C++ EntityTreePointer::getRecentlyDeletedEntityIDs方法代码示例

// FIXME - most of the old code for this was encapsulated in EntityTree, I liked that design from a data
// hiding and object oriented perspective. But that didn't really allow us to handle the case of lots
// of entities being deleted at the same time. I'd like to look to move this back into EntityTree but
// for now this works and addresses the bug.
int EntityServer::sendSpecialPackets(const SharedNodePointer& node, OctreeQueryNode* queryNode, int& packetsSent) {
    int totalBytes = 0;

    EntityNodeData* nodeData = static_cast<EntityNodeData*>(node->getLinkedData());
    if (nodeData) {

        quint64 deletedEntitiesSentAt = nodeData->getLastDeletedEntitiesSentAt();
        quint64 considerEntitiesSince = EntityTree::getAdjustedConsiderSince(deletedEntitiesSentAt);

        quint64 deletePacketSentAt = usecTimestampNow();
        EntityTreePointer tree = std::static_pointer_cast<EntityTree>(_tree);
        auto recentlyDeleted = tree->getRecentlyDeletedEntityIDs();

        packetsSent = 0;

        // create a new special packet
        std::unique_ptr<NLPacket> deletesPacket = NLPacket::create(PacketType::EntityErase);

        // pack in flags
        OCTREE_PACKET_FLAGS flags = 0;
        deletesPacket->writePrimitive(flags);

        // pack in sequence number
        auto sequenceNumber = queryNode->getSequenceNumber();
        deletesPacket->writePrimitive(sequenceNumber);

        // pack in timestamp
        OCTREE_PACKET_SENT_TIME now = usecTimestampNow();
        deletesPacket->writePrimitive(now);

        // figure out where we are now and pack a temporary number of IDs
        uint16_t numberOfIDs = 0;
        qint64 numberOfIDsPos = deletesPacket->pos();
        deletesPacket->writePrimitive(numberOfIDs);

        // we keep a multi map of entity IDs to timestamps, we only want to include the entity IDs that have been
        // deleted since we last sent to this node
        auto it = recentlyDeleted.constBegin();
        while (it != recentlyDeleted.constEnd()) {

            // if the timestamp is more recent then out last sent time, include it
            if (it.key() > considerEntitiesSince) {

                // get all the IDs for this timestamp
                const auto& entityIDsFromTime = recentlyDeleted.values(it.key());

                for (const auto& entityID : entityIDsFromTime) {

                    // check to make sure we have room for one more ID, if we don't have more
                    // room, then send out this packet and create another one
                    if (NUM_BYTES_RFC4122_UUID > deletesPacket->bytesAvailableForWrite()) {

                        // replace the count for the number of included IDs
                        deletesPacket->seek(numberOfIDsPos);
                        deletesPacket->writePrimitive(numberOfIDs);

                        // Send the current packet
                        queryNode->packetSent(*deletesPacket);
                        auto thisPacketSize = deletesPacket->getDataSize();
                        totalBytes += thisPacketSize;
                        packetsSent++;
                        DependencyManager::get<NodeList>()->sendPacket(std::move(deletesPacket), *node);

                        #ifdef EXTRA_ERASE_DEBUGGING
                            qDebug() << "EntityServer::sendSpecialPackets() sending packet packetsSent[" << packetsSent << "] size:" << thisPacketSize;
                        #endif


                        // create another packet
                        deletesPacket = NLPacket::create(PacketType::EntityErase);

                        // pack in flags
                        deletesPacket->writePrimitive(flags);

                        // pack in sequence number
                        sequenceNumber = queryNode->getSequenceNumber();
                        deletesPacket->writePrimitive(sequenceNumber);

                        // pack in timestamp
                        deletesPacket->writePrimitive(now);

                        // figure out where we are now and pack a temporary number of IDs
                        numberOfIDs = 0;
                        numberOfIDsPos = deletesPacket->pos();
                        deletesPacket->writePrimitive(numberOfIDs);
                    }

                    // FIXME - we still seem to see cases where incorrect EntityIDs get sent from the server
                    // to the client. These were causing "lost" entities like flashlights and laser pointers
                    // now that we keep around some additional history of the erased entities and resend that
                    // history for a longer time window, these entities are not "lost". But we haven't yet
                    // found/fixed the underlying issue that caused bad UUIDs to be sent to some users.
                    deletesPacket->write(entityID.toRfc4122());
                    ++numberOfIDs;

                    #ifdef EXTRA_ERASE_DEBUGGING
//.........这里部分代码省略.........