Read binary data from PLY file using Qt-CodePudding

Im trying to read data from this file:

Which contains both ascii text and float numbers stored in binary. I'm trying to read it by doing the following:

        QTextStream in(file);

        QString line;
        line = in.readLine();
        while (!line.startsWith(QString("element vertex"))) {
            line = in.readLine();
        }
        point_count = line.split(QString(" ")).last().toInt();
        qDebug() << "PC: " << point_count;

        while (line != "end_header") {
            line = in.readLine();
        }

        QDataStream* stream = new QDataStream(file);
        stream->skipRawData(in.pos());
        stream->setFloatingPointPrecision(QDataStream::SinglePrecision);

        float number;
        (*stream) >> number;
        qDebug() << "Float: " << number;

But I read -1.98117e 13, which I guess it is wrong, what am I doing wrong?

CodePudding user response：

The default byte order for QDataStream is big endian; change it to little endian:

stream->setByteOrder(QDataStream::LittleEndian)