Pixhawk3DWidget.cc

///*=====================================================================
//
//QGroundControl Open Source Ground Control Station
//
//(c) 2009, 2010 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
//
//This file is part of the QGROUNDCONTROL project
//
//    QGROUNDCONTROL is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    QGROUNDCONTROL is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
//
//======================================================================*/

/**
 * @file
 *   @brief Definition of the class Pixhawk3DWidget.
 *
 *   @author Lionel Heng <hengli@inf.ethz.ch>
 *
 */

#include "Pixhawk3DWidget.h"

#include <sstream>

#include <osg/Geode>
#include <osg/Image>
#include <osgDB/ReadFile>
#include <osg/LineWidth>
#include <osg/ShapeDrawable>

#include "PixhawkCheetahGeode.h"
#include "UASManager.h"

#include "QGC.h"
#include "gpl.h"

#if defined(QGC_PROTOBUF_ENABLED) && defined(QGC_USE_PIXHAWK_MESSAGES)
#include <tr1/memory>
#include <pixhawk/pixhawk.pb.h>
#endif

Pixhawk3DWidget::Pixhawk3DWidget(QWidget* parent)
    : Q3DWidget(parent)
    , uas(NULL)
    , kMessageTimeout(4.0)
    , mode(DEFAULT_MODE)
    , selectedWpIndex(-1)
    , displayLocalGrid(false)
    , displayWorldGrid(true)
    , displayTrails(true)
    , displayImagery(true)
    , displayWaypoints(true)
    , displayRGBD2D(false)
    , displayRGBD3D(true)
    , displayObstacleList(true)
    , displayPath(true)
    , enableRGBDColor(false)
    , enableTarget(false)
    , followCamera(true)
    , frame(MAV_FRAME_LOCAL_NED)
    , lastRobotX(0.0f)
    , lastRobotY(0.0f)
    , lastRobotZ(0.0f)
{
    setCameraParams(2.0f, 30.0f, 0.01f, 10000.0f);
    init(15.0f);

    // generate Pixhawk Cheetah model
    vehicleModel = PixhawkCheetahGeode::instance();
    egocentricMap->addChild(vehicleModel);

    // generate grid models
    localGridNode = createLocalGrid();
    rollingMap->addChild(localGridNode);

    worldGridNode = createWorldGrid();
    allocentricMap->addChild(worldGridNode);

    // generate empty trail model
    trailNode = new osg::Geode;
    rollingMap->addChild(trailNode);

    orientationNode = new osg::Group;
    rollingMap->addChild(orientationNode);

    // generate map model
    mapNode = createMap();
    rollingMap->addChild(mapNode);

    // generate waypoint model
    waypointGroupNode = new WaypointGroupNode;
    waypointGroupNode->init();
    rollingMap->addChild(waypointGroupNode);

    // generate target model
    targetNode = createTarget();
    rollingMap->addChild(targetNode);

    // generate RGBD model
    rgbd3DNode = createRGBD3D();
    rollingMap->addChild(rgbd3DNode);

#if defined(QGC_PROTOBUF_ENABLED) && defined(QGC_USE_PIXHAWK_MESSAGES)
    obstacleGroupNode = new ObstacleGroupNode;
    obstacleGroupNode->init();
    rollingMap->addChild(obstacleGroupNode);

    // generate path model
    pathNode = new osg::Geode;
    pathNode->addDrawable(createTrail(osg::Vec4(1.0f, 0.8f, 0.0f, 1.0f)));
    rollingMap->addChild(pathNode);
#endif

    setupHUD();

    // find available vehicle models in models folder
    vehicleModels = findVehicleModels();

    buildLayout();

    updateHUD(0.0, 0.0, 0.0, 0.0, 0.0, 0.0, "32N");

    connect(UASManager::instance(), SIGNAL(activeUASSet(UASInterface*)),
            this, SLOT(setActiveUAS(UASInterface*)));
}

Pixhawk3DWidget::~Pixhawk3DWidget()
{

}

/**
 *
 * @param uas the UAS/MAV to monitor/display with the HUD
 */
void
Pixhawk3DWidget::setActiveUAS(UASInterface* uas)
{
    if (this->uas == uas)
    {
        return;
    }

    if (this->uas != NULL)
    {
        // Disconnect any previously connected active MAV
        disconnect(this->uas, SIGNAL(localPositionChanged(UASInterface*,int,double,double,double,quint64)), this, SLOT(addToTrails(UASInterface*,int,double,double,double,quint64)));
        disconnect(this->uas, SIGNAL(attitudeChanged(UASInterface*,int,double,double,double,quint64)), this, SLOT(updateAttitude(UASInterface*,int,double,double,double,quint64)));
    }

    connect(uas, SIGNAL(localPositionChanged(UASInterface*,int,double,double,double,quint64)), this, SLOT(addToTrails(UASInterface*,int,double,double,double,quint64)));
    connect(uas, SIGNAL(attitudeChanged(UASInterface*,int,double,double,double,quint64)), this, SLOT(updateAttitude(UASInterface*,int,double,double,double,quint64)));

    trails.clear();
    trailNode->removeDrawables(0, trailNode->getNumDrawables());
    orientationNode->removeChildren(0, orientationNode->getNumChildren());

    this->uas = uas;
}

void
Pixhawk3DWidget::addToTrails(UASInterface* uas, int component, double x, double y, double z, quint64 time)
{
    if (this->uas->getUASID() != uas->getUASID())
    {
        return;
    }

    if (!trails.contains(component))
    {
        trails[component] = QVarLengthArray<osg::Vec3d, 10000>();
        trailDrawableIdxs[component] = trails.size() - 1;

        osg::Vec4 color((float)qrand() / RAND_MAX,
                        (float)qrand() / RAND_MAX,
                        (float)qrand() / RAND_MAX,
                        0.5);
        trailNode->addDrawable(createTrail(color));

        double radius = 0.5;

        osg::ref_ptr<osg::Group> group = new osg::Group;

        // cone indicates waypoint orientation
        osg::ref_ptr<osg::ShapeDrawable> sd = new osg::ShapeDrawable;
        double coneRadius = radius / 2.0;
        osg::ref_ptr<osg::Cone> cone =
            new osg::Cone(osg::Vec3d(0.0, 0.0, 0.0),
                          coneRadius, radius * 2.0);

        sd->setShape(cone);
        sd->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::ON);
        sd->setColor(color);

        osg::ref_ptr<osg::Geode> geode = new osg::Geode;
        geode->addDrawable(sd);

        osg::ref_ptr<osg::PositionAttitudeTransform> pat =
            new osg::PositionAttitudeTransform;
        pat->addChild(geode);
        pat->setAttitude(osg::Quat(- M_PI_2, osg::Vec3d(1.0f, 0.0f, 0.0f),
                                   M_PI_2, osg::Vec3d(0.0f, 1.0f, 0.0f),
                                   0.0, osg::Vec3d(0.0f, 0.0f, 1.0f)));
        group->addChild(pat);

        // cylinder indicates waypoint position
        sd = new osg::ShapeDrawable;
        osg::ref_ptr<osg::Cylinder> cylinder =
            new osg::Cylinder(osg::Vec3d(0.0, 0.0, 0.0),
                              radius, 0);

        sd->setShape(cylinder);
        sd->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::ON);
        sd->setColor(color);

        geode = new osg::Geode;
        geode->addDrawable(sd);
        group->addChild(geode);

        pat = new osg::PositionAttitudeTransform;
        orientationNode->addChild(pat);
        pat->addChild(group);
    }

    QVarLengthArray<osg::Vec3d, 10000>& trail = trails[component];

    bool addToTrail = false;
    if (trail.size() > 0)
    {
        if (fabs(x - trail[trail.size() - 1].x()) > 0.01f ||
                fabs(y - trail[trail.size() - 1].y()) > 0.01f ||
                fabs(z - trail[trail.size() - 1].z()) > 0.01f)
        {
            addToTrail = true;
        }
    }
    else
    {
        addToTrail = true;
    }

    if (addToTrail)
    {
        osg::Vec3d p(x, y, z);
        if (trail.size() == trail.capacity())
        {
            memcpy(trail.data(), trail.data() + 1,
                   (trail.size() - 1) * sizeof(osg::Vec3d));
            trail[trail.size() - 1] = p;
        }
        else
        {
            trail.append(p);
        }
    }
}

void
Pixhawk3DWidget::updateAttitude(UASInterface* uas, int component, double roll, double pitch, double yaw, quint64 time)
{
    if (this->uas->getUASID() != uas->getUASID())
    {
        return;
    }

    if (!trails.contains(component))
    {
        return;
    }

    int idx = trailDrawableIdxs[component];

    osg::PositionAttitudeTransform* pat =
        dynamic_cast<osg::PositionAttitudeTransform*>(orientationNode->getChild(idx));

    pat->setAttitude(osg::Quat(-yaw, osg::Vec3d(0.0f, 0.0f, 1.0f),
                               0.0, osg::Vec3d(1.0f, 0.0f, 0.0f),
                               0.0, osg::Vec3d(0.0f, 1.0f, 0.0f)));
}

void
Pixhawk3DWidget::selectFrame(QString text)
{
    if (text.compare("Global") == 0)
    {
        frame = MAV_FRAME_GLOBAL;
    }
    else if (text.compare("Local") == 0)
    {
        frame = MAV_FRAME_LOCAL_NED;
    }

    getPosition(lastRobotX, lastRobotY, lastRobotZ);

    recenter();
}

void
Pixhawk3DWidget::showLocalGrid(int32_t state)
{
    if (state == Qt::Checked)
    {
        displayLocalGrid = true;
    }
    else
    {
        displayLocalGrid = false;
    }
}

void
Pixhawk3DWidget::showWorldGrid(int32_t state)
{
    if (state == Qt::Checked)
    {
        displayWorldGrid = true;
    }
    else
    {
        displayWorldGrid = false;
    }
}

void
Pixhawk3DWidget::showTrails(int32_t state)
{
    if (state == Qt::Checked)
    {
        if (!displayTrails)
        {
            trails.clear();
        }

        displayTrails = true;
    }
    else
    {
        displayTrails = false;
    }
}

void
Pixhawk3DWidget::showWaypoints(int state)
{
    if (state == Qt::Checked)
    {
        displayWaypoints = true;
    }
    else
    {
        displayWaypoints = false;
    }
}

void
Pixhawk3DWidget::selectMapSource(int index)
{
    mapNode->setImageryType(static_cast<Imagery::ImageryType>(index));

    if (mapNode->getImageryType() == Imagery::BLANK_MAP)
    {
        displayImagery = false;
    }
    else
    {
        displayImagery = true;
    }
}

void
Pixhawk3DWidget::selectVehicleModel(int index)
{
    egocentricMap->removeChild(vehicleModel);
    vehicleModel = vehicleModels.at(index);
    egocentricMap->addChild(vehicleModel);
}

void
Pixhawk3DWidget::recenter(void)
{
    double robotX = 0.0f, robotY = 0.0f, robotZ = 0.0f;
    getPosition(robotX, robotY, robotZ);

    recenterCamera(robotY, robotX, -robotZ);
}

void
Pixhawk3DWidget::toggleFollowCamera(int32_t state)
{
    if (state == Qt::Checked)
    {
        followCamera = true;
    }
    else
    {
        followCamera = false;
    }
}

void
Pixhawk3DWidget::selectTargetHeading(void)
{
    if (!uas)
    {
        return;
    }

    osg::Vec2d p;

    if (frame == MAV_FRAME_GLOBAL)
    {
        double altitude = uas->getAltitude();

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(getMouseX(), getMouseY(), altitude);

        p.set(cursorWorldCoords.first, cursorWorldCoords.second);
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        double z = uas->getLocalZ();

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(getMouseX(), getMouseY(), -z);

        p.set(cursorWorldCoords.first, cursorWorldCoords.second);
    }

    target.setW(atan2(p.y() - target.y(), p.x() - target.x()));
}

void
Pixhawk3DWidget::selectTarget(void)
{
    if (!uas)
    {
        return;
    }
    if (!uas->getParamManager())
    {
        return;
    }

    if (frame == MAV_FRAME_GLOBAL)
    {
        double altitude = uas->getAltitude();

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(cachedMousePos.x(), cachedMousePos.y(),
                                    altitude);

        QVariant zTarget;
        if (!uas->getParamManager()->getParameterValue(MAV_COMP_ID_PATHPLANNER, "TARGET-ALT", zTarget))
        {
            zTarget = -altitude;
        }

        target = QVector4D(cursorWorldCoords.first, cursorWorldCoords.second,
                           zTarget.toReal(), 0.0);
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        double z = uas->getLocalZ();

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(cachedMousePos.x(), cachedMousePos.y(), -z);

        QVariant zTarget;
        if (!uas->getParamManager()->getParameterValue(MAV_COMP_ID_PATHPLANNER, "TARGET-ALT", zTarget))
        {
            zTarget = z;
        }

        target = QVector4D(cursorWorldCoords.first, cursorWorldCoords.second,
                           zTarget.toReal(), 0.0);
    }

    enableTarget = true;

    mode = SELECT_TARGET_HEADING_MODE;
}

void
Pixhawk3DWidget::setTarget(void)
{
    selectTargetHeading();

    uas->setTargetPosition(target.x(), target.y(), target.z(),
                           osg::RadiansToDegrees(target.w()));
}

void
Pixhawk3DWidget::insertWaypoint(void)
{
    if (!uas)
    {
        return;
    }

    Waypoint* wp = NULL;
    if (frame == MAV_FRAME_GLOBAL)
    {
        double latitude = uas->getLatitude();
        double longitude = uas->getLongitude();
        double altitude = uas->getAltitude();
        double x, y;
        QString utmZone;
        Imagery::LLtoUTM(latitude, longitude, x, y, utmZone);

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(cachedMousePos.x(), cachedMousePos.y(),
                                    altitude);

        Imagery::UTMtoLL(cursorWorldCoords.first, cursorWorldCoords.second, utmZone,
                         latitude, longitude);

        wp = new Waypoint(0, longitude, latitude, altitude, 0.0, 0.25);
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        double z = uas->getLocalZ();

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(cachedMousePos.x(), cachedMousePos.y(), -z);

        wp = new Waypoint(0, cursorWorldCoords.first,
                          cursorWorldCoords.second, z, 0.0, 0.25);
    }

    if (wp)
    {
        wp->setFrame(frame);
        uas->getWaypointManager()->addWaypointEditable(wp);
    }

    selectedWpIndex = wp->getId();
    mode = MOVE_WAYPOINT_HEADING_MODE;
}

void
Pixhawk3DWidget::moveWaypointPosition(void)
{
    if (mode != MOVE_WAYPOINT_POSITION_MODE)
    {
        mode = MOVE_WAYPOINT_POSITION_MODE;
        return;
    }

    if (!uas)
    {
        return;
    }

    const QVector<Waypoint *> waypoints =
        uas->getWaypointManager()->getWaypointEditableList();
    Waypoint* waypoint = waypoints.at(selectedWpIndex);

    if (frame == MAV_FRAME_GLOBAL)
    {
        double latitude = uas->getLatitude();
        double longitude = uas->getLongitude();
        double altitude = uas->getAltitude();
        double x, y;
        QString utmZone;
        Imagery::LLtoUTM(latitude, longitude, x, y, utmZone);

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(getMouseX(), getMouseY(), altitude);

        Imagery::UTMtoLL(cursorWorldCoords.first, cursorWorldCoords.second,
                         utmZone, latitude, longitude);

        waypoint->setX(longitude);
        waypoint->setY(latitude);
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        double z = uas->getLocalZ();

        std::pair<double,double> cursorWorldCoords =
            getGlobalCursorPosition(getMouseX(), getMouseY(), -z);

        waypoint->setX(cursorWorldCoords.first);
        waypoint->setY(cursorWorldCoords.second);
    }
}

void
Pixhawk3DWidget::moveWaypointHeading(void)
{
    if (mode != MOVE_WAYPOINT_HEADING_MODE)
    {
        mode = MOVE_WAYPOINT_HEADING_MODE;
        return;
    }

    if (!uas)
    {
        return;
    }

    const QVector<Waypoint *> waypoints =
        uas->getWaypointManager()->getWaypointEditableList();
    Waypoint* waypoint = waypoints.at(selectedWpIndex);

    double x = 0.0, y = 0.0, z = 0.0;

    if (frame == MAV_FRAME_GLOBAL)
    {
        double latitude = waypoint->getY();
        double longitude = waypoint->getX();
        z = -waypoint->getZ();
        QString utmZone;
        Imagery::LLtoUTM(latitude, longitude, x, y, utmZone);
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        z = uas->getLocalZ();
    }

    std::pair<double,double> cursorWorldCoords =
        getGlobalCursorPosition(getMouseX(), getMouseY(), -z);

    double yaw = atan2(cursorWorldCoords.second - waypoint->getY(),
                       cursorWorldCoords.first - waypoint->getX());
    yaw = osg::RadiansToDegrees(yaw);

    waypoint->setYaw(yaw);
}

void
Pixhawk3DWidget::deleteWaypoint(void)
{
    if (uas)
    {
        uas->getWaypointManager()->removeWaypoint(selectedWpIndex);
    }
}

void
Pixhawk3DWidget::setWaypointAltitude(void)
{
    if (!uas)
    {
        return;
    }

    bool ok;
    const QVector<Waypoint *> waypoints =
        uas->getWaypointManager()->getWaypointEditableList();
    Waypoint* waypoint = waypoints.at(selectedWpIndex);

    double altitude = waypoint->getZ();
    if (frame == MAV_FRAME_LOCAL_NED)
    {
        altitude = -altitude;
    }

    double newAltitude =
        QInputDialog::getDouble(this, tr("Set altitude of waypoint %1").arg(selectedWpIndex),
                                tr("Altitude (m):"), waypoint->getZ(), -1000.0, 1000.0, 1, &ok);
    if (ok)
    {
        if (frame == MAV_FRAME_GLOBAL)
        {
            waypoint->setZ(newAltitude);
        }
        else if (frame == MAV_FRAME_LOCAL_NED)
        {
            waypoint->setZ(-newAltitude);
        }
    }
}

void
Pixhawk3DWidget::clearAllWaypoints(void)
{
    if (uas)
    {
        const QVector<Waypoint *> waypoints =
            uas->getWaypointManager()->getWaypointEditableList();
        for (int i = waypoints.size() - 1; i >= 0; --i)
        {
            uas->getWaypointManager()->removeWaypoint(i);
        }
    }
}

QVector< osg::ref_ptr<osg::Node> >
Pixhawk3DWidget::findVehicleModels(void)
{
    QDir directory("models");
    QStringList files = directory.entryList(QStringList("*.osg"), QDir::Files);

    QVector< osg::ref_ptr<osg::Node> > nodes;

    // add Pixhawk Bravo model
    nodes.push_back(PixhawkCheetahGeode::instance());

    // add sphere of 0.05m radius
    osg::ref_ptr<osg::Sphere> sphere = new osg::Sphere(osg::Vec3f(0.0f, 0.0f, 0.0f), 0.05f);
    osg::ref_ptr<osg::ShapeDrawable> sphereDrawable = new osg::ShapeDrawable(sphere);
    sphereDrawable->setColor(osg::Vec4f(0.5f, 0.0f, 0.5f, 1.0f));
    osg::ref_ptr<osg::Geode> sphereGeode = new osg::Geode;
    sphereGeode->addDrawable(sphereDrawable);
    sphereGeode->setName("Sphere (0.1m)");
    nodes.push_back(sphereGeode);

    // add all other models in folder
    for (int i = 0; i < files.size(); ++i)
    {
        osg::ref_ptr<osg::Node> node =
            osgDB::readNodeFile(directory.absoluteFilePath(files[i]).toStdString().c_str());

        if (node)
        {
            nodes.push_back(node);
        }
        else
        {
            printf("%s\n", QString("ERROR: Could not load file " + directory.absoluteFilePath(files[i]) + "\n").toStdString().c_str());
        }
    }

//    QStringList dirs = directory.entryList(QDir::Dirs);
//    // Add models in subfolders
//    for (int i = 0; i < dirs.size(); ++i)
//    {
//        // Handling the current directory
//        QStringList currFiles = QDir(dirs[i]).entryList(QStringList("*.ac"), QDir::Files);

//        // Load the file
//        osg::ref_ptr<osg::Node> node =
//                osgDB::readNodeFile(directory.absoluteFilePath(currFiles.first()).toStdString().c_str());

//        if (node)
//        {

//        nodes.push_back(node);
//        }
//        else
//        {
//            printf(QString("ERROR: Could not load file " + directory.absoluteFilePath(files[i]) + "\n").toStdString().c_str());
//        }
//    }

    return nodes;
}

void
Pixhawk3DWidget::buildLayout(void)
{
    QComboBox* frameComboBox = new QComboBox(this);
    frameComboBox->addItem("Local");
    frameComboBox->addItem("Global");
    frameComboBox->setFixedWidth(70);

    QCheckBox* localGridCheckBox = new QCheckBox(this);
    localGridCheckBox->setText("Local Grid");
    localGridCheckBox->setChecked(displayLocalGrid);

    QCheckBox* worldGridCheckBox = new QCheckBox(this);
    worldGridCheckBox->setText("World Grid");
    worldGridCheckBox->setChecked(displayWorldGrid);

    QCheckBox* trailCheckBox = new QCheckBox(this);
    trailCheckBox->setText("Trails");
    trailCheckBox->setChecked(displayTrails);

    QCheckBox* waypointsCheckBox = new QCheckBox(this);
    waypointsCheckBox->setText("Waypoints");
    waypointsCheckBox->setChecked(displayWaypoints);

    QLabel* mapLabel = new QLabel("Map", this);
    QComboBox* mapComboBox = new QComboBox(this);
    mapComboBox->addItem("None");
    mapComboBox->addItem("Map (Google)");
    mapComboBox->addItem("Satellite (Google)");

    QLabel* modelLabel = new QLabel("Vehicle", this);
    QComboBox* modelComboBox = new QComboBox(this);
    for (int i = 0; i < vehicleModels.size(); ++i)
    {
        modelComboBox->addItem(vehicleModels[i]->getName().c_str());
    }

    QPushButton* recenterButton = new QPushButton(this);
    recenterButton->setText("Recenter Camera");

    QCheckBox* followCameraCheckBox = new QCheckBox(this);
    followCameraCheckBox->setText("Follow Camera");
    followCameraCheckBox->setChecked(followCamera);

    QGridLayout* layout = new QGridLayout(this);
    layout->setMargin(0);
    layout->setSpacing(2);
    layout->addWidget(frameComboBox, 0, 10);
    layout->addWidget(localGridCheckBox, 2, 0);
    layout->addWidget(worldGridCheckBox, 2, 1);
    layout->addWidget(trailCheckBox, 2, 2);
    layout->addWidget(waypointsCheckBox, 2, 3);
    layout->addItem(new QSpacerItem(10, 0, QSizePolicy::Expanding, QSizePolicy::Expanding), 2, 4);
    layout->addWidget(mapLabel, 2, 5);
    layout->addWidget(mapComboBox, 2, 6);
    layout->addWidget(modelLabel, 2, 7);
    layout->addWidget(modelComboBox, 2, 8);
    layout->addItem(new QSpacerItem(10, 0, QSizePolicy::Expanding, QSizePolicy::Expanding), 2, 9);
    layout->addWidget(recenterButton, 2, 10);
    layout->addWidget(followCameraCheckBox, 2, 11);
    layout->setRowStretch(0, 1);
    layout->setRowStretch(1, 100);
    layout->setRowStretch(2, 1);
    setLayout(layout);

    connect(frameComboBox, SIGNAL(currentIndexChanged(QString)),
            this, SLOT(selectFrame(QString)));
    connect(localGridCheckBox, SIGNAL(stateChanged(int)),
            this, SLOT(showLocalGrid(int)));
    connect(worldGridCheckBox, SIGNAL(stateChanged(int)),
            this, SLOT(showWorldGrid(int)));
    connect(trailCheckBox, SIGNAL(stateChanged(int)),
            this, SLOT(showTrails(int)));
    connect(waypointsCheckBox, SIGNAL(stateChanged(int)),
            this, SLOT(showWaypoints(int)));
    connect(mapComboBox, SIGNAL(currentIndexChanged(int)),
            this, SLOT(selectMapSource(int)));
    connect(modelComboBox, SIGNAL(currentIndexChanged(int)),
            this, SLOT(selectVehicleModel(int)));
    connect(recenterButton, SIGNAL(clicked()), this, SLOT(recenter()));
    connect(followCameraCheckBox, SIGNAL(stateChanged(int)),
            this, SLOT(toggleFollowCamera(int)));
}

void
Pixhawk3DWidget::resizeGL(int width, int height)
{
    Q3DWidget::resizeGL(width, height);

    resizeHUD();
}

void
Pixhawk3DWidget::display(void)
{
    // set node visibility
    allocentricMap->setChildValue(worldGridNode, displayWorldGrid);
    rollingMap->setChildValue(localGridNode, displayLocalGrid);
    rollingMap->setChildValue(trailNode, displayTrails);
    rollingMap->setChildValue(orientationNode, displayTrails);
    rollingMap->setChildValue(mapNode, displayImagery);
    rollingMap->setChildValue(waypointGroupNode, displayWaypoints);
    rollingMap->setChildValue(targetNode, enableTarget);
#if defined(QGC_PROTOBUF_ENABLED) && defined(QGC_USE_PIXHAWK_MESSAGES)
    rollingMap->setChildValue(obstacleGroupNode, displayObstacleList);
    rollingMap->setChildValue(pathNode, displayPath);
#endif
    rollingMap->setChildValue(rgbd3DNode, displayRGBD3D);
    hudGroup->setChildValue(rgb2DGeode, displayRGBD2D);
    hudGroup->setChildValue(depth2DGeode, displayRGBD2D);

    if (!uas)
    {
        return;
    }

    double robotX, robotY, robotZ, robotRoll, robotPitch, robotYaw;
    QString utmZone;
    getPose(robotX, robotY, robotZ, robotRoll, robotPitch, robotYaw, utmZone);

    if (lastRobotX == 0.0f && lastRobotY == 0.0f && lastRobotZ == 0.0f)
    {
        lastRobotX = robotX;
        lastRobotY = robotY;
        lastRobotZ = robotZ;

        recenterCamera(robotY, robotX, -robotZ);
    }

    if (followCamera)
    {
        double dx = robotY - lastRobotY;
        double dy = robotX - lastRobotX;
        double dz = lastRobotZ - robotZ;

        moveCamera(dx, dy, dz);
    }

    robotPosition->setPosition(osg::Vec3d(robotY, robotX, -robotZ));
    robotAttitude->setAttitude(osg::Quat(-robotYaw, osg::Vec3d(0.0f, 0.0f, 1.0f),
                                         robotPitch, osg::Vec3d(1.0f, 0.0f, 0.0f),
                                         robotRoll, osg::Vec3d(0.0f, 1.0f, 0.0f)));

    if (displayTrails)
    {
        updateTrails(robotX, robotY, robotZ);
    }

    if (frame == MAV_FRAME_GLOBAL && displayImagery)
    {
        updateImagery(robotX, robotY, robotZ, utmZone);
    }

    if (displayWaypoints)
    {
        updateWaypoints();
    }

    if (enableTarget)
    {
        updateTarget(robotX, robotY, robotZ);
    }

#if defined(QGC_PROTOBUF_ENABLED) && defined(QGC_USE_PIXHAWK_MESSAGES)
    if (displayRGBD2D || displayRGBD3D)
    {
        updateRGBD(robotX, robotY, robotZ);
    }

    if (displayObstacleList)
    {
        updateObstacles(robotX, robotY, robotZ);
    }

    if (displayPath)
    {
        updatePath(robotX, robotY, robotZ);
    }
#endif

    updateHUD(robotX, robotY, robotZ, robotRoll, robotPitch, robotYaw, utmZone);

    lastRobotX = robotX;
    lastRobotY = robotY;
    lastRobotZ = robotZ;

    layout()->update();
}

void
Pixhawk3DWidget::keyPressEvent(QKeyEvent* event)
{
    if (!event->text().isEmpty())
    {
        switch (*(event->text().toAscii().data()))
        {
        case '1':
            displayRGBD2D = !displayRGBD2D;
            break;
        case '2':
            displayRGBD3D = !displayRGBD3D;
            break;
        case 'c':
        case 'C':
            enableRGBDColor = !enableRGBDColor;
            break;
        case 'o':
        case 'O':
            displayObstacleList = !displayObstacleList;
            break;
        case 'p':
        case 'P':
            displayPath = !displayPath;
            break;
        }
    }

    Q3DWidget::keyPressEvent(event);
}

void
Pixhawk3DWidget::mousePressEvent(QMouseEvent* event)
{
    if (event->button() == Qt::LeftButton)
    {
        if (mode == SELECT_TARGET_HEADING_MODE)
        {
            setTarget();
        }

        if (mode != DEFAULT_MODE)
        {
            mode = DEFAULT_MODE;
        }

        if (event->modifiers() == Qt::ShiftModifier)
        {
            selectedWpIndex = findWaypoint(event->pos());
            if (selectedWpIndex == -1)
            {
                cachedMousePos = event->pos();

                showInsertWaypointMenu(event->globalPos());
            }
            else
            {
                showEditWaypointMenu(event->globalPos());
            }

            return;
        }
    }

    Q3DWidget::mousePressEvent(event);
}

void
Pixhawk3DWidget::showEvent(QShowEvent* event)
{
    Q3DWidget::showEvent(event);
    emit visibilityChanged(true);
}

void
Pixhawk3DWidget::hideEvent(QHideEvent* event)
{
    Q3DWidget::hideEvent(event);
    emit visibilityChanged(false);
}

void
Pixhawk3DWidget::mouseMoveEvent(QMouseEvent* event)
{
    if (mode == SELECT_TARGET_HEADING_MODE)
    {
        selectTargetHeading();
    }
    if (mode == MOVE_WAYPOINT_POSITION_MODE)
    {
        moveWaypointPosition();
    }
    if (mode == MOVE_WAYPOINT_HEADING_MODE)
    {
        moveWaypointHeading();
    }

    Q3DWidget::mouseMoveEvent(event);
}

void
Pixhawk3DWidget::getPose(double& x, double& y, double& z,
                         double& roll, double& pitch, double& yaw,
                         QString& utmZone)
{
    if (!uas)
    {
        return;
    }

    if (frame == MAV_FRAME_GLOBAL)
    {
        double latitude = uas->getLatitude();
        double longitude = uas->getLongitude();
        double altitude = uas->getAltitude();

        Imagery::LLtoUTM(latitude, longitude, x, y, utmZone);
        z = -altitude;
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        x = uas->getLocalX();
        y = uas->getLocalY();
        z = uas->getLocalZ();
    }

    roll = uas->getRoll();
    pitch = uas->getPitch();
    yaw = uas->getYaw();
}

void
Pixhawk3DWidget::getPose(double& x, double& y, double& z,
                         double& roll, double& pitch, double& yaw)
{
    QString utmZone;
    getPose(x, y, z, roll, pitch, yaw);
}

void
Pixhawk3DWidget::getPosition(double& x, double& y, double& z,
                             QString& utmZone)
{
    if (!uas)
    {
        return;
    }

    if (frame == MAV_FRAME_GLOBAL)
    {
        double latitude = uas->getLatitude();
        double longitude = uas->getLongitude();
        double altitude = uas->getAltitude();

        Imagery::LLtoUTM(latitude, longitude, x, y, utmZone);
        z = -altitude;
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        x = uas->getLocalX();
        y = uas->getLocalY();
        z = uas->getLocalZ();
    }
}

void
Pixhawk3DWidget::getPosition(double& x, double& y, double& z)
{
    QString utmZone;
    getPosition(x, y, z, utmZone);
}

osg::ref_ptr<osg::Geode>
Pixhawk3DWidget::createLocalGrid(void)
{
    osg::ref_ptr<osg::Geode> geode(new osg::Geode());
    osg::ref_ptr<osg::Geometry> fineGeometry(new osg::Geometry());
    osg::ref_ptr<osg::Geometry> coarseGeometry(new osg::Geometry());
    geode->addDrawable(fineGeometry);
    geode->addDrawable(coarseGeometry);

    float radius = 5.0f;
    float resolution = 0.25f;

    osg::ref_ptr<osg::Vec3Array> fineCoords(new osg::Vec3Array);
    osg::ref_ptr<osg::Vec3Array> coarseCoords(new osg::Vec3Array);

    // draw a 10m x 10m grid with 0.25m resolution
    for (float i = -radius; i <= radius; i += resolution)
    {
        if (fabs(i / 1.0f - floor(i / 1.0f)) < 0.01f)
        {
            coarseCoords->push_back(osg::Vec3(i, -radius, 0.0f));
            coarseCoords->push_back(osg::Vec3(i, radius, 0.0f));
            coarseCoords->push_back(osg::Vec3(-radius, i, 0.0f));
            coarseCoords->push_back(osg::Vec3(radius, i, 0.0f));
        }
        else
        {
            fineCoords->push_back(osg::Vec3(i, -radius, 0.0f));
            fineCoords->push_back(osg::Vec3(i, radius, 0.0f));
            fineCoords->push_back(osg::Vec3(-radius, i, 0.0f));
            fineCoords->push_back(osg::Vec3(radius, i, 0.0f));
        }
    }

    fineGeometry->setVertexArray(fineCoords);
    coarseGeometry->setVertexArray(coarseCoords);

    osg::ref_ptr<osg::Vec4Array> color(new osg::Vec4Array);
    color->push_back(osg::Vec4(0.5f, 0.5f, 0.5f, 1.0f));
    fineGeometry->setColorArray(color);
    coarseGeometry->setColorArray(color);
    fineGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);
    coarseGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);

    fineGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,
                                  0, fineCoords->size()));
    coarseGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES, 0,
                                    coarseCoords->size()));

    osg::ref_ptr<osg::StateSet> fineStateset(new osg::StateSet);
    osg::ref_ptr<osg::LineWidth> fineLinewidth(new osg::LineWidth());
    fineLinewidth->setWidth(0.25f);
    fineStateset->setAttributeAndModes(fineLinewidth, osg::StateAttribute::ON);
    fineStateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    fineStateset->setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON);
    fineStateset->setMode(GL_BLEND, osg::StateAttribute::ON);
    fineGeometry->setStateSet(fineStateset);

    osg::ref_ptr<osg::StateSet> coarseStateset(new osg::StateSet);
    osg::ref_ptr<osg::LineWidth> coarseLinewidth(new osg::LineWidth());
    coarseLinewidth->setWidth(1.0f);
    coarseStateset->setAttributeAndModes(coarseLinewidth, osg::StateAttribute::ON);
    coarseStateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    coarseStateset->setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON);
    coarseStateset->setMode(GL_BLEND, osg::StateAttribute::ON);
    coarseGeometry->setStateSet(coarseStateset);

    return geode;
}

osg::ref_ptr<osg::Geode>
Pixhawk3DWidget::createWorldGrid(void)
{
    osg::ref_ptr<osg::Geode> geode(new osg::Geode());
    osg::ref_ptr<osg::Geometry> fineGeometry(new osg::Geometry());
    osg::ref_ptr<osg::Geometry> coarseGeometry(new osg::Geometry());
    osg::ref_ptr<osg::Geometry> axisGeometry(new osg::Geometry());
    geode->addDrawable(fineGeometry);
    geode->addDrawable(coarseGeometry);
    geode->addDrawable(axisGeometry.get());

    float radius = 20.0f;
    float resolution = 1.0f;

    osg::ref_ptr<osg::Vec3Array> fineCoords(new osg::Vec3Array);
    osg::ref_ptr<osg::Vec3Array> coarseCoords(new osg::Vec3Array);

    // draw a 40m x 40m grid with 1.0m resolution
    for (float i = -radius; i <= radius; i += resolution)
    {
        if (fabs(i / 5.0f - floor(i / 5.0f)) < 0.01f)
        {
            coarseCoords->push_back(osg::Vec3(i, -radius, 0.0f));
            coarseCoords->push_back(osg::Vec3(i, radius, 0.0f));
            coarseCoords->push_back(osg::Vec3(-radius, i, 0.0f));
            coarseCoords->push_back(osg::Vec3(radius, i, 0.0f));
        }
        else
        {
            fineCoords->push_back(osg::Vec3(i, -radius, 0.0f));
            fineCoords->push_back(osg::Vec3(i, radius, 0.0f));
            fineCoords->push_back(osg::Vec3(-radius, i, 0.0f));
            fineCoords->push_back(osg::Vec3(radius, i, 0.0f));
        }
    }

    fineGeometry->setVertexArray(fineCoords);
    coarseGeometry->setVertexArray(coarseCoords);

    osg::ref_ptr<osg::Vec4Array> color(new osg::Vec4Array);
    color->push_back(osg::Vec4(0.5f, 0.5f, 0.5f, 1.0f));
    fineGeometry->setColorArray(color);
    coarseGeometry->setColorArray(color);
    fineGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);
    coarseGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);

    fineGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,
                                  0, fineCoords->size()));
    coarseGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES, 0,
                                    coarseCoords->size()));

    osg::ref_ptr<osg::StateSet> fineStateset(new osg::StateSet);
    osg::ref_ptr<osg::LineWidth> fineLinewidth(new osg::LineWidth());
    fineLinewidth->setWidth(0.1f);
    fineStateset->setAttributeAndModes(fineLinewidth, osg::StateAttribute::ON);
    fineStateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    fineStateset->setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON);
    fineStateset->setMode(GL_BLEND, osg::StateAttribute::ON);
    fineGeometry->setStateSet(fineStateset);

    osg::ref_ptr<osg::StateSet> coarseStateset(new osg::StateSet);
    osg::ref_ptr<osg::LineWidth> coarseLinewidth(new osg::LineWidth());
    coarseLinewidth->setWidth(2.0f);
    coarseStateset->setAttributeAndModes(coarseLinewidth, osg::StateAttribute::ON);
    coarseStateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    coarseStateset->setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON);
    coarseStateset->setMode(GL_BLEND, osg::StateAttribute::ON);
    coarseGeometry->setStateSet(coarseStateset);

    // add axes
    osg::ref_ptr<osg::Vec3Array> coords(new osg::Vec3Array(6));
    (*coords)[0] = (*coords)[2] = (*coords)[4] =
                                      osg::Vec3(0.0f, 0.0f, 0.0f);
    (*coords)[1] = osg::Vec3(0.0f, 1.0f, 0.0f);
    (*coords)[3] = osg::Vec3(1.0f, 0.0f, 0.0f);
    (*coords)[5] = osg::Vec3(0.0f, 0.0f, -1.0f);

    axisGeometry->setVertexArray(coords);

    osg::Vec4 redColor(1.0f, 0.0f, 0.0f, 0.0f);
    osg::Vec4 greenColor(0.0f, 1.0f, 0.0f, 0.0f);
    osg::Vec4 blueColor(0.0f, 0.0f, 1.0f, 0.0f);

    osg::ref_ptr<osg::Vec4Array> axisColors(new osg::Vec4Array(6));
    (*axisColors)[0] = redColor;
    (*axisColors)[1] = redColor;
    (*axisColors)[2] = greenColor;
    (*axisColors)[3] = greenColor;
    (*axisColors)[4] = blueColor;
    (*axisColors)[5] = blueColor;

    axisGeometry->setColorArray(axisColors);
    axisGeometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);

    axisGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES, 0, 6));

    osg::ref_ptr<osg::StateSet> axisStateset(new osg::StateSet);
    osg::ref_ptr<osg::LineWidth> axisLinewidth(new osg::LineWidth());
    axisLinewidth->setWidth(4.0f);
    axisStateset->setAttributeAndModes(axisLinewidth, osg::StateAttribute::ON);
    axisStateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    axisGeometry->setStateSet(axisStateset);

    return geode;
}

osg::ref_ptr<osg::Geometry>
Pixhawk3DWidget::createTrail(const osg::Vec4& color)
{
    osg::ref_ptr<osg::Geometry> geometry(new osg::Geometry());
    geometry->setUseDisplayList(false);

    osg::ref_ptr<osg::Vec3dArray> vertices(new osg::Vec3dArray());
    geometry->setVertexArray(vertices);

    osg::ref_ptr<osg::DrawArrays> drawArrays(new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP));
    geometry->addPrimitiveSet(drawArrays);

    osg::ref_ptr<osg::Vec4Array> colorArray(new osg::Vec4Array);
    colorArray->push_back(color);
    geometry->setColorArray(colorArray);
    geometry->setColorBinding(osg::Geometry::BIND_OVERALL);

    osg::ref_ptr<osg::StateSet> stateset(new osg::StateSet);
    osg::ref_ptr<osg::LineWidth> linewidth(new osg::LineWidth());
    linewidth->setWidth(1.0f);
    stateset->setAttributeAndModes(linewidth, osg::StateAttribute::ON);
    stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    geometry->setStateSet(stateset);

    return geometry;
}

osg::ref_ptr<Imagery>
Pixhawk3DWidget::createMap(void)
{
    return osg::ref_ptr<Imagery>(new Imagery());
}

osg::ref_ptr<osg::Geode>
Pixhawk3DWidget::createRGBD3D(void)
{
    int frameSize = 752 * 480;

    osg::ref_ptr<osg::Geode> geode(new osg::Geode);
    osg::ref_ptr<osg::Geometry> geometry(new osg::Geometry);

    osg::ref_ptr<osg::Vec3Array> vertices(new osg::Vec3Array(frameSize));
    geometry->setVertexArray(vertices);

    osg::ref_ptr<osg::Vec4Array> colors(new osg::Vec4Array(frameSize));
    geometry->setColorArray(colors);
    geometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
    geometry->setUseDisplayList(false);

    geode->addDrawable(geometry);

    return geode;
}

osg::ref_ptr<osg::Node>
Pixhawk3DWidget::createTarget(void)
{
    osg::ref_ptr<osg::PositionAttitudeTransform> pat =
        new osg::PositionAttitudeTransform;

    pat->setPosition(osg::Vec3d(0.0, 0.0, 0.0));

    osg::ref_ptr<osg::Cone> cone = new osg::Cone(osg::Vec3f(0.0f, 0.0f, 0.0f), 0.2f, 0.6f);
    osg::ref_ptr<osg::ShapeDrawable> coneDrawable = new osg::ShapeDrawable(cone);
    coneDrawable->setColor(osg::Vec4f(0.0f, 1.0f, 0.0f, 1.0f));
    coneDrawable->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::ON);
    osg::ref_ptr<osg::Geode> coneGeode = new osg::Geode;
    coneGeode->addDrawable(coneDrawable);
    coneGeode->setName("Target");

    pat->addChild(coneGeode);

    return pat;
}

void
Pixhawk3DWidget::setupHUD(void)
{
    osg::ref_ptr<osg::Vec4Array> hudColors(new osg::Vec4Array);
    hudColors->push_back(osg::Vec4(0.0f, 0.0f, 0.0f, 0.5f));
    hudColors->push_back(osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f));

    hudBackgroundGeometry = new osg::Geometry;
    hudBackgroundGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POLYGON,
                                           0, 4));
    hudBackgroundGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POLYGON,
                                           4, 4));
    hudBackgroundGeometry->setColorArray(hudColors);
    hudBackgroundGeometry->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
    hudBackgroundGeometry->setUseDisplayList(false);

    statusText = new osgText::Text;
    statusText->setCharacterSize(11);
    statusText->setFont(font);
    statusText->setAxisAlignment(osgText::Text::SCREEN);
    statusText->setColor(osg::Vec4(255, 255, 255, 1));

    osg::ref_ptr<osg::Geode> statusGeode = new osg::Geode;
    statusGeode->addDrawable(hudBackgroundGeometry);
    statusGeode->addDrawable(statusText);
    hudGroup->addChild(statusGeode);

    rgbImage = new osg::Image;
    rgb2DGeode = new ImageWindowGeode;
    rgb2DGeode->init("RGB Image", osg::Vec4(0.0f, 0.0f, 0.1f, 1.0f),
                     rgbImage, font);
    hudGroup->addChild(rgb2DGeode);

    depthImage = new osg::Image;
    depth2DGeode = new ImageWindowGeode;
    depth2DGeode->init("Depth Image", osg::Vec4(0.0f, 0.0f, 0.1f, 1.0f),
                       depthImage, font);
    hudGroup->addChild(depth2DGeode);

    scaleGeode = new HUDScaleGeode;
    scaleGeode->init(font);
    hudGroup->addChild(scaleGeode);
}

void
Pixhawk3DWidget::resizeHUD(void)
{
    int topHUDHeight = 25;
    int bottomHUDHeight = 25;

    osg::Vec3Array* vertices = static_cast<osg::Vec3Array*>(hudBackgroundGeometry->getVertexArray());
    if (vertices == NULL || vertices->size() != 8)
    {
        osg::ref_ptr<osg::Vec3Array> newVertices = new osg::Vec3Array(8);
        hudBackgroundGeometry->setVertexArray(newVertices);

        vertices = static_cast<osg::Vec3Array*>(hudBackgroundGeometry->getVertexArray());
    }

    (*vertices)[0] = osg::Vec3(0, height(), -1);
    (*vertices)[1] = osg::Vec3(width(), height(), -1);
    (*vertices)[2] = osg::Vec3(width(), height() - topHUDHeight, -1);
    (*vertices)[3] = osg::Vec3(0, height() - topHUDHeight, -1);
    (*vertices)[4] = osg::Vec3(0, 0, -1);
    (*vertices)[5] = osg::Vec3(width(), 0, -1);
    (*vertices)[6] = osg::Vec3(width(), bottomHUDHeight, -1);
    (*vertices)[7] = osg::Vec3(0, bottomHUDHeight, -1);

    statusText->setPosition(osg::Vec3(10, height() - 15, -1.5));

    if (rgb2DGeode.valid() && depth2DGeode.valid())
    {
        int windowWidth = (width() - 20) / 2;
        int windowHeight = 3 * windowWidth / 4;
        rgb2DGeode->setAttributes(10, (height() - windowHeight) / 2,
                                  windowWidth, windowHeight);
        depth2DGeode->setAttributes(width() / 2, (height() - windowHeight) / 2,
                                    windowWidth, windowHeight);
    }
}

void
Pixhawk3DWidget::updateHUD(double robotX, double robotY, double robotZ,
                           double robotRoll, double robotPitch, double robotYaw,
                           const QString& utmZone)
{
    std::pair<double,double> cursorPosition =
        getGlobalCursorPosition(getMouseX(), getMouseY(), -robotZ);

    std::ostringstream oss;
    oss.setf(std::ios::fixed, std::ios::floatfield);
    oss.precision(2);
    if (frame == MAV_FRAME_GLOBAL)
    {
        double latitude, longitude;
        Imagery::UTMtoLL(robotX, robotY, utmZone, latitude, longitude);

        double cursorLatitude, cursorLongitude;
        Imagery::UTMtoLL(cursorPosition.first, cursorPosition.second,
                         utmZone, cursorLatitude, cursorLongitude);

        oss.precision(6);
        oss << " Lat = " << latitude <<
            " Lon = " << longitude;

        oss.precision(2);
        oss << " Altitude = " << -robotZ <<
            " r = " << robotRoll <<
            " p = " << robotPitch <<
            " y = " << robotYaw;

        oss.precision(6);
        oss << " Cursor [" << cursorLatitude <<
            " " << cursorLongitude << "]";
    }
    else if (frame == MAV_FRAME_LOCAL_NED)
    {
        oss << " x = " << robotX <<
            " y = " << robotY <<
            " z = " << robotZ <<
            " r = " << robotRoll <<
            " p = " << robotPitch <<
            " y = " << robotYaw <<
            " Cursor [" << cursorPosition.first <<
            " " << cursorPosition.second << "]";
    }

    statusText->setText(oss.str());

    bool darkBackground = true;
    if (mapNode->getImageryType() == Imagery::GOOGLE_MAP)
    {
        darkBackground = false;
    }

    scaleGeode->update(height(), cameraParams.cameraFov,
                       cameraManipulator->getDistance(), darkBackground);
}

void
Pixhawk3DWidget::updateTrails(double robotX, double robotY, double robotZ)
{
    QMapIterator<int,int> it(trailDrawableIdxs);

    while (it.hasNext())
    {
        it.next();

        osg::Geometry* geometry = trailNode->getDrawable(it.value())->asGeometry();
        osg::DrawArrays* drawArrays = reinterpret_cast<osg::DrawArrays*>(geometry->getPrimitiveSet(0));

        osg::ref_ptr<osg::Vec3Array> vertices(new osg::Vec3Array);

        const QVarLengthArray<osg::Vec3d, 10000>& trail = trails.value(it.key());

        for (int i = 0; i < trail.size(); ++i)
        {
            vertices->push_back(osg::Vec3d(trail[i].y() - robotY,
                                           trail[i].x() - robotX,
                                           -(trail[i].z() - robotZ)));
        }

        geometry->setVertexArray(vertices);
        drawArrays->setFirst(0);
        drawArrays->setCount(vertices->size());
        geometry->dirtyBound();

        osg::PositionAttitudeTransform* pat =
            dynamic_cast<osg::PositionAttitudeTransform*>(orientationNode->getChild(it.value()));
        pat->setPosition(osg::Vec3(trail[trail.size() - 1].y() - robotY,
                                   trail[trail.size() - 1].x() - robotX,
                                   -(trail[trail.size() - 1].z() - robotZ)));
    }
}

void
Pixhawk3DWidget::updateImagery(double originX, double originY, double originZ,
                               const QString& zone)
{
    if (mapNode->getImageryType() == Imagery::BLANK_MAP)
    {
        return;
    }

    double viewingRadius = cameraManipulator->getDistance() * 10.0;
    if (viewingRadius < 100.0)
    {
        viewingRadius = 100.0;
    }

    double minResolution = 0.25;
    double centerResolution = cameraManipulator->getDistance() / 50.0;
    double maxResolution = 1048576.0;

    Imagery::ImageryType imageryType = mapNode->getImageryType();
    switch (imageryType)
    {
    case Imagery::GOOGLE_MAP:
        minResolution = 0.25;
        break;
    case Imagery::GOOGLE_SATELLITE:
        minResolution = 0.5;
        break;
    case Imagery::SWISSTOPO_SATELLITE:
        minResolution = 0.25;
        maxResolution = 0.25;
        break;
    default:
        {}
    }

    double resolution = minResolution;
    while (resolution * 2.0 < centerResolution)
    {
        resolution *= 2.0;
    }

    if (resolution > maxResolution)
    {
        resolution = maxResolution;
    }

    mapNode->draw3D(viewingRadius,
                    resolution,
                    cameraManipulator->getCenter().y(),
                    cameraManipulator->getCenter().x(),
                    originX,
                    originY,
                    originZ,
                    zone);

    // prefetch map tiles
    if (resolution / 2.0 >= minResolution)
    {
        mapNode->prefetch3D(viewingRadius / 2.0,
                            resolution / 2.0,
                            cameraManipulator->getCenter().y(),
                            cameraManipulator->getCenter().x(),
                            zone);
    }
    if (resolution * 2.0 <= maxResolution)
    {
        mapNode->prefetch3D(viewingRadius * 2.0,
                            resolution * 2.0,
                            cameraManipulator->getCenter().y(),
                            cameraManipulator->getCenter().x(),
                            zone);
    }

    mapNode->update();
}

void
Pixhawk3DWidget::updateWaypoints(void)
{
    waypointGroupNode->update(frame, uas);
}

void
Pixhawk3DWidget::updateTarget(double robotX, double robotY, double robotZ)
{
    osg::PositionAttitudeTransform* pat =
        dynamic_cast<osg::PositionAttitudeTransform*>(targetNode.get());

    pat->setPosition(osg::Vec3d(target.y() - robotY,
                                target.x() - robotX,
                                -(target.z() - robotZ)));
    pat->setAttitude(osg::Quat(target.w() - M_PI_2, osg::Vec3d(1.0f, 0.0f, 0.0f),
                               M_PI_2, osg::Vec3d(0.0f, 1.0f, 0.0f),
                               0.0, osg::Vec3d(0.0f, 0.0f, 1.0f)));

    osg::Geode* geode = dynamic_cast<osg::Geode*>(pat->getChild(0));
    osg::ShapeDrawable* sd = dynamic_cast<osg::ShapeDrawable*>(geode->getDrawable(0));

    sd->setColor(osg::Vec4f(1.0f, 0.8f, 0.0f, 1.0f));
}

#if defined(QGC_PROTOBUF_ENABLED) && defined(QGC_USE_PIXHAWK_MESSAGES)
void
Pixhawk3DWidget::updateRGBD(double robotX, double robotY, double robotZ)
{
    qreal receivedRGBDImageTimestamp, receivedPointCloudTimestamp;
    px::RGBDImage rgbdImage = uas->getRGBDImage(receivedRGBDImageTimestamp);
    px::PointCloudXYZRGB pointCloud = uas->getPointCloud(receivedPointCloudTimestamp);

    if (rgbdImage.rows() > 0 && rgbdImage.cols() > 0 &&
        QGC::groundTimeSeconds() - receivedRGBDImageTimestamp < kMessageTimeout)
    {
        rgbImage->setImage(rgbdImage.cols(), rgbdImage.rows(), 1,
                           GL_LUMINANCE, GL_LUMINANCE, GL_UNSIGNED_BYTE,
                           reinterpret_cast<unsigned char *>(&(*(rgbdImage.mutable_imagedata1()))[0]),
                           osg::Image::NO_DELETE);
        rgbImage->dirty();

        QByteArray coloredDepth(rgbdImage.cols() * rgbdImage.rows() * 3, 0);
        for (uint32_t r = 0; r < rgbdImage.rows(); ++r)
        {
            const float* depth = reinterpret_cast<const float*>(rgbdImage.imagedata2().c_str() + r * rgbdImage.step2());
            uint8_t* pixel = reinterpret_cast<uint8_t*>(coloredDepth.data()) + r * rgbdImage.cols() * 3;
            for (uint32_t c = 0; c < rgbdImage.cols(); ++c)
            {
                if (depth[c] != 0)
                {
                    int idx = fminf(depth[c], 7.0f) / 7.0f * 127.0f;
                    idx = 127 - idx;

                    float r, g, b;
                    qgc::colormap("jet", idx, r, g, b);
                    pixel[0] = r * 255.0f;
                    pixel[1] = g * 255.0f;
                    pixel[2] = b * 255.0f;
                }

                pixel += 3;
            }
        }

        depthImage->setImage(rgbdImage.cols(), rgbdImage.rows(), 1,
                             GL_RGB, GL_RGB, GL_UNSIGNED_BYTE,
                             reinterpret_cast<unsigned char *>(coloredDepth.data()),
                             osg::Image::NO_DELETE);
        depthImage->dirty();
    }

    osg::Geometry* geometry = rgbd3DNode->getDrawable(0)->asGeometry();
    osg::Vec3Array* vertices = static_cast<osg::Vec3Array*>(geometry->getVertexArray());
    osg::Vec4Array* colors = static_cast<osg::Vec4Array*>(geometry->getColorArray());

    if (QGC::groundTimeSeconds() - receivedPointCloudTimestamp > kMessageTimeout)
    {
        geometry->removePrimitiveSet(0, geometry->getNumPrimitiveSets());
        return;
    }

    for (int i = 0; i < pointCloud.points_size(); ++i)
    {
        const px::PointCloudXYZRGB_PointXYZRGB& p = pointCloud.points(i);

        double x = p.x() - robotX;
        double y = p.y() - robotY;
        double z = p.z() - robotZ;


        (*vertices)[i].set(y, x, -z);

        if (enableRGBDColor)
        {
            float rgb = p.rgb();

            float b = *(reinterpret_cast<unsigned char*>(&rgb)) / 255.0f;
            float g = *(1 + reinterpret_cast<unsigned char*>(&rgb)) / 255.0f;
            float r = *(2 + reinterpret_cast<unsigned char*>(&rgb)) / 255.0f;

            (*colors)[i].set(r, g, b, 1.0f);
        }
        else
        {
            double dist = sqrt(x * x + y * y + z * z);
            int colorIndex = static_cast<int>(fmin(dist / 7.0 * 127.0, 127.0));

            float r, g, b;
            qgc::colormap("jet", colorIndex, r, g, b);

            (*colors)[i].set(r, g, b, 1.0f);
        }
    }

    if (geometry->getNumPrimitiveSets() == 0)
    {
        geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POINTS,
                                  0, pointCloud.points_size()));
    }
    else
    {
        osg::DrawArrays* drawarrays = static_cast<osg::DrawArrays*>(geometry->getPrimitiveSet(0));
        drawarrays->setCount(pointCloud.points_size());
    }
}

void
Pixhawk3DWidget::updateObstacles(double robotX, double robotY, double robotZ)
{
    if (frame == MAV_FRAME_GLOBAL)
    {
        obstacleGroupNode->clear();
        return;
    }

    qreal receivedTimestamp;
    px::ObstacleList obstacleList = uas->getObstacleList(receivedTimestamp);

    if (QGC::groundTimeSeconds() - receivedTimestamp < kMessageTimeout)
    {
        obstacleGroupNode->update(robotX, robotY, robotZ, obstacleList);
    }
    else
    {
        obstacleGroupNode->clear();
    }
}

void
Pixhawk3DWidget::updatePath(double robotX, double robotY, double robotZ)
{
    qreal receivedTimestamp;
    px::Path path = uas->getPath(receivedTimestamp);

    osg::Geometry* geometry = pathNode->getDrawable(0)->asGeometry();
    osg::DrawArrays* drawArrays = reinterpret_cast<osg::DrawArrays*>(geometry->getPrimitiveSet(0));
    osg::Vec4Array* colorArray = reinterpret_cast<osg::Vec4Array*>(geometry->getColorArray());

    geometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
    osg::ref_ptr<osg::LineWidth> linewidth(new osg::LineWidth());
    linewidth->setWidth(2.0f);
    geometry->getStateSet()->setAttributeAndModes(linewidth, osg::StateAttribute::ON);

    colorArray->clear();

    osg::ref_ptr<osg::Vec3Array> vertices(new osg::Vec3Array);

    if (QGC::groundTimeSeconds() - receivedTimestamp < kMessageTimeout)
    {
        // find path length
        float length = 0.0f;
        for (int i = 0; i < path.waypoints_size() - 1; ++i)
        {
            const px::Waypoint& wp0 = path.waypoints(i);
            const px::Waypoint& wp1 = path.waypoints(i+1);

            length += qgc::hypot3f(wp0.x() - wp1.x(),
                                   wp0.y() - wp1.y(),
                                   wp0.z() - wp1.z());
        }

        // build path
        if (path.waypoints_size() > 0)
        {
            const px::Waypoint& wp0 = path.waypoints(0);

            vertices->push_back(osg::Vec3d(wp0.y() - robotY,
                                           wp0.x() - robotX,
                                           -(wp0.z() - robotZ)));

            float r, g, b;
            qgc::colormap("autumn", 0, r, g, b);
            colorArray->push_back(osg::Vec4d(r, g, b, 1.0f));
        }

        float lengthCurrent = 0.0f;
        for (int i = 0; i < path.waypoints_size() - 1; ++i)
        {
            const px::Waypoint& wp0 = path.waypoints(i);
            const px::Waypoint& wp1 = path.waypoints(i+1);

            lengthCurrent += qgc::hypot3f(wp0.x() - wp1.x(),
                                          wp0.y() - wp1.y(),
                                          wp0.z() - wp1.z());

            vertices->push_back(osg::Vec3d(wp1.y() - robotY,
                                           wp1.x() - robotX,
                                           -(wp1.z() - robotZ)));

            int colorIdx = lengthCurrent / length * 127.0f;

            float r, g, b;
            qgc::colormap("autumn", colorIdx, r, g, b);
            colorArray->push_back(osg::Vec4f(r, g, b, 1.0f));
        }
    }

    geometry->setVertexArray(vertices);
    drawArrays->setFirst(0);
    drawArrays->setCount(vertices->size());
    geometry->dirtyBound();
}

#endif

int
Pixhawk3DWidget::findWaypoint(const QPoint& mousePos)
{
    if (getSceneData())
    {
        osgUtil::LineSegmentIntersector::Intersections intersections;

        if (computeIntersections(mousePos.x(), height() - mousePos.y(),
                                 intersections))
        {
            for (osgUtil::LineSegmentIntersector::Intersections::iterator
                    it = intersections.begin(); it != intersections.end(); it++)
            {
                for (uint i = 0 ; i < it->nodePath.size(); ++i)
                {
                    std::string nodeName = it->nodePath[i]->getName();
                    if (nodeName.substr(0, 2).compare("wp") == 0)
                    {
                        return atoi(nodeName.substr(2).c_str());
                    }
                }
            }
        }
    }

    return -1;
}

bool
Pixhawk3DWidget::findTarget(int mouseX, int mouseY)
{
    if (getSceneData())
    {
        osgUtil::LineSegmentIntersector::Intersections intersections;

        if (computeIntersections(mouseX, height() - mouseY, intersections))
        {
            for (osgUtil::LineSegmentIntersector::Intersections::iterator
                    it = intersections.begin(); it != intersections.end(); it++)
            {
                for (uint i = 0 ; i < it->nodePath.size(); ++i)
                {
                    std::string nodeName = it->nodePath[i]->getName();
                    if (nodeName.compare("Target") == 0)
                    {
                        return true;
                    }
                }
            }
        }
    }

    return false;
}

void
Pixhawk3DWidget::showInsertWaypointMenu(const QPoint &cursorPos)
{
    QMenu menu;
    menu.addAction("Insert new waypoint", this, SLOT(insertWaypoint()));
    menu.addAction("Clear all waypoints", this, SLOT(clearAllWaypoints()));
    menu.addAction("Select target", this, SLOT(selectTarget()));
    menu.exec(cursorPos);
}

void
Pixhawk3DWidget::showEditWaypointMenu(const QPoint &cursorPos)
{
    QMenu menu;

    QString text;
    text = QString("Move waypoint %1").arg(QString::number(selectedWpIndex));
    menu.addAction(text, this, SLOT(moveWaypointPosition()));

    text = QString("Change heading of waypoint %1").arg(QString::number(selectedWpIndex));
    menu.addAction(text, this, SLOT(moveWaypointHeading()));

    text = QString("Change altitude of waypoint %1").arg(QString::number(selectedWpIndex));
    menu.addAction(text, this, SLOT(setWaypointAltitude()));

    text = QString("Delete waypoint %1").arg(QString::number(selectedWpIndex));
    menu.addAction(text, this, SLOT(deleteWaypoint()));

    menu.addAction("Clear all waypoints", this, SLOT(clearAllWaypoints()));
    menu.exec(cursorPos);
}