Separating MMDAnimationHelper from MMDLoader.js

examples/js/animation/MMDAnimationHelper.js

@@ -0,0 +1,1018 @@
+/**
+ * @author takahiro / https://github.com/takahirox
+ *
+ * MMDAnimationHelper handles animation of MMD assets loaded by MMDLoader
+ * with MMD special features as IK, Grant, and Physics.
+ *
+ * Dependencies
+ *  - ammo.js https://github.com/kripken/ammo.js
+ *  - THREE.MMDPhysics
+ *  - THREE.CCDIKSolver
+ *
+ * TODO
+ *  - more precise grant skinning support.
+ */
+
+THREE.MMDAnimationHelper = ( function () {
+
+	/**
+	 * @param {Object} params - (optional)
+	 * @param {boolean} params.sync - Whether animation durations of added objects are synched. Default is true.
+	 * @param {Number} params.afterglow - Default is 0.0.
+	 * @param {boolean} params resetPhysicsOnLoop - Default is true.
+	 */
+	function MMDAnimationHelper( params ) {
+
+		params = params || {};
+
+		this.meshes = [];
+
+		this.camera = null;
+		this.cameraTarget = new THREE.Object3D();
+		this.cameraTarget.name = 'target';
+
+		this.audio = null;
+		this.audioManager = null;
+
+		this.objects = new WeakMap();
+
+		this.configuration = {
+			sync: params.sync !== undefined
+				? params.sync : true,
+			afterglow: params.afterglow !== undefined
+				? params.afterglow : 0.0,
+			resetPhysicsOnLoop: params.resetPhysicsOnLoop !== undefined
+				? params.resetPhysicsOnLoop : true
+		};
+
+		this.enabled = {
+			animation: true,
+			ik: true,
+			grant: true,
+			physics: true,
+			cameraAnimation: true
+		};
+
+		// experimental
+		this.sharedPhysics = false;
+		this.masterPhysics = null;
+
+	}
+
+	MMDAnimationHelper.prototype = {
+
+		constructor: MMDAnimationHelper,
+
+		/**
+		 * Adds an Three.js Object to helper and setups animation.
+		 * The anmation durations of added objects are synched
+		 * if this.configuration.sync is true.
+		 *
+		 * @param {THREE.SkinnedMesh|THREE.Camera|THREE.Audio} object
+		 * @param {Object} params - (optional)
+		 * @param {THREE.AnimationClip|Array<THREE.AnimationClip>} params.animation - Only for THREE.SkinnedMesh and THREE.Camera. Default is undefined.
+		 * @param {boolean} params.physics - Only for THREE.SkinnedMesh. Default is true.
+		 * @param {Number} params.delayTime - Only for THREE.Audio. Default is 0.0.
+		 * @return {THREE.MMDAnimationHelper}
+		 */
+		add: function ( object, params ) {
+
+			params = params || {};
+
+			if ( object.isSkinnedMesh ) {
+
+				this._addMesh( object, params );
+
+			} else if ( object.isCamera ) {
+
+				this._setupCamera( object, params );
+
+			} else if ( object.type === 'Audio' ) {
+
+				this._setupAudio( object, params );
+
+			} else {
+
+				throw new Error( 'THREE.MMDAnimationHelper.add: '
+					+ 'accepts only '
+					+ 'THREE.SkinnedMesh or '
+					+ 'THREE.Camera or '
+					+ 'THREE.Audio instance.' );
+
+			}
+
+			if ( this.configuration.sync ) this._syncDuration();
+
+			return this;
+
+		},
+
+		/**
+		 * Removes an Three.js Object from helper.
+		 *
+		 * @param {THREE.SkinnedMesh|THREE.Camera|THREE.Audio} object
+		 * @return {THREE.MMDAnimationHelper}
+		 */
+		remove: function ( object ) {
+
+			if ( object.isSkinnedMesh ) {
+
+				this._removeMesh( object );
+
+			} else if ( object.isCamera ) {
+
+				this._clearCamera( object );
+
+			} else if ( object.type === 'Audio' ) {
+
+				this._clearAudio( object );
+
+			} else {
+
+				throw new Error( 'THREE.MMDAnimationHelper.remove: '
+					+ 'accepts only '
+					+ 'THREE.SkinnedMesh or '
+					+ 'THREE.Camera or '
+					+ 'THREE.Audio instance.' );
+
+			}
+
+			if ( this.configuration.sync ) this._syncDuration();
+
+			return this;
+
+		},
+
+		/**
+		 * Updates the animation.
+		 *
+		 * @param {Number} delta
+		 * @return {THREE.MMDAnimationHelper}
+		 */
+		update: function ( delta ) {
+
+			if ( this.audioManager !== null ) this.audioManager.control( delta );
+
+			for ( var i = 0; i < this.meshes.length; i ++ ) {
+
+				this._animateMesh( this.meshes[ i ], delta );
+
+			}
+
+			if ( this.sharedPhysics ) this._updateSharedPhysics( delta );
+
+			if ( this.camera !== null ) this._animateCamera( this.camera, delta );
+
+			return this;
+
+		},
+
+		/**
+		 * Changes the pose of SkinnedMesh as VPD specifies.
+		 *
+		 * @param {THREE.SkinnedMesh} mesh
+		 * @param {Object} vpd - VPD content parsed MMDParser
+		 * @param {Object} params - (optional)
+		 * @param {boolean} params.resetPose - Default is true.
+		 * @param {boolean} params.ik - Default is true.
+		 * @param {boolean} params.grant - Default is true.
+		 * @return {THREE.MMDAnimationHelper}
+		 */
+		pose: function ( mesh, vpd, params ) {
+
+			params = params || {};
+
+			if ( params.resetPose !== false ) mesh.pose();
+
+			var bones = mesh.skeleton.bones;
+			var boneParams = vpd.bones;
+
+			var boneNameDictionary = {};
+
+			for ( var i = 0, il = bones.length; i < il; i ++ ) {
+
+				boneNameDictionary[ bones[ i ].name ] = i;
+
+			}
+
+			var vector = new THREE.Vector3();
+			var quaternion = new THREE.Quaternion();
+
+			for ( var i = 0, il = boneParams.length; i < il; i ++ ) {
+
+				var boneParam = boneParams[ i ];
+				var boneIndex = boneNameDictionary[ boneParam.name ];
+
+				if ( boneIndex === undefined ) continue;
+
+				var bone = bones[ boneIndex ];
+				bone.position.add( vector.fromArray( boneParam.translation ) );
+				bone.quaternion.multiply( quaternion.fromArray( boneParam.quaternion ) );
+
+			}
+
+			mesh.updateMatrixWorld( true );
+
+			if ( params.ik !== false ) {
+
+				var solver = this._createCCDIKSolver( mesh );
+				solver.update( params.saveOriginalBonesBeforeIK );  // this param is experimental
+
+			}
+
+			if ( params.grant !== false ) {
+
+				var solver = this.createGrantSolver( mesh );
+				solver.update();
+
+			}
+
+			return this;
+
+		},
+
+		/**
+		 * Enabes/Disables an animation feature.
+		 *
+		 * @param {string} key
+		 * @param {boolean} enebled
+		 * @return {THREE.MMDAnimationHelper}
+		 */
+		enable: function ( key, enabled ) {
+
+			if ( this.enabled[ key ] === undefined ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper.enable: '
+					+ 'unknown key ' + key );
+
+			}
+
+			this.enabled[ key ] = enabled;
+
+			if ( key === 'physics' ) {
+
+				for ( var i = 0, il = this.meshes.length; i < il; i ++ ) {
+
+					this._optimizeIK( this.meshes[ i ], enabled );
+
+				}
+
+			}
+
+			return this;
+
+		},
+
+		/**
+		 * Creates an GrantSolver instance.
+		 *
+		 * @param {THREE.SkinnedMesh} mesh
+		 * @return {GrantSolver}
+		 */
+		createGrantSolver: function ( mesh ) {
+
+			return new GrantSolver( mesh );
+
+		},
+
+		// private methods
+
+		_addMesh: function ( mesh, params ) {
+
+			if ( this.meshes.indexOf( mesh ) >= 0 ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper._addMesh: '
+					+ 'SkinnedMesh \'' + mesh.name + '\' has already been added.' );
+
+			}
+
+			this.meshes.push( mesh );
+			this.objects.set( mesh, { looped: false } );
+
+			// workaround until I make IK and Physics Animation plugin
+			this._initBackupBones( mesh );
+
+			if ( params.animation !== undefined ) {
+
+				this._setupMeshAnimation( mesh, params.animation );
+
+			}
+
+			if ( params.physics !== false ) {
+
+				this._setupMeshPhysics( mesh, params );
+
+			}
+
+			return this;
+
+		},
+
+		_setupCamera: function ( camera, params ) {
+
+			if ( this.camera === camera ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper._setupCamera: '
+					+ 'Camera \'' + camera.name + '\' has already been set.' );
+
+			}
+
+			if ( this.camera ) this.clearCamera( this.camera );
+
+			this.camera = camera;
+
+			camera.add( this.cameraTarget );
+
+			this.objects.set( camera, {} );
+
+			if ( params.animation !== undefined ) {
+
+				this._setupCameraAnimation( camera, params.animation )
+
+			}
+
+			return this;
+
+		},
+
+		_setupAudio: function ( audio, params ) {
+
+			if ( this.audio === audio ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper._setupAudio: '
+					+ 'Audio \'' + audio.name + '\' has already been set.' );
+
+			}
+
+			if ( this.audio ) this.clearAudio( this.audio );
+
+			this.audio = audio;
+			this.audioManager = new AudioManager( audio, params );
+
+			this.objects.set( this.audioManager, {
+				duration: this.audioManager.duration
+			} );
+
+			return this;
+
+		},
+
+		_removeMesh: function ( mesh ) {
+
+			var found = false;
+			var writeIndex = 0;
+
+			for ( var i = 0, il = this.meshes.length; i < il; i ++ ) {
+
+				if ( this.meshes[ i ] === mesh ) {
+
+					this.objects.delete( mesh );
+					found = true;
+
+					continue;
+
+				}
+
+				this.meshes[ writeIndex ++ ] = this.meshes[ i ];
+
+			}
+
+			if ( ! found ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper._removeMesh: '
+					+ 'SkinnedMesh \'' + mesh.name + '\' has not been added yet.' );
+
+			}
+
+			this.meshes.length = writeIndex;
+
+			return this;
+
+		},
+
+		_clearCamera: function ( camera ) {
+
+			if ( camera !== this.camera ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper._clearCamera: '
+					+ 'Camera \'' + camera.name + '\' has not been set yet.' );
+
+			}
+
+			this.camera.remove( this.cameraTarget );
+
+			this.params.delete( this.camera );
+			this.camera = null;
+
+			return this;
+
+		},
+
+		_clearAudio: function ( audio ) {
+
+			if ( audio !== this.audio ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper._clearAudio: '
+					+ 'Audio \'' + audio.name + '\' has not been set yet.' );
+
+			}
+
+			this.objects.delete( this.audioManager );
+
+			this.audio = null;
+			this.audioManager = null;
+
+			return this;
+
+		},
+
+		_setupMeshAnimation: function ( mesh, animation ) {
+
+			var animations = Array.isArray( animation )
+				? animation : [ animation ];
+
+			var objects = this.objects.get( mesh );
+
+			objects.mixer = new THREE.AnimationMixer( mesh );
+
+			for ( var i = 0, il = animations.length; i < il; i ++ ) {
+
+				objects.mixer.clipAction( animations[ i ] ).play();
+
+			}
+
+			// TODO: find a workaround not to access ._clip looking like a private property
+			objects.mixer.addEventListener( 'loop', function ( event ) {
+
+				var tracks = event.action._clip.tracks;
+
+				if ( tracks.length > 0 &&
+				     tracks[ 0 ].name.slice( 0, 6 ) !== '.bones' ) return;
+
+				objects.looped = true;
+
+			} );
+
+			objects.ikSolver = this._createCCDIKSolver( mesh );
+			objects.grantSolver = this.createGrantSolver( mesh );
+
+			return this;
+
+		},
+
+		_setupCameraAnimation: function ( camera, animation ) {
+
+			var animations = Array.isArray( animation )
+				? animation : [ animation ];
+
+			var objects = this.objects.get( camera );
+
+			objects.mixer = new THREE.AnimationMixer( camera );
+
+			for ( var i = 0, il = animations.length; i < il; i ++ ) {
+
+				objects.mixer.clipAction( animations[ i ] ).play();
+
+			}
+
+		},
+
+		_setupMeshPhysics: function ( mesh, params ) {
+
+			params = Object.assign( {}, params );
+
+			var objects = this.objects.get( mesh );
+
+			// shared physics is experimental
+
+			if ( params.world === undefined && this.sharedPhysics ) {
+
+				var masterPhysics = this._getMasterPhysics();
+
+				if ( masterPhysics !== null ) world = masterPhysics.world;
+
+			}
+
+			var warmup = params.warmup !== undefined ? params.warmup : 60;
+
+			objects.physics = this._createMMDPhysics( mesh, params );
+
+			if ( objects.mixer && params.animationWarmup !== false ) {
+
+				this._animateMesh( mesh, 0 );
+				objects.physics.reset();
+
+			}
+
+			objects.physics.warmup( warmup );
+
+			this._optimizeIK( mesh, true );
+
+		},
+
+		_animateMesh: function ( mesh, delta ) {
+
+			var objects = this.objects.get( mesh );
+
+			var mixer = objects.mixer;
+			var ikSolver = objects.ikSolver;
+			var grantSolver = objects.grantSolver;
+			var physics = objects.physics;
+			var looped = objects.looped;
+
+			if ( mixer && this.enabled.animation ) {
+
+				// restore/backupBones are workaround
+				// until I make IK, Grant, and Physics Animation plugin
+				this._restoreBones( mesh );
+
+				mixer.update( delta );
+
+				this._backupBones( mesh );
+
+			}
+
+			if ( ikSolver && this.enabled.ik ) {
+
+				ikSolver.update();
+
+			}
+
+			if ( grantSolver && this.enabled.grant ) {
+
+				grantSolver.update();
+
+			}
+
+			if ( looped === true && this.enabled.physics ) {
+
+				if ( physics && this.configuration.resetPhysicsOnLoop ) physics.reset();
+
+				objects.looped = false;
+
+			}
+
+			if ( physics && this.enabled.physics && ! this.sharedPhysics ) {
+
+				physics.update( delta );
+
+			}
+
+		},
+
+		_animateCamera: function ( camera, delta ) {
+
+			var mixer = this.objects.get( camera ).mixer;
+
+			if ( mixer && this.enabled.cameraAnimation ) {
+
+				mixer.update( delta );
+
+				camera.updateProjectionMatrix();
+
+				camera.up.set( 0, 1, 0 );
+				camera.up.applyQuaternion( camera.quaternion );
+				camera.lookAt( this.cameraTarget.position );
+
+			}
+
+		},
+
+		_optimizeIK: function ( mesh, physicsEnabled ) {
+
+			var iks = mesh.geometry.iks;
+			var bones = mesh.geometry.bones;
+
+			for ( var i = 0, il = iks.length; i < il; i ++ ) {
+
+				var ik = iks[ i ];
+				var links = ik.links;
+
+				for ( var j = 0, jl = links.length; j < jl; j ++ ) {
+
+					var link = links[ j ];
+
+					if ( physicsEnabled === true ) {
+
+						// disable IK of the bone the corresponding rigidBody type of which is 1 or 2
+						// because its rotation will be overriden by physics
+						link.enabled = bones[ link.index ].rigidBodyType > 0 ? false : true;
+
+					} else {
+
+						link.enabled = true;
+
+					}
+
+				}
+
+			}
+
+		},
+
+		_createCCDIKSolver: function ( mesh ) {
+
+			if ( THREE.CCDIKSolver === undefined ) {
+
+				throw new Error( 'THREE.MMDAnimationHelper: Import THREE.CCDIKSolver.' );
+
+			}
+
+			return new THREE.CCDIKSolver( mesh );
+
+		},
+
+		_createMMDPhysics: function ( mesh, params ) {
+
+			if ( THREE.MMDPhysics === undefined ) {
+
+				throw new Error( 'THREE.MMDPhysics: Import THREE.MMDPhysics.' );
+
+			}
+
+			return new THREE.MMDPhysics( mesh, params );
+
+		},
+
+		/*
+		 * Detects the longest duration and then sets it to them to sync.
+		 * TODO: Not to access private properties ( ._actions and ._clip )
+		 */
+		_syncDuration: function () {
+
+			var max = 0.0;
+
+			var objects = this.objects;
+			var meshes = this.meshes;
+			var camera = this.camera;
+			var audioManager = this.audioManager;
+
+			// get the longest duration
+
+			for ( var i = 0, il = meshes.length; i < il; i ++ ) {
+
+				var mixer = this.objects.get( meshes[ i ] ).mixer;
+
+				if ( mixer === undefined ) continue;
+
+				for ( var j = 0; j < mixer._actions.length; j ++ ) {
+
+					var clip = mixer._actions[ j ]._clip;
+
+					if ( ! objects.has( clip ) ) {
+
+						objects.set( clip, {
+							duration: clip.duration
+						} )
+
+					}
+
+					max = Math.max( max, objects.get( clip ).duration );
+
+				}
+
+			}
+
+			if ( camera !== null ) {
+
+				var mixer = this.objects.get( camera ).mixer;
+
+				if ( mixer !== undefined ) {
+
+					for ( var i = 0, il = mixer._actions.length; i < il; i ++ ) {
+
+						var clip = mixer._actions[ i ]._clip;
+
+						if ( ! objects.has( clip ) ) {
+
+							objects.set( clip, {
+								duration: clip.duration
+							} )
+
+						}
+
+						max = Math.max( max, objects.get( clip ).duration );
+
+					}
+
+				}
+
+			}
+
+			if ( audioManager !== null ) {
+
+				max = Math.max( max, objects.get( audioManager ).duration );
+
+			}
+
+			max += this.configuration.afterglow;
+
+			// update the duration
+
+			for ( var i = 0, il = this.meshes.length; i < il; i ++ ) {
+
+				var mixer = this.objects.get( this.meshes[ i ] ).mixer;
+
+				if ( mixer === undefined ) continue;
+
+				for ( var j = 0, jl = mixer._actions.length; j < jl; j ++ ) {
+
+					mixer._actions[ j ]._clip.duration = max;
+
+				}
+
+			}
+
+			if ( camera !== null ) {
+
+				var mixer = this.objects.get( camera ).mixer;
+
+				if ( mixer !== undefined ) {
+
+					for ( var i = 0, il = mixer._actions.length; i < il; i ++ ) {
+
+						mixer._actions[ i ]._clip.duration = max;
+
+					}
+
+				}
+
+			}
+
+			if ( audioManager !== null ) {
+
+				audioManager.duration = max;
+
+			}
+
+		},
+
+		// workaround
+
+		/*
+		 * Note: These following three functions are workaround for r74dev.
+		 *       THREE.PropertyMixer.apply() seems to save values into buffer cache
+		 *       when mixer.update() is called.
+		 *       ikSolver.update() and physics.update() change bone position/quaternion
+		 *       without mixer.update() then buffer cache will be inconsistent.
+		 *       So trying to avoid buffer cache inconsistency by doing
+		 *       backup bones position/quaternion right after mixer.update() call
+		 *       and then restore them after rendering.
+		 */
+		_initBackupBones: function ( mesh ) {
+
+			var backupBones = [];
+
+			for ( var i = 0, il = mesh.skeleton.bones.length; i < il; i ++ ) {
+
+				backupBones.push( mesh.skeleton.bones[ i ].clone() );
+
+			}
+
+			this.objects.get( mesh ).backupBones = backupBones;
+
+		},
+
+		_backupBones: function ( mesh ) {
+
+			var objects = this.objects.get( mesh );
+
+			objects.backupBoneIsSaved = true;
+
+			var backupBones = objects.backupBones;
+
+			for ( var i = 0, il = mesh.skeleton.bones.length; i < il; i ++ ) {
+
+				var backupBone = backupBones[ i ];
+				var bone = mesh.skeleton.bones[ i ];
+				backupBone.position.copy( bone.position );
+				backupBone.quaternion.copy( bone.quaternion );
+
+			}
+
+		},
+
+		_restoreBones: function ( mesh ) {
+
+			var objects = this.objects.get( mesh );
+
+			if ( objects.backupBoneIsSaved !== true ) return;
+
+			objects.backupBoneIsSaved = false;
+
+			var backupBones = objects.backupBones;
+
+			for ( var i = 0, il = mesh.skeleton.bones.length; i < il; i ++ ) {
+
+				var bone = mesh.skeleton.bones[ i ];
+				var backupBone = backupBones[ i ];
+				bone.position.copy( backupBone.position );
+				bone.quaternion.copy( backupBone.quaternion );
+
+			}
+
+		},
+
+		// experimental
+
+		_getMasterPhysics: function () {
+
+			if ( this.masterPhysics !== null ) return this.masterPhysics;
+
+			for ( var i = 0, il = this.meshes.length; i < il; i ++ ) {
+
+				var physics = this.meshes[ i ].physics;
+
+				if ( physics !== undefined && physics !== null ) {
+
+					this.masterPhysics = physics;
+					return this.masterPhysics;
+
+				}
+
+			}
+
+			return null;
+
+		},
+
+		_updateSharedPhysics: function ( delta ) {
+
+			if ( this.meshes.length === 0 || ! this.enabled.physics || ! this.sharedPhysics ) return;
+
+			var physics = this._getMasterPhysics();
+
+			if ( physics === null ) return;
+
+			for ( var i = 0, il = this.meshes.length; i < il; i ++ ) {
+
+				var p = this.meshes[ i ].physics;
+
+				if ( p !== null && p !== undefined ) {
+
+					p.updateRigidBodies();
+
+				}
+
+			}
+
+			physics.stepSimulation( delta );
+
+			for ( var i = 0, il = this.meshes.length; i < il; i ++ ) {
+
+				var p = this.meshes[ i ].physics;
+
+				if ( p !== null && p !== undefined ) {
+
+					p.updateBones();
+
+				}
+
+			}
+
+		}
+
+	};
+
+	//
+
+	/**
+	 * @param {THREE.Audio} audio
+	 * @param {Object} params - (optional)
+	 * @param {Nuumber} params.delayTime
+	 */
+	function AudioManager( audio, params ) {
+
+		params = params || {};
+
+		this.audio = audio;
+
+		this.elapsedTime = 0.0;
+		this.currentTime = 0.0;
+		this.delayTime = params.delayTime !== undefined
+			? params.delayTime : 0.0;
+
+		this.audioDuration = this.audio.buffer.duration;
+		this.duration = this.audioDuration + this.delayTime;
+
+	}
+
+	AudioManager.prototype = {
+
+		constructor: AudioManager,
+
+		/**
+		 * @param {Number} delta
+		 * @return {AudioManager}
+		 */
+		control: function ( delta ) {
+
+			this.elapsed += delta;
+			this.currentTime += delta;
+
+			if ( this._shouldStopAudio() ) this.audio.stop();
+			if ( this._shouldStartAudio() ) this.audio.play();
+
+			return this;
+
+		},
+
+		// private methods
+
+		_shouldStartAudio: function () {
+
+			if ( this.audio.isPlaying ) return false;
+
+			while ( this.currentTime >= this.duration ) {
+
+				this.currentTime -= this.duration;
+
+			}
+
+			if ( this.currentTime < this.delayTime ) return false;
+
+			this.audio.startTime = this.currentTime - this.delayTime;
+
+			return true;
+
+		},
+
+		_shouldStopAudio: function () {
+
+			return this.audio.isPlaying &&
+				this.currentTime >= this.duration;
+
+		}
+
+	};
+
+	/**
+	 * @param {THREE.SkinnedMesh} mesh
+	 */
+	function GrantSolver( mesh ) {
+
+		this.mesh = mesh;
+
+	}
+
+	GrantSolver.prototype = {
+
+		constructor: GrantSolver,
+
+		/**
+		 * @return {GrantSolver}
+		 */
+		update: function () {
+
+			var quaternion = new THREE.Quaternion();
+
+			return function () {
+
+				for ( var i = 0, il = this.mesh.geometry.grants.length; i < il; i ++ ) {
+
+					var grant = this.mesh.geometry.grants[ i ];
+					var bone = this.mesh.skeleton.bones[ grant.index ];
+					var parentBone = this.mesh.skeleton.bones[ grant.parentIndex ];
+
+					if ( grant.isLocal ) {
+
+						// TODO: implement
+						if ( grant.affectPosition ) {
+
+						}
+
+						// TODO: implement
+						if ( grant.affectRotation ) {
+
+						}
+
+					} else {
+
+						// TODO: implement
+						if ( grant.affectPosition ) {
+
+						}
+
+						if ( grant.affectRotation ) {
+
+							quaternion.set( 0, 0, 0, 1 );
+							quaternion.slerp( parentBone.quaternion, grant.ratio );
+							bone.quaternion.multiply( quaternion );
+
+						}
+
+					}
+
+				}
+
+				this;
+
+			};
+
+		}()
+
+	};
+
+	return MMDAnimationHelper;
+
+} )();