////  EntityTreeHeadlessViewer.h//  libraries/models/src////  Created by Brad Hefta-Gaub on 2/26/14.//  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// #ifndef hifi_EntityTreeHeadlessViewer_h#define hifi_EntityTreeHeadlessViewer_h #include <udt/PacketHeaders.h>#include <SharedUtil.h>#include <Octree.h>#include <OctreePacketData.h>#include <ViewFrustum.h> #include "../octree/OctreeHeadlessViewer.h"#include "EntityTree.h" class EntitySimulation; /*@jsdoc * The <code>EntityViewer</code> API provides a headless viewer for assignment client scripts, so that they can "see" entities  * in order for them to be available in the {@link Entities} API. * * @namespace EntityViewer * * @hifi-assignment-client */// API functions are defined in OctreeHeadlessViewer. // Generic client side Octree renderer class.class EntityTreeHeadlessViewer : public OctreeHeadlessViewer {    Q_OBJECTpublic:    EntityTreeHeadlessViewer();    virtual ~EntityTreeHeadlessViewer();     virtual char getMyNodeType() const override { return NodeType::EntityServer; }    virtual PacketType getMyQueryMessageType() const override { return PacketType::EntityQuery; }    virtual PacketType getExpectedPacketType() const override { return PacketType::EntityData; }     void update();     EntityTreePointer getTree() { return std::static_pointer_cast<EntityTree>(_tree); }     void processEraseMessage(ReceivedMessage& message, const SharedNodePointer& sourceNode);     virtual void init() override; protected:    virtual OctreePointer createTree() override {        EntityTreePointer newTree = std::make_shared<EntityTree>(true);        newTree->createRootElement();        return newTree;    }     EntitySimulationPointer _simulation;}; #endif // hifi_EntityTreeHeadlessViewer_h