bake 時に SpringBone と LookAt に反映する実装

Assets/VRM/Editor/Format/VRMEditorExporter.cs

@@ -208,8 +208,11 @@ private static byte[] Export(
 
             if (settings.PoseFreeze)
             {
-                // 正規化
-                VRMBoneNormalizer.Execute(target, settings.ForceTPose);
+                using (var backup = new VrmGeometryBackup(target))
+                {
+                    // 正規化
+                    VRMBoneNormalizer.Execute(target, settings.ForceTPose);
+                }
             }
 
             // 元のBlendShapeClipに変更を加えないように複製

Assets/VRM/Runtime/IO/VrmGeometryBackup.cs

@@ -0,0 +1,92 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UniGLTF;
+
+namespace VRM
+{
+    /// <summary>
+    /// SpringBone, LookAt の座標を記録しておき、Dispose で復帰する。
+    /// </summary>
+    public class VrmGeometryBackup : IDisposable
+    {
+        struct VrmSpringBoneColliderBackup
+        {
+            struct Collider
+            {
+                Vector3 _offsetInWorld;
+                float _radiusMultLossyScale;
+
+                public Collider(Transform transform, VRMSpringBoneColliderGroup.SphereCollider collider)
+                {
+                    _offsetInWorld = transform.TransformPoint(collider.Offset);
+                    _radiusMultLossyScale = transform.UniformedLossyScale() * collider.Radius;
+                }
+
+                public void Restore(Transform transform, VRMSpringBoneColliderGroup.SphereCollider collider)
+                {
+                    collider.Offset = transform.worldToLocalMatrix.MultiplyPoint(_offsetInWorld);
+                    collider.Radius = _radiusMultLossyScale / transform.UniformedLossyScale();
+                }
+            }
+            Collider[] _colliers;
+
+            public VrmSpringBoneColliderBackup(VRMSpringBoneColliderGroup colliderGroup)
+            {
+                _colliers = colliderGroup.Colliders.Select(x => new Collider(colliderGroup.transform, x)).ToArray();
+            }
+
+            public void Restore(VRMSpringBoneColliderGroup colliderGroup)
+            {
+                for (int i = 0; i < colliderGroup.Colliders.Length; ++i)
+                {
+                    _colliers[i].Restore(colliderGroup.transform, colliderGroup.Colliders[i]);
+                }
+            }
+        }
+
+        struct VrmSpringBoneBackup
+        {
+            Vector3 _gravityDirInWorld;
+            float _radiusMultLossyScale;
+
+            public VrmSpringBoneBackup(VRMSpringBone springBone)
+            {
+                _gravityDirInWorld = springBone.transform.TransformDirection(springBone.m_gravityDir);
+                _radiusMultLossyScale = springBone.transform.UniformedLossyScale() * springBone.m_hitRadius;
+            }
+            public void Restore(VRMSpringBone springBone)
+            {
+                springBone.m_gravityDir = springBone.transform.worldToLocalMatrix.MultiplyVector(_gravityDirInWorld);
+                springBone.m_hitRadius = _radiusMultLossyScale / springBone.transform.UniformedLossyScale();
+            }
+        }
+
+        Dictionary<VRMSpringBoneColliderGroup, VrmSpringBoneColliderBackup> _springBoneColliders;
+        Dictionary<VRMSpringBone, VrmSpringBoneBackup> _springBones;
+        VRMFirstPerson _firstPerson;
+        Vector3 _firstPersonOffsetInWorld;
+
+        public VrmGeometryBackup(GameObject root)
+        {
+            _springBoneColliders = root.GetComponentsInChildren<VRMSpringBoneColliderGroup>().ToDictionary(x => x, x => new VrmSpringBoneColliderBackup(x));
+            _springBones = root.GetComponentsInChildren<VRMSpringBone>().ToDictionary(x => x, x => new VrmSpringBoneBackup(x));
+            _firstPerson = root.GetComponent<VRMFirstPerson>();
+            _firstPersonOffsetInWorld = _firstPerson.transform.TransformPoint(_firstPerson.FirstPersonOffset);
+        }
+
+        public void Dispose()
+        {
+            foreach (var (k, v) in _springBoneColliders)
+            {
+                v.Restore(k);
+            }
+            foreach (var (k, v) in _springBones)
+            {
+                v.Restore(k);
+            }
+            _firstPerson.FirstPersonOffset = _firstPerson.transform.worldToLocalMatrix.MultiplyPoint(_firstPersonOffsetInWorld);
+        }
+    }
+}

Assets/VRM10/Editor/Vrm10ExportDialog.cs

@@ -293,14 +293,17 @@ protected override void ExportPath(string path)
                         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);
+                        using (var backup = new Vrm10GeometryBackup(root))
+                        {
+                            // 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();

Assets/VRM10/Runtime/IO/Vrm10GeometryBackup.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UniGLTF;
+
+namespace UniVRM10
+{
+    /// <summary>
+    /// SpringBone, LookAt の座標を記録しておき、Dispose で復帰する。
+    /// </summary>
+    public class Vrm10GeometryBackup : IDisposable
+    {
+        struct Vrm10SpringBoneColliderBackup
+        {
+            Vector3 _offsetInWorld;
+            float _radiusMultLossyScale;
+
+            public Vrm10SpringBoneColliderBackup(VRM10SpringBoneCollider collider)
+            {
+                _offsetInWorld = collider.transform.TransformPoint(collider.Offset);
+                _radiusMultLossyScale = collider.transform.UniformedLossyScale() * collider.Radius;
+            }
+
+            public void Restore(VRM10SpringBoneCollider collider)
+            {
+                collider.Offset = collider.transform.worldToLocalMatrix.MultiplyPoint(_offsetInWorld);
+                collider.Radius = _radiusMultLossyScale / collider.transform.UniformedLossyScale();
+            }
+        }
+
+        struct Vrm10SpringBoneJointBackup
+        {
+            Vector3 _gravityDirInWorld;
+            float _radiusMultLossyScale;
+
+            public Vrm10SpringBoneJointBackup(VRM10SpringBoneJoint joint)
+            {
+                _gravityDirInWorld = joint.transform.TransformDirection(joint.m_gravityDir);
+                _radiusMultLossyScale = joint.transform.UniformedLossyScale() * joint.m_jointRadius;
+            }
+            public void Restore(VRM10SpringBoneJoint joint)
+            {
+                joint.m_gravityDir = joint.transform.worldToLocalMatrix.MultiplyVector(_gravityDirInWorld);
+                joint.m_jointRadius = _radiusMultLossyScale / joint.transform.UniformedLossyScale();
+            }
+        }
+
+        Dictionary<VRM10SpringBoneCollider, Vrm10SpringBoneColliderBackup> _springBoneColliders;
+        Dictionary<VRM10SpringBoneJoint, Vrm10SpringBoneJointBackup> _springBoneJoints;
+        Vrm10Instance _vrm;
+        Vector3 _lookAtOffsetInWorld;
+
+        public Vrm10GeometryBackup(GameObject root)
+        {
+            _springBoneColliders = root.GetComponentsInChildren<VRM10SpringBoneCollider>().ToDictionary(x => x, x => new Vrm10SpringBoneColliderBackup(x));
+            _springBoneJoints = root.GetComponentsInChildren<VRM10SpringBoneJoint>().ToDictionary(x => x, x => new Vrm10SpringBoneJointBackup(x));
+            _vrm = root.GetComponent<Vrm10Instance>();
+            _lookAtOffsetInWorld = _vrm.transform.TransformPoint(_vrm.Vrm.LookAt.OffsetFromHead);
+        }
+
+        public void Dispose()
+        {
+            foreach (var (k, v) in _springBoneColliders)
+            {
+                v.Restore(k);
+            }
+            foreach (var (k, v) in _springBoneJoints)
+            {
+                v.Restore(k);
+            }
+            _vrm.Vrm.LookAt.OffsetFromHead = _vrm.transform.worldToLocalMatrix.MultiplyPoint(_lookAtOffsetInWorld);
+        }
+    }
+}