25 lines
619 B
TypeScript
25 lines
619 B
TypeScript
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import { Injectable } from '@angular/core';
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import { Observer, Observable } from 'rxjs';
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@Injectable()
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export class DeviceOrientationService {
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/**
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* Tries HTML5 geolocation.
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*
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* Wraps the Geolocation API into an observable.
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*
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* @return An observable of Bearing
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*/
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getCurrentBearing(): Observable<number> {
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return Observable.create((observer: Observer<number>) => {
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let sensor = new Magnetometer();
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sensor.onreading= (ev:Event) => {
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observer.next(Math.atan2(sensor.y, sensor.x) * (180 / Math.PI));
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};
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});
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}
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}
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