update( delta ) {

			if ( this.audioManager !== null ) this.audioManager.control( delta );

			for ( let 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;

		}
Updates the animation.

@param {Number} delta
@return {MMDAnimationHelper}