new bee here. I am sorry if there are similar questions but i just dont even know how to ask it properly. the thing is, i have to do some project for the uni and i am stuck now. i am getting info through udp and need to store the yield info to pass in to objects(car coordinates) i have to do it for 20 objects therefore it is much more complicated. i have this code and it should be working as my prof. told me but i have to figure out how, on my own, to store it. tried QList and QMap but i couldnt figure out how it is possible to have
anArray[num].posX=somenumber;
so i have to store coordinates for each car as car1.x, car1.y, car1z then in the loop count increases; car2.x and so on.
i dont know if my question or what i wanted to ask is clear enough but please bear with me
while(mSocket->hasPendingDatagrams()){
QByteArray datagram;
QHostAddress crrAddress;
quint16 crrPort;
datagram.resize( int(mSocket->pendingDatagramSize()) );
mSocket->readDatagram(datagram.data(), datagram.size(), &crrAddress, &crrPort);
double* resultList = new double[(datagram.size() / int(sizeof(double))) ];
memcpy(&resultList[0], datagram.data(), size_t(datagram.size()));
for(quint16 count = 0; (count) < mVehicleCount; count++) {
mVehicleMap[mArrayOffset + count].ID = int16_t(resultList[7 + 11 * count]);
mVehicleMap[mArrayOffset + count].pose.position.x = resultList[(1 + 11 * count)];
mVehicleMap[mArrayOffset + count].pose.position.y = resultList[(2 + 11 * count)];
mVehicleMap[mArrayOffset + count].pose.position.z = resultList[(3 + 11 * count)];
mVehicleMap[mArrayOffset + count].pose.orientation.x = resultList[(6 + 11 * count)];
}
delete[] resultList;
You can use QList or QVector class for your goal (Qt documentation: QList, QVector).
Simple example for QVector:
struct Vehicle
{
qint16 ID_;
double position_x_;
double position_y_;
double position_z_;
double orintation_x_;
};
...
QVector<Vehicle> vehicles(maxVehicleCount); // maxVehicalCount - you variable
...
while(mSocket->hasPendingDatagrams()){
QByteArray datagram;
QHostAddress crrAddress;
quint16 crrPort;
datagram.resize( int(mSocket->pendingDatagramSize()) );
mSocket->readDatagram(datagram.data(), datagram.size(), &crrAddress, &crrPort);
double* resultList = new double[(datagram.size() / int(sizeof(double))) ];
memcpy(&resultList[0], datagram.data(), size_t(datagram.size()));
for(quint16 count = 0; (count) < mVehicleCount; count++) {
vehicles[mArrayOffset + count].ID_ = qint16(resultList[7 + 11 * count]);
vehicles[mArrayOffset + count].position_x_ = resultList[(1 + 11 * count)];
vehicles[mArrayOffset + count].position_y_ = resultList[(2 + 11 * count)];
vehicles[mArrayOffset + count].position_z_ = resultList[(3 + 11 * count)];
vehicles[mArrayOffset + count].orintation_x_ = resultList[(6 + 11 * count)];
}
delete[] resultList;
}
Also you can use QMap class (Qt doucmentation: QMap):
struct Vehicle
{
qint16 ID_;
double position_x_;
double position_y_;
double position_z_;
double orintation_x_;
};
...
QMap<qint16, Vehicle*> vehicleMap;
...
while(true/*mSocket->hasPendingDatagrams()*/){
QByteArray datagram;
QHostAddress crrAddress;
quint16 crrPort;
datagram.resize( int(mSocket->pendingDatagramSize()) );
mSocket->readDatagram(datagram.data(), datagram.size(), &crrAddress, &crrPort);
double* resultList = new double[(datagram.size() / int(sizeof(double))) ];
memcpy(&resultList[0], datagram.data(), size_t(datagram.size()));
for(quint16 count = 0; (count) < mVehicleCount; count++) {
Vehicle* vehicle = new Vehicle();
vehicle.ID_ = qint16(resultList[7 + 11 * count]);
vehicle.position_x_ = resultList[(1 + 11 * count)];
vehicle.position_y_ = resultList[(2 + 11 * count)];
vehicle.position_z_ = resultList[(3 + 11 * count)];
vehicle.orintation_x_ = resultList[(6 + 11 * count)];
vehicleMap.insert(vehicle.ID_, vehicle);
}
delete[] resultList;
}