Book Image

Game Programming Using Qt: Beginner's Guide

By : Lorenz Haas, Witold Wysota, Witold Wysota, Lorenz Haas
Book Image

Game Programming Using Qt: Beginner's Guide

By: Lorenz Haas, Witold Wysota, Witold Wysota, Lorenz Haas

Overview of this book

Qt is the leading cross-platform toolkit for all significant desktop, mobile, and embedded platforms and is becoming more popular by the day, especially on mobile and embedded devices. Despite its simplicity, it's a powerful tool that perfectly fits game developers’ needs. Using Qt and Qt Quick, it is easy to build fun games or shiny user interfaces. You only need to create your game once and deploy it on all major platforms like iOS, Android, and WinRT without changing a single source file. The book begins with a brief introduction to creating an application and preparing a working environment for both desktop and mobile platforms. It then dives deeper into the basics of creating graphical interfaces and Qt core concepts of data processing and display before you try creating a game. As you progress through the chapters, you’ll learn to enrich your games by implementing network connectivity and employing scripting. We then delve into Qt Quick, OpenGL, and various other tools to add game logic, design animation, add game physics, and build astonishing UI for the games. Towards the final chapters, you’ll learn to exploit mobile device features such as accelerators and sensors to build engaging user experiences. If you are planning to learn about Qt and its associated toolsets to build apps and games, this book is a must have.
Table of Contents (18 chapters)
Game Programming Using Qt
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Declarative UI programming


Although it is technically possible to use Qt Quick by writing C++ code, the module is accompanied by a dedicated programming language called QML (Qt Modeling Language). QML is an easy to read and understand declarative language that describes the world as a hierarchy of components that interact and relate to one another. It uses a JSON-like syntax and allows us to use imperative JavaScript expressions as well as dynamic property bindings. So, what is a declarative language, anyway?

Declarative programming is one of the programming paradigms that dictates that the program describes the logic of the computation without specifying how this result should be obtained. In contrast to imperative programming, where the logic is expressed as a list of explicit steps forming an algorithm that directly modifies the intermediate program state, a declarative approach focuses on what the ultimate result of the operation should be.

We use QML by creating one or more QML documents...