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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

Product type Paperback

Published in Jan 2016

Publisher

ISBN-13 9781782168874

Length 512 pages

Edition 1st Edition

Tools

Qt

Concepts

Game Scripting

Authors (2):

Lorenz Haas

Witold Wysota

View More author details

Table of Contents (13) Chapters

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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Authors (2)

Witold Wysota

Witold Wysota

Witold Wysota is a software architect and developer living in Poland. He started his adventure with Qt in 2004 when he joined QtForum.org and started answering questions about programming with Qt and shortly afterwards became part of the moderator group of the forum. In 2006, together with with the the moderator team, he established QtCentre.org which quickly became the largest community-driven support site devoted to Qt. For a number of years he conducted commercial, academic and public trainings, workshops, has given lectures on Qt, Qt Quick and related technologies. He is a certified Qt developer and was a member of Qt in Education Advisory Board with Nokia where he helped preparing materials for using Qt in educational activities. Witold was also a technical reviewer of Foundations of Qt Development by Johan Thelin, a book about Qt4 and an author of a couple of articles on programming with Qt. In real life Witold is a passionate adept of Seven Star Praying Mantis, a traditional style of Chinese martial arts. I would like to thank all people who have worked on Qt development over the years for creating such great programming framework which was the main force shaping my programming career. I would also like to thank Lorenz for helping me with the book as well as Packt for magnitudes of patience towards me during the process of creating this book.

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Lorenz Haas

Lorenz Haas

Lorenz Haas is a passionate programmer who started his Qt career with Qt 3. Thrilled by Qt's great community, especially the one at QtCentre.org, he immerses himself in this framework, became one of the first certified Qt developers and specialists, and turned his love for Qt into profession. Haas is now working at a medium-sized IT-company based in Erlangen, Germany, as a lead software architect. He mainly develops machine controls and their user interfaces as well as general solutions for the industry sector. Additionally he runs his own small consultancy and programming-business called Histomatics. You can contact him at qtbook@histomatics.de. A few years ago he started contributing to Qt Creator. He added a couple of refactoring options you probably rely on a regular basis if you use Qt Creator. He is also the author of the it's Beautifier plug-in. I would like to thank Witold who guided my fist steps into the Qt world back in the days and who still is assisting me with any problems that may arise today. I am also very grateful to him for taking me on board for this book-writing project. He's an excellent teacher and tutor! Second, I would like to thank the team at Packt who helped and guided us through the entire process of writing this book.

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