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index.html
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<html>
<head>
<script src="https://aframe.io/releases/0.6.1/aframe.min.js"></script>
<script src="https://jeromeetienne.github.io/AR.js/aframe/build/aframe-ar.min.js"></script>
<script>THREEx.ArToolkitContext.baseURL = 'https://jeromeetienne.github.io/AR.js/three.js/'</script>
<script>
AFRAME.registerComponent('gps-position', {
watchId: null,
zeroCrd: null,
crd: null,
schema: {
accuracy: {
type: 'int',
default: 100
},
'zero-crd-latitude': {
type: 'number',
default: NaN
},
'zero-crd-longitude': {
type: 'number',
default: NaN
}
},
init: function () {
if(!isNaN(this.data['zero-crd-latitude']) && !isNaN(this.data['zero-crd-longitude'])){
this.zeroCrd = {latitude: this.data['zero-crd-latitude'], longitude: this.data['zero-crd-longitude']};
}
this.watchId = this.watchGPS(function(position){
this.crd = position.coords;
this.updatePosition();
}.bind(this));
},
watchGPS: function (success, error) {
if(typeof(error) == 'undefined')
error = function(err) { console.warn('ERROR('+err.code+'): '+err.message); };
if (!("geolocation" in navigator)){
error({code: 0, message: 'Geolocation is not supported by your browser'});
return;
}
return navigator.geolocation.watchPosition(success, error, {enableHighAccuracy: true, maximumAge: 0, timeout: 27000});
},
updatePosition: function () {
if(this.crd.accuracy > this.data.accuracy) return;
if(!this.zeroCrd) this.zeroCrd = this.crd;
var p = this.el.getAttribute('position');
p.x = this.calcMeters(
this.zeroCrd,
{
longitude: this.crd.longitude,
latitude: this.zeroCrd.latitude
}
) * (
this.crd.longitude > this.zeroCrd.longitude
? 1 : -1
);
p.z = this.calcMeters(
this.zeroCrd,
{
longitude: this.zeroCrd.longitude,
latitude: this.crd.latitude
}
) * (
this.crd.latitude > this.zeroCrd.latitude
? -1 : 1
);
this.el.setAttribute('position', p);
},
calcMeters: function(src, dest) {
var dlon = THREE.Math.degToRad(dest.longitude - src.longitude);
var dlat = THREE.Math.degToRad(dest.latitude - src.latitude);
var a = (Math.sin(dlat / 2) * Math.sin(dlat / 2)) + Math.cos(THREE.Math.degToRad(src.latitude)) * Math.cos(THREE.Math.degToRad(dest.latitude)) * (Math.sin(dlon / 2) * Math.sin(dlon / 2));
var angle = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
return angle * 6378160;
},
remove: function() {
if(this.watchId) navigator.geolocation.clearWatch(this.watchId);
this.watchId = null;
}
});
AFRAME.registerComponent('compass-rotation', {
lookControls: null,
lastTimestamp: 0,
heading: null,
schema: {
fixTime: {
type: 'int',
default: 2000
},
orientationEvent: {
type: 'string',
default: 'auto'
}
},
init: function () {
if(typeof(this.el.components['look-controls']) == 'undefined') return;
this.lookControls = this.el.components['look-controls'];
this.handlerOrientation = this.handlerOrientation.bind(this);
if(this.data.orientationEvent == 'auto'){
if('ondeviceorientationabsolute' in window){
this.data.orientationEvent = 'deviceorientationabsolute';
}else if('ondeviceorientation' in window){
this.data.orientationEvent = 'deviceorientation';
}else{
this.data.orientationEvent = '';
alert('Compass not supported');
return;
}
}
window.addEventListener(this.data.orientationEvent, this.handlerOrientation, false);
window.addEventListener('compassneedscalibration', function(event) {
alert('Your compass needs calibrating! Wave your device in a figure-eight motion');
event.preventDefault();
}, true);
},
tick: function (time, timeDelta) {
if(this.heading === null
|| this.lastTimestamp > (time - this.data.fixTime)) return;
this.lastTimestamp = time;
this.updateRotation();
},
calcCompassHeading: function (alpha, beta, gamma) {
// Convert degrees to radians
var alphaRad = alpha * (Math.PI / 180);
var betaRad = beta * (Math.PI / 180);
var gammaRad = gamma * (Math.PI / 180);
// Calculate equation components
var cA = Math.cos(alphaRad);
var sA = Math.sin(alphaRad);
var cB = Math.cos(betaRad);
var sB = Math.sin(betaRad);
var cG = Math.cos(gammaRad);
var sG = Math.sin(gammaRad);
// Calculate A, B, C rotation components
var rA = - cA * sG - sA * sB * cG;
var rB = - sA * sG + cA * sB * cG;
var rC = - cB * cG;
// Calculate compass heading
var compassHeading = Math.atan(rA / rB);
// Convert from half unit circle to whole unit circle
if(rB < 0) {
compassHeading += Math.PI;
}else if(rA < 0) {
compassHeading += 2 * Math.PI;
}
// Convert radians to degrees
compassHeading *= 180 / Math.PI;
return compassHeading;
},
handlerOrientation: function (evt) {
var heading = null;
//console.log('device orientation event', evt);
if(typeof(evt.webkitCompassHeading) != 'undefined'){
if(evt.webkitCompassAccuracy < 50){
heading = evt.webkitCompassHeading;
}else{
console.warn('webkitCompassAccuracy is evt.webkitCompassAccuracy');
}
}else if(evt.alpha !== null){
if(evt.absolute === true || typeof(evt.absolute == 'undefined')) {
heading = this.calcCompassHeading(evt.alpha, evt.beta, evt.gamma);
}else{
console.warn('evt.absolute === false');
}
}else{
console.warn('evt.alpha === null');
}
this.heading = heading;
},
updateRotation: function() {
/*
camera.components["look-controls"].yawObject.rotation.y = THREE.Math.degToRad(
(
360
- camera.components["compass-rotation"].heading
- (
camera.getAttribute('rotation').y
- THREE.Math.radToDeg(camera.components["look-controls"].yawObject.rotation.y)
)
)
% 360
)
*/
var heading = 360 - this.heading
var camera_rotation = this.el.getAttribute('rotation').y;
var yaw_rotation = THREE.Math.radToDeg(this.lookControls.yawObject.rotation.y);
var offset = ( heading - ( camera_rotation - yaw_rotation ) ) % 360;
this.lookControls.yawObject.rotation.y = THREE.Math.degToRad(offset);
},
remove: function () {
if(this.data.orientationEvent)
window.removeEventListener(this.data.orientationEvent, this.handlerOrientation, false);
}
});
AFRAME.registerComponent('gps-place', {
cameraGpsPosition: null,
deferredInitInterval: 0,
schema: {
latitude: {
type: 'number',
default: 0
},
longitude: {
type: 'number',
default: 0
},
cameraSelector: {
type: 'string',
default: 'a-camera, [camera]'
}
},
init: function () {
if(this.deferredInit()) return;
this.deferredInitInterval = setInterval(this.deferredInit.bind(this), 1000);
},
deferredInit: function () {
if(!this.cameraGpsPosition){
var camera = document.querySelector(this.data.cameraSelector);
if(typeof(camera.components['gps-position']) == 'undefined') return;
this.cameraGpsPosition = camera.components['gps-position'];
}
if(!this.cameraGpsPosition.zeroCrd) return;
this.updatePosition();
clearInterval(this.deferredInitInterval);
this.deferredInitInterval = 0;
return true;
},
updatePosition: function() {
var p = {x: 0, y: 0, z: 0};
p.x = this.cameraGpsPosition.calcMeters(
this.cameraGpsPosition.zeroCrd,
{
longitude: this.data.longitude,
latitude: this.cameraGpsPosition.zeroCrd.latitude
}
) * (
this.data.longitude > this.cameraGpsPosition.zeroCrd.longitude
? 1 : -1
);
p.z = this.cameraGpsPosition.calcMeters(
this.cameraGpsPosition.zeroCrd,
{
longitude: this.cameraGpsPosition.zeroCrd.longitude,
latitude: this.data.latitude
}
) * (
this.data.latitude > this.cameraGpsPosition.zeroCrd.latitude
? -1 : 1
);
this.el.setAttribute('position', p);
}
});
window.onload = function(){
var camera = document.getElementById('camera');
camera.addEventListener('componentchanged', function (evt) {
switch(evt.detail.name){
case 'rotation':
//console.log('camera rotation changed', evt.detail.newData);
var
compassRotation = camera.components['compass-rotation'],
lookControls = camera.components['look-controls']
;
camera_angle.innerText = evt.detail.newData.y;
if(lookControls){
yaw_angle.innerText = THREE.Math.radToDeg(lookControls.yawObject.rotation.y);
}
if(compassRotation){
compass_heading.innerText = compassRotation.heading;
}
break;
case 'position':
//console.log('camera position changed', evt.detail.newData);
var
gpsPosition = camera.components['gps-position']
;
camera_p_x.innerText = evt.detail.newData.x;
camera_p_z.innerText = evt.detail.newData.z;
if(gpsPosition){
if(gpsPosition.crd){
crd_longitude.innerText = gpsPosition.crd.longitude;
crd_latitude.innerText = gpsPosition.crd.latitude;
}
if(gpsPosition.zeroCrd){
zero_crd_longitude.innerText = gpsPosition.zeroCrd.longitude;
zero_crd_latitude.innerText = gpsPosition.zeroCrd.latitude;
}
}
break;
}
});
};
</script>
</head>
<body style='margin: 0px; overflow: hidden;'>
<div style="position: fixed; top: 10px; width:100%; text-align: center; z-index: 1; text-shadow: -1px 0 white, 0 1px white, 1px 0 white, 0 -1px white;">
<div>
coords: <span id="crd_longitude"></span>, <span id="crd_latitude"></span>
(zero coords: <span id="zero_crd_longitude"></span>, <span id="zero_crd_latitude"></span>)
</div>
<div>
camera coords: <span id="camera_p_x"></span>, <span id="camera_p_z"></span>
</div>
<div>
compass heading: <span id="compass_heading"></span>,
camera angle: <span id="camera_angle"></span>,
yaw angle: <span id="yaw_angle"></span>
</div>
</div>
<a-scene embedded artoolkit='sourceType: webcam;'><!-- -->
<a-camera id="camera" user-height="1.6" gps-position compass-rotation><!-- --></a-camera>
<a-sphere gps-place="longitude: 37.470155; latitude: 55.153565"></a-sphere>
<a-sphere gps-place="longitude: 37.469820; latitude: 55.153653"></a-sphere>
</a-scene>
</body>
</html>