Book Image

Beginning C++ Game Programming - Second Edition

By : John Horton
Book Image

Beginning C++ Game Programming - Second Edition

By: John Horton

Overview of this book

The second edition of Beginning C++ Game Programming is updated and improved to include the latest features of Visual Studio 2019, SFML, and modern C++ programming techniques. With this book, you’ll get a fun introduction to game programming by building five fully playable games of increasing complexity. You’ll learn to build clones of popular games such as Timberman, Pong, a Zombie survival shooter, a coop puzzle platformer and Space Invaders. The book starts by covering the basics of programming. You’ll study key C++ topics, such as object-oriented programming (OOP) and C++ pointers, and get acquainted with the Standard Template Library (STL). The book helps you learn about collision detection techniques and game physics by building a Pong game. As you build games, you’ll also learn exciting game programming concepts such as particle effects, directional sound (spatialization), OpenGL programmable shaders, spawning objects, and much more. Finally, you’ll explore game design patterns to enhance your C++ game programming skills. By the end of the book, you’ll have gained the knowledge you need to build your own games with exciting features from scratch
Table of Contents (25 chapters)
23
Chapter 23: Before You Go...

Moving the clouds and the bee

Let's use the elapsed time since the last frame to breathe life into the bee and the clouds. This will solve the problem of having a consistent frame rate across different PCs.

Giving life to the bee

The first thing we want to do is set up the bee at a certain height and a certain speed. We only want to do this when the bee is inactive. Due to this, we will wrap the following code in an if block. Examine and add the following highlighted code, and then we will discuss it:

/*
****************************************
Update the scene
****************************************
*/
// Measure time
Time dt = clock.restart();
// Setup the bee
if (!beeActive)
{
    // How fast is the bee
    srand((int)time(0));
    beeSpeed = (rand() % 200) + 200;
    // How high is the bee
    srand((int)time(0) * 10);
    float height = (rand(...