From 90be6dc76346076d2a890364caa33124888a54b3 Mon Sep 17 00:00:00 2001
From: ousttrue <ousttrue@gmail.com>
Date: Wed, 27 Feb 2019 17:28:14 +0900
Subject: [PATCH] glTF.extensions.VRM default value to null

fix for none VRM exporter
---
 Assets/VRM/UniVRM/Scripts/Format/VRMExporter.cs | 2 ++
 Assets/VRM/UniVRM/Scripts/Format/VRMFormat.cs   | 7 +++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/Assets/VRM/UniVRM/Scripts/Format/VRMExporter.cs b/Assets/VRM/UniVRM/Scripts/Format/VRMExporter.cs
index 85f763e22..5d690a094 100644
--- a/Assets/VRM/UniVRM/Scripts/Format/VRMExporter.cs
+++ b/Assets/VRM/UniVRM/Scripts/Format/VRMExporter.cs
@@ -16,11 +16,13 @@ namespace VRM
         public VRMExporter(glTF gltf) : base(gltf)
         {
             gltf.extensionsUsed.Add(glTF_VRM_extensions.ExtensionName);
+            gltf.extensions.VRM = new glTF_VRM_extensions();
         }
 
         public new static glTF Export(GameObject go)
         {
             var gltf = new glTF();
+
             using (var exporter = new VRMExporter(gltf)
             {
 #if VRM_EXPORTER_USE_SPARSE
diff --git a/Assets/VRM/UniVRM/Scripts/Format/VRMFormat.cs b/Assets/VRM/UniVRM/Scripts/Format/VRMFormat.cs
index 501328e15..9c0d7a7ec 100644
--- a/Assets/VRM/UniVRM/Scripts/Format/VRMFormat.cs
+++ b/Assets/VRM/UniVRM/Scripts/Format/VRMFormat.cs
@@ -7,12 +7,15 @@ namespace UniGLTF
 {
     public partial class glTF_extensions : ExtensionsBase<glTF_extensions>
     {
-        public VRM.glTF_VRM_extensions VRM = new VRM.glTF_VRM_extensions();
+        public VRM.glTF_VRM_extensions VRM;
 
         [JsonSerializeMembers]
         void VRMSerializeMembers(GLTFJsonFormatter f)
         {
-            f.Key("VRM"); f.GLTFValue(VRM);
+            if (VRM != null)
+            {
+                f.Key("VRM"); f.GLTFValue(VRM);
+            }
         }
     }
 }