README.md

VRM取り込みで揺れものにDynamicBoneを使う

DynamicBoneLoadUtility.cs

using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UniGLTF;

namespace VRM.DynamicBoneExtension
{
    public class DynamicBoneLoadUtility {
        public static void LoadSecondary(Transform root, List<Transform> nodes,
            glTF_VRM_SecondaryAnimation secondaryAnimation)
        {
            // clear components
            var remove = root.Traverse()
                .SelectMany(x => x.GetComponents<Component>())
                .Where(x => x is VRMSpringBone || x is VRMSpringBoneColliderGroup 
                                               || x is DynamicBone || x is DynamicBoneCollider || x is DynamicBonePlaneCollider)
                .ToArray();
            foreach (var x in remove)
            {
                if (Application.isPlaying)
                {
                    GameObject.Destroy(x);
                }
                else
                {
                    GameObject.DestroyImmediate(x);
                }
            }

            //var secondaryAnimation = context.VRM.extensions.VRM.secondaryAnimation;
            var colliders = new List<DynamicBoneCollider>();
            foreach (var colliderGroup in secondaryAnimation.colliderGroups)
            {
                foreach (var collider in colliderGroup.colliders)
                {
                    var dbCollider = nodes[colliderGroup.node].gameObject.AddComponent<DynamicBoneCollider>();
                    dbCollider.m_Radius = collider.radius;
                    dbCollider.m_Center = collider.offset;
                    colliders.Add(dbCollider);
                }
            }

            if (secondaryAnimation.boneGroups.Count > 0)
            {
                foreach (var boneGroup in secondaryAnimation.boneGroups)
                {
                    foreach (var boneindex in boneGroup.bones)
                    {
                        var db = nodes[boneindex].gameObject.AddComponent<DynamicBone>();
                        if (boneGroup.center != -1)
                        {
                            db.m_Root = nodes[boneGroup.center];
                        }
                        else
                        {
                            db.m_Root = db.gameObject.transform;
                        }
                        db.m_Damping = boneGroup.dragForce;
                        db.m_Stiffness = boneGroup.stiffiness * 0.25f;
                        db.m_Gravity = boneGroup.gravityDir * boneGroup.gravityPower;
                        db.m_Radius = boneGroup.hitRadius;
                        db.m_Colliders = new List<DynamicBoneColliderBase>();
                        if (boneGroup.colliderGroups != null && boneGroup.colliderGroups.Any())
                        {
                            foreach (var colliderIndex in boneGroup.colliderGroups)
                            {
                                db.m_Colliders.Add(colliders[colliderIndex]);
                            }
                        }
                    }
                }
            }
        }
    }
}

ModelLoader.cs

    public class ModelLoaderUniRx : MonoBehaviour
    {
        void LoadVRM(byte[] bytes)
        {
            // GLB形式のperse
            var context = new VRMDbImporterContext();
            context.ParseGlb(bytes);

        }
    }

VRMDbImporterContext.cs

using System;
using System.Collections.Generic;
using System.Linq;
using UniGLTF;
using UnityEngine;
using VRM;

namespace VRM.DynamicBoneExtension
{
public class VRMDbImporterContext : VRMImporterContext {
    
    #region OnLoad
    protected override void OnLoadModel()
    {
        Root.name = "VRM";

        using (MeasureTime("VRM LoadMeta"))
        {
            LoadMeta();
        }

        using (MeasureTime("VRM LoadHumanoid"))
        {
            LoadHumanoid();
        }

        using (MeasureTime("VRM LoadBlendShapeMaster"))
        {
            LoadBlendShapeMaster();
        }
        using (MeasureTime("VRM LoadSecondary"))
        {
            DynamicBoneLoadUtility.LoadSecondary(Root.transform, Nodes,
                GLTF.extensions.VRM.secondaryAnimation);
        }
        using (MeasureTime("VRM LoadFirstPerson"))
        {
            LoadFirstPerson();
        }
    }

        void LoadMeta()
        {
            var meta = ReadMeta();
            if (meta.Thumbnail == null)
            {
                /*
                // 作る
                var lookAt = Root.GetComponent<VRMLookAtHead>();
                var thumbnail = lookAt.CreateThumbnail();
                thumbnail.name = "thumbnail";
                meta.Thumbnail = thumbnail;
                Textures.Add(new TextureItem(thumbnail));
                */
            }
            var _meta = Root.AddComponent<VRMMeta>();
            _meta.Meta = meta;
            Meta = meta;
        }

        void LoadFirstPerson()
        {
            var firstPerson = Root.AddComponent<VRMFirstPerson>();

            var gltfFirstPerson = GLTF.extensions.VRM.firstPerson;
            if (gltfFirstPerson.firstPersonBone != -1)
            {
                firstPerson.FirstPersonBone = Nodes[gltfFirstPerson.firstPersonBone];
                firstPerson.FirstPersonOffset = gltfFirstPerson.firstPersonBoneOffset;
            }
            else
            {
                // fallback
                firstPerson.SetDefault();
            }
            firstPerson.TraverseRenderers(this);

            // LookAt
            var lookAtHead = Root.AddComponent<VRMLookAtHead>();
            lookAtHead.OnImported(this);
        }

        void LoadBlendShapeMaster()
        {
            BlendShapeAvatar = ScriptableObject.CreateInstance<BlendShapeAvatar>();
            BlendShapeAvatar.name = "BlendShape";

            var transformMeshTable = new Dictionary<Mesh, Transform>();
            foreach (var transform in Root.transform.Traverse())
            {
                if (transform.GetSharedMesh() != null)
                {
                    transformMeshTable.Add(transform.GetSharedMesh(), transform);
                }
            }

            var blendShapeList = GLTF.extensions.VRM.blendShapeMaster.blendShapeGroups;
            if (blendShapeList != null && blendShapeList.Count > 0)
            {
                foreach (var x in blendShapeList)
                {
                    BlendShapeAvatar.Clips.Add(LoadBlendShapeBind(x, transformMeshTable));
                }
            }

            var proxy = Root.AddComponent<VRMBlendShapeProxy>();
            BlendShapeAvatar.CreateDefaultPreset();
            proxy.BlendShapeAvatar = BlendShapeAvatar;
        }

        BlendShapeClip LoadBlendShapeBind(glTF_VRM_BlendShapeGroup group, Dictionary<Mesh, Transform> transformMeshTable)
        {
            var asset = ScriptableObject.CreateInstance<BlendShapeClip>();
            var groupName = group.name;
            var prefix = "BlendShape.";
            while (groupName.StartsWith(prefix))
            {
                groupName = groupName.Substring(prefix.Length);
            }
            asset.name = "BlendShape." + groupName;

            if (group != null)
            {
                asset.BlendShapeName = groupName;
                asset.Preset = EnumUtil.TryParseOrDefault<BlendShapePreset>(group.presetName);
                asset.IsBinary = group.isBinary;
                if (asset.Preset == BlendShapePreset.Unknown)
                {
                    // fallback
                    asset.Preset = EnumUtil.TryParseOrDefault<BlendShapePreset>(group.name);
                }
                asset.Values = group.binds.Select(x =>
                {
                    var mesh = Meshes[x.mesh].Mesh;
                    var node = transformMeshTable[mesh];
                    var relativePath = UniGLTF.UnityExtensions.RelativePathFrom(node, Root.transform);
                    return new BlendShapeBinding
                    {
                        RelativePath = relativePath,
                        Index = x.index,
                        Weight = x.weight,
                    };
                })
                .ToArray();
                asset.MaterialValues = group.materialValues.Select(x =>
                {
                    var value = new Vector4();
                    for (int i = 0; i < x.targetValue.Length; ++i)
                    {
                        switch (i)
                        {
                            case 0: value.x = x.targetValue[0]; break;
                            case 1: value.y = x.targetValue[1]; break;
                            case 2: value.z = x.targetValue[2]; break;
                            case 3: value.w = x.targetValue[3]; break;
                        }
                    }

                    var material = GetMaterials().FirstOrDefault(y => y.name == x.materialName);
                    var propertyName = x.propertyName;
                    if (x.propertyName.EndsWith("_ST_S")
                    || x.propertyName.EndsWith("_ST_T"))
                    {
                        propertyName = x.propertyName.Substring(0, x.propertyName.Length - 2);
                    }

                    var binding = default(MaterialValueBinding?);

                    if (material != null)
                    {
                        try
                        {
                            binding = new MaterialValueBinding
                            {
                                MaterialName = x.materialName,
                                ValueName = x.propertyName,
                                TargetValue = value,
                                BaseValue = material.GetColor(propertyName),
                            };
                        }
                        catch (Exception)
                        {
                            // do nothing
                        }
                    }

                    return binding;
                })
                .Where(x => x.HasValue)
                .Select(x => x.Value)
                .ToArray();
            }

            return asset;
        }

        static String ToHumanBoneName(HumanBodyBones b)
        {
            foreach (var x in HumanTrait.BoneName)
            {
                if (x.Replace(" ", "") == b.ToString())
                {
                    return x;
                }
            }

            throw new KeyNotFoundException();
        }

        static SkeletonBone ToSkeletonBone(Transform t)
        {
            var sb = new SkeletonBone();
            sb.name = t.name;
            sb.position = t.localPosition;
            sb.rotation = t.localRotation;
            sb.scale = t.localScale;
            return sb;
        }

        private void LoadHumanoid()
        {
            AvatarDescription = GLTF.extensions.VRM.humanoid.ToDescription(Nodes);
            AvatarDescription.name = "AvatarDescription";
            HumanoidAvatar = AvatarDescription.CreateAvatar(Root.transform);
            if (!HumanoidAvatar.isValid || !HumanoidAvatar.isHuman)
            {
                throw new Exception("fail to create avatar");
            }

            HumanoidAvatar.name = "VrmAvatar";

            var humanoid = Root.AddComponent<VRMHumanoidDescription>();
            humanoid.Avatar = HumanoidAvatar;
            humanoid.Description = AvatarDescription;

            var animator = Root.GetComponent<Animator>();
            if (animator == null)
            {
                animator = Root.AddComponent<Animator>();
            }
            animator.avatar = HumanoidAvatar;
        }
        #endregion
    }
}