fix: make camera report position from start

kernel/packages/decentraland-ecs/src/index.ts

@@ -17,8 +17,8 @@ import { DecentralandSynchronizationSystem } from './decentraland/Implementation
 import { Engine } from './ecs/Engine'
 import { Entity } from './ecs/Entity'
 
-const entity = new Entity('scene');
-(entity as any).uuid = '0'
+const entity = new Entity('scene')
+;(entity as any).uuid = '0'
 
 // Initialize engine
 /** @public */
@@ -37,6 +37,12 @@ if (typeof dcl !== 'undefined') {
   engine.addSystem(new DecentralandSynchronizationSystem(dcl), Infinity)
 }
 
+// We instantiate the camera, so that it starts listening to events
+import { Camera } from './decentraland/Camera'
+if (typeof dcl !== 'undefined') {
+  dcl.onStart(() => Camera.instance)
+}
+
 import { uuidEventSystem, pointerEventSystem, raycastEventSystem } from './decentraland/Systems'
 
 // Initialize UUID Events system

kernel/packages/shared/world/SceneSystemWorker.ts

@@ -21,7 +21,7 @@ export const hudWorkerUrl = URL.createObjectURL(hudWorkerBLOB)
 export class SceneSystemWorker extends SceneWorker {
   private sceneStarted: boolean = false
 
-  private position!: Vector3
+  private position: Vector3 | undefined
   private readonly lastSentPosition = new Vector3(0, 0, 0)
   private readonly lastSentRotation = new Quaternion(0, 0, 0, 1)
   private positionObserver: Observer<any> | null = null
@@ -82,7 +82,7 @@ export class SceneSystemWorker extends SceneWorker {
 
   private sendUserViewMatrix(positionReport: Readonly<PositionReport>) {
     if (this.engineAPI && 'positionChanged' in this.engineAPI.subscribedEvents) {
-      if (!this.lastSentPosition.equals(positionReport.position)) {
+      if (this.position && !this.lastSentPosition.equals(positionReport.position)) {
         this.engineAPI.sendSubscriptionEvent('positionChanged', {
           position: {
             x: positionReport.position.x - this.position.x,