From f9d105d67da991bb23dcb76054ec1d0083d1f64c Mon Sep 17 00:00:00 2001
From: ousttrue <ousttrue@gmail.com>
Date: Fri, 8 Mar 2024 18:09:11 +0900
Subject: [PATCH] impl bake for vrm-1.0.

fixed #2119
---
 Assets/VRM10/Editor/VRM10ExportSettings.cs | 14 ++++++--
 Assets/VRM10/Editor/Vrm10ExportDialog.cs   | 42 ++++++++++++++++++++++
 2 files changed, 53 insertions(+), 3 deletions(-)

diff --git a/Assets/VRM10/Editor/VRM10ExportSettings.cs b/Assets/VRM10/Editor/VRM10ExportSettings.cs
index 9b328e5a2..f191598d5 100644
--- a/Assets/VRM10/Editor/VRM10ExportSettings.cs
+++ b/Assets/VRM10/Editor/VRM10ExportSettings.cs
@@ -10,23 +10,31 @@ namespace UniVRM10
         /// <summary>
         /// エクスポート時にBlendShapeClipから参照されないBlendShapeを削除する
         /// </summary>
-        [Tooltip("not implemented yet. Remove blendshape that is not used from BlendShapeClip")][ReadOnly]
+        [Tooltip("not implemented yet. Remove blendshape that is not used from BlendShapeClip")]
+        [ReadOnly]
         public bool ReduceBlendshape = false;
 
         /// <summary>
         /// skip if BlendShapeClip.Preset == Unknown
         /// </summary>
-        [Tooltip("not implemented yet. Remove blendShapeClip that preset is Unknown")][ReadOnly]
+        [Tooltip("not implemented yet. Remove blendShapeClip that preset is Unknown")]
+        [ReadOnly]
         public bool ReduceBlendshapeClip = false;
 
         [Tooltip("Use sparse accessor for morph target")]
         public bool MorphTargetUseSparse = true;
 
+        /// <summary>
+        /// FreezeBlendShape
+        /// </summary>
+        [Tooltip("freeze rotation and scale and blendshape")]
+        public bool FreezeMesh = false;
+
         public GltfExportSettings MeshExportSettings => new GltfExportSettings
         {
             UseSparseAccessorForMorphTarget = MorphTargetUseSparse,
             ExportOnlyBlendShapePosition = true,
-            DivideVertexBuffer = true,            
+            DivideVertexBuffer = true,
         };
 
         public GameObject Root { get; set; }
diff --git a/Assets/VRM10/Editor/Vrm10ExportDialog.cs b/Assets/VRM10/Editor/Vrm10ExportDialog.cs
index 51b2e4d3f..729e8d848 100644
--- a/Assets/VRM10/Editor/Vrm10ExportDialog.cs
+++ b/Assets/VRM10/Editor/Vrm10ExportDialog.cs
@@ -258,6 +258,24 @@ namespace UniVRM10
 
         string m_logLabel;
 
+        class TmpDisposer : IDisposable
+        {
+            List<UnityEngine.Object> _disposables = new();
+            public void Push(UnityEngine.Object o)
+            {
+                _disposables.Add(o);
+            }
+
+            public void Dispose()
+            {
+                foreach (var o in _disposables)
+                {
+                    GameObject.DestroyImmediate(o);
+                }
+                _disposables.Clear();
+            }
+        }
+
         protected override void ExportPath(string path)
         {
             m_logLabel = "";
@@ -268,11 +286,35 @@ namespace UniVRM10
 
             try
             {
+                using (var disposer = new TmpDisposer())
                 using (var arrayManager = new NativeArrayManager())
                 {
+                    if (m_settings.FreezeMesh)
+                    {
+                        Debug.Log("vrm-1.0 FreezeMesh");
+                        var copy = GameObject.Instantiate(root);
+                        disposer.Push(copy);
+                        root = copy;
+
+                        // Transform の回転とスケールを Mesh に適用します。
+                        // - BlendShape は現状がbakeされます
+                        // - 回転とスケールが反映された新しい Mesh が作成されます
+                        // - Transform の回転とスケールはクリアされます。world position を維持します
+                        var newMeshMap = BoneNormalizer.NormalizeHierarchyFreezeMesh(root);
+
+                        // SkinnedMeshRenderer.sharedMesh と MeshFilter.sharedMesh を新しいMeshで置き換える
+                        BoneNormalizer.Replace(root, newMeshMap, true, true);
+                    }
+
                     var converter = new UniVRM10.ModelExporter();
                     var model = converter.Export(arrayManager, root);
 
+                    // /// <summary>
+                    // /// freezeblendshape
+                    // /// </summary>
+                    // [tooltip("freeze rotation and scale and blendshape")]
+                    // public bool FreezeMesh = false;
+
                     // 右手系に変換
                     m_logLabel += $"convert to right handed coordinate...\n";
                     model.ConvertCoordinate(VrmLib.Coordinates.Vrm1, ignoreVrm: false);