Book Image

OpenGL Game Development By Example

By : Stephen Madsen, Robert Madsen
Book Image

OpenGL Game Development By Example

By: Stephen Madsen, Robert Madsen

Overview of this book

OpenGL is one of the most popular rendering SDKs used to develop games. OpenGL has been used to create everything from 3D masterpieces running on desktop computers to 2D puzzles running on mobile devices. You will learn to apply both 2D and 3D technologies to bring your game idea to life. There is a lot more to making a game than just drawing pictures and that is where this book is unique! It provides a complete tutorial on designing and coding games from the setup of the development environment to final credits screen, through the creation of a 2D and 3D game. The book starts off by showing you how to set up a development environment using Visual Studio, and create a code framework for your game. It then walks you through creation of two games–a 2D platform game called Roboracer 2D and a 3D first-person space shooter game–using OpenGL to render both 2D and 3D graphics using a 2D coordinate system. You'll create sprite classes, render sprites and animation, and navigate and control the characters. You will also learn how to implement input, use audio, and code basic collision and physics systems. From setting up the development environment to creating the final credits screen, the book will take you through the complete journey of creating a game engine that you can extend to create your own games.
Table of Contents (19 chapters)
OpenGL Game Development By Example
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Taking control


We now have a framework to load and render game objects. But, we don't have any way to move our ship! The good news is that we already wrote an input class for RoboRacer2D, and we can reuse that code here.

Implementing input

Earlier in the chapter, I had you copy the Input class from RoboRacer2D into the source folder for SpaceRacer3D. Now, we have to simply wire it into our game code.

Open SpaceRacer3D. First, we need to include the input header. Add the following line of code to the headers:

#include "Input.h"

We also need to create a global pointer to manage the Input class. Add the following line just below the model pointers:

Input* m_input;

Next, we need to create an instance of the Input class. Add the following line of code to the top of the StartGame function:

m_input = new Input(hWnd);

Now, we have to create a function to handle our input. Add the following function just above the Update method:

void ProcessInput(const float p_deltaTime)
{
 Vec3 rotation;
 m_input->Update...