Interface LocationService

The LocationService allows the user to provide their location to lens applications if they so desire. For privacy reasons, the user is asked for permission to report location information.

Example

//@input Asset.MapModule mapModule

// Create location handler
var locationService = GeoLocation.createLocationService();

// Set the accuracy
locationService.accuracy = GeoLocationAccuracy.Navigation;

// Get users location.
locationService.getCurrentPosition(
    function(geoPosition) {
        global.lat = geoPosition.latitude;
        global.lng = geoPosition.longitude;
        global.heading = geoPosition.heading;
        global.isHeadingAvailable = geoPosition.isHeadingAvailable;
        global.horizontalAccuracy = geoPosition.horizontalAccuracy;
        global.verticalAccuracy = geoPosition.verticalAccuracy;
    },
    function(error) {
        print(error);
    }
);

// Setup MapTextureProvider
var location = LocationAsset
    .getGeoAnchoredPosition(global.lng, global.lat)
    .location.adjacentTile(0,0,-3);
var provider = script.mapModule.createMapTextureProvider();
provider.control.location = location;
script.mesh.mainPass.baseTex = provider;

//Get the postion of the marker
var xy = script.mapModule.longLatToImageRatio(global.lng, global.lat, global.mapProvider.control.location); 
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var locationService;

script.createEvent("OnStartEvent").bind(function () {
    // Create Location Service
    locationService = GeoLocation.createLocationService();
    locationService.accuracy = GeoLocationAccuracy.High;    
    
    var onOrientationUpdate = function (northAlignedOrientation) {
        var heading = GeoLocation.getNorthAlignedHeading(northAlignedOrientation);
        var rotation = heading * Math.PI / 180;
        script.screenTransform.rotation = (quat.fromEulerAngles(0, 0, rotation));
    };    
    
    locationService.onNorthAlignedOrientationUpdate.add(onOrientationUpdate);
});
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// @input SceneObject camera
// @input SceneObject object
// @input Component.DeviceTracking deviceTracking

var locationService;

script.createEvent("OnStartEvent").bind(function () {
    // Create Location Service
    locationService = GeoLocation.createLocationService();
    locationService.accuracy = GeoLocationAccuracy.High;    
    
    var onOrientationUpdate = function (northAlignedOrientation) {
        var heading = GeoLocation.getNorthAlignedHeading(northAlignedOrientation)
        
        //Calculate difference between device rotation & heading
        var deviceRot= script.deviceTracking.getTransform().getLocalRotation();
        deviceRot = deviceRot.invert();
        
        // atan2(2qyqw-2qxqz , 1 - 2qy2 - 2qz2)
        var deviceYaw = Math.atan2(2 * deviceRot.y * deviceRot.w - 2 * deviceRot.x * deviceRot.z, 1 - 2 * deviceRot.y * deviceRot.y - 2 * deviceRot.z * deviceRot.z);
        var deviceYawInDegrees = deviceYaw * 180 / Math.PI;
        var headingOffset = (heading - deviceYawInDegrees) * Math.PI / 180;
   
        var gpsWorldRotation = quat.angleAxis(headingOffset, vec3.up());        
          
        script.object.getTransform().setWorldPosition(script.camera.getTransform().getWorldPosition());
        script.object.getTransform().setLocalRotation(gpsWorldRotation);
        
    };    
   
    locationService.onNorthAlignedOrientationUpdate.add(onOrientationUpdate);
});
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//@input SceneObject compass

var locationService;

script.createEvent("OnStartEvent").bind(function () {
    // Create Location Service
    locationService = GeoLocation.createLocationService();
    locationService.accuracy = GeoLocationAccuracy.High;    
    
    var onOrientationUpdate = function (northAlignedOrientation) {
        script.compass.getTransform().setWorldRotation(northAlignedOrientation);
    };    
    
    locationService.onNorthAlignedOrientationUpdate.add(onOrientationUpdate);
});
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