From eaaa780c304a643910bcbe05ad83d53501fa537b Mon Sep 17 00:00:00 2001
From: kovacsv <viktorkovacs@gmail.com>
Date: Thu, 11 Nov 2021 15:47:52 +0100
Subject: [PATCH] Minor speed improvement.

---
 website/o3dv/js/navigatoritems.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/website/o3dv/js/navigatoritems.js b/website/o3dv/js/navigatoritems.js
index 5df9041..5e5f8fe 100644
--- a/website/o3dv/js/navigatoritems.js
+++ b/website/o3dv/js/navigatoritems.js
@@ -55,6 +55,9 @@ OV.MeshItem = class extends OV.TreeViewButtonItem
 
     SetVisible (visible, recurse)
     {
+        if (this.visible === visible) {
+            return;
+        }
         this.visible = visible;
         if (this.visible) {
             this.showHideButton.SetImage ('visible');
@@ -114,6 +117,9 @@ OV.NodeItem = class extends OV.TreeViewGroupButtonItem
 
     SetVisible (visible, recurse)
     {
+        if (this.visible === visible) {
+            return;
+        }
         this.visible = visible;
         if (this.visible) {
             this.showHideButton.SetImage ('visible');