C++ GeoDataLineString::length方法代码示例

 qreal totalDistance() const
 {
     GeoDataLineString measure;
     GeoDataCoordinates sourcePosition(m_source.longitude(), m_source.latitude());
     GeoDataCoordinates targetPosition(m_target.longitude(), m_target.latitude());
     measure << sourcePosition << targetPosition;
     return measure.length(m_planetRadius);
 }

qreal YoursRunner::distance( const GeoDataDocument* document ) const
{
    QVector<GeoDataFolder*> folders = document->folderList();
    foreach( const GeoDataFolder *folder, folders ) {
        foreach( const GeoDataPlacemark *placemark, folder->placemarkList() ) {
            GeoDataGeometry* geometry = placemark->geometry();
            if ( geometry->geometryId() == GeoDataLineStringId ) {
                GeoDataLineString* lineString = dynamic_cast<GeoDataLineString*>( geometry );
                Q_ASSERT( lineString && "Internal error: geometry ID does not match class type" );
                return lineString->length( EARTH_RADIUS );
            }
        }
    }

GeoDataDocument* MapQuestRunner::parse( const QByteArray &content ) const
{
    QDomDocument xml;
    if ( !xml.setContent( content ) ) {
        mDebug() << "Cannot parse xml file with routing instructions.";
        return 0;
    }

    // mDebug() << xml.toString(2);
    QDomElement root = xml.documentElement();

    GeoDataDocument* result = new GeoDataDocument();
    result->setName( "MapQuest" );
    GeoDataPlacemark* routePlacemark = new GeoDataPlacemark;
    routePlacemark->setName( "Route" );

    GeoDataLineString* routeWaypoints = new GeoDataLineString;
    QDomNodeList shapePoints = root.elementsByTagName( "shapePoints" );
    if ( shapePoints.size() == 1 ) {
        QDomNodeList geometry = shapePoints.at( 0 ).toElement().elementsByTagName( "latLng" );
        for ( int i=0; i<geometry.size(); ++i ) {
            double const lat = geometry.item( i ).namedItem( "lat" ).toElement().text().toDouble();
            double const lon = geometry.item( i ).namedItem( "lng" ).toElement().text().toDouble();
            GeoDataCoordinates const position( lon, lat, 0.0, GeoDataCoordinates::Degree );
            routeWaypoints->append( position );
        }
    }
    routePlacemark->setGeometry( routeWaypoints );

    QTime time;
    time = time.addSecs( root.elementsByTagName( "time" ).at( 0 ).toElement().text().toInt() );
    qreal length = routeWaypoints->length( EARTH_RADIUS );
    const QString name = nameString( "MQ", length, time );
    const GeoDataExtendedData data = routeData( length, time );
    routePlacemark->setExtendedData( data );
    result->setName( name );
    result->append( routePlacemark );

    QMap<int,int> mapping;
    QDomNodeList maneuvers = root.elementsByTagName( "maneuverIndexes" );
    if ( maneuvers.size() == 1 ) {
        maneuvers = maneuvers.at( 0 ).childNodes();
        for ( int i=0; i<maneuvers.size(); ++i ) {
            mapping[i] = maneuvers.at( i ).toElement().text().toInt();
            if ( mapping[i] == routeWaypoints->size() ) {
                --mapping[i];
            }
        }
    }

    QDomNodeList instructions = root.elementsByTagName( "maneuver" );
    unsigned int const lastInstruction = qMax<int>( 0, instructions.length()-1 ); // ignore the last 'Welcome to xy' instruction
    for ( unsigned int i = 0; i < lastInstruction; ++i ) {
        QDomElement node = instructions.item( i ).toElement();

        QDomNodeList maneuver = node.elementsByTagName( "turnType" );
        QDomNodeList textNodes = node.elementsByTagName( "narrative" );
        QDomNodeList points = node.elementsByTagName( "startPoint" );
        QDomNodeList streets = node.elementsByTagName( "streets" );

        Q_ASSERT( mapping.contains( i ) );
        if ( textNodes.size() == 1 && maneuver.size() == 1 && points.size() == 1 && mapping.contains( i ) ) {
            GeoDataPlacemark* instruction = new GeoDataPlacemark;
            instruction->setName( textNodes.at( 0 ).toElement().text() );

            GeoDataExtendedData extendedData;
            GeoDataData turnType;
            turnType.setName( "turnType" );
            turnType.setValue( maneuverType( maneuver.at( 0 ).toElement().text().toInt() ) );
            extendedData.addValue( turnType );
            if ( streets.size() == 1 ) {
                GeoDataData roadName;
                roadName.setName( "roadName" );
                roadName.setValue( streets.at( 0 ).toElement().text() );
                extendedData.addValue( roadName );
            }
            instruction->setExtendedData( extendedData );

            int const start = mapping[i];
            int const end = mapping.contains(i+1) ? mapping[i+1] : routeWaypoints->size()-1;
            if ( start >= 0 && start < routeWaypoints->size() && end < routeWaypoints->size() ) {
                instruction->setName( textNodes.item( 0 ).toElement().text() );
                GeoDataLineString *lineString = new GeoDataLineString;
                for ( int j=start; j<=end; ++j ) {
                    *lineString << GeoDataCoordinates( routeWaypoints->at( j ).longitude(), routeWaypoints->at( j ).latitude() );
                }

                if ( !lineString->isEmpty() ) {
                    instruction->setGeometry( lineString );
                    result->append( instruction );
                }
            }
        }
    }

    if ( routeWaypoints->size() < 1 ) {
        delete result;
        result = 0;
    }

//.........这里部分代码省略.........

GeoDataDocument *CycleStreetsRunner::parse( const QByteArray &content ) const
{
    QDomDocument xml;
    if ( !xml.setContent( content ) ) {
        mDebug() << "Cannot parse xml file with routing instructions.";
        return 0;
    }
    GeoDataDocument *result = new GeoDataDocument();
    result->setName( "CycleStreets" );
    GeoDataPlacemark *routePlacemark = new GeoDataPlacemark;
    routePlacemark->setName( "Route" );

    GeoDataLineString *routeWaypoints = new GeoDataLineString;
    QDomNodeList features = xml.elementsByTagName( "gml:featureMember" );

    if ( features.isEmpty() ) {
        return 0;
    }
    QDomElement route = features.at( 0 ).toElement().firstChild().toElement();
    QDomElement lineString = route.elementsByTagName( "gml:LineString" ).at( 0 ).toElement();
    QDomElement coordinates = lineString.toElement().elementsByTagName( "gml:coordinates" ).at( 0 ).toElement();
    QStringList coordinatesList = coordinates.text().split( ' ' );

    QStringList::iterator iter = coordinatesList.begin();
    QStringList::iterator end = coordinatesList.end();

    for( ; iter != end; ++iter) {
        QStringList coordinate =  iter->split(',');
        if ( coordinate.size() == 2 ) {
            double const lon = coordinate.at( 0 ).toDouble();
            double const lat = coordinate.at( 1 ).toDouble();
            GeoDataCoordinates const position( lon, lat, 0.0, GeoDataCoordinates::Degree );
            routeWaypoints->append( position );
        }
    }
    routePlacemark->setGeometry( routeWaypoints );

    QDomElement durationElement = route.elementsByTagName( "cs:time" ).at(0).toElement();
    QTime duration;
    duration = duration.addSecs( durationElement.text().toInt() );
    qreal length = routeWaypoints->length( EARTH_RADIUS );

    const QString name = nameString( "CS", length, duration );
    const GeoDataExtendedData data = routeData( length, duration );
    routePlacemark->setExtendedData( data );
    result->setName( name );
    result->append( routePlacemark );

    int i;
    for ( i = 1; i < features.count() && features.at( i ).firstChildElement().tagName() != "cs:segment"; ++i );
    for ( ; i < features.count(); ++i) {
        QDomElement segment = features.at( i ).toElement();

        QString name = segment.elementsByTagName( "cs:name" ).at( 0 ).toElement().text();
        QString maneuver = segment.elementsByTagName( "cs:turn" ).at( 0 ).toElement().text();
        QStringList points = segment.elementsByTagName( "cs:points" ).at( 0 ).toElement().text().split( ' ' );
        QStringList const elevation = segment.elementsByTagName( "cs:elevations" ).at( 0 ).toElement().text().split( ',' );

        GeoDataPlacemark *instructions = new GeoDataPlacemark;
        QString instructionName;
        if ( !maneuver.isEmpty() ) {
            instructionName = maneuver.left( 1 ).toUpper() + maneuver.mid( 1 );
        } else {
            instructionName = "Straight";
        }
        if ( name != "Short un-named link" && name != "Un-named link" ){
            instructionName.append( " into " + name );
        }
        instructions->setName( instructionName );

        GeoDataExtendedData extendedData;
        GeoDataData turnType;
        turnType.setName( "turnType" );
        turnType.setValue( maneuverType( maneuver ) );
        extendedData.addValue( turnType );

        instructions->setExtendedData( extendedData );
        GeoDataLineString *lineString = new GeoDataLineString;
        QStringList::iterator iter = points.begin();
        QStringList::iterator end = points.end();
        for  ( int j=0; iter != end; ++iter, ++j ) {
            QStringList coordinate = iter->split( ',' );
            if ( coordinate.size() == 2 ) {
                double const lon = coordinate.at( 0 ).toDouble();
                double const lat = coordinate.at( 1 ).toDouble();
                double const alt = j < elevation.size() ? elevation[j].toDouble() : 0.0;
                lineString->append( GeoDataCoordinates( lon, lat, alt, GeoDataCoordinates::Degree ) );
            }
        }
        instructions->setGeometry( lineString );
        result->append( instructions );
    }
    return result;
}