////  Grab.cpp//  libraries/avatars/src////  Created by Seth Alves on 2018-9-1.//  Copyright 2018 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "Grab.h" QByteArray Grab::toByteArray() {    QByteArray ba;    QDataStream dataStream(&ba, QIODevice::WriteOnly);    const int dataEncodingVersion = 1;    dataStream << dataEncodingVersion << _ownerID << _targetID << _parentJointIndex               << _hand << _positionalOffset << _rotationalOffset;    return ba;} bool Grab::fromByteArray(const QByteArray& grabData) {    QDataStream dataStream(grabData);     int dataEncodingVersion;    QUuid newOwnerID { QUuid() };    QUuid newTargetID { QUuid() };    int newParentJointIndex { -1 };    QString newHand { "none" };    glm::vec3 newPositionalOffset { glm::vec3(0.0f) };    glm::quat newRotationalOffset { glm::quat() };     dataStream >> dataEncodingVersion;    assert(dataEncodingVersion == 1);    dataStream >> newOwnerID;    dataStream >> newTargetID;    dataStream >> newParentJointIndex;    dataStream >> newHand;    dataStream >> newPositionalOffset;    dataStream >> newRotationalOffset;     bool somethingChanged { false };    if (_ownerID != newOwnerID) {        _ownerID = newOwnerID;        somethingChanged = true;    }    if (_targetID != newTargetID) {        _targetID = newTargetID;        somethingChanged = true;    }    if (_parentJointIndex != newParentJointIndex) {        _parentJointIndex = newParentJointIndex;        somethingChanged = true;    }    if (_hand != newHand) {        _hand = newHand;        somethingChanged = true;    }    if (_positionalOffset != newPositionalOffset) {        _positionalOffset = newPositionalOffset;        somethingChanged = true;    }    if (_rotationalOffset != newRotationalOffset) {        _rotationalOffset = newRotationalOffset;        somethingChanged = true;    }     return somethingChanged;}