Game Programming Using Qt Beginner's Guide

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 ...