * resolution * 1 / 4
];
}
// postcompose callback
function render() {
map.render();
}
// geolocate device
var geolocateBtn = document.getElementById('geolocate');
geolocateBtn.addEventListener('click', function() {
geolocation.setTracking(true); // Start position tracking
map.on('postcompose', render);
map.render();
disableButtons();
}, false);
// simulate device move
var simulationData;
$.getJSON('data/geolocation-orientation.json', function(data) {
simulationData = data.data;
});
var simulateBtn = document.getElementById('simulate');
simulateBtn.addEventListener('click', function() {
var coordinates = simulationData;
var first = coordinates.shift();
simulatePositionChange(first);
var prevDate = first.timestamp;
function geolocate() {
var position = coordinates.shift();
if (!position) {
return;
}
var newDate = position.timestamp;
simulatePositionChange(position);
window.setTimeout(function() {
prevDate = newDate;
geolocate();
}, (newDate - prevDate) / 0.5);
}
geolocate();
map.on('postcompose', render);
map.render();
disableButtons();
}, false);
function simulatePositionChange(position) {
var coords = position.coords;
geolocation.set('accuracy', coords.accuracy);
geolocation.set('heading', degToRad(coords.heading));
var position_ = [coords.longitude, coords.latitude];
var projectedPosition = ol.proj.transform(position_, 'EPSG:4326',
'EPSG:3857');
geolocation.set('position', projectedPosition);
geolocation.set('speed', coords.speed);
geolocation.dispatchChangeEvent();
}
function disableButtons() {
geolocateBtn.disabled = 'disabled';
simulateBtn.disabled = 'disabled';
}

View File

@@ -13,13 +13,14 @@ goog.require('ol.geom.flat.deflate');
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawPoint} center Center.
* @param {number=} opt_radius Radius.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.Circle = function(center, opt_radius, opt_layout) {
goog.base(this);
var radius = goog.isDef(opt_radius) ? opt_radius : 0;
this.setCenterAndRadius(center, radius, opt_layout);
this.setCenterAndRadius(center, radius,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.Circle, ol.geom.SimpleGeometry);

View File

@@ -15,7 +15,7 @@ goog.require('ol.geom.flat.simplify');
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawLinearRing} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.LinearRing = function(coordinates, opt_layout) {
@@ -34,7 +34,8 @@ ol.geom.LinearRing = function(coordinates, opt_layout) {
*/
this.maxDeltaRevision_ = -1;
this.setCoordinates(coordinates, opt_layout);
this.setCoordinates(coordinates,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.LinearRing, ol.geom.SimpleGeometry);

View File

@@ -18,7 +18,7 @@ goog.require('ol.geom.flat.simplify');
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawLineString} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.LineString = function(coordinates, opt_layout) {
@@ -49,7 +49,8 @@ ol.geom.LineString = function(coordinates, opt_layout) {
*/
this.maxDeltaRevision_ = -1;
this.setCoordinates(coordinates, opt_layout);
this.setCoordinates(coordinates,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.LineString, ol.geom.SimpleGeometry);

View File

@@ -18,7 +18,7 @@ goog.require('ol.geom.flat.simplify');
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawMultiLineString} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.MultiLineString = function(coordinates, opt_layout) {
@@ -43,7 +43,8 @@ ol.geom.MultiLineString = function(coordinates, opt_layout) {
*/
this.maxDeltaRevision_ = -1;
this.setCoordinates(coordinates, opt_layout);
this.setCoordinates(coordinates,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.MultiLineString, ol.geom.SimpleGeometry);

View File

@@ -16,12 +16,13 @@ goog.require('ol.math');
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawMultiPoint} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.MultiPoint = function(coordinates, opt_layout) {
goog.base(this);
this.setCoordinates(coordinates, opt_layout);
this.setCoordinates(coordinates,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.MultiPoint, ol.geom.SimpleGeometry);

View File

@@ -23,7 +23,7 @@ goog.require('ol.geom.flat.simplify');
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawMultiPolygon} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.MultiPolygon = function(coordinates, opt_layout) {
@@ -72,7 +72,8 @@ ol.geom.MultiPolygon = function(coordinates, opt_layout) {
*/
this.orientedFlatCoordinates_ = null;
this.setCoordinates(coordinates, opt_layout);
this.setCoordinates(coordinates,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.MultiPolygon, ol.geom.SimpleGeometry);

View File

@@ -13,12 +13,13 @@ goog.require('ol.math');
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawPoint} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.Point = function(coordinates, opt_layout) {
goog.base(this);
this.setCoordinates(coordinates, opt_layout);
this.setCoordinates(coordinates,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.Point, ol.geom.SimpleGeometry);

View File

@@ -22,7 +22,7 @@ goog.require('ol.geom.flat.simplify');
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {ol.geom.RawPolygon} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @param {ol.geom.GeometryLayout|string=} opt_layout Layout.
* @todo stability experimental
*/
ol.geom.Polygon = function(coordinates, opt_layout) {
@@ -71,7 +71,8 @@ ol.geom.Polygon = function(coordinates, opt_layout) {
*/
this.orientedFlatCoordinates_ = null;
this.setCoordinates(coordinates, opt_layout);
this.setCoordinates(coordinates,
/** @type {ol.geom.GeometryLayout|undefined} */ (opt_layout));
};
goog.inherits(ol.geom.Polygon, ol.geom.SimpleGeometry);