reset beatOffsetTime on clearBeats

src/components/beat-loader.js

@@ -139,7 +139,8 @@ AFRAME.registerComponent('beat-loader', {
     // Re-sync song with beats playback.
     const songComponent = this.el.components.song;
     const currentTime = songComponent.getCurrentTime();
-    if (songComponent.songStartTime && this.beatsTimeOffset !== undefined &&
+
+    if (currentTime !== undefined && this.beatsTimeOffset !== undefined &&
         this.songCurrentTime !== currentTime) {
       this.songCurrentTime = currentTime;
       this.beatsTime = (this.songCurrentTime + this.data.beatAnticipationTime) * 1000;
@@ -175,6 +176,7 @@ AFRAME.registerComponent('beat-loader', {
       }
     }
 
+    // Update preload beat offset.
     if (this.beatsTimeOffset !== undefined) {
       if (this.beatsTimeOffset <= 0) {
         this.el.sceneEl.emit('beatloaderpreloadfinish', null, false);
@@ -185,7 +187,7 @@ AFRAME.registerComponent('beat-loader', {
       }
     }
 
-    this.beatsTime = beatsTime + delta;
+    this.beatsTime += delta;
   },
 
   generateBeat: (function () {
@@ -302,7 +304,7 @@ AFRAME.registerComponent('beat-loader', {
    */
   clearBeats: function () {
     this.beatsTime = 0;
-    this.beatsTimeOffset = undefined;
+    this.beatsTimeOffset = this.data.beatAnticipationTime * 1000;
     for (let i = 0; i < this.beatContainer.children.length; i++) {
       let child = this.beatContainer.children[i];
       if (child.components.beat) {

src/components/song.js

@@ -132,6 +132,7 @@ AFRAME.registerComponent('song', {
     this.source.stop();
     this.source.disconnect();
     this.source = null;
+    this.songStartTime = undefined;
   },
 
   victory: function () {
@@ -178,6 +179,7 @@ AFRAME.registerComponent('song', {
       if (this.data.isBeatsPreloaded) { this.startAudio(); }
     }, ONCE);
     this.audioAnalyser.refreshSource();
+    this.songStartTime = undefined;
   },
 
   onWallHitStart: function () {
@@ -200,6 +202,7 @@ AFRAME.registerComponent('song', {
   },
 
   getCurrentTime: function () {
+    if (this.songStartTime === undefined) { return undefined; }
     return this.context.currentTime - this.songStartTime;
   }
 });