From d1a10f03204904a65dfd41a48426f42005d11c8e Mon Sep 17 00:00:00 2001
From: pchen66 <ray.chen.705007@gmail.com>
Date: Fri, 24 Apr 2020 23:42:57 -0700
Subject: [PATCH] Remove infospots when dispose

---
 src/viewer/Viewer.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/viewer/Viewer.js b/src/viewer/Viewer.js
index d36fe08f..f2a721b8 100644
--- a/src/viewer/Viewer.js
+++ b/src/viewer/Viewer.js
@@ -2044,12 +2044,26 @@ Viewer.prototype = Object.assign( Object.create( THREE.EventDispatcher.prototype
      */
     onPanoramaDispose: function ( panorama ) {
 
+        const { scene } = this;
+        const infospotDisposeMapper = infospot => infospot.toPanorama !== panorama ? infospot : infospot.dispose();
+
         if ( panorama instanceof VideoPanorama ) {
 
             this.hideVideoWidget();
 
         }
 
+        // traverse the scene to find association
+        scene.traverse( object => {
+
+            if ( object instanceof Panorama ) {
+
+                object.linkedSpots = object.linkedSpots.map( infospotDisposeMapper ).filter( infospot => !!infospot );
+
+            }
+
+        } );
+
         if ( panorama === this.panorama ) {
 
             this.panorama = null;