////  Overlay.cpp//  interface/src/ui/overlays////  Copyright 2014 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 "Overlay.h" #include <NumericalConstants.h>#include <RegisteredMetaTypes.h> #include "Application.h" Overlay::Overlay() :    _renderItemID(render::Item::INVALID_ITEM_ID){} Overlay::Overlay(const Overlay* overlay) :    _renderItemID(render::Item::INVALID_ITEM_ID),    _visible(overlay->_visible){} void Overlay::setProperties(const QVariantMap& properties) {    if (properties["visible"].isValid()) {        bool visible = properties["visible"].toBool();        setVisible(visible);    }} bool Overlay::addToScene(Overlay::Pointer overlay, const render::ScenePointer& scene, render::Transaction& transaction) {    _renderItemID = scene->allocateID();    transaction.resetItem(_renderItemID, std::make_shared<Overlay::Payload>(overlay));    return true;} void Overlay::removeFromScene(Overlay::Pointer overlay, const render::ScenePointer& scene, render::Transaction& transaction) {    transaction.removeItem(_renderItemID);    render::Item::clearID(_renderItemID);} render::ItemKey Overlay::getKey() {    auto builder = render::ItemKey::Builder().withTypeShape().withTypeMeta();     builder.withViewSpace();    builder.withLayer(render::hifi::LAYER_2D);     if (!_visible) {        builder.withInvisible();    }     render::hifi::Tag viewTagBits = render::hifi::TAG_ALL_VIEWS;    builder.withTagBits(viewTagBits);     return builder.build();}