Implement copassheading

projects/common-map/src/fm-map/common-map.module.ts

@@ -60,6 +60,7 @@ import { LegendComponent } from './components/legend/legend.component';
 import { LayerVectorImageComponent } from './components/aol/layer-vector-image/layer-vector-image.component';
 import { StateSerializerService } from './services/state-serializer.service';
 import { GeolocationService } from './services/geolocation.service';
+import {DeviceOrientationService} from './services/device-orientation.service';
 import { localStorageSync } from 'ngrx-store-localstorage';
 import { WidgetStatusComponent } from './components/widget-status/widget-status.component';
 import { ForChild} from './components/for-item/for-child.decorator';
@@ -114,6 +115,7 @@ export {
   AbstractItemListComponent,
   StateSerializerService,
   GeolocationService,
+  DeviceOrientationService,
   IMapState,
   ISelectedFeatures,
   IItemLayer,
@@ -232,6 +234,7 @@ export class AppCommonMapModule {
       providers: [
         StateSerializerService,
         GeolocationService,
+        DeviceOrientationService,
         { provide: AbstractFeatureListComponent, useClass: FeatureListCroppingschemeComponent, multi: true },
         { provide: AbstractFeatureListComponent, useClass: FeatureListCropfieldComponent, multi: true },
         { provide: AbstractFeatureListFeatureComponent, useClass: FeatureListFeatureComponent, multi: true },

projects/common-map/src/fm-map/components/aol/gps-location/gps-location.component.ts

@@ -62,7 +62,9 @@ export class GpsLocation  implements OnInit,OnChanges{
       this.instance.setPosition(fromLonLat([p.coords.longitude, p.coords.latitude]));
       this.locationTolerance = p.coords.accuracy;
       this.recalcLocationTolerance();
-      this.heading = p.coords.heading;
+    }
+    if(changes.heading && this.instance) {
+      this.rotate = "rotate(" + Math.round(changes.heading.currentValue) + " 500 500)";
     }
   }
 }

projects/common-map/src/fm-map/components/map/map.component.html

@@ -16,7 +16,8 @@
   menuVisible:menuVisible$|async,
   searchCollapsed:searchCollapsed$|async,
   clearEnabled:clearEnabled$|async,
-  period:period$|async
+  period:period$|async,
+  compassHeading:compassHeading$|async
 } as state">
   <aol-map #map (moveEnd)="handleOnMoveEnd($event)" (click)="handleOnMouseDown($event)" [ngClass]="{'panel-visible':state.panelVisible}" class="map">  
     <div>
@@ -34,7 +35,7 @@
     <aol-layer-vector>
       <fm-map-item-source-vector [features]="state.features" (onFeaturesSelected)="handleFeaturesSelected($event)" [selectedFeature]="state.selectedFeature" [selectedItem]="state.selectedItem"></fm-map-item-source-vector>
     </aol-layer-vector>
-    <fm-map-gps-location [position]="state.position" [headingTolerance]="20" [showHeading]="true"></fm-map-gps-location>
+    <fm-map-gps-location [position]="state.position" [headingTolerance]="20" [showHeading]="true" [heading]="state.compassHeading"></fm-map-gps-location>
     <div class="control-container">
   <!--    <switch2d3d></switch2d3d>-->
       <fm-map-pan-to-location [position]="state.position" [mapState]="state.mapState" [animate]="true"></fm-map-pan-to-location>

projects/common-map/src/fm-map/components/map/map.component.ts

@@ -18,6 +18,7 @@ import { IDroppedFile } from '../aol/file-drop-target/file-drop-target.component
 import { IMetaData } from '../meta-data-modal/meta-data-modal.component';
 import { StateSerializerService } from '../../services/state-serializer.service';
 import { GeolocationService} from '../../services/geolocation.service';
+import {DeviceOrientationService} from '../../services/device-orientation.service';
 
 // AppCommon
 import { ResumableFileUploadService, ItemTypeService } from '@farmmaps/common';
@@ -69,6 +70,7 @@ export class MapComponent implements OnInit, OnDestroy,AfterViewInit {
   public menuVisible$: Observable<boolean>;
   public query$: Observable<IQueryState>;
   public position$: Observable<Position>;
+  public compassHeading$: Observable<number>;
   public baseLayersCollapsed:boolean = true;
   public overlayLayersCollapsed: boolean = true;
   public extent$: Observable<Extent>;
@@ -82,7 +84,8 @@ export class MapComponent implements OnInit, OnDestroy,AfterViewInit {
     public itemTypeService: ItemTypeService, 
     private location: Location, 
     private geolocationService: GeolocationService,
-    private zone: NgZone) {
+    private zone: NgZone,
+    private deviceorientationService:DeviceOrientationService) {
   }
 
   @HostListener('document:keyup', ['$event'])
@@ -143,6 +146,7 @@ export class MapComponent implements OnInit, OnDestroy,AfterViewInit {
     this.selectedItemLayer$ = this.store.select(mapReducers.selectGetSelectedItemLayer);
     this.period$ = this.store.select(mapReducers.selectGetPeriod);
     this.position$ = this.geolocationService.getCurrentPosition();
+    this.compassHeading$ = this.deviceorientationService.getCurrentCompassHeading();
 
     this.mapState$.pipe(withLatestFrom(this.queryState$)).subscribe((state) => {
       this.replaceUrl(state[0], state[1], true);

projects/common-map/src/fm-map/services/device-orientation.service.ts

@@ -5,19 +5,43 @@ import { Observer, Observable } from 'rxjs';
 @Injectable()
 export class DeviceOrientationService {
 
-   /**
-   * Tries HTML5 geolocation.
-   *
-   * Wraps the Geolocation API into an observable.
-   *
-   * @return An observable of Bearing
-   */
-  getCurrentBearing(): Observable<number> {
+  compassHeading(alpha, beta, gamma):number {
+
+    // 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;
+    }
+    return compassHeading * (180/Math.PI);
+  }
+
+  getCurrentCompassHeading(): Observable<number> {
     return Observable.create((observer: Observer<number>) => {  
-        let sensor = new Magnetometer();
-        sensor.onreading= (ev:Event) => {
-             observer.next(Math.atan2(sensor.y, sensor.x) * (180 / Math.PI));
-        };
+        window.addEventListener("deviceorientation", (event:DeviceOrientationEvent)=>{
+          observer.next(this.compassHeading(event.alpha,event.beta,event.gamma));
+        } );
     });
   }