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

Time for action – drawing a triangle using Qt and OpenGL


For the first exercise, we will create a subclass of QOpenGLWindow that renders a triangle using simple OpenGL calls. Create a new project starting with Empty qmake Project from the Other Projects group as the template. In the project file, put the following content:

QT = core gui
TARGET = triangle
TEMPLATE = app

Having the basic project setup ready, let's define a SimpleGLWindow class as a subclass of QOpenGLWindow and override the initializeGL() method to set white as the clear color of our scene. We do this by calling an OpenGL function called glClearColor. Qt provides a convenience class called QOpenGLFunctions that takes care of resolving most commonly used OpenGL functions in a platform-independent way. This is the recommended approach to access OpenGLES functions in a platform-independent manner. Our window is going to inherit not only QOpenGLWindow but also QOpenGLFunctions. However, since we don't want to allow external access...