From 516054325d4f89c971043d934aa51ef9853bdd16 Mon Sep 17 00:00:00 2001
From: ZiyunShang <33445445+ZiyunShang@users.noreply.github.com>
Date: Mon, 12 Apr 2021 14:39:14 +0800
Subject: [PATCH] Change DefaultWatch3DViewModel property - Active to virtual
 (#11597)

* Change DefaultWatch3DViewModel property - Active to virtual

* Add comment to ShowEdge changes.
---
 src/DynamoCoreWpf/ViewModels/Core/DynamoViewModel.cs         | 5 ++++-
 .../ViewModels/Watch3D/DefaultWatch3DViewModel.cs            | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/DynamoCoreWpf/ViewModels/Core/DynamoViewModel.cs b/src/DynamoCoreWpf/ViewModels/Core/DynamoViewModel.cs
index 83f68be3e3d..0e4131695ae 100644
--- a/src/DynamoCoreWpf/ViewModels/Core/DynamoViewModel.cs
+++ b/src/DynamoCoreWpf/ViewModels/Core/DynamoViewModel.cs
@@ -699,7 +699,10 @@ private void RenderPackageFactoryViewModel_PropertyChanged(object sender, Proper
                     // A full regeneration is required to get the edge geometry.
                     foreach (var vm in Watch3DViewModels)
                     {
-                        vm.RegenerateAllPackages();
+                        if (vm is HelixWatch3DViewModel) // just need a full regeneration when vm is HelixWatch3DViewModel
+                        {
+                            vm.RegenerateAllPackages();
+                        }
                     }
                     break;
                 case "MaxTessellationDivisions":
diff --git a/src/DynamoCoreWpf/ViewModels/Watch3D/DefaultWatch3DViewModel.cs b/src/DynamoCoreWpf/ViewModels/Watch3D/DefaultWatch3DViewModel.cs
index b6e9c40664b..bc185d13bff 100644
--- a/src/DynamoCoreWpf/ViewModels/Watch3D/DefaultWatch3DViewModel.cs
+++ b/src/DynamoCoreWpf/ViewModels/Watch3D/DefaultWatch3DViewModel.cs
@@ -78,7 +78,7 @@ public class DefaultWatch3DViewModel : NotificationObject, IWatch3DViewModel, ID
         /// geometry updates. When set to False, the Watch3DView corresponding
         /// to this view model is not displayed.
         /// </summary>
-        public bool Active
+        public virtual bool Active
         {
             get { return active; }
             set