C++ EntityItemProperties::setSimulatorID方法代码示例

void EntityMotionState::sendUpdate(OctreeEditPacketSender* packetSender, const QUuid& sessionID, uint32_t step) {
    assert(_entity);
    assert(_entity->isKnownID());

    bool active = _body->isActive();
    if (!active) {
        // make sure all derivatives are zero
        glm::vec3 zero(0.0f);
        _entity->setVelocity(zero);
        _entity->setAngularVelocity(zero);
        _entity->setAcceleration(zero);
        _sentActive = false;
    } else {
        float gravityLength = glm::length(_entity->getGravity());
        float accVsGravity = glm::abs(glm::length(_measuredAcceleration) - gravityLength);
        if (accVsGravity < ACCELERATION_EQUIVALENT_EPSILON_RATIO * gravityLength) {
            // acceleration measured during the most recent simulation step was close to gravity.
            if (getAccelerationNearlyGravityCount() < STEPS_TO_DECIDE_BALLISTIC) {
                // only increment this if we haven't reached the threshold yet.  this is to avoid
                // overflowing the counter.
                incrementAccelerationNearlyGravityCount();
            }
        } else {
            // acceleration wasn't similar to this entities gravity, so reset the went-ballistic counter
            resetAccelerationNearlyGravityCount();
        }

        // if this entity has been accelerated at close to gravity for a certain number of simulation-steps, let
        // the entity server's estimates include gravity.
        if (getAccelerationNearlyGravityCount() >= STEPS_TO_DECIDE_BALLISTIC) {
            _entity->setAcceleration(_entity->getGravity());
        } else {
            _entity->setAcceleration(glm::vec3(0.0f));
        }

        const float DYNAMIC_LINEAR_VELOCITY_THRESHOLD = 0.05f;  // 5 cm/sec
        const float DYNAMIC_ANGULAR_VELOCITY_THRESHOLD = 0.087266f;  // ~5 deg/sec
        bool movingSlowly = glm::length2(_entity->getVelocity()) < (DYNAMIC_LINEAR_VELOCITY_THRESHOLD * DYNAMIC_LINEAR_VELOCITY_THRESHOLD)
            && glm::length2(_entity->getAngularVelocity()) < (DYNAMIC_ANGULAR_VELOCITY_THRESHOLD * DYNAMIC_ANGULAR_VELOCITY_THRESHOLD)
            && _entity->getAcceleration() == glm::vec3(0.0f);

        if (movingSlowly) {
            // velocities might not be zero, but we'll fake them as such, which will hopefully help convince
            // other simulating observers to deactivate their own copies
            glm::vec3 zero(0.0f);
            _entity->setVelocity(zero);
            _entity->setAngularVelocity(zero);
        }
        _sentActive = true;
    }

    // remember properties for local server prediction
    _serverPosition = _entity->getPosition();
    _serverRotation = _entity->getRotation();
    _serverVelocity = _entity->getVelocity();
    _serverAcceleration = _entity->getAcceleration();
    _serverAngularVelocity = _entity->getAngularVelocity();

    EntityItemProperties properties = _entity->getProperties();

    // explicitly set the properties that changed so that they will be packed
    properties.setPosition(_serverPosition);
    properties.setRotation(_serverRotation);
    properties.setVelocity(_serverVelocity);
    properties.setAcceleration(_serverAcceleration);
    properties.setAngularVelocity(_serverAngularVelocity);

    // we only update lastEdited when we're sending new physics data 
    quint64 lastSimulated = _entity->getLastSimulated();
    _entity->setLastEdited(lastSimulated);
    properties.setLastEdited(lastSimulated);

    #ifdef WANT_DEBUG
        quint64 now = usecTimestampNow();
        qCDebug(physics) << "EntityMotionState::sendUpdate()";
        qCDebug(physics) << "        EntityItemId:" << _entity->getEntityItemID()
                         << "---------------------------------------------";
        qCDebug(physics) << "       lastSimulated:" << debugTime(lastSimulated, now);
    #endif //def WANT_DEBUG

    if (sessionID == _entity->getSimulatorID()) {
        // we think we own the simulation
        if (!active) {
            // we own the simulation but the entity has stopped, so we tell the server that we're clearing simulatorID
            // but we remember that we do still own it...  and rely on the server to tell us that we don't
            properties.setSimulatorID(QUuid());
        } else {
            // explicitly set the property's simulatorID so that it is flagged as changed and will be packed
            properties.setSimulatorID(sessionID);
        }
    } else {
        // we don't own the simulation for this entity yet, but we're sending a bid for it
        properties.setSimulatorID(sessionID);
    }

    if (EntityItem::getSendPhysicsUpdates()) {
        EntityItemID id(_entity->getID());
        EntityEditPacketSender* entityPacketSender = static_cast<EntityEditPacketSender*>(packetSender);
        #ifdef WANT_DEBUG
            qCDebug(physics) << "EntityMotionState::sendUpdate()... calling queueEditEntityMessage()...";
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