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Game Programming Using Qt Beginner's Guide

You're reading from   Game Programming Using Qt Beginner's Guide A complete guide to designing and building fun games with Qt and Qt Quick 2 using associated toolsets

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Product type Paperback
Published in Jan 2016
Publisher
ISBN-13 9781782168874
Length 512 pages
Edition 1st Edition
Tools
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Authors (2):
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Lorenz Haas Lorenz Haas
Author Profile Icon Lorenz Haas
Lorenz Haas
Witold Wysota Witold Wysota
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Witold Wysota
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Toc

Table of Contents (13) Chapters Close

Preface 1. Introduction to Qt FREE CHAPTER 2. Installation 3. Qt GUI Programming 4. Qt Core Essentials 5. Graphics with Qt 6. Graphics View 7. Networking 8. Scripting 9. Qt Quick Basics 10. Qt Quick A. Pop Quiz Answers Index

Using UDP

In contrast to TCP, UDP is unreliable and connectionless. Neither the order of packets, nor their delivery is guaranteed. UDP, however, is very fast. So, if you have frequent data, which does not necessarily need to be received by the peer, use UDP. This data could, for example, be real-time positions of a player that get updated frequently or live video/audio streaming. Since QUdpSocket is mostly the same as QTcpSocket—both inherit QAbstractSocket—there is not much to explain. The main difference between them is that TCP is stream-orientated, whereas UDP is datagram-orientated. This means that the data is sent in small packages, containing among the actual content, the sender's as well as the receiver's IP address and port number. Due to the lack of QUdpServer, you have to use QAbstractSocket::bind() instead of QTcpServer::listen(). Like listen(), bind() takes the addresses and ports that are allowed to send datagrams as arguments. Whenever a new package...

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