UAS.cc

    }
    else
    {
        stopHil();
    }
}
#endif

/**
* If enabled, connect the X-plane gear link.
*/
#ifndef __mobile__
void UAS::enableHilXPlane(bool enable)
{
    QGCXPlaneLink* link = dynamic_cast<QGCXPlaneLink*>(simulation);
    if (!link || !simulation) {
        if (simulation) {
            stopHil();
            delete simulation;
        }
        qDebug() << "CREATED NEW XPLANE LINK";
        simulation = new QGCXPlaneLink(this);

        float noise_scaler = 0.1f;
        xacc_var = noise_scaler * 1.2914f;
        yacc_var = noise_scaler * 0.7048f;
        zacc_var = noise_scaler * 1.9577f;
        rollspeed_var = noise_scaler * 0.8126f;
        pitchspeed_var = noise_scaler * 0.6145f;
        yawspeed_var = noise_scaler * 0.5852f;
        xmag_var = noise_scaler * 0.4786f;
        ymag_var = noise_scaler * 0.4566f;
        zmag_var = noise_scaler * 0.3333f;
        abs_pressure_var = noise_scaler * 1.1604f;
        diff_pressure_var = noise_scaler * 0.6604f;
        pressure_alt_var = noise_scaler * 1.1604f;
        temperature_var = noise_scaler * 2.4290f;
    }
    // Connect X-Plane Link
    if (enable)
    {
        startHil();
    }
    else
    {
        stopHil();
    }
}
#endif

/**
* @param time_us Timestamp (microseconds since UNIX epoch or microseconds since system boot)
* @param roll Roll angle (rad)
* @param pitch Pitch angle (rad)
* @param yaw Yaw angle (rad)
* @param rollspeed Roll angular speed (rad/s)
* @param pitchspeed Pitch angular speed (rad/s)
* @param yawspeed Yaw angular speed (rad/s)
* @param lat Latitude, expressed as * 1E7
* @param lon Longitude, expressed as * 1E7
* @param alt Altitude in meters, expressed as * 1000 (millimeters)
* @param vx Ground X Speed (Latitude), expressed as m/s * 100
* @param vy Ground Y Speed (Longitude), expressed as m/s * 100
* @param vz Ground Z Speed (Altitude), expressed as m/s * 100
* @param xacc X acceleration (mg)
* @param yacc Y acceleration (mg)
* @param zacc Z acceleration (mg)
*/
#ifndef __mobile__
void UAS::sendHilGroundTruth(quint64 time_us, float roll, float pitch, float yaw, float rollspeed,
                       float pitchspeed, float yawspeed, double lat, double lon, double alt,
                       float vx, float vy, float vz, float ind_airspeed, float true_airspeed, float xacc, float yacc, float zacc)
{
    Q_UNUSED(time_us);
    Q_UNUSED(xacc);
    Q_UNUSED(yacc);
    Q_UNUSED(zacc);

        // Emit attitude for cross-check
        emit valueChanged(uasId, "roll sim", "rad", roll, getUnixTime());
        emit valueChanged(uasId, "pitch sim", "rad", pitch, getUnixTime());
        emit valueChanged(uasId, "yaw sim", "rad", yaw, getUnixTime());

        emit valueChanged(uasId, "roll rate sim", "rad/s", rollspeed, getUnixTime());
        emit valueChanged(uasId, "pitch rate sim", "rad/s", pitchspeed, getUnixTime());
        emit valueChanged(uasId, "yaw rate sim", "rad/s", yawspeed, getUnixTime());

        emit valueChanged(uasId, "lat sim", "deg", lat*1e7, getUnixTime());
        emit valueChanged(uasId, "lon sim", "deg", lon*1e7, getUnixTime());
        emit valueChanged(uasId, "alt sim", "deg", alt*1e3, getUnixTime());

        emit valueChanged(uasId, "vx sim", "m/s", vx*1e2, getUnixTime());
        emit valueChanged(uasId, "vy sim", "m/s", vy*1e2, getUnixTime());
        emit valueChanged(uasId, "vz sim", "m/s", vz*1e2, getUnixTime());

        emit valueChanged(uasId, "IAS sim", "m/s", ind_airspeed, getUnixTime());
        emit valueChanged(uasId, "TAS sim", "m/s", true_airspeed, getUnixTime());
}
#endif

/**
* @param time_us Timestamp (microseconds since UNIX epoch or microseconds since system boot)
* @param roll Roll angle (rad)
* @param pitch Pitch angle (rad)
* @param yaw Yaw angle (rad)
* @param rollspeed Roll angular speed (rad/s)
* @param pitchspeed Pitch angular speed (rad/s)
* @param yawspeed Yaw angular speed (rad/s)
* @param lat Latitude, expressed as * 1E7
* @param lon Longitude, expressed as * 1E7
* @param alt Altitude in meters, expressed as * 1000 (millimeters)
* @param vx Ground X Speed (Latitude), expressed as m/s * 100
* @param vy Ground Y Speed (Longitude), expressed as m/s * 100
* @param vz Ground Z Speed (Altitude), expressed as m/s * 100
* @param xacc X acceleration (mg)
* @param yacc Y acceleration (mg)
* @param zacc Z acceleration (mg)
*/
#ifndef __mobile__
void UAS::sendHilState(quint64 time_us, float roll, float pitch, float yaw, float rollspeed,
                       float pitchspeed, float yawspeed, double lat, double lon, double alt,
                       float vx, float vy, float vz, float ind_airspeed, float true_airspeed, float xacc, float yacc, float zacc)
{
    if (!_vehicle) {
        return;
    }
    
    if (this->base_mode & MAV_MODE_FLAG_HIL_ENABLED)
    {
        float q[4];

        double cosPhi_2 = cos(double(roll) / 2.0);
        double sinPhi_2 = sin(double(roll) / 2.0);
        double cosTheta_2 = cos(double(pitch) / 2.0);
        double sinTheta_2 = sin(double(pitch) / 2.0);
        double cosPsi_2 = cos(double(yaw) / 2.0);
        double sinPsi_2 = sin(double(yaw) / 2.0);
        q[0] = (cosPhi_2 * cosTheta_2 * cosPsi_2 +
                sinPhi_2 * sinTheta_2 * sinPsi_2);
        q[1] = (sinPhi_2 * cosTheta_2 * cosPsi_2 -
                cosPhi_2 * sinTheta_2 * sinPsi_2);
        q[2] = (cosPhi_2 * sinTheta_2 * cosPsi_2 +
                sinPhi_2 * cosTheta_2 * sinPsi_2);
        q[3] = (cosPhi_2 * cosTheta_2 * sinPsi_2 -
                sinPhi_2 * sinTheta_2 * cosPsi_2);

        mavlink_message_t msg;
        mavlink_msg_hil_state_quaternion_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, q, rollspeed, pitchspeed, yawspeed,
                                   lat*1e7f, lon*1e7f, alt*1000, vx*100, vy*100, vz*100, ind_airspeed*100, true_airspeed*100, xacc*1000/9.81, yacc*1000/9.81, zacc*1000/9.81);
        _vehicle->sendMessage(msg);
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }
}
#endif

#ifndef __mobile__
float UAS::addZeroMeanNoise(float truth_meas, float noise_var)
{
    /* Calculate normally distributed variable noise with mean = 0 and variance = noise_var.  Calculated according to 
    Box-Muller transform */
    static const float epsilon = std::numeric_limits<float>::min(); //used to ensure non-zero uniform numbers
    static const float two_pi = 2.0f * 3.14159265358979323846f; // 2*pi
    static float z0; //calculated normal distribution random variables with mu = 0, var = 1;
    float u1, u2;        //random variables generated from c++ rand();
    
    /*Generate random variables in range (0 1] */
    do
    {
        //TODO seed rand() with srand(time) but srand(time should be called once on startup)
        //currently this will generate repeatable random noise
        u1 = rand() * (1.0 / RAND_MAX);
        u2 = rand() * (1.0 / RAND_MAX);
    }
    while ( u1 <= epsilon );  //Have a catch to ensure non-zero for log()

    z0 = sqrt(-2.0 * log(u1)) * cos(two_pi * u2); //calculate normally distributed variable with mu = 0, var = 1
    
    //TODO add bias term that changes randomly to simulate accelerometer and gyro bias the exf should handle these
    //as well
    float noise = z0 * (noise_var*noise_var); //calculate normally distributed variable with mu = 0, std = var^2  
    
    //Finally gaurd against any case where the noise is not real
    if(std::isfinite(noise)){
            return truth_meas + noise;
    }
    else{
        return truth_meas;
    }
}
#endif

/*
* @param abs_pressure Absolute Pressure (hPa)
* @param diff_pressure Differential Pressure  (hPa)
*/
#ifndef __mobile__
void UAS::sendHilSensors(quint64 time_us, float xacc, float yacc, float zacc, float rollspeed, float pitchspeed, float yawspeed,
                                    float xmag, float ymag, float zmag, float abs_pressure, float diff_pressure, float pressure_alt, float temperature, quint32 fields_changed)
{
    if (!_vehicle) {
        return;
    }
    
    if (this->base_mode & MAV_MODE_FLAG_HIL_ENABLED)
    {
        float xacc_corrupt = addZeroMeanNoise(xacc, xacc_var);
        float yacc_corrupt = addZeroMeanNoise(yacc, yacc_var);
        float zacc_corrupt = addZeroMeanNoise(zacc, zacc_var);
        float rollspeed_corrupt = addZeroMeanNoise(rollspeed,rollspeed_var);
        float pitchspeed_corrupt = addZeroMeanNoise(pitchspeed,pitchspeed_var);
        float yawspeed_corrupt = addZeroMeanNoise(yawspeed,yawspeed_var);
        float xmag_corrupt = addZeroMeanNoise(xmag, xmag_var);
        float ymag_corrupt = addZeroMeanNoise(ymag, ymag_var);
        float zmag_corrupt = addZeroMeanNoise(zmag, zmag_var);
        float abs_pressure_corrupt = addZeroMeanNoise(abs_pressure,abs_pressure_var);
        float diff_pressure_corrupt = addZeroMeanNoise(diff_pressure, diff_pressure_var);
        float pressure_alt_corrupt = addZeroMeanNoise(pressure_alt, pressure_alt_var);
        float temperature_corrupt = addZeroMeanNoise(temperature,temperature_var);

        mavlink_message_t msg;
        mavlink_msg_hil_sensor_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, xacc_corrupt, yacc_corrupt, zacc_corrupt, rollspeed_corrupt, pitchspeed_corrupt,
                                    yawspeed_corrupt, xmag_corrupt, ymag_corrupt, zmag_corrupt, abs_pressure_corrupt, 
                                    diff_pressure_corrupt, pressure_alt_corrupt, temperature_corrupt, fields_changed);
        _vehicle->sendMessage(msg);
        lastSendTimeSensors = QGC::groundTimeMilliseconds();
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }
}
#endif

#ifndef __mobile__
void UAS::sendHilOpticalFlow(quint64 time_us, qint16 flow_x, qint16 flow_y, float flow_comp_m_x,
                    float flow_comp_m_y, quint8 quality, float ground_distance)
{
    if (!_vehicle) {
        return;
    }
    
    // FIXME: This needs to be updated for new mavlink_msg_hil_optical_flow_pack api

    Q_UNUSED(time_us);
    Q_UNUSED(flow_x);
    Q_UNUSED(flow_y);
    Q_UNUSED(flow_comp_m_x);
    Q_UNUSED(flow_comp_m_y);
    Q_UNUSED(quality);
    Q_UNUSED(ground_distance);

    if (this->base_mode & MAV_MODE_FLAG_HIL_ENABLED)
    {
#if 0
        mavlink_message_t msg;
        mavlink_msg_hil_optical_flow_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, 0, 0 /* hack */, flow_x, flow_y, 0.0f /* hack */, 0.0f /* hack */, 0.0f /* hack */, 0 /* hack */, quality, ground_distance);

        _vehicle->sendMessage(msg);
        lastSendTimeOpticalFlow = QGC::groundTimeMilliseconds();
#endif
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }

}
#endif

#ifndef __mobile__
void UAS::sendHilGps(quint64 time_us, double lat, double lon, double alt, int fix_type, float eph, float epv, float vel, float vn, float ve, float vd, float cog, int satellites)
{
    if (!_vehicle) {
        return;
    }
    
    // Only send at 10 Hz max rate
    if (QGC::groundTimeMilliseconds() - lastSendTimeGPS < 100)
        return;

    if (this->base_mode & MAV_MODE_FLAG_HIL_ENABLED)
    {
        float course = cog;
        // map to 0..2pi
        if (course < 0)
            course += 2.0f * static_cast<float>(M_PI);
        // scale from radians to degrees
        course = (course / M_PI) * 180.0f;

        mavlink_message_t msg;
        mavlink_msg_hil_gps_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg,
                                   time_us, fix_type, lat*1e7, lon*1e7, alt*1e3, eph*1e2, epv*1e2, vel*1e2, vn*1e2, ve*1e2, vd*1e2, course*1e2, satellites);
        lastSendTimeGPS = QGC::groundTimeMilliseconds();
        _vehicle->sendMessage(msg);
    }
    else
    {
        // Attempt to set HIL mode
        _vehicle->setHilMode(true);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    }
}
#endif

/**
* Connect flight gear link.
**/
#ifndef __mobile__
void UAS::startHil()
{
    if (hilEnabled) return;
    hilEnabled = true;
    sensorHil = false;
    _vehicle->setHilMode(true);
    qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to enable.";
    // Connect HIL simulation link
    simulation->connectSimulation();
}
#endif

/**
* disable flight gear link.
*/
#ifndef __mobile__
void UAS::stopHil()
{
    if (simulation && simulation->isConnected()) {
        simulation->disconnectSim();
        _vehicle->setHilMode(false);
        qDebug() << __FILE__ << __LINE__ << "HIL is onboard not enabled, trying to disable.";
    }
    hilEnabled = false;
    sensorHil = false;
}
#endif

/**
 * @return The name of this system as string in human-readable form
 */
QString UAS::getUASName(void) const
{
    QString result;
    if (name == "")
    {
        result = tr("MAV ") + result.sprintf("%03d", getUASID());
    }
    else
    {
        result = name;
    }
    return result;
}

/**
* @rerturn the map of the components
*/
QMap<int, QString> UAS::getComponents()
{
    return components;
}

/**
 * @return charge level in percent - 0 - 100
 */
float UAS::getChargeLevel()
{
    return chargeLevel;
}

void UAS::startLowBattAlarm()
{
    if (!lowBattAlarm)
    {
        _say(tr("System %1 has low battery").arg(getUASID()));
        lowBattAlarm = true;
    }
}

void UAS::stopLowBattAlarm()
{
    if (lowBattAlarm)
    {
        lowBattAlarm = false;
    }
}

void UAS::sendMapRCToParam(QString param_id, float scale, float value0, quint8 param_rc_channel_index, float valueMin, float valueMax)
{
    if (!_vehicle) {
        return;
    }
    
    mavlink_message_t message;

    char param_id_cstr[MAVLINK_MSG_PARAM_MAP_RC_FIELD_PARAM_ID_LEN] = {};
    // Copy string into buffer, ensuring not to exceed the buffer size
    for (unsigned int i = 0; i < sizeof(param_id_cstr); i++)
    {
        if ((int)i < param_id.length())
        {
            param_id_cstr[i] = param_id.toLatin1()[i];
        }
    }

    mavlink_msg_param_map_rc_pack(mavlink->getSystemId(),
                                  mavlink->getComponentId(),
                                  &message,
                                  this->uasId,
                                  0,
                                  param_id_cstr,
                                  -1,
                                  param_rc_channel_index,
                                  value0,
                                  scale,
                                  valueMin,
                                  valueMax);
    _vehicle->sendMessage(message);
    qDebug() << "Mavlink message sent";
}

void UAS::unsetRCToParameterMap()
{
    if (!_vehicle) {
        return;
    }
    
    char param_id_cstr[MAVLINK_MSG_PARAM_MAP_RC_FIELD_PARAM_ID_LEN] = {};

    for (int i = 0; i < 3; i++) {
        mavlink_message_t message;
        mavlink_msg_param_map_rc_pack(mavlink->getSystemId(),
                                      mavlink->getComponentId(),
                                      &message,
                                      this->uasId,
                                      0,
                                      param_id_cstr,
                                      -2,
                                      i,
                                      0.0f,
                                      0.0f,
                                      0.0f,
                                      0.0f);
        _vehicle->sendMessage(message);
    }
}

void UAS::_say(const QString& text, int severity)
{
#ifndef UNITTEST_BUILD    
    GAudioOutput::instance()->say(text, severity);
#else
    Q_UNUSED(text)
    Q_UNUSED(severity)
#endif
}