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example_onigo.html
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<!DOCTYPE html>
<html>
<head>
<title>Geolocation</title>
<link rel="stylesheet" href="https://openlayers.org/en/v4.6.4/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v4.6.4/build/ol.js"></script>
</head>
<body>
<div id="map" class="map" style="max-width:800px"></div>
<div id="info" style="display: none;"></div>
<!-- <label for="track">
track position
<input id="track" type="checkbox"/>
</label>
-->
<p>
Tags:
<div id="geotags1" class="section-container">
<p>You've found Camden Town Hall, now find the Auditorium!</p>
</div>
<div id="geotags2" class="section-container">
<p>
You've found the auditorium! Now go to the small park on the way to Brunswick Square.
</p>
</div>
<div id="geotags3" class="section-container">
<p>
You found the small park! Now go to Brunswick Square.
</p>
</div>
<div id="geotags4" class="section-container">
<p>
Well done - you've completed the mini-adventure!
</p>
</div>
</p>
<p>
position long : <code id="pos-lon"></code>
<br> position lat : <code id="pos-lat"></code> <br> position accuracy : <code id="accuracy"></code> <br> altitude : <code id="altitude"></code> <br> altitude accuracy : <code id="altitudeAccuracy"></code> <br> heading : <code id="heading"></code> <br> speed : <code id="speed"></code>
</p>
<script src="geofencing.js"></script>
<script>
var wgs84Proj = new ol.proj.Projection({ code : "EPSG:4326" });
var origProj = new ol.proj.Projection({ code : "EPSG:3857" });
var london = ol.proj.transform([-0.1256312, 51.5286883], wgs84Proj, origProj);
var view = new ol.View({
center: london,
zoom: 16
});
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
target: 'map',
controls: ol.control.defaults({
attributionOptions: {
collapsible: false
}
}),
view: view
});
var geolocation = new ol.Geolocation({
projection: view.getProjection(),
tracking: true,
trackingOptions: {
enableHighAccuracy: true,
// Maximum age in milliseconds
maximumAge: 1000,
// Timeout in milliseconds. Default is 5
timeout: 5000
}
});
function el(id) {
return document.getElementById(id);
}
// update the HTML page when the position changes.
geolocation.on('change', function() {
console.log("Location changed");
var coordinates = geolocation.getPosition();
el('pos-lon').innerText = coordinates[0];
el('pos-lat').innerText = coordinates[1];
el('accuracy').innerText = geolocation.getAccuracy() + ' [m]';
el('altitude').innerText = geolocation.getAltitude() + ' [m]';
el('altitudeAccuracy').innerText = geolocation.getAltitudeAccuracy() + ' [m]';
el('heading').innerText = geolocation.getHeading() + ' [rad]';
el('speed').innerText = geolocation.getSpeed() + ' [m/s]';
});
// handle geolocation error.
geolocation.on('error', function(error) {
var info = document.getElementById('info');
info.innerHTML = error.message;
info.style.display = '';
});
var accuracyFeature = new ol.Feature();
geolocation.on('change:accuracyGeometry', function() {
accuracyFeature.setGeometry(geolocation.getAccuracyGeometry());
});
var positionFeature = new ol.Feature();
positionFeature.setStyle(new ol.style.Style({
image: new ol.style.Circle({
radius: 6,
fill: new ol.style.Fill({
color: '#3399CC'
}),
stroke: new ol.style.Stroke({
color: '#fff',
width: 2
})
})
}));
geolocation.on('change:position', function() {
if (geolocation.getAccuracy() < 50) {
var coordinates = geolocation.getPosition();
positionFeature.setGeometry(coordinates ?
new ol.geom.Point(coordinates) : null);
}
});
new ol.layer.Vector({
map: map,
source: new ol.source.Vector({
features: [accuracyFeature, positionFeature]
})
});
// Do some geofencing
function hideSections() {
// Function that hides all sections, by setting display to none
var sections = document.getElementsByClassName('section-container');
Array.prototype.filter.call(sections, function(sectionDiv){
sectionDiv.style.display = "none";
});
};
hideSections();
// Camden Town hall coordinates
var polyCoord = [
{
"name": "Camden Town Hall",
"coordinates": [[-0.12591898441314694, 51.52897769699999],
[-0.1256453990936279, 51.52869068786285],
[-0.12476563453674312, 51.52904444305162],
[-0.12504994869232175, 51.529331449958704],
[-0.12591898441314694, 51.52897769699999]],
"function_inside": () => {
console.log("Camden Town Hall function_inside");
hideSections();
el('geotags1').style.display = "block";
},
},
{
"name": "Auditorium",
"coordinates": [[-0.1254254579544067, 51.52918127215159],
[-0.12511432170867917, 51.52890427623015],
[-0.1247763633728027, 51.52903776845085],
[-0.12504994869232175, 51.52932811267945],
[-0.1254254579544067, 51.52918127215159]],
"function_inside": () => {
console.log("Auditorium function_inside");
hideSections();
el('geotags2').style.display = "block";
},
},
{
"name": "Small Park",
"coordinates": [[-0.12417018413543701, 51.52708540572499],
[-0.12396097183227538, 51.52669492313336],
[-0.12303292751312254, 51.526885158660434],
[-0.1230865716934204, 51.52697193249654],
[-0.12317776679992674, 51.52696859504434],
[-0.1233386993408203, 51.52733237589169],
[-0.12358546257019042, 51.527295664194924],
[-0.12354791164398193, 51.52723559044546],
[-0.12417018413543701, 51.52708540572499],
],
"function_inside": () => {
console.log("Small Park function_inside");
hideSections();
el('geotags3').style.display = "block";
}
},
{
"name": "Brunswick Square",
"coordinates": [[-0.12281298637390137, 51.52472577186194],
[-0.12251794338226318, 51.52422846425853],
[-0.12229800224304198, 51.52400150327881],
[-0.12187957763671872, 51.523854645571504],
[-0.1209515333175659, 51.5240248669613],
[-0.1214611530303955, 51.52493937882949],
[-0.12281298637390137, 51.52472577186194]],
"function_inside": () => {
console.log("Brunswick function_inside");
hideSections();
el('geotags4').style.display = "block";
},
}
]
// Create a polygon out of the coordinates
// Add the polygon to a collection of features
var polyFeatures = [];
var polygon;
for(var i = 0; i < polyCoord.length; i++) {
polygon = coordinatesToPolygon(polyCoord[i].coordinates, projection=origProj);
polyCoord[i].polygon = polygon;
polyFeatures.push(new ol.Feature({geometry: polygon}));
}
// Add the polygons to the map
new ol.layer.Vector({
map: map,
source: new ol.source.Vector({
features: polyFeatures,
})
});
// Update the geotag depending on location
geolocation.on('change:position', function() {
if(polyCoord.length === 0) {
return
} else {
// First work out whether the current user location is in the first polygon
// This should probably also include a check for the accuracy of the location.
var pointInPoly = inside(geolocation.getPosition(), polyCoord[0].polygon.getCoordinates()[0]);
// This if should probably include a check to see if the previous point in the series of triggers has been checked.
// If we're in the zone, fire our function!
if(pointInPoly) {
var func = polyCoord[0].function_inside;
} else {
var func = polyCoord[0].function_outside;
}
// If we found a function, call it
if(func !== undefined) {
func();
};
// If we triggered the next adventure, pop the polyCoord
if(pointInPoly) {
polyCoord.shift();
}
}
});
// The function we call when we hit the auditorium. The meet of the function will only ever be run once - clever!
// This is a javascript closure.
var auditoriumFunction = (function() {
// Instead of having a variable that might be lost on page refresh, check local storage instead.
var evaluated = false;
return function() {
if(evaluated === false) {
// Now do whatever you want when you get to the zone.
el('geotags2').innerHTML = "You found the auditorium!";
console.log("Changing auditorium message");
// And don't forget to set evaluated to true so we don't go round again
evaluated = true;
}
}
})();
</script>
</body>
</html>